./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e4c79b7a5b8db7237eb9e98d6143d48d2d4ec5b8465b95c5ccb44c5e387749db --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 20:00:34,680 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:00:34,685 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:00:34,727 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:00:34,730 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:00:34,732 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:00:34,736 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:00:34,739 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:00:34,742 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:00:34,747 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:00:34,749 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:00:34,750 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:00:34,752 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:00:34,756 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:00:34,757 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:00:34,759 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:00:34,761 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:00:34,769 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:00:34,770 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:00:34,772 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:00:34,777 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:00:34,778 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:00:34,779 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:00:34,781 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:00:34,785 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:00:34,788 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:00:34,789 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:00:34,790 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:00:34,792 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:00:34,793 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:00:34,794 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:00:34,795 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:00:34,797 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:00:34,799 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:00:34,800 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:00:34,800 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:00:34,801 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:00:34,801 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:00:34,801 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:00:34,802 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:00:34,803 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:00:34,804 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 20:00:34,851 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:00:34,851 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:00:34,852 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:00:34,852 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:00:34,853 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:00:34,853 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:00:34,854 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:00:34,854 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:00:34,855 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:00:34,855 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:00:34,856 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:00:34,856 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:00:34,857 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:00:34,857 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:00:34,857 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:00:34,857 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:00:34,858 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:00:34,858 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:00:34,858 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:00:34,858 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:00:34,859 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:00:34,859 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:00:34,859 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:00:34,859 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:00:34,860 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:00:34,860 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:00:34,862 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:00:34,862 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:00:34,862 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:00:34,862 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:00:34,863 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:00:34,863 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:00:34,863 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:00:34,863 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4c79b7a5b8db7237eb9e98d6143d48d2d4ec5b8465b95c5ccb44c5e387749db [2022-11-18 20:00:35,169 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:00:35,192 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:00:35,195 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:00:35,197 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:00:35,198 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:00:35,199 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2022-11-18 20:00:35,270 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/data/8d255787d/3e1a61965c704db8bb7fd55f5a1b1187/FLAG2072db51d [2022-11-18 20:00:35,787 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:00:35,791 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2022-11-18 20:00:35,800 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/data/8d255787d/3e1a61965c704db8bb7fd55f5a1b1187/FLAG2072db51d [2022-11-18 20:00:36,147 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/data/8d255787d/3e1a61965c704db8bb7fd55f5a1b1187 [2022-11-18 20:00:36,152 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:00:36,154 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:00:36,156 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:00:36,156 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:00:36,160 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:00:36,161 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:00:36" (1/1) ... [2022-11-18 20:00:36,162 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b3109f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:00:36, skipping insertion in model container [2022-11-18 20:00:36,162 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:00:36" (1/1) ... [2022-11-18 20:00:36,170 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:00:36,185 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:00:36,400 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c[2476,2489] [2022-11-18 20:00:36,405 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:00:36,413 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:00:36,435 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c[2476,2489] [2022-11-18 20:00:36,436 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:00:36,450 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:00:36,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:00:36 WrapperNode [2022-11-18 20:00:36,451 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:00:36,452 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:00:36,452 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:00:36,452 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:00:36,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:00:36" (1/1) ... [2022-11-18 20:00:36,468 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:00:36" (1/1) ... [2022-11-18 20:00:36,486 INFO L138 Inliner]: procedures = 21, calls = 34, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 59 [2022-11-18 20:00:36,487 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:00:36,488 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:00:36,488 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:00:36,488 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:00:36,497 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:00:36" (1/1) ... [2022-11-18 20:00:36,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:00:36" (1/1) ... [2022-11-18 20:00:36,499 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:00:36" (1/1) ... [2022-11-18 20:00:36,500 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:00:36" (1/1) ... [2022-11-18 20:00:36,505 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:00:36" (1/1) ... [2022-11-18 20:00:36,509 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:00:36" (1/1) ... [2022-11-18 20:00:36,510 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:00:36" (1/1) ... [2022-11-18 20:00:36,511 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:00:36" (1/1) ... [2022-11-18 20:00:36,514 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:00:36,515 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:00:36,515 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:00:36,515 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:00:36,529 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:00:36" (1/1) ... [2022-11-18 20:00:36,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:00:36,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:00:36,562 