./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/bench-exp2x6.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/bench-exp2x6.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/bin/uautomizer-uyxdKDjOR8 --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 19006bb1633253053764e43b8bfff1653449498b05ea53714e3311a41e35d730 --- 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-2329fc7 [2022-12-13 19:47:40,708 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 19:47:40,710 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 19:47:40,728 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 19:47:40,728 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 19:47:40,729 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 19:47:40,731 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 19:47:40,732 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 19:47:40,734 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 19:47:40,735 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 19:47:40,736 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 19:47:40,737 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 19:47:40,737 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 19:47:40,738 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 19:47:40,739 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 19:47:40,740 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 19:47:40,741 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 19:47:40,742 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 19:47:40,743 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 19:47:40,745 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 19:47:40,746 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 19:47:40,747 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 19:47:40,748 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 19:47:40,749 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 19:47:40,752 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 19:47:40,753 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 19:47:40,753 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 19:47:40,754 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 19:47:40,754 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 19:47:40,755 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 19:47:40,755 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 19:47:40,756 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 19:47:40,757 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 19:47:40,757 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 19:47:40,758 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 19:47:40,758 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 19:47:40,759 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 19:47:40,759 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 19:47:40,759 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 19:47:40,760 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 19:47:40,760 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 19:47:40,761 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 19:47:40,780 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 19:47:40,780 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 19:47:40,780 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 19:47:40,781 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 19:47:40,781 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 19:47:40,781 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 19:47:40,782 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 19:47:40,782 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 19:47:40,782 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 19:47:40,782 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 19:47:40,783 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 19:47:40,783 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 19:47:40,783 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 19:47:40,783 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 19:47:40,783 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 19:47:40,783 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 19:47:40,783 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 19:47:40,784 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 19:47:40,784 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 19:47:40,784 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 19:47:40,784 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 19:47:40,784 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 19:47:40,784 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 19:47:40,785 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 19:47:40,785 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:47:40,785 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 19:47:40,785 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 19:47:40,785 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 19:47:40,785 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 19:47:40,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 19:47:40,786 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 19:47:40,786 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 19:47:40,786 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 19:47:40,786 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 19:47:40,786 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 19:47:40,786 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_da503b3a-5d71-4762-9ec0-14e9493bfb08/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 19006bb1633253053764e43b8bfff1653449498b05ea53714e3311a41e35d730 [2022-12-13 19:47:40,958 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 19:47:40,980 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 19:47:40,982 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 19:47:40,983 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 19:47:40,983 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 19:47:40,984 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/bench-exp2x6.wvr.c [2022-12-13 19:47:43,601 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 19:47:43,757 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 19:47:43,758 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/sv-benchmarks/c/weaver/bench-exp2x6.wvr.c [2022-12-13 19:47:43,762 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/bin/uautomizer-uyxdKDjOR8/data/ee120da98/a9e1655d82c44256b0ed1f94a4254da0/FLAG1a8acf395 [2022-12-13 19:47:43,774 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/bin/uautomizer-uyxdKDjOR8/data/ee120da98/a9e1655d82c44256b0ed1f94a4254da0 [2022-12-13 19:47:43,776 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 19:47:43,777 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 19:47:43,778 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 19:47:43,779 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 19:47:43,782 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 19:47:43,783 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:47:43" (1/1) ... [2022-12-13 19:47:43,784 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4aa229ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:47:43, skipping insertion in model container [2022-12-13 19:47:43,784 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:47:43" (1/1) ... [2022-12-13 19:47:43,792 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 19:47:43,811 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 19:47:43,957 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/sv-benchmarks/c/weaver/bench-exp2x6.wvr.c[2453,2466] [2022-12-13 19:47:43,961 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:47:43,969 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 19:47:43,986 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/sv-benchmarks/c/weaver/bench-exp2x6.wvr.c[2453,2466] [2022-12-13 19:47:43,987 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:47:43,998 INFO L208 MainTranslator]: Completed translation [2022-12-13 19:47:43,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:47:43 WrapperNode [2022-12-13 19:47:43,999 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 19:47:44,000 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 19:47:44,000 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 19:47:44,000 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 19:47:44,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:47:43" (1/1) ... [2022-12-13 19:47:44,013 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:47:43" (1/1) ... [2022-12-13 19:47:44,028 INFO L138 Inliner]: procedures = 20, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 91 [2022-12-13 19:47:44,029 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 19:47:44,029 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 19:47:44,029 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 19:47:44,029 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 19:47:44,037 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:47:43" (1/1) ... [2022-12-13 19:47:44,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:47:43" (1/1) ... [2022-12-13 19:47:44,039 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:47:43" (1/1) ... [2022-12-13 19:47:44,039 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:47:43" (1/1) ... [2022-12-13 19:47:44,043 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:47:43" (1/1) ... [2022-12-13 19:47:44,046 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:47:43" (1/1) ... [2022-12-13 19:47:44,047 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:47:43" (1/1) ... [2022-12-13 19:47:44,048 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:47:43" (1/1) ... [2022-12-13 19:47:44,050 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 19:47:44,051 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 19:47:44,051 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 19:47:44,051 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 19:47:44,052 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:47:43" (1/1) ... [2022-12-13 19:47:44,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:47:44,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:47:44,077 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 19:47:44,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 19:47:44,115 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 19:47:44,115 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 19:47:44,115 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 19:47:44,116 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 19:47:44,116 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 19:47:44,116 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 19:47:44,116 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 19:47:44,116 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-12-13 19:47:44,116 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-12-13 19:47:44,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 