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:00:36,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:00:36,597 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:00:36,597 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-18 20:00:36,597 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-18 20:00:36,597 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-18 20:00:36,597 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-18 20:00:36,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:00:36,598 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:00:36,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:00:36,598 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-18 20:00:36,598 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-18 20:00:36,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:00:36,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:00:36,599 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 20:00:36,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:00:36,601 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 20:00:36,771 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:00:36,787 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:00:37,051 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:00:37,094 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:00:37,094 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-18 20:00:37,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:00:37 BoogieIcfgContainer [2022-11-18 20:00:37,097 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:00:37,099 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:00:37,099 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:00:37,103 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:00:37,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:00:36" (1/3) ... [2022-11-18 20:00:37,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21311674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:00:37, skipping insertion in model container [2022-11-18 20:00:37,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:00:36" (2/3) ... [2022-11-18 20:00:37,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21311674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:00:37, skipping insertion in model container [2022-11-18 20:00:37,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:00:37" (3/3) ... [2022-11-18 20:00:37,106 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-threaded-sum-2.wvr.c [2022-11-18 20:00:37,115 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 20:00:37,125 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:00:37,126 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 20:00:37,126 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 20:00:37,186 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-18 20:00:37,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 88 transitions, 192 flow [2022-11-18 20:00:37,351 INFO L130 PetriNetUnfolder]: 6/86 cut-off events. [2022-11-18 20:00:37,354 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 20:00:37,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 86 events. 6/86 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 41 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2022-11-18 20:00:37,361 INFO L82 GeneralOperation]: Start removeDead. Operand has 89 places, 88 transitions, 192 flow [2022-11-18 20:00:37,366 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 77 transitions, 166 flow [2022-11-18 20:00:37,388 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:00:37,397 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;@23f1d4ab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:00:37,398 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-18 20:00:37,444 INFO L130 PetriNetUnfolder]: 6/76 cut-off events. [2022-11-18 20:00:37,445 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 20:00:37,445 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:00:37,446 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:00:37,447 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:00:37,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:00:37,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1497935551, now seen corresponding path program 1 times [2022-11-18 20:00:37,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:00:37,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453477880] [2022-11-18 20:00:37,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:37,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:00:37,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:00:37,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:00:37,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:00:37,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453477880] [2022-11-18 20:00:37,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453477880] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:00:37,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:00:37,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:00:37,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380125842] [2022-11-18 20:00:37,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:00:37,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 20:00:37,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:00:37,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 20:00:37,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:00:37,845 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 88 [2022-11-18 20:00:37,849 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 77 transitions, 166 flow. Second operand has 2 states, 2 states have (on average 79.0) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:37,849 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:00:37,849 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 88 [2022-11-18 20:00:37,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:00:37,925 INFO L130 PetriNetUnfolder]: 16/112 cut-off events. [2022-11-18 20:00:37,927 INFO L131 PetriNetUnfolder]: For 27/28 co-relation queries the response was YES. [2022-11-18 20:00:37,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 112 events. 16/112 cut-off events. For 27/28 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 176 event pairs, 5 based on Foata normal form. 14/115 useless extension candidates. Maximal degree in co-relation 82. Up to 27 conditions per place. [2022-11-18 20:00:37,931 INFO L137 encePairwiseOnDemand]: 84/88 looper letters, 7 selfloop transitions, 0 changer transitions 2/73 dead transitions. [2022-11-18 20:00:37,931 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 73 transitions, 172 flow [2022-11-18 20:00:37,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 20:00:37,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 20:00:37,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 163 transitions. [2022-11-18 20:00:37,950 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9261363636363636 [2022-11-18 20:00:37,951 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 163 transitions. [2022-11-18 20:00:37,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 163 transitions. [2022-11-18 20:00:37,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:00:37,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 163 transitions. [2022-11-18 20:00:37,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 81.5) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:37,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:37,974 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:37,976 INFO L175 Difference]: Start difference. First operand has 78 places, 77 transitions, 166 flow. Second operand 2 states and 163 transitions. [2022-11-18 20:00:37,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 73 transitions, 172 flow [2022-11-18 20:00:37,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 73 transitions, 164 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-18 20:00:37,990 INFO L231 Difference]: Finished difference. Result has 75 places, 71 transitions, 146 flow [2022-11-18 20:00:37,992 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=146, PETRI_PLACES=75, PETRI_TRANSITIONS=71} [2022-11-18 20:00:37,997 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, -3 predicate places. [2022-11-18 20:00:37,998 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 71 transitions, 146 flow [2022-11-18 20:00:37,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 79.0) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:37,998 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:00:37,999 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:00:37,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:00:37,999 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:00:38,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:00:38,000 INFO L85 PathProgramCache]: Analyzing trace with hash 855667735, now seen corresponding path program 1 times [2022-11-18 20:00:38,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:00:38,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881094742] [2022-11-18 20:00:38,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:38,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:00:38,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:00:38,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:00:38,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:00:38,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881094742] [2022-11-18 20:00:38,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881094742] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:00:38,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:00:38,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 20:00:38,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702501942] [2022-11-18 20:00:38,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:00:38,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:00:38,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:00:38,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:00:38,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:00:38,659 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 88 [2022-11-18 20:00:38,660 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 146 flow. Second operand has 6 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:38,660 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:00:38,660 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 88 [2022-11-18 20:00:38,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:00:38,872 INFO L130 PetriNetUnfolder]: 44/170 cut-off events. [2022-11-18 20:00:38,873 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-18 20:00:38,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 170 events. 44/170 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 420 event pairs, 10 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 274. Up to 49 conditions per place. [2022-11-18 20:00:38,875 INFO L137 encePairwiseOnDemand]: 81/88 looper letters, 33 selfloop transitions, 7 changer transitions 0/87 dead transitions. [2022-11-18 20:00:38,875 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 87 transitions, 259 flow [2022-11-18 20:00:38,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:00:38,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 20:00:38,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 441 transitions. [2022-11-18 20:00:38,882 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7159090909090909 [2022-11-18 20:00:38,882 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 441 transitions. [2022-11-18 20:00:38,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 441 transitions. [2022-11-18 20:00:38,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:00:38,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 441 transitions. [2022-11-18 20:00:38,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 63.0) internal successors, (441), 7 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:38,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:38,889 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:38,890 INFO L175 Difference]: Start difference. First operand has 75 places, 71 transitions, 146 flow. Second operand 7 states and 441 transitions. [2022-11-18 20:00:38,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 87 transitions, 259 flow [2022-11-18 20:00:38,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 87 transitions, 259 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 20:00:38,892 INFO L231 Difference]: Finished difference. Result has 82 places, 75 transitions, 187 flow [2022-11-18 20:00:38,893 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=187, PETRI_PLACES=82, PETRI_TRANSITIONS=75} [2022-11-18 20:00:38,893 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 4 predicate places. [2022-11-18 20:00:38,894 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 75 transitions, 187 flow [2022-11-18 20:00:38,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:38,894 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:00:38,894 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:00:38,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:00:38,895 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:00:38,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:00:38,895 INFO L85 PathProgramCache]: Analyzing trace with hash 251417684, now seen corresponding path program 1 times [2022-11-18 20:00:38,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:00:38,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330771949] [2022-11-18 20:00:38,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:38,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:00:38,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:00:40,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:00:40,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:00:40,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330771949] [2022-11-18 20:00:40,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330771949] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:00:40,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420863577] [2022-11-18 20:00:40,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:40,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:00:40,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:00:40,549 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:00:40,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:00:40,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:00:40,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-18 20:00:40,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:00:41,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:00:41,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:00:42,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:00:42,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420863577] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:00:42,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:00:42,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [13, 15] total 31 [2022-11-18 20:00:42,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060475107] [2022-11-18 20:00:42,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:00:42,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:00:42,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:00:42,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:00:42,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2022-11-18 20:00:42,997 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-11-18 20:00:42,999 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 75 transitions, 187 flow. Second operand has 14 states, 14 states have (on average 51.07142857142857) internal successors, (715), 14 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:42,999 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:00:42,999 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-11-18 20:00:42,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:00:44,970 INFO L130 PetriNetUnfolder]: 210/631 cut-off events. [2022-11-18 20:00:44,970 INFO L131 PetriNetUnfolder]: For 183/183 co-relation queries the response was YES. [2022-11-18 20:00:44,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1303 conditions, 631 events. 210/631 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3206 event pairs, 31 based on Foata normal form. 1/585 useless extension candidates. Maximal degree in co-relation 1296. Up to 99 conditions per place. [2022-11-18 20:00:44,982 INFO L137 encePairwiseOnDemand]: 67/88 looper letters, 92 selfloop transitions, 57 changer transitions 16/204 dead transitions. [2022-11-18 20:00:44,984 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 204 transitions, 915 flow [2022-11-18 20:00:44,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-18 20:00:44,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-18 20:00:44,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1525 transitions. [2022-11-18 20:00:44,992 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6189123376623377 [2022-11-18 20:00:44,992 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1525 transitions. [2022-11-18 20:00:44,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1525 transitions. [2022-11-18 20:00:44,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:00:44,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1525 transitions. [2022-11-18 20:00:44,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 54.464285714285715) internal successors, (1525), 28 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:45,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 88.0) internal successors, (2552), 29 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:45,007 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 88.0) internal successors, (2552), 29 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:45,007 INFO L175 Difference]: Start difference. First operand has 82 places, 75 transitions, 187 flow. Second operand 28 states and 1525 transitions. [2022-11-18 20:00:45,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 204 transitions, 915 flow [2022-11-18 20:00:45,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 204 transitions, 901 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-18 20:00:45,017 INFO L231 Difference]: Finished difference. Result has 115 places, 125 transitions, 521 flow [2022-11-18 20:00:45,018 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=521, PETRI_PLACES=115, PETRI_TRANSITIONS=125} [2022-11-18 20:00:45,021 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 37 predicate places. [2022-11-18 20:00:45,021 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 125 transitions, 521 flow [2022-11-18 