19:47:44,117 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 19:47:44,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 19:47:44,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 19:47:44,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 19:47:44,117 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 19:47:44,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 19:47:44,119 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 19:47:44,200 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 19:47:44,202 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 19:47:44,439 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 19:47:44,449 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 19:47:44,450 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-13 19:47:44,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:47:44 BoogieIcfgContainer [2022-12-13 19:47:44,453 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 19:47:44,455 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 19:47:44,456 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 19:47:44,458 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 19:47:44,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 07:47:43" (1/3) ... [2022-12-13 19:47:44,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d326de9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:47:44, skipping insertion in model container [2022-12-13 19:47:44,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:47:43" (2/3) ... [2022-12-13 19:47:44,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d326de9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:47:44, skipping insertion in model container [2022-12-13 19:47:44,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:47:44" (3/3) ... [2022-12-13 19:47:44,462 INFO L112 eAbstractionObserver]: Analyzing ICFG bench-exp2x6.wvr.c [2022-12-13 19:47:44,469 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 19:47:44,478 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 19:47:44,478 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 19:47:44,478 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 19:47:44,567 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-13 19:47:44,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 137 transitions, 306 flow [2022-12-13 19:47:44,674 INFO L130 PetriNetUnfolder]: 10/133 cut-off events. [2022-12-13 19:47:44,674 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-13 19:47:44,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 133 events. 10/133 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 87 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 93. Up to 2 conditions per place. [2022-12-13 19:47:44,679 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 137 transitions, 306 flow [2022-12-13 19:47:44,683 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 123 places, 120 transitions, 264 flow [2022-12-13 19:47:44,686 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 19:47:44,695 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 123 places, 120 transitions, 264 flow [2022-12-13 19:47:44,697 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 123 places, 120 transitions, 264 flow [2022-12-13 19:47:44,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 120 transitions, 264 flow [2022-12-13 19:47:44,723 INFO L130 PetriNetUnfolder]: 10/120 cut-off events. [2022-12-13 19:47:44,723 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-13 19:47:44,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 120 events. 10/120 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 88 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 93. Up to 2 conditions per place. [2022-12-13 19:47:44,725 INFO L119 LiptonReduction]: Number of co-enabled transitions 2160 [2022-12-13 19:47:48,274 INFO L134 LiptonReduction]: Checked pairs total: 2179 [2022-12-13 19:47:48,274 INFO L136 LiptonReduction]: Total number of compositions: 105 [2022-12-13 19:47:48,284 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 19:47:48,289 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;@6e639a79, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 19:47:48,289 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-12-13 19:47:48,293 INFO L130 PetriNetUnfolder]: 4/24 cut-off events. [2022-12-13 19:47:48,294 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-13 19:47:48,294 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:47:48,294 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] [2022-12-13 19:47:48,295 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 19:47:48,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:47:48,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1489859345, now seen corresponding path program 1 times [2022-12-13 19:47:48,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:47:48,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994827751] [2022-12-13 19:47:48,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:47:48,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:47:48,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:48,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:48,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:47:48,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994827751] [2022-12-13 19:47:48,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994827751] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:47:48,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:47:48,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:47:48,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661950536] [2022-12-13 19:47:48,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:47:48,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:47:48,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:47:48,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:47:48,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:47:48,914 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 242 [2022-12-13 19:47:48,916 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:48,916 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:47:48,917 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 242 [2022-12-13 19:47:48,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:47:49,061 INFO L130 PetriNetUnfolder]: 497/677 cut-off events. [2022-12-13 19:47:49,061 INFO L131 PetriNetUnfolder]: For 59/59 co-relation queries the response was YES. [2022-12-13 19:47:49,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1448 conditions, 677 events. 497/677 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1766 event pairs, 117 based on Foata normal form. 1/414 useless extension candidates. Maximal degree in co-relation 1016. Up to 471 conditions per place. [2022-12-13 19:47:49,065 INFO L137 encePairwiseOnDemand]: 236/242 looper letters, 41 selfloop transitions, 5 changer transitions 1/47 dead transitions. [2022-12-13 19:47:49,066 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 47 transitions, 233 flow [2022-12-13 19:47:49,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:47:49,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:47:49,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 342 transitions. [2022-12-13 19:47:49,077 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47107438016528924 [2022-12-13 19:47:49,077 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 342 transitions. [2022-12-13 19:47:49,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 342 transitions. [2022-12-13 19:47:49,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:47:49,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 342 transitions. [2022-12-13 19:47:49,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:49,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:49,087 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:49,089 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 74 flow. Second operand 3 states and 342 transitions. [2022-12-13 19:47:49,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 47 transitions, 233 flow [2022-12-13 19:47:49,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 47 transitions, 203 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-12-13 19:47:49,094 INFO L231 Difference]: Finished difference. Result has 29 places, 29 transitions, 91 flow [2022-12-13 19:47:49,096 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=29, PETRI_TRANSITIONS=29} [2022-12-13 19:47:49,098 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, -5 predicate places. [2022-12-13 19:47:49,098 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 29 transitions, 91 flow [2022-12-13 19:47:49,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:49,099 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:47:49,099 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] [2022-12-13 19:47:49,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 19:47:49,099 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 19:47:49,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:47:49,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1761031974, now seen corresponding path program 1 times [2022-12-13 19:47:49,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:47:49,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437590870] [2022-12-13 19:47:49,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:47:49,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:47:49,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:49,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:49,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:47:49,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437590870] [2022-12-13 19:47:49,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437590870] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:47:49,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:47:49,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 19:47:49,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947025618] [2022-12-13 19:47:49,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:47:49,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:47:49,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:47:49,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:47:49,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:47:49,453 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 242 [2022-12-13 19:47:49,454 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 29 transitions, 91 flow. Second operand has 4 states, 4 states have (on average 97.5) internal successors, (390), 4 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:49,454 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:47:49,454 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 242 [2022-12-13 19:47:49,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:47:49,638 INFO L130 PetriNetUnfolder]: 461/641 cut-off events. [2022-12-13 19:47:49,639 INFO L131 PetriNetUnfolder]: For 177/177 co-relation queries the response was YES. [2022-12-13 19:47:49,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1641 conditions, 641 events. 