20:00:45,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 51.07142857142857) internal successors, (715), 14 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:45,022 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:00:45,022 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:00:45,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:00:45,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:00:45,229 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:00:45,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:00:45,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1002934387, now seen corresponding path program 1 times [2022-11-18 20:00:45,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:00:45,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261401448] [2022-11-18 20:00:45,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:45,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:00:45,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:00:46,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:00:46,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:00:46,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261401448] [2022-11-18 20:00:46,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261401448] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:00:46,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21117575] [2022-11-18 20:00:46,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:46,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:00:46,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:00:46,560 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:00:46,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:00:46,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:00:46,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-18 20:00:46,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:00:48,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:00:48,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:00:51,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:00:51,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21117575] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:00:51,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:00:51,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-11-18 20:00:51,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124675153] [2022-11-18 20:00:51,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:00:51,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-18 20:00:51,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:00:51,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-18 20:00:51,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1088, Unknown=0, NotChecked=0, Total=1332 [2022-11-18 20:00:51,076 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 88 [2022-11-18 20:00:51,079 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 125 transitions, 521 flow. Second operand has 37 states, 37 states have (on average 52.91891891891892) internal successors, (1958), 37 states have internal predecessors, (1958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:51,079 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:00:51,079 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 88 [2022-11-18 20:00:51,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:01:10,191 INFO L130 PetriNetUnfolder]: 504/1809 cut-off events. [2022-11-18 20:01:10,192 INFO L131 PetriNetUnfolder]: For 2158/2183 co-relation queries the response was YES. [2022-11-18 20:01:10,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4704 conditions, 1809 events. 504/1809 cut-off events. For 2158/2183 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14562 event pairs, 10 based on Foata normal form. 29/1832 useless extension candidates. Maximal degree in co-relation 4688. Up to 168 conditions per place. [2022-11-18 20:01:10,208 INFO L137 encePairwiseOnDemand]: 68/88 looper letters, 217 selfloop transitions, 185 changer transitions 133/583 dead transitions. [2022-11-18 20:01:10,208 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 583 transitions, 3865 flow [2022-11-18 20:01:10,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-11-18 20:01:10,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2022-11-18 20:01:10,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 5779 transitions. [2022-11-18 20:01:10,224 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6254329004329005 [2022-11-18 20:01:10,225 INFO L72 ComplementDD]: Start complementDD. Operand 105 states and 5779 transitions. [2022-11-18 20:01:10,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 5779 transitions. [2022-11-18 20:01:10,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:01:10,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 105 states and 5779 transitions. [2022-11-18 20:01:10,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 106 states, 105 states have (on average 55.03809523809524) internal successors, (5779), 105 states have internal predecessors, (5779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:01:10,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 106 states, 106 states have (on average 88.0) internal successors, (9328), 106 states have internal predecessors, (9328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:01:10,277 INFO L81 ComplementDD]: Finished complementDD. Result has 106 states, 106 states have (on average 88.0) internal successors, (9328), 106 states have internal predecessors, (9328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:01:10,277 INFO L175 Difference]: Start difference. First operand has 115 places, 125 transitions, 521 flow. Second operand 105 states and 5779 transitions. [2022-11-18 20:01:10,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 583 transitions, 3865 flow [2022-11-18 20:01:10,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 583 transitions, 3681 flow, removed 86 selfloop flow, removed 9 redundant places. [2022-11-18 20:01:10,324 INFO L231 Difference]: Finished difference. Result has 265 places, 284 transitions, 2200 flow [2022-11-18 20:01:10,325 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=105, PETRI_FLOW=2200, PETRI_PLACES=265, PETRI_TRANSITIONS=284} [2022-11-18 20:01:10,327 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 187 predicate places. [2022-11-18 20:01:10,327 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 284 transitions, 2200 flow [2022-11-18 20:01:10,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 52.91891891891892) internal successors, (1958), 37 states have internal predecessors, (1958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:01:10,329 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:01:10,329 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:01:10,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:01:10,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:01:10,536 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:01:10,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:01:10,537 INFO L85 PathProgramCache]: Analyzing trace with hash -295658065, now seen corresponding path program 2 times [2022-11-18 20:01:10,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:01:10,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680760097] [2022-11-18 20:01:10,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:01:10,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:01:10,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:01:10,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:01:10,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:01:10,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680760097] [2022-11-18 20:01:10,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680760097] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:01:10,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:01:10,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 20:01:10,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413216053] [2022-11-18 20:01:10,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:01:10,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:01:10,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:01:10,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:01:10,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:01:10,845 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 88 [2022-11-18 20:01:10,846 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 284 transitions, 2200 flow. Second operand has 5 states, 5 states have (on average 68.0) internal successors, (340), 5 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:01:10,846 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:01:10,846 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 88 [2022-11-18 20:01:10,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:01:11,682 INFO L130 PetriNetUnfolder]: 849/2196 cut-off events. [2022-11-18 20:01:11,683 INFO L131 PetriNetUnfolder]: For 11078/11078 co-relation queries the response was YES. [2022-11-18 20:01:11,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8890 conditions, 2196 events. 849/2196 cut-off events. For 11078/11078 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 15822 event pairs, 22 based on Foata normal form. 31/2218 useless extension candidates. Maximal degree in co-relation 8819. Up to 444 conditions per place. [2022-11-18 20:01:11,828 INFO L137 encePairwiseOnDemand]: 81/88 looper letters, 440 selfloop transitions, 142 changer transitions 0/634 dead transitions. [2022-11-18 20:01:11,829 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 634 transitions, 6370 flow [2022-11-18 20:01:11,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:01:11,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 20:01:11,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 496 transitions. [2022-11-18 20:01:11,831 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8051948051948052 [2022-11-18 20:01:11,831 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 496 transitions. [2022-11-18 20:01:11,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 496 transitions. [2022-11-18 20:01:11,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:01:11,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 496 transitions. [2022-11-18 20:01:11,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 70.85714285714286) internal successors, (496), 7 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:01:11,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:01:11,835 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:01:11,836 INFO L175 Difference]: Start difference. First operand has 265 places, 284 transitions, 2200 flow. Second operand 7 states and 496 transitions. [2022-11-18 20:01:11,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 634 transitions, 6370 flow [2022-11-18 20:01:11,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 634 transitions, 5754 flow, removed 300 selfloop flow, removed 50 redundant places. [2022-11-18 20:01:11,996 INFO L231 Difference]: Finished difference. Result has 174 places, 372 transitions, 3281 flow [2022-11-18 20:01:11,997 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=1821, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3281, PETRI_PLACES=174, PETRI_TRANSITIONS=372} [2022-11-18 20:01:12,000 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 96 predicate places. [2022-11-18 20:01:12,000 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 372 transitions, 3281 flow [2022-11-18 20:01:12,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 68.0) internal successors, (340), 5 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:01:12,001 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:01:12,001 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:01:12,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 20:01:12,007 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:01:12,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:01:12,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1117041980, now seen corresponding path program 2 times [2022-11-18 20:01:12,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:01:12,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738926633] [2022-11-18 20:01:12,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:01:12,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:01:12,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:01:14,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:01:14,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:01:14,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738926633] [2022-11-18 20:01:14,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738926633] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:01:14,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346703267] [2022-11-18 20:01:14,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:01:14,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:01:14,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:01:14,391 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:01:14,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:01:14,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:01:14,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:01:14,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-18 20:01:14,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:01:15,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:01:15,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:01:21,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:01:21,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346703267] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:01:21,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:01:21,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 36 [2022-11-18 20:01:21,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541891444] [2022-11-18 20:01:21,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:01:21,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-18 20:01:21,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:01:21,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-18 20:01:21,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1051, Unknown=0, NotChecked=0, Total=1260 [2022-11-18 20:01:21,737 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 88 [2022-11-18 20:01:21,758 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 372 transitions, 3281 flow. Second operand has 36 states, 36 states have (on average 53.22222222222222) internal successors, (1916), 36 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:01:21,758 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:01:21,758 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 88 [2022-11-18 20:01:21,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:01:30,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 20:01:47,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 20:01:50,946 INFO L130 PetriNetUnfolder]: 1169/3280 cut-off events. [2022-11-18 20:01:50,946 INFO L131 PetriNetUnfolder]: For 12271/12303 co-relation queries the response was YES. [2022-11-18 20:01:50,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13505 conditions, 3280 events. 1169/3280 cut-off events. For 12271/12303 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 27114 event pairs, 19 based on Foata normal form. 25/3293 useless extension candidates. Maximal degree in co-relation 13473. Up to 705 conditions per place. [2022-11-18 20:01:50,983 INFO L137 encePairwiseOnDemand]: 67/88 looper letters, 398 selfloop transitions, 355 changer transitions 60/862 dead transitions. [2022-11-18 20:01:50,983 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 862 transitions, 9188 flow [2022-11-18 20:01:50,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-11-18 20:01:50,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2022-11-18 20:01:50,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 4285 transitions. [2022-11-18 20:01:51,001 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6242715617715617 [2022-11-18 20:01:51,001 INFO L72 ComplementDD]: Start complementDD. Operand 78 states and 4285 transitions. [2022-11-18 20:01:51,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 78 states and 4285 transitions. [2022-11-18 20:01:51,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:01:51,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 78 states and 4285 transitions. [2022-11-18 20:01:51,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 79 states, 78 states have (on average 54.93589743589744) internal successors, (4285), 78 states have internal predecessors, (4285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:01:51,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 79 states, 79 states have (on average 88.0) internal successors, (6952), 79 states have internal predecessors, (6952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:01:51,031 INFO L81 ComplementDD]: Finished complementDD. Result has 79 states, 79 states have (on average 88.0) internal successors, (6952), 79 states have internal predecessors, (6952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:01:51,031 INFO L175 Difference]: Start difference. First operand has 174 places, 372 transitions, 3281 flow. Second operand 78 states and 4285 transitions. [2022-11-18 20:01:51,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 862 transitions, 9188 flow [2022-11-18 20:01:51,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 862 transitions, 9110 flow, removed 39 selfloop flow, removed 0 redundant places. [2022-11-18 20:01:51,165 INFO L231 Difference]: Finished difference. Result has 292 places, 611 transitions, 7194 flow [2022-11-18 20:01:51,165 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=3261, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=7194, PETRI_PLACES=292, PETRI_TRANSITIONS=611} [2022-11-18 20:01:51,169 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 214 predicate places. [2022-11-18 20:01:51,169 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 611 transitions, 7194 flow [2022-11-18 20:01:51,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.22222222222222) internal successors, (1916), 36 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:01:51,171 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:01:51,171 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:01:51,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:01:51,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-18 20:01:51,377 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:01:51,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:01:51,378 INFO L85 PathProgramCache]: Analyzing trace with hash 401188092, now seen corresponding path program 3 times [2022-11-18 