461/641 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1831 event pairs, 17 based on Foata normal form. 36/677 useless extension candidates. Maximal degree in co-relation 586. Up to 435 conditions per place. [2022-12-13 19:47:49,643 INFO L137 encePairwiseOnDemand]: 235/242 looper letters, 50 selfloop transitions, 9 changer transitions 1/60 dead transitions. [2022-12-13 19:47:49,643 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 60 transitions, 289 flow [2022-12-13 19:47:49,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:47:49,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 19:47:49,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 430 transitions. [2022-12-13 19:47:49,647 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44421487603305787 [2022-12-13 19:47:49,647 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 430 transitions. [2022-12-13 19:47:49,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 430 transitions. [2022-12-13 19:47:49,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:47:49,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 430 transitions. [2022-12-13 19:47:49,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 107.5) internal successors, (430), 4 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:49,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 242.0) internal successors, (1210), 5 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:49,653 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 242.0) internal successors, (1210), 5 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:49,653 INFO L175 Difference]: Start difference. First operand has 29 places, 29 transitions, 91 flow. Second operand 4 states and 430 transitions. [2022-12-13 19:47:49,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 60 transitions, 289 flow [2022-12-13 19:47:49,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 60 transitions, 282 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:47:49,655 INFO L231 Difference]: Finished difference. Result has 32 places, 33 transitions, 127 flow [2022-12-13 19:47:49,655 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=127, PETRI_PLACES=32, PETRI_TRANSITIONS=33} [2022-12-13 19:47:49,656 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, -2 predicate places. [2022-12-13 19:47:49,656 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 33 transitions, 127 flow [2022-12-13 19:47:49,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 97.5) internal successors, (390), 4 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:49,657 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:47:49,657 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] [2022-12-13 19:47:49,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 19:47:49,657 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 19:47:49,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:47:49,658 INFO L85 PathProgramCache]: Analyzing trace with hash 65659389, now seen corresponding path program 1 times [2022-12-13 19:47:49,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:47:49,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843200220] [2022-12-13 19:47:49,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:47:49,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:47:49,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:49,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:49,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:47:49,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843200220] [2022-12-13 19:47:49,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843200220] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:47:49,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:47:49,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 19:47:49,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2852974] [2022-12-13 19:47:49,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:47:49,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:47:49,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:47:49,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:47:49,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:47:49,923 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 242 [2022-12-13 19:47:49,924 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 33 transitions, 127 flow. Second operand has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:49,924 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:47:49,924 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 242 [2022-12-13 19:47:49,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:47:50,143 INFO L130 PetriNetUnfolder]: 657/915 cut-off events. [2022-12-13 19:47:50,143 INFO L131 PetriNetUnfolder]: For 660/660 co-relation queries the response was YES. [2022-12-13 19:47:50,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2530 conditions, 915 events. 657/915 cut-off events. For 660/660 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2727 event pairs, 55 based on Foata normal form. 32/947 useless extension candidates. Maximal degree in co-relation 831. Up to 349 conditions per place. [2022-12-13 19:47:50,149 INFO L137 encePairwiseOnDemand]: 237/242 looper letters, 72 selfloop transitions, 13 changer transitions 0/85 dead transitions. [2022-12-13 19:47:50,149 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 85 transitions, 471 flow [2022-12-13 19:47:50,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:47:50,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:47:50,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 592 transitions. [2022-12-13 19:47:50,152 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48925619834710743 [2022-12-13 19:47:50,152 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 592 transitions. [2022-12-13 19:47:50,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 592 transitions. [2022-12-13 19:47:50,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:47:50,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 592 transitions. [2022-12-13 19:47:50,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.4) internal successors, (592), 5 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:50,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 242.0) internal successors, (1452), 6 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:50,158 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 242.0) internal successors, (1452), 6 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:50,158 INFO L175 Difference]: Start difference. First operand has 32 places, 33 transitions, 127 flow. Second operand 5 states and 592 transitions. [2022-12-13 19:47:50,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 85 transitions, 471 flow [2022-12-13 19:47:50,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 85 transitions, 449 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 19:47:50,161 INFO L231 Difference]: Finished difference. Result has 36 places, 41 transitions, 192 flow [2022-12-13 19:47:50,161 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=192, PETRI_PLACES=36, PETRI_TRANSITIONS=41} [2022-12-13 19:47:50,162 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 2 predicate places. [2022-12-13 19:47:50,162 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 41 transitions, 192 flow [2022-12-13 19:47:50,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:50,163 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:47:50,163 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] [2022-12-13 19:47:50,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 19:47:50,163 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 19:47:50,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:47:50,164 INFO L85 PathProgramCache]: Analyzing trace with hash 587851792, now seen corresponding path program 2 times [2022-12-13 19:47:50,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:47:50,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599793911] [2022-12-13 19:47:50,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:47:50,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:47:50,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:50,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:50,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:47:50,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599793911] [2022-12-13 19:47:50,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599793911] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:47:50,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556872796] [2022-12-13 19:47:50,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:47:50,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:47:50,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:47:50,336 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:47:50,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 19:47:50,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:47:50,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:47:50,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 19:47:50,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:47:50,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:50,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:47:50,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:50,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556872796] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:47:50,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:47:50,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 19:47:50,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360950014] [2022-12-13 19:47:50,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:47:50,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 19:47:50,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:47:50,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 19:47:50,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-13 19:47:50,869 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 242 [2022-12-13 19:47:50,870 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 41 transitions, 192 flow. Second operand has 7 states, 7 states have (on average 96.85714285714286) internal successors, (678), 7 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:50,870 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:47:50,870 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 242 [2022-12-13 19:47:50,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:47:51,255 INFO L130 PetriNetUnfolder]: 1187/1637 cut-off events. [2022-12-13 19:47:51,255 INFO L131 PetriNetUnfolder]: For 1869/1869 co-relation queries the response was YES. [2022-12-13 19:47:51,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5416 conditions, 1637 events. 