20:01:51,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:01:51,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740972097] [2022-11-18 20:01:51,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:01:51,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:01:51,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:01:54,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:01:54,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:01:54,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740972097] [2022-11-18 20:01:54,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740972097] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:01:54,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470255601] [2022-11-18 20:01:54,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:01:54,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:01:54,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:01:54,062 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:01:54,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:01:54,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-18 20:01:54,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:01:54,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-18 20:01:54,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:01:56,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:01:56,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:02:01,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:02:01,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470255601] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:02:01,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:02:01,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 35 [2022-11-18 20:02:01,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828616210] [2022-11-18 20:02:01,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:02:01,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-18 20:02:01,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:02:01,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-18 20:02:01,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=998, Unknown=0, NotChecked=0, Total=1190 [2022-11-18 20:02:01,330 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-11-18 20:02:01,332 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 611 transitions, 7194 flow. Second operand has 35 states, 35 states have (on average 51.371428571428574) internal successors, (1798), 35 states have internal predecessors, (1798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:01,332 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:02:01,332 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-11-18 20:02:01,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:02:30,154 INFO L130 PetriNetUnfolder]: 1847/4819 cut-off events. [2022-11-18 20:02:30,154 INFO L131 PetriNetUnfolder]: For 33759/33759 co-relation queries the response was YES. [2022-11-18 20:02:30,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25093 conditions, 4819 events. 1847/4819 cut-off events. For 33759/33759 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 41410 event pairs, 79 based on Foata normal form. 9/4819 useless extension candidates. Maximal degree in co-relation 25020. Up to 1438 conditions per place. [2022-11-18 20:02:30,225 INFO L137 encePairwiseOnDemand]: 66/88 looper letters, 576 selfloop transitions, 469 changer transitions 76/1160 dead transitions. [2022-11-18 20:02:30,225 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 1160 transitions, 15635 flow [2022-11-18 20:02:30,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-11-18 20:02:30,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2022-11-18 20:02:30,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 4451 transitions. [2022-11-18 20:02:30,235 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6021374458874459 [2022-11-18 20:02:30,236 INFO L72 ComplementDD]: Start complementDD. Operand 84 states and 4451 transitions. [2022-11-18 20:02:30,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 84 states and 4451 transitions. [2022-11-18 20:02:30,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:02:30,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 84 states and 4451 transitions. [2022-11-18 20:02:30,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 85 states, 84 states have (on average 52.98809523809524) internal successors, (4451), 84 states have internal predecessors, (4451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:30,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 85 states, 85 states have (on average 88.0) internal successors, (7480), 85 states have internal predecessors, (7480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:30,265 INFO L81 ComplementDD]: Finished complementDD. Result has 85 states, 85 states have (on average 88.0) internal successors, (7480), 85 states have internal predecessors, (7480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:30,266 INFO L175 Difference]: Start difference. First operand has 292 places, 611 transitions, 7194 flow. Second operand 84 states and 4451 transitions. [2022-11-18 20:02:30,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 1160 transitions, 15635 flow [2022-11-18 20:02:30,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 1160 transitions, 15016 flow, removed 275 selfloop flow, removed 33 redundant places. [2022-11-18 20:02:30,727 INFO L231 Difference]: Finished difference. Result has 367 places, 858 transitions, 11681 flow [2022-11-18 20:02:30,728 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=6823, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=84, PETRI_FLOW=11681, PETRI_PLACES=367, PETRI_TRANSITIONS=858} [2022-11-18 20:02:30,728 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 289 predicate places. [2022-11-18 20:02:30,729 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 858 transitions, 11681 flow [2022-11-18 20:02:30,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 51.371428571428574) internal successors, (1798), 35 states have internal predecessors, (1798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:30,730 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:02:30,730 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:02:30,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-18 20:02:30,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:02:30,936 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:02:30,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:02:30,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1420383640, now seen corresponding path program 3 times [2022-11-18 20:02:30,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:02:30,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734570052] [2022-11-18 20:02:30,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:02:30,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:02:30,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:02:31,856 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:02:31,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:02:31,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734570052] [2022-11-18 20:02:31,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734570052] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:02:31,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360464394] [2022-11-18 20:02:31,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:02:31,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:02:31,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:02:31,859 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:02:31,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:02:32,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-18 20:02:32,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:02:32,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-18 20:02:32,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:02:33,362 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:02:33,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:02:34,664 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:02:34,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360464394] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:02:34,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:02:34,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19, 18] total 39 [2022-11-18 20:02:34,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859663867] [2022-11-18 20:02:34,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:02:34,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-18 20:02:34,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:02:34,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-18 20:02:34,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1198, Unknown=0, NotChecked=0, Total=1482 [2022-11-18 20:02:34,670 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-11-18 20:02:34,673 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 858 transitions, 11681 flow. Second operand has 39 states, 39 states have (on average 51.282051282051285) internal successors, (2000), 39 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:34,673 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:02:34,674 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-11-18 20:02:34,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:02:48,085 INFO L130 PetriNetUnfolder]: 2682/6878 cut-off events. [2022-11-18 20:02:48,085 INFO L131 PetriNetUnfolder]: For 89514/89514 co-relation queries the response was YES. [2022-11-18 20:02:48,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43509 conditions, 6878 events. 