1187/1637 cut-off events. For 1869/1869 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5670 event pairs, 145 based on Foata normal form. 68/1675 useless extension candidates. Maximal degree in co-relation 2926. Up to 735 conditions per place. [2022-12-13 19:47:51,267 INFO L137 encePairwiseOnDemand]: 235/242 looper letters, 107 selfloop transitions, 14 changer transitions 3/124 dead transitions. [2022-12-13 19:47:51,267 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 124 transitions, 761 flow [2022-12-13 19:47:51,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:47:51,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 19:47:51,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 652 transitions. [2022-12-13 19:47:51,270 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4490358126721763 [2022-12-13 19:47:51,271 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 652 transitions. [2022-12-13 19:47:51,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 652 transitions. [2022-12-13 19:47:51,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:47:51,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 652 transitions. [2022-12-13 19:47:51,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 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) [2022-12-13 19:47:51,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 242.0) internal successors, (1694), 7 states have internal predecessors, (1694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:51,277 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 242.0) internal successors, (1694), 7 states have internal predecessors, (1694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:51,277 INFO L175 Difference]: Start difference. First operand has 36 places, 41 transitions, 192 flow. Second operand 6 states and 652 transitions. [2022-12-13 19:47:51,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 124 transitions, 761 flow [2022-12-13 19:47:51,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 124 transitions, 761 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 19:47:51,285 INFO L231 Difference]: Finished difference. Result has 44 places, 46 transitions, 264 flow [2022-12-13 19:47:51,286 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=264, PETRI_PLACES=44, PETRI_TRANSITIONS=46} [2022-12-13 19:47:51,286 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 10 predicate places. [2022-12-13 19:47:51,286 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 46 transitions, 264 flow [2022-12-13 19:47:51,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 96.85714285714286) internal successors, (678), 7 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:51,287 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:47:51,287 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] [2022-12-13 19:47:51,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 19:47:51,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:47:51,489 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 19:47:51,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:47:51,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1036101536, now seen corresponding path program 1 times [2022-12-13 19:47:51,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:47:51,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093726057] [2022-12-13 19:47:51,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:47:51,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:47:51,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:51,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:51,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:47:51,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093726057] [2022-12-13 19:47:51,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093726057] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:47:51,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385877871] [2022-12-13 19:47:51,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:47:51,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:47:51,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:47:51,636 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:47:51,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 19:47:51,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:51,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 19:47:51,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:47:51,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:51,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:47:51,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:51,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385877871] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:47:51,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:47:51,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-12-13 19:47:51,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675411341] [2022-12-13 19:47:51,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:47:51,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 19:47:51,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:47:51,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 19:47:51,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 19:47:51,973 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 242 [2022-12-13 19:47:51,975 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 46 transitions, 264 flow. Second operand has 6 states, 6 states have (on average 110.66666666666667) internal successors, (664), 6 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:51,975 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:47:51,975 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 242 [2022-12-13 19:47:51,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:47:52,288 INFO L130 PetriNetUnfolder]: 1613/2249 cut-off events. [2022-12-13 19:47:52,288 INFO L131 PetriNetUnfolder]: For 4992/4992 co-relation queries the response was YES. [2022-12-13 19:47:52,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8716 conditions, 2249 events. 1613/2249 cut-off events. For 4992/4992 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8330 event pairs, 351 based on Foata normal form. 90/2339 useless extension candidates. Maximal degree in co-relation 4351. Up to 936 conditions per place. [2022-12-13 19:47:52,301 INFO L137 encePairwiseOnDemand]: 237/242 looper letters, 90 selfloop transitions, 13 changer transitions 0/103 dead transitions. [2022-12-13 19:47:52,301 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 103 transitions, 746 flow [2022-12-13 19:47:52,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:47:52,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:47:52,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 594 transitions. [2022-12-13 19:47:52,303 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2022-12-13 19:47:52,303 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 594 transitions. [2022-12-13 19:47:52,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 594 transitions. [2022-12-13 19:47:52,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:47:52,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 594 transitions. [2022-12-13 19:47:52,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:52,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 242.0) internal successors, (1452), 6 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:52,306 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 242.0) internal successors, (1452), 6 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:52,307 INFO L175 Difference]: Start difference. First operand has 44 places, 46 transitions, 264 flow. Second operand 5 states and 594 transitions. [2022-12-13 19:47:52,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 103 transitions, 746 flow [2022-12-13 19:47:52,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 103 transitions, 729 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-12-13 19:47:52,312 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 317 flow [2022-12-13 19:47:52,312 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=317, PETRI_PLACES=49, PETRI_TRANSITIONS=49} [2022-12-13 19:47:52,313 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 15 predicate places. [2022-12-13 19:47:52,313 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 317 flow [2022-12-13 19:47:52,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 110.66666666666667) internal successors, (664), 6 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:52,313 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:47:52,313 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] [2022-12-13 19:47:52,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 19:47:52,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:47:52,515 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 19:47:52,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:47:52,515 INFO L85 PathProgramCache]: Analyzing trace with hash 174726068, now seen corresponding path program 2 times [2022-12-13 19:47:52,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:47:52,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675569975] [2022-12-13 19:47:52,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:47:52,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:47:52,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:52,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:52,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:47:52,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675569975] [2022-12-13 19:47:52,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675569975] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:47:52,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:47:52,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 19:47:52,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179049378] [2022-12-13 19:47:52,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:47:52,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:47:52,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:47:52,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:47:52,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:47:52,758 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 242 [2022-12-13 19:47:52,759 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 317 flow. Second operand has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:52,759 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:47:52,759 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 242 [2022-12-13 19:47:52,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:47:53,038 INFO L130 PetriNetUnfolder]: 1411/1951 cut-off events. [2022-12-13 19:47:53,038 INFO L131 PetriNetUnfolder]: For 5509/5509 co-relation queries the response was YES. [2022-12-13 19:47:53,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8294 conditions, 1951 events. 1411/1951 cut-off events. For 5509/5509 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7049 event pairs, 83 based on Foata normal form. 34/1971 useless extension candidates. Maximal degree in co-relation 5579. Up to 797 conditions per place. [2022-12-13 19:47:53,049 INFO L137 encePairwiseOnDemand]: 237/242 looper letters, 88 selfloop transitions, 11 changer transitions 2/101 dead transitions. [2022-12-13 19:47:53,049 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 101 transitions, 747 flow [2022-12-13 19:47:53,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:47:53,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:47:53,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 591 transitions. [2022-12-13 19:47:53,051 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4884297520661157 [2022-12-13 19:47:53,051 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 591 transitions. [2022-12-13 19:47:53,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 591 transitions. [2022-12-13 19:47:53,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:47:53,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 591 transitions. [2022-12-13 19:47:53,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.2) internal successors, (591), 5 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:53,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 242.0) internal successors, (1452), 6 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:53,054 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 242.0) internal successors, (1452), 6 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:53,054 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 317 flow. Second operand 5 states and 591 transitions. [2022-12-13 19:47:53,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 101 transitions, 747 flow [2022-12-13 19:47:53,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 101 transitions, 736 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-13 19:47:53,064 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 310 flow [2022-12-13 19:47:53,065 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=310, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2022-12-13 19:47:53,065 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 19 predicate places. [2022-12-13 19:47:53,065 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 310 flow [2022-12-13 19:47:53,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:53,065 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:47:53,065 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] [2022-12-13 19:47:53,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 19:47:53,066 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 19:47:53,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:47:53,066 INFO L85 PathProgramCache]: Analyzing trace with hash -176303485, now seen corresponding path program 2 times [2022-12-13 19:47:53,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:47:53,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618765745] [2022-12-13 19:47:53,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:47:53,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:47:53,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:53,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:53,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:47:53,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618765745] [2022-12-13 19:47:53,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618765745] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:47:53,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828601709] [2022-12-13 19:47:53,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:47:53,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:47:53,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:47:53,174 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:47:53,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 19:47:53,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:47:53,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:47:53,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 19:47:53,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:47:53,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:53,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:47:53,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:53,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828601709] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:47:53,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:47:53,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 19:47:53,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758988211] [2022-12-13 19:47:53,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:47:53,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 19:47:53,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:47:53,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 19:47:53,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-13 19:47:53,589 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 242 [2022-12-13 19:47:53,590 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 310 flow. Second operand has 7 states, 7 states have (on average 100.0) internal successors, (700), 7 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:53,591 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:47:53,591 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 242 [2022-12-13 19:47:53,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:47:53,951 INFO L130 PetriNetUnfolder]: 1663/2287 cut-off events. [2022-12-13 19:47:53,951 INFO L131 PetriNetUnfolder]: For 6714/6714 co-relation queries the response was YES. [2022-12-13 19:47:53,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10200 conditions, 2287 events. 1663/2287 cut-off events. For 6714/6714 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8334 event pairs, 231 based on Foata normal form. 84/2357 useless extension candidates. Maximal degree in co-relation 6036. Up to 1373 conditions per place. [2022-12-13 19:47:53,963 INFO L137 encePairwiseOnDemand]: 235/242 looper letters, 102 selfloop transitions, 12 changer transitions 3/117 dead transitions. [2022-12-13 19:47:53,963 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 117 transitions, 876 flow [2022-12-13 19:47:53,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:47:53,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 19:47:53,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 642 transitions. [2022-12-13 19:47:53,964 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44214876033057854 [2022-12-13 19:47:53,965 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 642 transitions. [2022-12-13 19:47:53,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 642 transitions. [2022-12-13 19:47:53,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:47:53,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 642 transitions. [2022-12-13 19:47:53,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 107.0) internal successors, (642), 6 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:53,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 242.0) internal successors, (1694), 7 states have internal predecessors, (1694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:53,967 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 242.0) internal successors, (1694), 7 states have internal predecessors, (1694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:53,968 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 310 flow. Second operand 6 states and 642 transitions. [2022-12-13 19:47:53,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 117 transitions, 876 flow [2022-12-13 19:47:53,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 117 transitions, 865 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:47:53,975 INFO L231 Difference]: Finished difference. Result has 59 places, 50 transitions, 364 flow [2022-12-13 19:47:53,976 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=364, PETRI_PLACES=59, PETRI_TRANSITIONS=50} [2022-12-13 19:47:53,976 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 25 predicate places. [2022-12-13 19:47:53,976 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 50 transitions, 364 flow [2022-12-13 19:47:53,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 100.0) internal successors, (700), 7 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:53,976 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:47:53,976 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] [2022-12-13 19:47:53,982 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 19:47:54,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:47:54,177 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 19:47:54,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:47:54,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1487791714, now seen corresponding path program 1 times [2022-12-13 19:47:54,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:47:54,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448903602] [2022-12-13 19:47:54,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:47:54,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:47:54,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:54,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:54,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:47:54,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448903602] [2022-12-13 19:47:54,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448903602] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:47:54,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:47:54,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 19:47:54,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445647324] [2022-12-13 19:47:54,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:47:54,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:47:54,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:47:54,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:47:54,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:47:54,399 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 242 [2022-12-13 19:47:54,400 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 50 transitions, 364 flow. Second operand has 4 states, 4 states have (on average 98.5) internal successors, (394), 4 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:54,400 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:47:54,400 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 242 [2022-12-13 19:47:54,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:47:54,694 INFO L130 PetriNetUnfolder]: 1879/2571 cut-off events. [2022-12-13 19:47:54,694 INFO L131 PetriNetUnfolder]: For 8668/8668 co-relation queries the response was YES. [2022-12-13 19:47:54,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12313 conditions, 2571 events. 