2682/6878 cut-off events. For 89514/89514 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 62319 event pairs, 88 based on Foata normal form. 12/6883 useless extension candidates. Maximal degree in co-relation 43408. Up to 1127 conditions per place. [2022-11-18 20:02:48,219 INFO L137 encePairwiseOnDemand]: 66/88 looper letters, 525 selfloop transitions, 987 changer transitions 79/1630 dead transitions. [2022-11-18 20:02:48,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 1630 transitions, 25782 flow [2022-11-18 20:02:48,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-11-18 20:02:48,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2022-11-18 20:02:48,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 4764 transitions. [2022-11-18 20:02:48,317 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.608273748723187 [2022-11-18 20:02:48,318 INFO L72 ComplementDD]: Start complementDD. Operand 89 states and 4764 transitions. [2022-11-18 20:02:48,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 89 states and 4764 transitions. [2022-11-18 20:02:48,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:02:48,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 89 states and 4764 transitions. [2022-11-18 20:02:48,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 90 states, 89 states have (on average 53.52808988764045) internal successors, (4764), 89 states have internal predecessors, (4764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:48,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 90 states, 90 states have (on average 88.0) internal successors, (7920), 90 states have internal predecessors, (7920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:48,347 INFO L81 ComplementDD]: Finished complementDD. Result has 90 states, 90 states have (on average 88.0) internal successors, (7920), 90 states have internal predecessors, (7920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:48,348 INFO L175 Difference]: Start difference. First operand has 367 places, 858 transitions, 11681 flow. Second operand 89 states and 4764 transitions. [2022-11-18 20:02:48,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 1630 transitions, 25782 flow [2022-11-18 20:02:49,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 1630 transitions, 24857 flow, removed 387 selfloop flow, removed 39 redundant places. [2022-11-18 20:02:49,433 INFO L231 Difference]: Finished difference. Result has 443 places, 1254 transitions, 21390 flow [2022-11-18 20:02:49,434 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=11080, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=858, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=619, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=89, PETRI_FLOW=21390, PETRI_PLACES=443, PETRI_TRANSITIONS=1254} [2022-11-18 20:02:49,434 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 365 predicate places. [2022-11-18 20:02:49,435 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 1254 transitions, 21390 flow [2022-11-18 20:02:49,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 51.282051282051285) internal successors, (2000), 39 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:49,436 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:02:49,436 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:02:49,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:02:49,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:02:49,642 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:02:49,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:02:49,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1172714983, now seen corresponding path program 4 times [2022-11-18 20:02:49,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:02:49,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448773467] [2022-11-18 20:02:49,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:02:49,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:02:49,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:02:52,191 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:02:52,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:02:52,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448773467] [2022-11-18 20:02:52,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448773467] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:02:52,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030694714] [2022-11-18 20:02:52,192 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:02:52,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:02:52,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:02:52,201 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:02:52,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:02:52,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:02:52,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:02:52,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-18 20:02:52,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:02:54,301 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:02:54,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:03:00,120 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:03:00,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030694714] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:03:00,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:03:00,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 18] total 38 [2022-11-18 20:03:00,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528819295] [2022-11-18 20:03:00,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:03:00,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-18 20:03:00,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:03:00,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-18 20:03:00,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1152, Unknown=0, NotChecked=0, Total=1406 [2022-11-18 20:03:00,124 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 88 [2022-11-18 20:03:00,126 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 1254 transitions, 21390 flow. Second operand has 38 states, 38 states have (on average 53.26315789473684) internal successors, (2024), 38 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:03:00,127 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:03:00,127 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 88 [2022-11-18 20:03:00,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:04:03,013 INFO L130 PetriNetUnfolder]: 2754/7649 cut-off events. [2022-11-18 20:04:03,013 INFO L131 PetriNetUnfolder]: For 143097/143213 co-relation queries the response was YES. [2022-11-18 20:04:03,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55269 conditions, 7649 events. 2754/7649 cut-off events. For 143097/143213 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 74397 event pairs, 42 based on Foata normal form. 65/7710 useless extension candidates. Maximal degree in co-relation 55140. Up to 2071 conditions per place. [2022-11-18 20:04:03,238 INFO L137 encePairwiseOnDemand]: 67/88 looper letters, 893 selfloop transitions, 745 changer transitions 95/1856 dead transitions. [2022-11-18 20:04:03,238 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 1856 transitions, 35091 flow [2022-11-18 20:04:03,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-11-18 20:04:03,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2022-11-18 20:04:03,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 4979 transitions. [2022-11-18 20:04:03,248 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6217532467532467 [2022-11-18 20:04:03,248 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 4979 transitions. [2022-11-18 20:04:03,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 4979 transitions. [2022-11-18 20:04:03,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:04:03,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 4979 transitions. [2022-11-18 20:04:03,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 54.714285714285715) internal successors, (4979), 91 states have internal predecessors, (4979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:04:03,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 88.0) internal successors, (8096), 92 states have internal predecessors, (8096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:04:03,276 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 88.0) internal successors, (8096), 92 states have internal predecessors, (8096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:04:03,276 INFO L175 Difference]: Start difference. First operand has 443 places, 1254 transitions, 21390 flow. Second operand 91 states and 4979 transitions. [2022-11-18 20:04:03,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 1856 transitions, 35091 flow [2022-11-18 20:04:05,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 1856 transitions, 32227 flow, removed 1348 selfloop flow, removed 44 redundant places. [2022-11-18 20:04:05,591 INFO L231 Difference]: Finished difference. Result has 516 places, 1557 transitions, 28249 flow [2022-11-18 20:04:05,592 