1879/2571 cut-off events. For 8668/8668 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 9557 event pairs, 317 based on Foata normal form. 68/2639 useless extension candidates. Maximal degree in co-relation 10573. Up to 2135 conditions per place. [2022-12-13 19:47:54,708 INFO L137 encePairwiseOnDemand]: 236/242 looper letters, 83 selfloop transitions, 8 changer transitions 3/94 dead transitions. [2022-12-13 19:47:54,708 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 94 transitions, 817 flow [2022-12-13 19:47:54,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:47:54,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 19:47:54,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 432 transitions. [2022-12-13 19:47:54,709 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4462809917355372 [2022-12-13 19:47:54,709 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 432 transitions. [2022-12-13 19:47:54,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 432 transitions. [2022-12-13 19:47:54,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:47:54,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 432 transitions. [2022-12-13 19:47:54,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:54,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 242.0) internal successors, (1210), 5 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:54,711 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 242.0) internal successors, (1210), 5 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:54,711 INFO L175 Difference]: Start difference. First operand has 59 places, 50 transitions, 364 flow. Second operand 4 states and 432 transitions. [2022-12-13 19:47:54,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 94 transitions, 817 flow [2022-12-13 19:47:54,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 94 transitions, 786 flow, removed 12 selfloop flow, removed 1 redundant places. [2022-12-13 19:47:54,728 INFO L231 Difference]: Finished difference. Result has 62 places, 51 transitions, 373 flow [2022-12-13 19:47:54,728 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=373, PETRI_PLACES=62, PETRI_TRANSITIONS=51} [2022-12-13 19:47:54,728 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 28 predicate places. [2022-12-13 19:47:54,729 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 51 transitions, 373 flow [2022-12-13 19:47:54,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 98.5) internal successors, (394), 4 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:54,729 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:47:54,729 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] [2022-12-13 19:47:54,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 19:47:54,729 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 19:47:54,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:47:54,729 INFO L85 PathProgramCache]: Analyzing trace with hash 598812185, now seen corresponding path program 1 times [2022-12-13 19:47:54,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:47:54,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820184990] [2022-12-13 19:47:54,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:47:54,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:47:54,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:55,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:55,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:47:55,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820184990] [2022-12-13 19:47:55,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820184990] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:47:55,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642471296] [2022-12-13 19:47:55,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:47:55,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:47:55,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:47:55,069 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:47:55,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 19:47:55,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:55,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 19:47:55,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:48:05,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:48:05,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:48:15,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:48:15,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642471296] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:48:15,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:48:15,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2022-12-13 19:48:15,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242092336] [2022-12-13 19:48:15,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:48:15,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 19:48:15,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:48:15,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 19:48:15,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=111, Unknown=6, NotChecked=0, Total=156 [2022-12-13 19:48:17,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:48:19,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:48:21,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:48:24,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:48:28,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:48:31,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:48:31,338 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 242 [2022-12-13 19:48:31,338 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 51 transitions, 373 flow. Second operand has 13 states, 13 states have (on average 90.6923076923077) internal successors, (1179), 13 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:48:31,338 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:48:31,338 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 242 [2022-12-13 19:48:31,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:48:33,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:48:35,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:48:38,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:48:40,947 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:48:42,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:48:47,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:48:48,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:48:53,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:48:55,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:48:58,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:49:00,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:49:02,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:49:04,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:49:07,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:49:10,467 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:49:12,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:49:14,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:49:16,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:49:19,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:49:21,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:49:23,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:49:25,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:49:27,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:49:29,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:49:31,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:49:34,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:49:36,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:49:38,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:49:40,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:49:42,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:49:44,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:49:47,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:49:48,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:49:51,467 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:49:52,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:49:54,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:49:56,667 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:49:58,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:50:00,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:50:02,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:50:05,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:50:07,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:50:09,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:50:11,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:50:13,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:50:15,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:50:17,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:50:20,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:50:22,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:50:25,154 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:50:26,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:50:29,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:50:31,420 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:50:32,418 INFO L130 PetriNetUnfolder]: 2947/4094 cut-off events. [2022-12-13 19:50:32,418 INFO L131 PetriNetUnfolder]: For 13629/13629 co-relation queries the response was YES. [2022-12-13 19:50:32,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19294 conditions, 4094 events. 2947/4094 cut-off events. For 13629/13629 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 17341 event pairs, 288 based on Foata normal form. 2/4096 useless extension candidates. Maximal degree in co-relation 17758. Up to 2675 conditions per place. [2022-12-13 19:50:32,444 INFO L137 encePairwiseOnDemand]: 228/242 looper letters, 172 selfloop transitions, 46 changer transitions 9/227 dead transitions. [2022-12-13 19:50:32,444 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 227 transitions, 1701 flow [2022-12-13 19:50:32,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 19:50:32,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 19:50:32,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1134 transitions. [2022-12-13 19:50:32,446 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4259954921111946 [2022-12-13 19:50:32,446 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1134 transitions. [2022-12-13 19:50:32,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1134 transitions. [2022-12-13 19:50:32,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:50:32,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1134 transitions. [2022-12-13 19:50:32,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 103.0909090909091) internal successors, (1134), 11 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:50:32,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 242.0) internal successors, (2904), 12 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:50:32,451 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 242.0) internal successors, (2904), 12 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:50:32,451 INFO L175 Difference]: Start difference. First operand has 62 places, 51 transitions, 373 flow. Second operand 11 states and 1134 transitions. [2022-12-13 19:50:32,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 227 transitions, 1701 flow [2022-12-13 19:50:32,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 227 transitions, 1678 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-12-13 19:50:32,466 INFO L231 Difference]: Finished difference. Result has 75 places, 90 transitions, 860 flow [2022-12-13 