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=19714, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=491, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=670, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=28249, PETRI_PLACES=516, PETRI_TRANSITIONS=1557} [2022-11-18 20:04:05,592 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 438 predicate places. [2022-11-18 20:04:05,593 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 1557 transitions, 28249 flow [2022-11-18 20:04:05,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 53.26315789473684) internal successors, (2024), 38 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:04:05,593 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:04:05,593 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:04:05,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:04:05,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-18 20:04:05,794 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:04:05,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:04:05,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1889315571, now seen corresponding path program 5 times [2022-11-18 20:04:05,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:04:05,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166247457] [2022-11-18 20:04:05,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:04:05,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:04:05,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:04:10,808 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:04:10,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:04:10,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166247457] [2022-11-18 20:04:10,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166247457] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:04:10,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151362449] [2022-11-18 20:04:10,808 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:04:10,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:04:10,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:04:10,810 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:04:10,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:04:10,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-18 20:04:10,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:04:10,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-18 20:04:10,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:04:13,734 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:04:13,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:04:20,367 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:04:20,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151362449] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:04:20,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:04:20,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23, 22] total 50 [2022-11-18 20:04:20,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490733041] [2022-11-18 20:04:20,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:04:20,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-18 20:04:20,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:04:20,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-18 20:04:20,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=2048, Unknown=1, NotChecked=0, Total=2450 [2022-11-18 20:04:20,373 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-11-18 20:04:20,376 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 1557 transitions, 28249 flow. Second operand has 50 states, 50 states have (on average 50.86) internal successors, (2543), 50 states have internal predecessors, (2543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:04:20,376 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:04:20,376 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-11-18 20:04:20,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:06:21,158 INFO L130 PetriNetUnfolder]: 4516/11853 cut-off events. [2022-11-18 20:06:21,158 INFO L131 PetriNetUnfolder]: For 203733/203733 co-relation queries the response was YES. [2022-11-18 20:06:21,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87425 conditions, 11853 events. 4516/11853 cut-off events. For 203733/203733 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 120092 event pairs, 28 based on Foata normal form. 24/11875 useless extension candidates. Maximal degree in co-relation 87272. Up to 2050 conditions per place. [2022-11-18 20:06:21,604 INFO L137 encePairwiseOnDemand]: 62/88 looper letters, 1333 selfloop transitions, 2249 changer transitions 197/3818 dead transitions. [2022-11-18 20:06:21,605 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 726 places, 3818 transitions, 76881 flow [2022-11-18 20:06:21,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 242 states. [2022-11-18 20:06:21,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2022-11-18 20:06:21,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 12717 transitions. [2022-11-18 20:06:21,621 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5971543951915853 [2022-11-18 20:06:21,622 INFO L72 ComplementDD]: Start complementDD. Operand 242 states and 12717 transitions. [2022-11-18 20:06:21,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 242 states and 12717 transitions. [2022-11-18 20:06:21,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:06:21,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 242 states and 12717 transitions. [2022-11-18 20:06:21,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 243 states, 242 states have (on average 52.549586776859506) internal successors, (12717), 242 states have internal predecessors, (12717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:06:21,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 243 states, 243 states have (on average 88.0) internal successors, (21384), 243 states have internal predecessors, (21384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:06:21,683 INFO L81 ComplementDD]: Finished complementDD. Result has 243 states, 243 states have (on average 88.0) internal successors, (21384), 243 states have internal predecessors, (21384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:06:21,684 INFO L175 Difference]: Start difference. First operand has 516 places, 1557 transitions, 28249 flow. Second operand 242 states and 12717 transitions. [2022-11-18 20:06:21,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 726 places, 3818 transitions, 76881 flow [2022-11-18 20:06:24,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 679 places, 3818 transitions, 73103 flow, removed 1762 selfloop flow, removed 47 redundant places. [2022-11-18 20:06:24,981 INFO L231 Difference]: Finished difference. Result has 763 places, 3050 transitions, 61943 flow [2022-11-18 20:06:24,983 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=27154, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=925, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=242, PETRI_FLOW=61943, PETRI_PLACES=763, PETRI_TRANSITIONS=3050} [2022-11-18 20:06:24,983 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 685 predicate places. [2022-11-18 20:06:24,984 INFO L495 AbstractCegarLoop]: Abstraction has has 763 places, 3050 transitions, 61943 flow [2022-11-18 20:06:24,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 50.86) internal successors, (2543), 50 states have internal predecessors, (2543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:06:24,985 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:06:24,985 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:06:24,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:06:25,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:06:25,191 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:06:25,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:06:25,191 INFO L85 PathProgramCache]: Analyzing trace with hash 929625051, now seen corresponding path program 6 times [2022-11-18 20:06:25,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:06:25,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974849721] [2022-11-18 20:06:25,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:06:25,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:06:25,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:06:26,965 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:06:26,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:06:26,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974849721] [2022-11-18 20:06:26,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974849721] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:06:26,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636954309] [2022-11-18 20:06:26,965 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:06:26,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:06:26,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:06:26,968 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:06:26,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64e85a7-7f8d-4220-b982-2e4955b0edfa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:06:27,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-18 20:06:27,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:06:27,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-18 20:06:27,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:06:37,884 WARN L233 SmtUtils]: Spent 6.81s on a formula simplification. DAG size of input: 5776 DAG size of output: 5229 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)