19:50:32,466 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=860, PETRI_PLACES=75, PETRI_TRANSITIONS=90} [2022-12-13 19:50:32,467 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 41 predicate places. [2022-12-13 19:50:32,467 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 90 transitions, 860 flow [2022-12-13 19:50:32,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 90.6923076923077) internal successors, (1179), 13 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:50:32,467 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:50:32,467 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] [2022-12-13 19:50:32,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 19:50:32,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-13 19:50:32,669 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 19:50:32,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:50:32,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1584624040, now seen corresponding path program 1 times [2022-12-13 19:50:32,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:50:32,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203130259] [2022-12-13 19:50:32,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:50:32,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:50:32,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:51:22,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:51:22,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:51:22,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203130259] [2022-12-13 19:51:22,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203130259] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:51:22,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827838143] [2022-12-13 19:51:22,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:51:22,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:51:22,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:51:22,169 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:51:22,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 19:53:25,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:53:25,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 19:53:25,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:54:10,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:54:10,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:54:20,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:54:20,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827838143] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:54:20,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:54:20,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 5] total 14 [2022-12-13 19:54:20,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991631201] [2022-12-13 19:54:20,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:54:20,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 19:54:20,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:54:20,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 19:54:20,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=165, Unknown=15, NotChecked=0, Total=240 [2022-12-13 19:54:22,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:54:25,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:54:27,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:54:27,886 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 242 [2022-12-13 19:54:27,886 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 90 transitions, 860 flow. Second operand has 16 states, 16 states have (on average 90.0625) internal successors, (1441), 16 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:54:27,886 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:54:27,887 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 242 [2022-12-13 19:54:27,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:54:30,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:54:50,605 WARN L233 SmtUtils]: Spent 13.45s on a formula simplification. DAG size of input: 63 DAG size of output: 31 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 19:55:11,202 WARN L233 SmtUtils]: Spent 17.29s on a formula simplification. DAG size of input: 65 DAG size of output: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 19:55:13,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:56:08,138 WARN L233 SmtUtils]: Spent 49.93s on a formula simplification. DAG size of input: 75 DAG size of output: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 19:56:10,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:56:12,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:56:19,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:56:21,250 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:56:23,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:56:25,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:56:27,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:56:30,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:56:33,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:56:35,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:56:38,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:56:39,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:56:41,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:56:52,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:56:55,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:56:57,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:56:59,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:57:03,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:57:05,313 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:57:11,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:57:14,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:57:28,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:57:30,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:57:33,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:57:36,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:57:40,415 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:57:47,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:57:49,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:57:51,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:57:54,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:58:04,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:58:05,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:58:08,430 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:58:30,203 WARN L233 SmtUtils]: Spent 13.42s on a formula simplification. DAG size of input: 70 DAG size of output: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 19:58:32,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:58:43,280 WARN L233 SmtUtils]: Spent 6.18s on a formula simplification. DAG size of input: 69 DAG size of output: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 19:58:47,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:58:51,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:58:53,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:58:55,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:58:59,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:59:01,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:59:03,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:59:05,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:59:07,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:59:09,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:59:11,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:59:13,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:59:15,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:59:19,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:59:21,930 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:59:25,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:59:29,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:59:33,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:59:35,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:59:37,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:59:40,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:59:40,157 INFO L130 PetriNetUnfolder]: 4522/6333 cut-off events. [2022-12-13 19:59:40,157 INFO L131 PetriNetUnfolder]: For 26827/26827 co-relation queries the response was YES. [2022-12-13 19:59:40,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33041 conditions, 6333 events. 4522/6333 cut-off events. For 26827/26827 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 29201 event pairs, 331 based on Foata normal form. 19/6352 useless extension candidates. Maximal degree in co-relation 31029. Up to 4304 conditions per place. [2022-12-13 19:59:40,184 INFO L137 encePairwiseOnDemand]: 229/242 looper letters, 272 selfloop transitions, 95 changer transitions 18/385 dead transitions. [2022-12-13 19:59:40,184 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 385 transitions, 3419 flow [2022-12-13 19:59:40,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 19:59:40,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 19:59:40,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2112 transitions. [2022-12-13 19:59:40,188 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2022-12-13 19:59:40,188 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2112 transitions. [2022-12-13 19:59:40,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2112 transitions. [2022-12-13 19:59:40,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:59:40,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2112 transitions. [2022-12-13 19:59:40,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 100.57142857142857) internal successors, (2112), 21 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:59:40,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 242.0) internal successors, (5324), 22 states have internal predecessors, (5324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:59:40,195 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 242.0) internal successors, (5324), 22 states have internal predecessors, (5324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:59:40,195 INFO L175 Difference]: Start difference. First operand has 75 places, 90 transitions, 860 flow. Second operand 21 states and 2112 transitions. [2022-12-13 19:59:40,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 385 transitions, 3419 flow [2022-12-13 19:59:40,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 385 transitions, 3356 flow, removed 28 selfloop flow, removed 1 redundant places. [2022-12-13 19:59:40,248 INFO L231 Difference]: Finished difference. Result has 108 places, 181 transitions, 1965 flow [2022-12-13 19:59:40,249 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=797, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1965, PETRI_PLACES=108, PETRI_TRANSITIONS=181} [2022-12-13 19:59:40,249 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 74 predicate places. [2022-12-13 19:59:40,249 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 181 transitions, 1965 flow [2022-12-13 19:59:40,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 90.0625) internal successors, (1441), 16 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:59:40,249 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:59:40,250 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] [2022-12-13 19:59:40,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 19:59:40,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:59:40,452 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 19:59:40,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:59:40,453 INFO L85 PathProgramCache]: Analyzing trace with hash -342057358, now seen corresponding path program 2 times [2022-12-13 19:59:40,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:59:40,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825296475] [2022-12-13 19:59:40,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:59:40,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:59:40,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:59:41,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:59:41,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:59:41,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825296475] [2022-12-13 19:59:41,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825296475] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:59:41,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090033507] [2022-12-13 19:59:41,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:59:41,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:59:41,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:59:41,056 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:59:41,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 19:59:42,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:59:42,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:59:42,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 19:59:42,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:59:48,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:59:48,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:59:48,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:59:48,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090033507] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:59:48,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:59:48,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 10 [2022-12-13 19:59:48,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299023978] [2022-12-13 19:59:48,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:59:48,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 19:59:48,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:59:48,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 19:59:48,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-12-13 19:59:50,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:59:52,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:59:55,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:59:58,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:59:58,793 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 242 [2022-12-13 19:59:58,794 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 181 transitions, 1965 flow. Second operand has 12 states, 12 states have (on average 96.41666666666667) internal successors, (1157), 12 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:59:58,794 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:59:58,794 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 242 [2022-12-13 19:59:58,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:00:05,957 WARN L233 SmtUtils]: Spent 6.88s on a formula simplification. DAG size of input: 62 DAG size of output: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:00:09,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 20:00:12,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 20:00:14,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 20:00:16,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 20:00:18,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 20:00:20,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 20:00:23,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 20:00:25,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 20:00:27,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 20:00:29,792 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 20:00:33,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 20:00:35,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 20:00:37,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 20:00:39,581 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 20:00:42,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:00:44,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 20:00:46,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 20:00:48,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 20:00:51,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:00:54,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:00:56,165 INFO L130 PetriNetUnfolder]: 5006/7019 cut-off events. [2022-12-13 20:00:56,165 INFO L131 PetriNetUnfolder]: For 50265/50265 co-relation queries the response was YES. [2022-12-13 20:00:56,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43479 conditions, 7019 events. 5006/7019 cut-off events. For 50265/50265 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 32742 event pairs, 517 based on Foata normal form. 2/7021 useless extension candidates. Maximal degree in co-relation 42709. Up to 5548 conditions per place. [2022-12-13 20:00:56,201 INFO L137 encePairwiseOnDemand]: 236/242 looper letters, 210 selfloop transitions, 66 changer transitions 7/283 dead transitions. [2022-12-13 20:00:56,201 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 283 transitions, 3375 flow [2022-12-13 20:00:56,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 20:00:56,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 20:00:56,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 751 transitions. [2022-12-13 20:00:56,203 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4433293978748524 [2022-12-13 20:00:56,203 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 751 transitions. [2022-12-13 20:00:56,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 751 transitions. [2022-12-13 20:00:56,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:00:56,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 751 transitions. [2022-12-13 20:00:56,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 107.28571428571429) internal successors, (751), 7 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:00:56,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 242.0) internal successors, (1936), 8 states have internal predecessors, (1936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:00:56,206 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 242.0) internal successors, (1936), 8 states have internal predecessors, (1936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:00:56,206 INFO L175 Difference]: Start difference. First operand has 108 places, 181 transitions, 1965 flow. Second operand 7 states and 751 transitions. [2022-12-13 20:00:56,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 283 transitions, 3375 flow [2022-12-13 20:00:56,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 283 transitions, 3020 flow, removed 174 selfloop flow, removed 1 redundant places. [2022-12-13 20:00:56,367 INFO L231 Difference]: Finished difference. Result has 116 places, 211 transitions, 2203 flow [2022-12-13 20:00:56,368 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=1680, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2203, PETRI_PLACES=116, PETRI_TRANSITIONS=211} [2022-12-13 20:00:56,368 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 82 predicate places. [2022-12-13 20:00:56,368 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 211 transitions, 2203 flow [2022-12-13 20:00:56,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 96.41666666666667) internal successors, (1157), 12 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:00:56,369 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:00:56,369 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] [2022-12-13 20:00:56,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 20:00:56,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:00:56,570 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 20:00:56,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:00:56,571 INFO L85 PathProgramCache]: Analyzing trace with hash 485543666, now seen corresponding path program 3 times [2022-12-13 20:00:56,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:00:56,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464559743] [2022-12-13 20:00:56,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:00:56,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:00:56,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:00:57,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:00:57,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:00:57,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464559743] [2022-12-13 20:00:57,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464559743] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:00:57,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680811429] [2022-12-13 20:00:57,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 20:00:57,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:00:57,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:00:57,008 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:00:57,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da503b3a-5d71-4762-9ec0-14e9493bfb08/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 20:01:54,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 20:01:54,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:01:54,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 20:01:54,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:02:26,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:02:26,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:02:31,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:02:31,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680811429] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:02:31,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:02:31,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2022-12-13 20:02:31,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332797590] [2022-12-13 20:02:31,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:02:31,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 20:02:31,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:02:31,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 20:02:31,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=157, Unknown=10, NotChecked=0, Total=240 [2022-12-13 20:02:33,704 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 20:02:36,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 20:02:38,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []