./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-commit-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-commit-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS --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 f484a00c18d1df7ceedc12992e35584262ebeacdaf88de41be4bc57f4fb5401d --- 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-4e7fbc6 [2022-11-23 04:13:11,776 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 04:13:11,779 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 04:13:11,816 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 04:13:11,822 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 04:13:11,824 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 04:13:11,827 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 04:13:11,832 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 04:13:11,834 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 04:13:11,836 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 04:13:11,837 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 04:13:11,839 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 04:13:11,840 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 04:13:11,842 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 04:13:11,843 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 04:13:11,845 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 04:13:11,846 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 04:13:11,847 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 04:13:11,848 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 04:13:11,850 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 04:13:11,852 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 04:13:11,859 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 04:13:11,860 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 04:13:11,861 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 04:13:11,869 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 04:13:11,870 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 04:13:11,871 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 04:13:11,872 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 04:13:11,873 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 04:13:11,874 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 04:13:11,876 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 04:13:11,877 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 04:13:11,878 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 04:13:11,879 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 04:13:11,880 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 04:13:11,881 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 04:13:11,883 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 04:13:11,883 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 04:13:11,883 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 04:13:11,885 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 04:13:11,885 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 04:13:11,886 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-23 04:13:11,936 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 04:13:11,936 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 04:13:11,936 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 04:13:11,937 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 04:13:11,937 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 04:13:11,938 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 04:13:11,938 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 04:13:11,939 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 04:13:11,939 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 04:13:11,939 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 04:13:11,940 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 04:13:11,940 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 04:13:11,940 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 04:13:11,941 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 04:13:11,941 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 04:13:11,941 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 04:13:11,941 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 04:13:11,941 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 04:13:11,942 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 04:13:11,942 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 04:13:11,942 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 04:13:11,942 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 04:13:11,943 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 04:13:11,943 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 04:13:11,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 04:13:11,943 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 04:13:11,943 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 04:13:11,944 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 04:13:11,944 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 04:13:11,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 04:13:11,944 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 04:13:11,944 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 04:13:11,945 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 04:13:11,945 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 04:13:11,945 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f484a00c18d1df7ceedc12992e35584262ebeacdaf88de41be4bc57f4fb5401d [2022-11-23 04:13:12,290 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 04:13:12,316 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 04:13:12,318 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 04:13:12,319 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 04:13:12,320 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 04:13:12,321 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/weaver/popl20-commit-2.wvr.c [2022-11-23 04:13:15,313 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 04:13:15,528 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 04:13:15,529 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/sv-benchmarks/c/weaver/popl20-commit-2.wvr.c [2022-11-23 04:13:15,542 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/data/2b3cd98d1/781a9b31a0384809a6d4c4d5a76430c4/FLAG3ee99fecf [2022-11-23 04:13:15,562 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/data/2b3cd98d1/781a9b31a0384809a6d4c4d5a76430c4 [2022-11-23 04:13:15,571 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 04:13:15,573 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 04:13:15,575 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 04:13:15,577 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 04:13:15,580 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 04:13:15,581 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:13:15" (1/1) ... [2022-11-23 04:13:15,582 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@610289c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:13:15, skipping insertion in model container [2022-11-23 04:13:15,583 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:13:15" (1/1) ... [2022-11-23 04:13:15,590 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 04:13:15,631 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 04:13:15,914 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/sv-benchmarks/c/weaver/popl20-commit-2.wvr.c[5846,5859] [2022-11-23 04:13:15,938 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 04:13:15,949 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 04:13:16,011 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/sv-benchmarks/c/weaver/popl20-commit-2.wvr.c[5846,5859] [2022-11-23 04:13:16,018 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 04:13:16,049 INFO L208 MainTranslator]: Completed translation [2022-11-23 04:13:16,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:13:16 WrapperNode [2022-11-23 04:13:16,050 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 04:13:16,051 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 04:13:16,052 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 04:13:16,052 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 04:13:16,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:13:16" (1/1) ... [2022-11-23 04:13:16,082 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:13:16" (1/1) ... [2022-11-23 04:13:16,139 INFO L138 Inliner]: procedures = 26, calls = 93, calls flagged for inlining = 27, calls inlined = 33, statements flattened = 456 [2022-11-23 04:13:16,140 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 04:13:16,141 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 04:13:16,141 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 04:13:16,149 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 04:13:16,157 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:13:16" (1/1) ... [2022-11-23 04:13:16,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:13:16" (1/1) ... [2022-11-23 04:13:16,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:13:16" (1/1) ... [2022-11-23 04:13:16,163 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:13:16" (1/1) ... [2022-11-23 04:13:16,175 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:13:16" (1/1) ... [2022-11-23 04:13:16,181 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:13:16" (1/1) ... [2022-11-23 04:13:16,184 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:13:16" (1/1) ... [2022-11-23 04:13:16,186 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:13:16" (1/1) ... [2022-11-23 04:13:16,190 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 04:13:16,191 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 04:13:16,191 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 04:13:16,192 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 04:13:16,193 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:13:16" (1/1) ... [2022-11-23 04:13:16,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 04:13:16,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:13:16,224 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 04:13:16,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 04:13:16,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 04:13:16,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 04:13:16,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 04:13:16,282 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 04:13:16,283 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-23 04:13:16,283 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-23 04:13:16,283 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-23 04:13:16,283 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-23 04:13:16,283 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-23 04:13:16,284 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-23 04:13:16,284 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-23 04:13:16,284 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-23 04:13:16,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 04:13:16,284 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-23 04:13:16,284 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-23 04:13:16,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 04:13:16,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 04:13:16,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 04:13:16,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 04:13:16,287 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 04:13:16,415 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 04:13:16,417 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 04:13:17,204 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 04:13:17,570 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 04:13:17,570 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2022-11-23 04:13:17,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:13:17 BoogieIcfgContainer [2022-11-23 04:13:17,574 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 04:13:17,578 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 04:13:17,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 04:13:17,581 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 04:13:17,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:13:15" (1/3) ... [2022-11-23 04:13:17,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@537b6f4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:13:17, skipping insertion in model container [2022-11-23 04:13:17,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:13:16" (2/3) ... [2022-11-23 04:13:17,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@537b6f4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:13:17, skipping insertion in model container [2022-11-23 04:13:17,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:13:17" (3/3) ... [2022-11-23 04:13:17,586 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-commit-2.wvr.c [2022-11-23 04:13:17,596 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-23 04:13:17,606 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 04:13:17,607 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 04:13:17,607 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 04:13:17,720 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-23 04:13:17,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 316 places, 328 transitions, 688 flow [2022-11-23 04:13:17,915 INFO L130 PetriNetUnfolder]: 25/324 cut-off events. [2022-11-23 04:13:17,915 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-23 04:13:17,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 341 conditions, 324 events. 25/324 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 185 event pairs, 0 based on Foata normal form. 0/298 useless extension candidates. Maximal degree in co-relation 284. Up to 2 conditions per place. [2022-11-23 04:13:17,924 INFO L82 GeneralOperation]: Start removeDead. Operand has 316 places, 328 transitions, 688 flow [2022-11-23 04:13:17,931 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 299 places, 311 transitions, 646 flow [2022-11-23 04:13:17,936 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 04:13:17,957 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 299 places, 311 transitions, 646 flow [2022-11-23 04:13:17,961 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 299 places, 311 transitions, 646 flow [2022-11-23 04:13:17,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 299 places, 311 transitions, 646 flow [2022-11-23 04:13:18,045 INFO L130 PetriNetUnfolder]: 25/311 cut-off events. [2022-11-23 04:13:18,045 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-23 04:13:18,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 311 events. 25/311 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 183 event pairs, 0 based on Foata normal form. 0/286 useless extension candidates. Maximal degree in co-relation 284. Up to 2 conditions per place. [2022-11-23 04:13:18,052 INFO L119 LiptonReduction]: Number of co-enabled transitions 2544 [2022-11-23 04:13:34,939 INFO L134 LiptonReduction]: Checked pairs total: 6074 [2022-11-23 04:13:34,939 INFO L136 LiptonReduction]: Total number of compositions: 322 [2022-11-23 04:13:34,966 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 04:13:34,975 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;@66d5296b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 04:13:34,975 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-23 04:13:34,995 INFO L130 PetriNetUnfolder]: 8/40 cut-off events. [2022-11-23 04:13:34,995 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-23 04:13:34,995 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:13:34,996 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] [2022-11-23 04:13:34,996 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 04:13:35,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:13:35,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1617324947, now seen corresponding path program 1 times [2022-11-23 04:13:35,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:13:35,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516836604] [2022-11-23 04:13:35,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:13:35,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:13:35,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:13:35,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:13:35,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:13:35,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516836604] [2022-11-23 04:13:35,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516836604] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 04:13:35,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 04:13:35,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 04:13:35,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773988832] [2022-11-23 04:13:35,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 04:13:35,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 04:13:35,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:13:35,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 04:13:35,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 04:13:35,965 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 288 out of 650 [2022-11-23 04:13:35,970 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 296.3333333333333) internal successors, (889), 3 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:35,974 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:13:35,975 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 288 of 650 [2022-11-23 04:13:35,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:13:36,773 INFO L130 PetriNetUnfolder]: 2346/3110 cut-off events. [2022-11-23 04:13:36,774 INFO L131 PetriNetUnfolder]: For 229/229 co-relation queries the response was YES. [2022-11-23 04:13:36,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6500 conditions, 3110 events. 2346/3110 cut-off events. For 229/229 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 11933 event pairs, 381 based on Foata normal form. 1/2317 useless extension candidates. Maximal degree in co-relation 5552. Up to 2810 conditions per place. [2022-11-23 04:13:36,797 INFO L137 encePairwiseOnDemand]: 644/650 looper letters, 58 selfloop transitions, 5 changer transitions 1/64 dead transitions. [2022-11-23 04:13:36,797 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 64 transitions, 301 flow [2022-11-23 04:13:36,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 04:13:36,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 04:13:36,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 929 transitions. [2022-11-23 04:13:36,823 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4764102564102564 [2022-11-23 04:13:36,824 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 929 transitions. [2022-11-23 04:13:36,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 929 transitions. [2022-11-23 04:13:36,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:13:36,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 929 transitions. [2022-11-23 04:13:36,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 309.6666666666667) internal successors, (929), 3 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:36,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 650.0) internal successors, (2600), 4 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:36,852 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 650.0) internal successors, (2600), 4 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:36,854 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 106 flow. Second operand 3 states and 929 transitions. [2022-11-23 04:13:36,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 64 transitions, 301 flow [2022-11-23 04:13:36,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 64 transitions, 271 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-11-23 04:13:36,864 INFO L231 Difference]: Finished difference. Result has 41 places, 45 transitions, 123 flow [2022-11-23 04:13:36,867 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=650, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=123, PETRI_PLACES=41, PETRI_TRANSITIONS=45} [2022-11-23 04:13:36,871 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, -5 predicate places. [2022-11-23 04:13:36,871 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 45 transitions, 123 flow [2022-11-23 04:13:36,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 296.3333333333333) internal successors, (889), 3 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:36,873 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:13:36,873 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] [2022-11-23 04:13:36,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 04:13:36,877 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 04:13:36,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:13:36,877 INFO L85 PathProgramCache]: Analyzing trace with hash -572835440, now seen corresponding path program 1 times [2022-11-23 04:13:36,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:13:36,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343978078] [2022-11-23 04:13:36,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:13:36,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:13:36,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:13:37,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:13:37,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:13:37,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343978078] [2022-11-23 04:13:37,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343978078] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 04:13:37,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 04:13:37,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 04:13:37,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547292437] [2022-11-23 04:13:37,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 04:13:37,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 04:13:37,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:13:37,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 04:13:37,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 04:13:37,339 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 650 [2022-11-23 04:13:37,343 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 45 transitions, 123 flow. Second operand has 4 states, 4 states have (on average 278.75) internal successors, (1115), 4 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:37,343 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:13:37,343 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 650 [2022-11-23 04:13:37,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:13:38,069 INFO L130 PetriNetUnfolder]: 2646/3592 cut-off events. [2022-11-23 04:13:38,070 INFO L131 PetriNetUnfolder]: For 811/811 co-relation queries the response was YES. [2022-11-23 04:13:38,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8455 conditions, 3592 events. 2646/3592 cut-off events. For 811/811 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 13405 event pairs, 1817 based on Foata normal form. 166/3568 useless extension candidates. Maximal degree in co-relation 3795. Up to 3111 conditions per place. [2022-11-23 04:13:38,090 INFO L137 encePairwiseOnDemand]: 643/650 looper letters, 44 selfloop transitions, 2 changer transitions 30/76 dead transitions. [2022-11-23 04:13:38,090 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 76 transitions, 355 flow [2022-11-23 04:13:38,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 04:13:38,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 04:13:38,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1162 transitions. [2022-11-23 04:13:38,094 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4469230769230769 [2022-11-23 04:13:38,095 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1162 transitions. [2022-11-23 04:13:38,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1162 transitions. [2022-11-23 04:13:38,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:13:38,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1162 transitions. [2022-11-23 04:13:38,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 290.5) internal successors, (1162), 4 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:38,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 650.0) internal successors, (3250), 5 states have internal predecessors, (3250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:38,106 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 650.0) internal successors, (3250), 5 states have internal predecessors, (3250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:38,106 INFO L175 Difference]: Start difference. First operand has 41 places, 45 transitions, 123 flow. Second operand 4 states and 1162 transitions. [2022-11-23 04:13:38,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 76 transitions, 355 flow [2022-11-23 04:13:38,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 76 transitions, 348 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 04:13:38,111 INFO L231 Difference]: Finished difference. Result has 45 places, 46 transitions, 140 flow [2022-11-23 04:13:38,112 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=650, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=45, PETRI_TRANSITIONS=46} [2022-11-23 04:13:38,112 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, -1 predicate places. [2022-11-23 04:13:38,112 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 46 transitions, 140 flow [2022-11-23 04:13:38,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 278.75) internal successors, (1115), 4 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:38,114 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:13:38,114 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] [2022-11-23 04:13:38,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 04:13:38,115 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 04:13:38,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:13:38,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1088561178, now seen corresponding path program 1 times [2022-11-23 04:13:38,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:13:38,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11866487] [2022-11-23 04:13:38,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:13:38,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:13:38,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:13:38,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 04:13:38,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:13:38,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11866487] [2022-11-23 04:13:38,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11866487] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 04:13:38,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 04:13:38,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 04:13:38,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65636984] [2022-11-23 04:13:38,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 04:13:38,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 04:13:38,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:13:38,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 04:13:38,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 04:13:38,439 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 650 [2022-11-23 04:13:38,441 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 46 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 295.3333333333333) internal successors, (886), 3 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:38,441 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:13:38,441 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 650 [2022-11-23 04:13:38,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:13:39,114 INFO L130 PetriNetUnfolder]: 2852/3829 cut-off events. [2022-11-23 04:13:39,115 INFO L131 PetriNetUnfolder]: For 1487/1487 co-relation queries the response was YES. [2022-11-23 04:13:39,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9573 conditions, 3829 events. 2852/3829 cut-off events. For 1487/1487 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 14675 event pairs, 765 based on Foata normal form. 140/3965 useless extension candidates. Maximal degree in co-relation 9559. Up to 2698 conditions per place. [2022-11-23 04:13:39,218 INFO L137 encePairwiseOnDemand]: 647/650 looper letters, 68 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2022-11-23 04:13:39,226 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 70 transitions, 347 flow [2022-11-23 04:13:39,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 04:13:39,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 04:13:39,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 925 transitions. [2022-11-23 04:13:39,232 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47435897435897434 [2022-11-23 04:13:39,232 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 925 transitions. [2022-11-23 04:13:39,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 925 transitions. [2022-11-23 04:13:39,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:13:39,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 925 transitions. [2022-11-23 04:13:39,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 308.3333333333333) internal successors, (925), 3 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:39,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 650.0) internal successors, (2600), 4 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:39,242 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 650.0) internal successors, (2600), 4 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:39,242 INFO L175 Difference]: Start difference. First operand has 45 places, 46 transitions, 140 flow. Second operand 3 states and 925 transitions. [2022-11-23 04:13:39,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 70 transitions, 347 flow [2022-11-23 04:13:39,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 70 transitions, 343 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-23 04:13:39,252 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 144 flow [2022-11-23 04:13:39,252 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=650, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2022-11-23 04:13:39,253 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 0 predicate places. [2022-11-23 04:13:39,253 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 144 flow [2022-11-23 04:13:39,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 295.3333333333333) internal successors, (886), 3 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:39,254 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:13:39,255 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] [2022-11-23 04:13:39,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 04:13:39,255 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 04:13:39,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:13:39,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1681316830, now seen corresponding path program 1 times [2022-11-23 04:13:39,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:13:39,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730864974] [2022-11-23 04:13:39,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:13:39,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:13:39,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:13:39,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 04:13:39,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:13:39,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730864974] [2022-11-23 04:13:39,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730864974] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 04:13:39,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 04:13:39,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 04:13:39,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605027116] [2022-11-23 04:13:39,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 04:13:39,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 04:13:39,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:13:39,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 04:13:39,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 04:13:39,645 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 650 [2022-11-23 04:13:39,647 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 293.3333333333333) internal successors, (880), 3 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:39,650 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:13:39,651 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 650 [2022-11-23 04:13:39,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:13:40,278 INFO L130 PetriNetUnfolder]: 2676/3627 cut-off events. [2022-11-23 04:13:40,278 INFO L131 PetriNetUnfolder]: For 1612/1612 co-relation queries the response was YES. [2022-11-23 04:13:40,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9333 conditions, 3627 events. 2676/3627 cut-off events. For 1612/1612 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13708 event pairs, 689 based on Foata normal form. 132/3755 useless extension candidates. Maximal degree in co-relation 9313. Up to 2700 conditions per place. [2022-11-23 04:13:40,302 INFO L137 encePairwiseOnDemand]: 647/650 looper letters, 68 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2022-11-23 04:13:40,302 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 70 transitions, 353 flow [2022-11-23 04:13:40,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 04:13:40,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 04:13:40,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 920 transitions. [2022-11-23 04:13:40,307 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4717948717948718 [2022-11-23 04:13:40,307 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 920 transitions. [2022-11-23 04:13:40,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 920 transitions. [2022-11-23 04:13:40,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:13:40,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 920 transitions. [2022-11-23 04:13:40,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 306.6666666666667) internal successors, (920), 3 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:40,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 650.0) internal successors, (2600), 4 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:40,316 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 650.0) internal successors, (2600), 4 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:40,316 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 144 flow. Second operand 3 states and 920 transitions. [2022-11-23 04:13:40,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 70 transitions, 353 flow [2022-11-23 04:13:40,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 70 transitions, 351 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 04:13:40,321 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 150 flow [2022-11-23 04:13:40,321 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=650, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2022-11-23 04:13:40,323 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2022-11-23 04:13:40,324 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 150 flow [2022-11-23 04:13:40,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 293.3333333333333) internal successors, (880), 3 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:40,325 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:13:40,325 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] [2022-11-23 04:13:40,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 04:13:40,325 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 04:13:40,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:13:40,326 INFO L85 PathProgramCache]: Analyzing trace with hash 732723412, now seen corresponding path program 1 times [2022-11-23 04:13:40,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:13:40,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773379338] [2022-11-23 04:13:40,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:13:40,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:13:40,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:13:40,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 04:13:40,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:13:40,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773379338] [2022-11-23 04:13:40,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773379338] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 04:13:40,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 04:13:40,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 04:13:40,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922922510] [2022-11-23 04:13:40,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 04:13:40,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 04:13:40,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:13:40,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 04:13:40,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 04:13:40,617 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 650 [2022-11-23 04:13:40,618 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 295.3333333333333) internal successors, (886), 3 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:40,619 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:13:40,619 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 650 [2022-11-23 04:13:40,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:13:41,352 INFO L130 PetriNetUnfolder]: 3151/4250 cut-off events. [2022-11-23 04:13:41,352 INFO L131 PetriNetUnfolder]: For 2452/2452 co-relation queries the response was YES. [2022-11-23 04:13:41,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11311 conditions, 4250 events. 3151/4250 cut-off events. For 2452/2452 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 15884 event pairs, 896 based on Foata normal form. 104/4350 useless extension candidates. Maximal degree in co-relation 11289. Up to 2724 conditions per place. [2022-11-23 04:13:41,394 INFO L137 encePairwiseOnDemand]: 647/650 looper letters, 61 selfloop transitions, 2 changer transitions 8/71 dead transitions. [2022-11-23 04:13:41,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 71 transitions, 361 flow [2022-11-23 04:13:41,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 04:13:41,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 04:13:41,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 929 transitions. [2022-11-23 04:13:41,397 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4764102564102564 [2022-11-23 04:13:41,398 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 929 transitions. [2022-11-23 04:13:41,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 929 transitions. [2022-11-23 04:13:41,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:13:41,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 929 transitions. [2022-11-23 04:13:41,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 309.6666666666667) internal successors, (929), 3 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:41,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 650.0) internal successors, (2600), 4 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:41,407 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 650.0) internal successors, (2600), 4 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:41,407 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 150 flow. Second operand 3 states and 929 transitions. [2022-11-23 04:13:41,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 71 transitions, 361 flow [2022-11-23 04:13:41,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 71 transitions, 359 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 04:13:41,414 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 156 flow [2022-11-23 04:13:41,414 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=650, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2022-11-23 04:13:41,414 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 4 predicate places. [2022-11-23 04:13:41,415 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 156 flow [2022-11-23 04:13:41,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 295.3333333333333) internal successors, (886), 3 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:41,416 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:13:41,416 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] [2022-11-23 04:13:41,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 04:13:41,416 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 04:13:41,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:13:41,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1443794684, now seen corresponding path program 1 times [2022-11-23 04:13:41,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:13:41,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935001958] [2022-11-23 04:13:41,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:13:41,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:13:41,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:13:41,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 04:13:41,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:13:41,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935001958] [2022-11-23 04:13:41,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935001958] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 04:13:41,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 04:13:41,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 04:13:41,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359471585] [2022-11-23 04:13:41,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 04:13:41,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 04:13:41,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:13:41,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 04:13:41,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 04:13:41,835 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 650 [2022-11-23 04:13:41,837 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 156 flow. Second operand has 4 states, 4 states have (on average 280.0) internal successors, (1120), 4 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:41,837 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:13:41,837 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 650 [2022-11-23 04:13:41,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:13:42,781 INFO L130 PetriNetUnfolder]: 3524/4840 cut-off events. [2022-11-23 04:13:42,781 INFO L131 PetriNetUnfolder]: For 3100/3100 co-relation queries the response was YES. [2022-11-23 04:13:42,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13079 conditions, 4840 events. 3524/4840 cut-off events. For 3100/3100 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 18968 event pairs, 2708 based on Foata normal form. 56/4889 useless extension candidates. Maximal degree in co-relation 13055. Up to 4244 conditions per place. [2022-11-23 04:13:42,809 INFO L137 encePairwiseOnDemand]: 640/650 looper letters, 42 selfloop transitions, 9 changer transitions 25/76 dead transitions. [2022-11-23 04:13:42,809 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 76 transitions, 390 flow [2022-11-23 04:13:42,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 04:13:42,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 04:13:42,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1433 transitions. [2022-11-23 04:13:42,814 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4409230769230769 [2022-11-23 04:13:42,815 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1433 transitions. [2022-11-23 04:13:42,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1433 transitions. [2022-11-23 04:13:42,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:13:42,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1433 transitions. [2022-11-23 04:13:42,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 286.6) internal successors, (1433), 5 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:42,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 650.0) internal successors, (3900), 6 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:42,831 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 650.0) internal successors, (3900), 6 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:42,831 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 156 flow. Second operand 5 states and 1433 transitions. [2022-11-23 04:13:42,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 76 transitions, 390 flow [2022-11-23 04:13:42,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 76 transitions, 388 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 04:13:42,837 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 210 flow [2022-11-23 04:13:42,837 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=650, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=210, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2022-11-23 04:13:42,840 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 10 predicate places. [2022-11-23 04:13:42,840 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 210 flow [2022-11-23 04:13:42,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 280.0) internal successors, (1120), 4 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:42,841 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:13:42,841 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] [2022-11-23 04:13:42,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 04:13:42,841 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 04:13:42,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:13:42,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1734407579, now seen corresponding path program 1 times [2022-11-23 04:13:42,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:13:42,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271637909] [2022-11-23 04:13:42,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:13:42,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:13:42,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:13:43,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 04:13:43,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:13:43,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271637909] [2022-11-23 04:13:43,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271637909] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 04:13:43,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 04:13:43,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 04:13:43,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639906112] [2022-11-23 04:13:43,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 04:13:43,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 04:13:43,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:13:43,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 04:13:43,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 04:13:43,256 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 650 [2022-11-23 04:13:43,258 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 210 flow. Second operand has 4 states, 4 states have (on average 280.25) internal successors, (1121), 4 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:43,258 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:13:43,258 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 650 [2022-11-23 04:13:43,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:13:44,176 INFO L130 PetriNetUnfolder]: 3402/4664 cut-off events. [2022-11-23 04:13:44,176 INFO L131 PetriNetUnfolder]: For 3088/3088 co-relation queries the response was YES. [2022-11-23 04:13:44,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12618 conditions, 4664 events. 3402/4664 cut-off events. For 3088/3088 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 18101 event pairs, 2604 based on Foata normal form. 38/4700 useless extension candidates. Maximal degree in co-relation 12586. Up to 4247 conditions per place. [2022-11-23 04:13:44,202 INFO L137 encePairwiseOnDemand]: 641/650 looper letters, 43 selfloop transitions, 7 changer transitions 25/75 dead transitions. [2022-11-23 04:13:44,203 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 75 transitions, 429 flow [2022-11-23 04:13:44,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 04:13:44,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 04:13:44,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1431 transitions. [2022-11-23 04:13:44,209 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4403076923076923 [2022-11-23 04:13:44,209 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1431 transitions. [2022-11-23 04:13:44,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1431 transitions. [2022-11-23 04:13:44,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:13:44,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1431 transitions. [2022-11-23 04:13:44,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 286.2) internal successors, (1431), 5 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:44,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 650.0) internal successors, (3900), 6 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:44,220 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 650.0) internal successors, (3900), 6 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:44,221 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 210 flow. Second operand 5 states and 1431 transitions. [2022-11-23 04:13:44,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 75 transitions, 429 flow [2022-11-23 04:13:44,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 75 transitions, 420 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-11-23 04:13:44,226 INFO L231 Difference]: Finished difference. Result has 61 places, 50 transitions, 225 flow [2022-11-23 04:13:44,226 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=650, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=225, PETRI_PLACES=61, PETRI_TRANSITIONS=50} [2022-11-23 04:13:44,227 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 15 predicate places. [2022-11-23 04:13:44,227 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 50 transitions, 225 flow [2022-11-23 04:13:44,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 280.25) internal successors, (1121), 4 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:44,232 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:13:44,233 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] [2022-11-23 04:13:44,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 04:13:44,233 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 04:13:44,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:13:44,234 INFO L85 PathProgramCache]: Analyzing trace with hash -79497925, now seen corresponding path program 1 times [2022-11-23 04:13:44,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:13:44,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449520652] [2022-11-23 04:13:44,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:13:44,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:13:44,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:13:44,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 04:13:44,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:13:44,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449520652] [2022-11-23 04:13:44,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449520652] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 04:13:44,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 04:13:44,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 04:13:44,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397292432] [2022-11-23 04:13:44,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 04:13:44,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 04:13:44,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:13:44,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 04:13:44,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 04:13:44,590 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 650 [2022-11-23 04:13:44,591 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 50 transitions, 225 flow. Second operand has 4 states, 4 states have (on average 280.5) internal successors, (1122), 4 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:44,592 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:13:44,592 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 650 [2022-11-23 04:13:44,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:13:45,928 INFO L130 PetriNetUnfolder]: 4217/5777 cut-off events. [2022-11-23 04:13:45,928 INFO L131 PetriNetUnfolder]: For 3806/3806 co-relation queries the response was YES. [2022-11-23 04:13:45,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15593 conditions, 5777 events. 4217/5777 cut-off events. For 3806/3806 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 23192 event pairs, 3251 based on Foata normal form. 80/5855 useless extension candidates. Maximal degree in co-relation 15554. Up to 4250 conditions per place. [2022-11-23 04:13:45,959 INFO L137 encePairwiseOnDemand]: 645/650 looper letters, 46 selfloop transitions, 3 changer transitions 36/85 dead transitions. [2022-11-23 04:13:45,959 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 85 transitions, 515 flow [2022-11-23 04:13:45,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 04:13:45,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 04:13:45,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1165 transitions. [2022-11-23 04:13:45,963 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4480769230769231 [2022-11-23 04:13:45,963 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1165 transitions. [2022-11-23 04:13:45,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1165 transitions. [2022-11-23 04:13:45,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:13:45,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1165 transitions. [2022-11-23 04:13:45,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 291.25) internal successors, (1165), 4 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:45,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 650.0) internal successors, (3250), 5 states have internal predecessors, (3250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:45,972 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 650.0) internal successors, (3250), 5 states have internal predecessors, (3250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:45,973 INFO L175 Difference]: Start difference. First operand has 61 places, 50 transitions, 225 flow. Second operand 4 states and 1165 transitions. [2022-11-23 04:13:45,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 85 transitions, 515 flow [2022-11-23 04:13:45,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 85 transitions, 474 flow, removed 7 selfloop flow, removed 5 redundant places. [2022-11-23 04:13:45,980 INFO L231 Difference]: Finished difference. Result has 60 places, 49 transitions, 200 flow [2022-11-23 04:13:45,980 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=650, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=200, PETRI_PLACES=60, PETRI_TRANSITIONS=49} [2022-11-23 04:13:45,983 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 14 predicate places. [2022-11-23 04:13:45,984 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 49 transitions, 200 flow [2022-11-23 04:13:45,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 280.5) internal successors, (1122), 4 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:45,984 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:13:45,985 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] [2022-11-23 04:13:45,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 04:13:45,985 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 04:13:45,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:13:45,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1684127923, now seen corresponding path program 1 times [2022-11-23 04:13:45,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:13:45,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624509132] [2022-11-23 04:13:45,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:13:45,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:13:46,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:13:46,332 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 04:13:46,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:13:46,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624509132] [2022-11-23 04:13:46,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624509132] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 04:13:46,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 04:13:46,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 04:13:46,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879547970] [2022-11-23 04:13:46,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 04:13:46,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 04:13:46,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:13:46,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 04:13:46,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 04:13:46,342 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 650 [2022-11-23 04:13:46,344 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 49 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 297.6666666666667) internal successors, (893), 3 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:46,344 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:13:46,344 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 650 [2022-11-23 04:13:46,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:13:46,806 INFO L130 PetriNetUnfolder]: 1883/2543 cut-off events. [2022-11-23 04:13:46,807 INFO L131 PetriNetUnfolder]: For 1823/1823 co-relation queries the response was YES. [2022-11-23 04:13:46,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6970 conditions, 2543 events. 1883/2543 cut-off events. For 1823/1823 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8393 event pairs, 709 based on Foata normal form. 30/2572 useless extension candidates. Maximal degree in co-relation 6935. Up to 2325 conditions per place. [2022-11-23 04:13:46,824 INFO L137 encePairwiseOnDemand]: 647/650 looper letters, 51 selfloop transitions, 2 changer transitions 9/62 dead transitions. [2022-11-23 04:13:46,824 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 62 transitions, 356 flow [2022-11-23 04:13:46,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 04:13:46,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 04:13:46,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 913 transitions. [2022-11-23 04:13:46,827 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4682051282051282 [2022-11-23 04:13:46,828 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 913 transitions. [2022-11-23 04:13:46,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 913 transitions. [2022-11-23 04:13:46,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:13:46,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 913 transitions. [2022-11-23 04:13:46,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 304.3333333333333) internal successors, (913), 3 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:46,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 650.0) internal successors, (2600), 4 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:46,835 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 650.0) internal successors, (2600), 4 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:46,835 INFO L175 Difference]: Start difference. First operand has 60 places, 49 transitions, 200 flow. Second operand 3 states and 913 transitions. [2022-11-23 04:13:46,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 62 transitions, 356 flow [2022-11-23 04:13:46,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 62 transitions, 342 flow, removed 2 selfloop flow, removed 4 redundant places. [2022-11-23 04:13:46,842 INFO L231 Difference]: Finished difference. Result has 59 places, 50 transitions, 200 flow [2022-11-23 04:13:46,843 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=650, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=59, PETRI_TRANSITIONS=50} [2022-11-23 04:13:46,843 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 13 predicate places. [2022-11-23 04:13:46,843 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 50 transitions, 200 flow [2022-11-23 04:13:46,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 297.6666666666667) internal successors, (893), 3 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:46,844 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:13:46,844 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] [2022-11-23 04:13:46,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 04:13:46,845 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 04:13:46,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:13:46,845 INFO L85 PathProgramCache]: Analyzing trace with hash -339962236, now seen corresponding path program 1 times [2022-11-23 04:13:46,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:13:46,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95252923] [2022-11-23 04:13:46,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:13:46,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:13:47,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:13:47,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 04:13:47,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:13:47,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95252923] [2022-11-23 04:13:47,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95252923] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 04:13:47,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 04:13:47,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 04:13:47,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351968356] [2022-11-23 04:13:47,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 04:13:47,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 04:13:47,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:13:47,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 04:13:47,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 04:13:47,266 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 650 [2022-11-23 04:13:47,276 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 50 transitions, 200 flow. Second operand has 5 states, 5 states have (on average 291.4) internal successors, (1457), 5 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:47,281 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:13:47,282 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 650 [2022-11-23 04:13:47,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:13:48,513 INFO L130 PetriNetUnfolder]: 5057/6765 cut-off events. [2022-11-23 04:13:48,513 INFO L131 PetriNetUnfolder]: For 5275/5275 co-relation queries the response was YES. [2022-11-23 04:13:48,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19325 conditions, 6765 events. 5057/6765 cut-off events. For 5275/5275 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 26257 event pairs, 1639 based on Foata normal form. 198/6962 useless extension candidates. Maximal degree in co-relation 19293. Up to 2697 conditions per place. [2022-11-23 04:13:48,562 INFO L137 encePairwiseOnDemand]: 643/650 looper letters, 89 selfloop transitions, 12 changer transitions 0/101 dead transitions. [2022-11-23 04:13:48,562 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 101 transitions, 580 flow [2022-11-23 04:13:48,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 04:13:48,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 04:13:48,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1227 transitions. [2022-11-23 04:13:48,566 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47192307692307695 [2022-11-23 04:13:48,567 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1227 transitions. [2022-11-23 04:13:48,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1227 transitions. [2022-11-23 04:13:48,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:13:48,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1227 transitions. [2022-11-23 04:13:48,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 306.75) internal successors, (1227), 4 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:48,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 650.0) internal successors, (3250), 5 states have internal predecessors, (3250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:48,576 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 650.0) internal successors, (3250), 5 states have internal predecessors, (3250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:48,576 INFO L175 Difference]: Start difference. First operand has 59 places, 50 transitions, 200 flow. Second operand 4 states and 1227 transitions. [2022-11-23 04:13:48,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 101 transitions, 580 flow [2022-11-23 04:13:48,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 101 transitions, 576 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-23 04:13:48,585 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 296 flow [2022-11-23 04:13:48,585 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=650, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=296, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2022-11-23 04:13:48,587 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 17 predicate places. [2022-11-23 04:13:48,587 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 296 flow [2022-11-23 04:13:48,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 291.4) internal successors, (1457), 5 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:48,588 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:13:48,588 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-23 04:13:48,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 04:13:48,588 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 04:13:48,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:13:48,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1923168046, now seen corresponding path program 1 times [2022-11-23 04:13:48,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:13:48,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42604038] [2022-11-23 04:13:48,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:13:48,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:13:48,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:13:48,973 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 04:13:48,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:13:48,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42604038] [2022-11-23 04:13:48,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42604038] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:13:48,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405797551] [2022-11-23 04:13:48,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:13:48,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:13:48,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:13:48,978 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:13:48,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 04:13:49,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:13:49,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 04:13:49,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:13:49,401 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 04:13:49,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:13:49,516 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 04:13:49,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405797551] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:13:49,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:13:49,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-23 04:13:49,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892883609] [2022-11-23 04:13:49,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:13:49,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 04:13:49,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:13:49,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 04:13:49,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-23 04:13:49,965 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 650 [2022-11-23 04:13:49,969 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 296 flow. Second operand has 12 states, 12 states have (on average 267.1666666666667) internal successors, (3206), 12 states have internal predecessors, (3206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:49,970 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:13:49,970 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 650 [2022-11-23 04:13:49,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:13:51,584 INFO L130 PetriNetUnfolder]: 5288/7161 cut-off events. [2022-11-23 04:13:51,585 INFO L131 PetriNetUnfolder]: For 10302/10302 co-relation queries the response was YES. [2022-11-23 04:13:51,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23567 conditions, 7161 events. 5288/7161 cut-off events. For 10302/10302 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 28288 event pairs, 3732 based on Foata normal form. 16/7175 useless extension candidates. Maximal degree in co-relation 22531. Up to 6765 conditions per place. [2022-11-23 04:13:51,656 INFO L137 encePairwiseOnDemand]: 644/650 looper letters, 57 selfloop transitions, 3 changer transitions 45/105 dead transitions. [2022-11-23 04:13:51,656 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 105 transitions, 663 flow [2022-11-23 04:13:51,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 04:13:51,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 04:13:51,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1659 transitions. [2022-11-23 04:13:51,661 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42538461538461536 [2022-11-23 04:13:51,662 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1659 transitions. [2022-11-23 04:13:51,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1659 transitions. [2022-11-23 04:13:51,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:13:51,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1659 transitions. [2022-11-23 04:13:51,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 276.5) internal successors, (1659), 6 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:51,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 650.0) internal successors, (4550), 7 states have internal predecessors, (4550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:51,673 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 650.0) internal successors, (4550), 7 states have internal predecessors, (4550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:51,674 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 296 flow. Second operand 6 states and 1659 transitions. [2022-11-23 04:13:51,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 105 transitions, 663 flow [2022-11-23 04:13:51,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 105 transitions, 637 flow, removed 13 selfloop flow, removed 0 redundant places. [2022-11-23 04:13:51,768 INFO L231 Difference]: Finished difference. Result has 71 places, 60 transitions, 296 flow [2022-11-23 04:13:51,769 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=650, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=296, PETRI_PLACES=71, PETRI_TRANSITIONS=60} [2022-11-23 04:13:51,769 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 25 predicate places. [2022-11-23 04:13:51,769 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 60 transitions, 296 flow [2022-11-23 04:13:51,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 267.1666666666667) internal successors, (3206), 12 states have internal predecessors, (3206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:51,771 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:13:51,771 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] [2022-11-23 04:13:51,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-23 04:13:51,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-23 04:13:51,982 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 04:13:51,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:13:51,982 INFO L85 PathProgramCache]: Analyzing trace with hash 472613008, now seen corresponding path program 2 times [2022-11-23 04:13:51,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:13:51,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290628559] [2022-11-23 04:13:51,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:13:51,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:13:52,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:13:52,446 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 04:13:52,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:13:52,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290628559] [2022-11-23 04:13:52,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290628559] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:13:52,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123362435] [2022-11-23 04:13:52,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 04:13:52,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:13:52,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:13:52,448 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:13:52,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 04:13:52,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 04:13:52,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:13:52,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 04:13:52,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:13:52,964 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 04:13:52,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:13:53,140 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 04:13:53,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123362435] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:13:53,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:13:53,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-11-23 04:13:53,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080888037] [2022-11-23 04:13:53,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:13:53,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 04:13:53,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:13:53,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 04:13:53,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-11-23 04:13:53,835 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 650 [2022-11-23 04:13:53,839 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 60 transitions, 296 flow. Second operand has 18 states, 18 states have (on average 265.8888888888889) internal successors, (4786), 18 states have internal predecessors, (4786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:53,839 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:13:53,840 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 650 [2022-11-23 04:13:53,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:13:55,420 INFO L130 PetriNetUnfolder]: 5372/7294 cut-off events. [2022-11-23 04:13:55,420 INFO L131 PetriNetUnfolder]: For 8553/8553 co-relation queries the response was YES. [2022-11-23 04:13:55,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23030 conditions, 7294 events. 5372/7294 cut-off events. For 8553/8553 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 28938 event pairs, 3742 based on Foata normal form. 28/7320 useless extension candidates. Maximal degree in co-relation 22991. Up to 6765 conditions per place. [2022-11-23 04:13:55,470 INFO L137 encePairwiseOnDemand]: 644/650 looper letters, 57 selfloop transitions, 4 changer transitions 54/115 dead transitions. [2022-11-23 04:13:55,470 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 115 transitions, 729 flow [2022-11-23 04:13:55,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 04:13:55,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-23 04:13:55,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2193 transitions. [2022-11-23 04:13:55,476 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42173076923076924 [2022-11-23 04:13:55,477 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2193 transitions. [2022-11-23 04:13:55,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2193 transitions. [2022-11-23 04:13:55,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:13:55,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2193 transitions. [2022-11-23 04:13:55,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 274.125) internal successors, (2193), 8 states have internal predecessors, (2193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:55,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 650.0) internal successors, (5850), 9 states have internal predecessors, (5850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:55,490 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 650.0) internal successors, (5850), 9 states have internal predecessors, (5850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:55,491 INFO L175 Difference]: Start difference. First operand has 71 places, 60 transitions, 296 flow. Second operand 8 states and 2193 transitions. [2022-11-23 04:13:55,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 115 transitions, 729 flow [2022-11-23 04:13:55,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 115 transitions, 709 flow, removed 8 selfloop flow, removed 4 redundant places. [2022-11-23 04:13:55,505 INFO L231 Difference]: Finished difference. Result has 76 places, 61 transitions, 316 flow [2022-11-23 04:13:55,505 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=650, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=316, PETRI_PLACES=76, PETRI_TRANSITIONS=61} [2022-11-23 04:13:55,506 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 30 predicate places. [2022-11-23 04:13:55,506 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 61 transitions, 316 flow [2022-11-23 04:13:55,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 265.8888888888889) internal successors, (4786), 18 states have internal predecessors, (4786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:55,507 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:13:55,508 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 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] [2022-11-23 04:13:55,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 04:13:55,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 04:13:55,714 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 04:13:55,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:13:55,715 INFO L85 PathProgramCache]: Analyzing trace with hash 606820036, now seen corresponding path program 3 times [2022-11-23 04:13:55,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:13:55,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965898379] [2022-11-23 04:13:55,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:13:55,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:13:55,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:13:56,280 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 04:13:56,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:13:56,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965898379] [2022-11-23 04:13:56,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965898379] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 04:13:56,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 04:13:56,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 04:13:56,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430173328] [2022-11-23 04:13:56,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 04:13:56,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 04:13:56,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:13:56,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 04:13:56,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 04:13:56,289 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 650 [2022-11-23 04:13:56,290 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 61 transitions, 316 flow. Second operand has 4 states, 4 states have (on average 296.25) internal successors, (1185), 4 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:56,290 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:13:56,290 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 650 [2022-11-23 04:13:56,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:13:59,456 INFO L130 PetriNetUnfolder]: 13427/17893 cut-off events. [2022-11-23 04:13:59,456 INFO L131 PetriNetUnfolder]: For 26545/26545 co-relation queries the response was YES. [2022-11-23 04:13:59,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58968 conditions, 17893 events. 13427/17893 cut-off events. For 26545/26545 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 79225 event pairs, 4021 based on Foata normal form. 448/18340 useless extension candidates. Maximal degree in co-relation 58922. Up to 6249 conditions per place. [2022-11-23 04:13:59,617 INFO L137 encePairwiseOnDemand]: 647/650 looper letters, 125 selfloop transitions, 5 changer transitions 0/130 dead transitions. [2022-11-23 04:13:59,618 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 130 transitions, 916 flow [2022-11-23 04:13:59,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 04:13:59,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 04:13:59,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1235 transitions. [2022-11-23 04:13:59,622 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.475 [2022-11-23 04:13:59,622 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1235 transitions. [2022-11-23 04:13:59,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1235 transitions. [2022-11-23 04:13:59,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:13:59,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1235 transitions. [2022-11-23 04:13:59,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 308.75) internal successors, (1235), 4 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:59,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 650.0) internal successors, (3250), 5 states have internal predecessors, (3250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:59,632 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 650.0) internal successors, (3250), 5 states have internal predecessors, (3250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:59,633 INFO L175 Difference]: Start difference. First operand has 76 places, 61 transitions, 316 flow. Second operand 4 states and 1235 transitions. [2022-11-23 04:13:59,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 130 transitions, 916 flow [2022-11-23 04:13:59,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 130 transitions, 866 flow, removed 22 selfloop flow, removed 6 redundant places. [2022-11-23 04:13:59,665 INFO L231 Difference]: Finished difference. Result has 72 places, 64 transitions, 328 flow [2022-11-23 04:13:59,665 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=650, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=328, PETRI_PLACES=72, PETRI_TRANSITIONS=64} [2022-11-23 04:13:59,666 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 26 predicate places. [2022-11-23 04:13:59,666 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 64 transitions, 328 flow [2022-11-23 04:13:59,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 296.25) internal successors, (1185), 4 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:59,667 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:13:59,667 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-23 04:13:59,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 04:13:59,668 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 04:13:59,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:13:59,668 INFO L85 PathProgramCache]: Analyzing trace with hash 363899808, now seen corresponding path program 1 times [2022-11-23 04:13:59,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:13:59,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630125941] [2022-11-23 04:13:59,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:13:59,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:13:59,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:14:00,292 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 04:14:00,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:14:00,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630125941] [2022-11-23 04:14:00,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630125941] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:14:00,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951134115] [2022-11-23 04:14:00,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:14:00,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:14:00,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:14:00,295 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:14:00,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 04:14:00,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:14:00,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 04:14:00,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:14:00,771 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 04:14:00,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:14:00,906 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 04:14:00,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951134115] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:14:00,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:14:00,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-23 04:14:00,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646449700] [2022-11-23 04:14:00,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:14:00,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 04:14:00,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:14:00,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 04:14:00,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-23 04:14:01,311 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 650 [2022-11-23 04:14:01,314 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 64 transitions, 328 flow. Second operand has 12 states, 12 states have (on average 267.4166666666667) internal successors, (3209), 12 states have internal predecessors, (3209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:14:01,314 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:14:01,314 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 650 [2022-11-23 04:14:01,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:14:05,475 INFO L130 PetriNetUnfolder]: 16238/22147 cut-off events. [2022-11-23 04:14:05,475 INFO L131 PetriNetUnfolder]: For 34135/34135 co-relation queries the response was YES. [2022-11-23 04:14:05,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72432 conditions, 22147 events. 16238/22147 cut-off events. For 34135/34135 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 107417 event pairs, 10503 based on Foata normal form. 1194/23339 useless extension candidates. Maximal degree in co-relation 72381. Up to 17888 conditions per place. [2022-11-23 04:14:05,626 INFO L137 encePairwiseOnDemand]: 643/650 looper letters, 59 selfloop transitions, 6 changer transitions 71/136 dead transitions. [2022-11-23 04:14:05,626 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 136 transitions, 928 flow [2022-11-23 04:14:05,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 04:14:05,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-23 04:14:05,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2459 transitions. [2022-11-23 04:14:05,635 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42034188034188036 [2022-11-23 04:14:05,635 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2459 transitions. [2022-11-23 04:14:05,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2459 transitions. [2022-11-23 04:14:05,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:14:05,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2459 transitions. [2022-11-23 04:14:05,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 273.22222222222223) internal successors, (2459), 9 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:14:05,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 650.0) internal successors, (6500), 10 states have internal predecessors, (6500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:14:05,654 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 650.0) internal successors, (6500), 10 states have internal predecessors, (6500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:14:05,654 INFO L175 Difference]: Start difference. First operand has 72 places, 64 transitions, 328 flow. Second operand 9 states and 2459 transitions. [2022-11-23 04:14:05,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 136 transitions, 928 flow [2022-11-23 04:14:05,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 136 transitions, 918 flow, removed 5 selfloop flow, removed 0 redundant places. [2022-11-23 04:14:05,683 INFO L231 Difference]: Finished difference. Result has 83 places, 65 transitions, 352 flow [2022-11-23 04:14:05,683 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=650, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=352, PETRI_PLACES=83, PETRI_TRANSITIONS=65} [2022-11-23 04:14:05,684 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 37 predicate places. [2022-11-23 04:14:05,684 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 65 transitions, 352 flow [2022-11-23 04:14:05,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 267.4166666666667) internal successors, (3209), 12 states have internal predecessors, (3209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:14:05,686 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:14:05,686 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 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] [2022-11-23 04:14:05,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 04:14:05,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:14:05,895 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 04:14:05,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:14:05,895 INFO L85 PathProgramCache]: Analyzing trace with hash 709332760, now seen corresponding path program 2 times [2022-11-23 04:14:05,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:14:05,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099894945] [2022-11-23 04:14:05,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:14:05,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:14:06,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:14:16,782 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:14:16,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:14:16,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099894945] [2022-11-23 04:14:16,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099894945] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:14:16,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574357766] [2022-11-23 04:14:16,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 04:14:16,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:14:16,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:14:16,784 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:14:16,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 04:14:17,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 04:14:17,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:14:17,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 131 conjunts are in the unsatisfiable core [2022-11-23 04:14:17,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:14:18,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 04:14:18,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 04:14:18,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 04:14:18,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 04:14:18,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 04:14:21,683 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 04:14:21,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:15:28,441 WARN L233 SmtUtils]: Spent 1.01m on a formula simplification. DAG size of input: 57 DAG size of output: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 04:15:44,804 WARN L233 SmtUtils]: Spent 16.12s on a formula simplification that was a NOOP. DAG size: 56 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 04:17:00,051 WARN L233 SmtUtils]: Spent 1.25m on a formula simplification. DAG size of input: 70 DAG size of output: 67 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 04:18:01,307 WARN L233 SmtUtils]: Spent 1.01m on a formula simplification. DAG size of input: 79 DAG size of output: 76 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 04:18:27,703 WARN L233 SmtUtils]: Spent 26.16s on a formula simplification that was a NOOP. DAG size: 86 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 04:19:28,350 WARN L233 SmtUtils]: Spent 58.35s on a formula simplification that was a NOOP. DAG size: 97 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 04:23:58,946 WARN L233 SmtUtils]: Spent 4.43m on a formula simplification. DAG size of input: 107 DAG size of output: 104 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 04:25:53,211 WARN L230 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-11-23 04:25:53,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2022-11-23 04:25:53,214 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-11-23 04:25:53,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 04:25:53,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:25:53,415 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:620) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:120) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:370) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:649) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:184) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:198) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:361) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:306) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:582) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:342) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) ... 53 more [2022-11-23 04:25:53,417 INFO L158 Benchmark]: Toolchain (without parser) took 757844.71ms. Allocated memory was 132.1MB in the beginning and 3.2GB in the end (delta: 3.0GB). Free memory was 68.3MB in the beginning and 2.5GB in the end (delta: -2.5GB). Peak memory consumption was 557.0MB. Max. memory is 16.1GB. [2022-11-23 04:25:53,417 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 132.1MB. Free memory is still 99.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 04:25:53,419 INFO L158 Benchmark]: CACSL2BoogieTranslator took 475.14ms. Allocated memory was 132.1MB in the beginning and 199.2MB in the end (delta: 67.1MB). Free memory was 68.1MB in the beginning and 162.3MB in the end (delta: -94.2MB). Peak memory consumption was 9.6MB. Max. memory is 16.1GB. [2022-11-23 04:25:53,419 INFO L158 Benchmark]: Boogie Procedure Inliner took 89.21ms. Allocated memory is still 199.2MB. Free memory was 162.3MB in the beginning and 158.4MB in the end (delta: 3.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-23 04:25:53,420 INFO L158 Benchmark]: Boogie Preprocessor took 49.28ms. Allocated memory is still 199.2MB. Free memory was 158.4MB in the beginning and 156.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 04:25:53,420 INFO L158 Benchmark]: RCFGBuilder took 1383.27ms. Allocated memory is still 199.2MB. Free memory was 156.3MB in the beginning and 145.4MB in the end (delta: 10.9MB). Peak memory consumption was 60.8MB. Max. memory is 16.1GB. [2022-11-23 04:25:53,420 INFO L158 Benchmark]: TraceAbstraction took 755839.16ms. Allocated memory was 199.2MB in the beginning and 3.2GB in the end (delta: 3.0GB). Free memory was 145.4MB in the beginning and 2.5GB in the end (delta: -2.4GB). Peak memory consumption was 567.3MB. Max. memory is 16.1GB. [2022-11-23 04:25:53,422 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 132.1MB. Free memory is still 99.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 475.14ms. Allocated memory was 132.1MB in the beginning and 199.2MB in the end (delta: 67.1MB). Free memory was 68.1MB in the beginning and 162.3MB in the end (delta: -94.2MB). Peak memory consumption was 9.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 89.21ms. Allocated memory is still 199.2MB. Free memory was 162.3MB in the beginning and 158.4MB in the end (delta: 3.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 49.28ms. Allocated memory is still 199.2MB. Free memory was 158.4MB in the beginning and 156.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1383.27ms. Allocated memory is still 199.2MB. Free memory was 156.3MB in the beginning and 145.4MB in the end (delta: 10.9MB). Peak memory consumption was 60.8MB. Max. memory is 16.1GB. * TraceAbstraction took 755839.16ms. Allocated memory was 199.2MB in the beginning and 3.2GB in the end (delta: 3.0GB). Free memory was 145.4MB in the beginning and 2.5GB in the end (delta: -2.4GB). Peak memory consumption was 567.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 17.0s, 299 PlacesBefore, 46 PlacesAfterwards, 311 TransitionsBefore, 41 TransitionsAfterwards, 2544 CoEnabledTransitionPairs, 8 FixpointIterations, 212 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 48 TrivialYvCompositions, 13 ConcurrentYvCompositions, 17 ChoiceCompositions, 322 TotalNumberOfCompositions, 6074 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3425, independent: 3266, independent conditional: 0, independent unconditional: 3266, dependent: 159, dependent conditional: 0, dependent unconditional: 159, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1875, independent: 1819, independent conditional: 0, independent unconditional: 1819, dependent: 56, dependent conditional: 0, dependent unconditional: 56, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1875, independent: 1802, independent conditional: 0, independent unconditional: 1802, dependent: 73, dependent conditional: 0, dependent unconditional: 73, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 73, independent: 17, independent conditional: 0, independent unconditional: 17, dependent: 56, dependent conditional: 0, dependent unconditional: 56, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 657, independent: 270, independent conditional: 0, independent unconditional: 270, dependent: 386, dependent conditional: 0, dependent unconditional: 386, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 3425, independent: 1447, independent conditional: 0, independent unconditional: 1447, dependent: 103, dependent conditional: 0, dependent unconditional: 103, unknown: 1875, unknown conditional: 0, unknown unconditional: 1875] , Statistics on independence cache: Total cache size (in pairs): 211, Positive cache size: 193, Positive conditional cache size: 0, Positive unconditional cache size: 193, Negative cache size: 18, Negative conditional cache size: 0, Negative unconditional cache size: 18, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-commit-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS --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 f484a00c18d1df7ceedc12992e35584262ebeacdaf88de41be4bc57f4fb5401d --- 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-4e7fbc6 [2022-11-23 04:25:55,790 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 04:25:55,793 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 04:25:55,839 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 04:25:55,841 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 04:25:55,846 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 04:25:55,848 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 04:25:55,854 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 04:25:55,856 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 04:25:55,857 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 04:25:55,859 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 04:25:55,861 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 04:25:55,863 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 04:25:55,866 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 04:25:55,868 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 04:25:55,871 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 04:25:55,873 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 04:25:55,880 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 04:25:55,881 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 04:25:55,883 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 04:25:55,887 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 04:25:55,888 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 04:25:55,894 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 04:25:55,895 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 04:25:55,898 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 04:25:55,903 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 04:25:55,904 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 04:25:55,905 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 04:25:55,905 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 04:25:55,906 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 04:25:55,907 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 04:25:55,909 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 04:25:55,910 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 04:25:55,911 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 04:25:55,912 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 04:25:55,913 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 04:25:55,914 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 04:25:55,915 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 04:25:55,915 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 04:25:55,916 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 04:25:55,916 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 04:25:55,917 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-11-23 04:25:55,955 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 04:25:55,956 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 04:25:55,957 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 04:25:55,957 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 04:25:55,958 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 04:25:55,958 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 04:25:55,959 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 04:25:55,959 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 04:25:55,960 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 04:25:55,960 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 04:25:55,961 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 04:25:55,961 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 04:25:55,961 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 04:25:55,962 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 04:25:55,962 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 04:25:55,962 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 04:25:55,962 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 04:25:55,963 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-23 04:25:55,963 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-23 04:25:55,963 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 04:25:55,963 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 04:25:55,963 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 04:25:55,964 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 04:25:55,964 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 04:25:55,964 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 04:25:55,964 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 04:25:55,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 04:25:55,965 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 04:25:55,965 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 04:25:55,965 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 04:25:55,966 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-23 04:25:55,966 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-23 04:25:55,970 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 04:25:55,971 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 04:25:55,971 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 04:25:55,971 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 04:25:55,971 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-11-23 04:25:55,971 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f484a00c18d1df7ceedc12992e35584262ebeacdaf88de41be4bc57f4fb5401d [2022-11-23 04:25:56,375 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 04:25:56,396 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 04:25:56,399 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 04:25:56,400 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 04:25:56,401 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 04:25:56,402 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/weaver/popl20-commit-2.wvr.c [2022-11-23 04:25:59,536 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 04:25:59,778 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 04:25:59,779 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/sv-benchmarks/c/weaver/popl20-commit-2.wvr.c [2022-11-23 04:25:59,786 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/data/95a8d470d/138e76167777447f9297530f432cbf49/FLAG4954cb3d1 [2022-11-23 04:25:59,800 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/data/95a8d470d/138e76167777447f9297530f432cbf49 [2022-11-23 04:25:59,803 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 04:25:59,804 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 04:25:59,805 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 04:25:59,806 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 04:25:59,816 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 04:25:59,817 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:25:59" (1/1) ... [2022-11-23 04:25:59,819 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e9319be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:25:59, skipping insertion in model container [2022-11-23 04:25:59,819 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:25:59" (1/1) ... [2022-11-23 04:25:59,827 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 04:25:59,866 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 04:26:00,052 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/sv-benchmarks/c/weaver/popl20-commit-2.wvr.c[5846,5859] [2022-11-23 04:26:00,077 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 04:26:00,100 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-23 04:26:00,113 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 04:26:00,168 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/sv-benchmarks/c/weaver/popl20-commit-2.wvr.c[5846,5859] [2022-11-23 04:26:00,174 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 04:26:00,191 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 04:26:00,232 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/sv-benchmarks/c/weaver/popl20-commit-2.wvr.c[5846,5859] [2022-11-23 04:26:00,247 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 04:26:00,266 INFO L208 MainTranslator]: Completed translation [2022-11-23 04:26:00,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:26:00 WrapperNode [2022-11-23 04:26:00,267 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 04:26:00,270 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 04:26:00,270 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 04:26:00,270 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 04:26:00,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:26:00" (1/1) ... [2022-11-23 04:26:00,303 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:26:00" (1/1) ... [2022-11-23 04:26:00,356 INFO L138 Inliner]: procedures = 28, calls = 93, calls flagged for inlining = 27, calls inlined = 33, statements flattened = 442 [2022-11-23 04:26:00,363 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 04:26:00,364 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 04:26:00,365 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 04:26:00,365 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 04:26:00,374 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:26:00" (1/1) ... [2022-11-23 04:26:00,375 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:26:00" (1/1) ... [2022-11-23 04:26:00,397 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:26:00" (1/1) ... [2022-11-23 04:26:00,397 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:26:00" (1/1) ... [2022-11-23 04:26:00,451 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:26:00" (1/1) ... [2022-11-23 04:26:00,456 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:26:00" (1/1) ... [2022-11-23 04:26:00,458 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:26:00" (1/1) ... [2022-11-23 04:26:00,460 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:26:00" (1/1) ... [2022-11-23 04:26:00,463 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 04:26:00,479 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 04:26:00,479 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 04:26:00,479 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 04:26:00,480 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:26:00" (1/1) ... [2022-11-23 04:26:00,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 04:26:00,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:26:00,520 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 04:26:00,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 04:26:00,578 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 04:26:00,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-23 04:26:00,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 04:26:00,579 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-23 04:26:00,579 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-23 04:26:00,579 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-23 04:26:00,580 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-23 04:26:00,580 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-23 04:26:00,580 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-23 04:26:00,580 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-23 04:26:00,581 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-23 04:26:00,581 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-23 04:26:00,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-23 04:26:00,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-23 04:26:00,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 04:26:00,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 04:26:00,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 04:26:00,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 04:26:00,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-23 04:26:00,585 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 04:26:00,791 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 04:26:00,793 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 04:26:01,657 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 04:26:02,041 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 04:26:02,041 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2022-11-23 04:26:02,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:26:02 BoogieIcfgContainer [2022-11-23 04:26:02,047 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 04:26:02,050 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 04:26:02,051 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 04:26:02,054 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 04:26:02,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:25:59" (1/3) ... [2022-11-23 04:26:02,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@578edd54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:26:02, skipping insertion in model container [2022-11-23 04:26:02,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:26:00" (2/3) ... [2022-11-23 04:26:02,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@578edd54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:26:02, skipping insertion in model container [2022-11-23 04:26:02,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:26:02" (3/3) ... [2022-11-23 04:26:02,060 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-commit-2.wvr.c [2022-11-23 04:26:02,070 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-23 04:26:02,081 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 04:26:02,081 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 04:26:02,081 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 04:26:02,210 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-23 04:26:02,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 302 places, 314 transitions, 660 flow [2022-11-23 04:26:02,457 INFO L130 PetriNetUnfolder]: 25/310 cut-off events. [2022-11-23 04:26:02,458 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-23 04:26:02,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327 conditions, 310 events. 25/310 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 176 event pairs, 0 based on Foata normal form. 0/284 useless extension candidates. Maximal degree in co-relation 270. Up to 2 conditions per place. [2022-11-23 04:26:02,466 INFO L82 GeneralOperation]: Start removeDead. Operand has 302 places, 314 transitions, 660 flow [2022-11-23 04:26:02,477 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 285 places, 297 transitions, 618 flow [2022-11-23 04:26:02,482 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 04:26:02,509 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 285 places, 297 transitions, 618 flow [2022-11-23 04:26:02,514 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 285 places, 297 transitions, 618 flow [2022-11-23 04:26:02,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 285 places, 297 transitions, 618 flow [2022-11-23 04:26:02,581 INFO L130 PetriNetUnfolder]: 25/297 cut-off events. [2022-11-23 04:26:02,581 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-23 04:26:02,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 297 events. 25/297 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 178 event pairs, 0 based on Foata normal form. 0/272 useless extension candidates. Maximal degree in co-relation 270. Up to 2 conditions per place. [2022-11-23 04:26:02,587 INFO L119 LiptonReduction]: Number of co-enabled transitions 2544 [2022-11-23 04:26:38,860 WARN L233 SmtUtils]: Spent 5.14s on a formula simplification. DAG size of input: 155 DAG size of output: 152 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-23 04:26:49,714 WARN L233 SmtUtils]: Spent 8.54s on a formula simplification. DAG size of input: 161 DAG size of output: 158 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-23 04:26:52,285 INFO L134 LiptonReduction]: Checked pairs total: 6074 [2022-11-23 04:26:52,285 INFO L136 LiptonReduction]: Total number of compositions: 308 [2022-11-23 04:26:52,299 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 04:26:52,312 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;@7b6248ea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 04:26:52,313 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-23 04:26:52,326 INFO L130 PetriNetUnfolder]: 8/40 cut-off events. [2022-11-23 04:26:52,326 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-23 04:26:52,327 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:26:52,327 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] [2022-11-23 04:26:52,328 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 04:26:52,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:26:52,333 INFO L85 PathProgramCache]: Analyzing trace with hash -47064139, now seen corresponding path program 1 times [2022-11-23 04:26:52,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 04:26:52,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1853672455] [2022-11-23 04:26:52,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:26:52,348 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 04:26:52,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 04:26:52,354 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 04:26:52,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-23 04:26:52,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:26:52,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 04:26:52,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:26:52,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:26:52,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 04:26:52,741 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 04:26:52,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1853672455] [2022-11-23 04:26:52,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1853672455] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 04:26:52,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 04:26:52,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 04:26:52,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351257472] [2022-11-23 04:26:52,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 04:26:52,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 04:26:52,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 04:26:52,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 04:26:52,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 04:26:52,795 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 622 [2022-11-23 04:26:52,801 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 282.3333333333333) internal successors, (847), 3 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:26:52,802 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:26:52,802 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 622 [2022-11-23 04:26:52,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:26:53,718 INFO L130 PetriNetUnfolder]: 2346/3110 cut-off events. [2022-11-23 04:26:53,719 INFO L131 PetriNetUnfolder]: For 225/225 co-relation queries the response was YES. [2022-11-23 04:26:53,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6500 conditions, 3110 events. 2346/3110 cut-off events. For 225/225 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 11957 event pairs, 381 based on Foata normal form. 1/2317 useless extension candidates. Maximal degree in co-relation 5552. Up to 2810 conditions per place. [2022-11-23 04:26:53,739 INFO L137 encePairwiseOnDemand]: 616/622 looper letters, 58 selfloop transitions, 5 changer transitions 1/64 dead transitions. [2022-11-23 04:26:53,739 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 64 transitions, 301 flow [2022-11-23 04:26:53,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 04:26:53,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 04:26:53,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 887 transitions. [2022-11-23 04:26:53,768 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4753483386923901 [2022-11-23 04:26:53,769 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 887 transitions. [2022-11-23 04:26:53,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 887 transitions. [2022-11-23 04:26:53,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:26:53,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 887 transitions. [2022-11-23 04:26:53,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 295.6666666666667) internal successors, (887), 3 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:26:53,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 622.0) internal successors, (2488), 4 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:26:53,797 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 622.0) internal successors, (2488), 4 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:26:53,798 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 106 flow. Second operand 3 states and 887 transitions. [2022-11-23 04:26:53,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 64 transitions, 301 flow [2022-11-23 04:26:53,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 64 transitions, 271 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-11-23 04:26:53,808 INFO L231 Difference]: Finished difference. Result has 41 places, 45 transitions, 123 flow [2022-11-23 04:26:53,810 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=622, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=123, PETRI_PLACES=41, PETRI_TRANSITIONS=45} [2022-11-23 04:26:53,814 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, -5 predicate places. [2022-11-23 04:26:53,814 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 45 transitions, 123 flow [2022-11-23 04:26:53,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 282.3333333333333) internal successors, (847), 3 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:26:53,815 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:26:53,815 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] [2022-11-23 04:26:53,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-23 04:26:54,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 04:26:54,034 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 04:26:54,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:26:54,035 INFO L85 PathProgramCache]: Analyzing trace with hash 844189379, now seen corresponding path program 1 times [2022-11-23 04:26:54,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 04:26:54,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1981995560] [2022-11-23 04:26:54,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:26:54,036 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 04:26:54,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 04:26:54,041 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 04:26:54,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-23 04:26:54,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:26:54,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 04:26:54,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:26:54,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:26:54,359 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 04:26:54,359 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 04:26:54,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1981995560] [2022-11-23 04:26:54,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1981995560] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 04:26:54,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 04:26:54,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 04:26:54,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272339926] [2022-11-23 04:26:54,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 04:26:54,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 04:26:54,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 04:26:54,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 04:26:54,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 04:26:54,370 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 622 [2022-11-23 04:26:54,372 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 45 transitions, 123 flow. Second operand has 3 states, 3 states have (on average 281.0) internal successors, (843), 3 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:26:54,372 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:26:54,372 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 622 [2022-11-23 04:26:54,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:26:55,438 INFO L130 PetriNetUnfolder]: 3014/4054 cut-off events. [2022-11-23 04:26:55,438 INFO L131 PetriNetUnfolder]: For 847/847 co-relation queries the response was YES. [2022-11-23 04:26:55,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9319 conditions, 4054 events. 3014/4054 cut-off events. For 847/847 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 15182 event pairs, 885 based on Foata normal form. 170/3972 useless extension candidates. Maximal degree in co-relation 6914. Up to 2700 conditions per place. [2022-11-23 04:26:55,458 INFO L137 encePairwiseOnDemand]: 619/622 looper letters, 68 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2022-11-23 04:26:55,459 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 70 transitions, 325 flow [2022-11-23 04:26:55,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 04:26:55,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 04:26:55,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 884 transitions. [2022-11-23 04:26:55,462 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4737406216505895 [2022-11-23 04:26:55,463 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 884 transitions. [2022-11-23 04:26:55,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 884 transitions. [2022-11-23 04:26:55,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:26:55,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 884 transitions. [2022-11-23 04:26:55,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 294.6666666666667) internal successors, (884), 3 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:26:55,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 622.0) internal successors, (2488), 4 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:26:55,472 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 622.0) internal successors, (2488), 4 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:26:55,472 INFO L175 Difference]: Start difference. First operand has 41 places, 45 transitions, 123 flow. Second operand 3 states and 884 transitions. [2022-11-23 04:26:55,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 70 transitions, 325 flow [2022-11-23 04:26:55,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 70 transitions, 321 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 04:26:55,476 INFO L231 Difference]: Finished difference. Result has 43 places, 45 transitions, 126 flow [2022-11-23 04:26:55,476 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=622, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=43, PETRI_TRANSITIONS=45} [2022-11-23 04:26:55,477 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, -3 predicate places. [2022-11-23 04:26:55,477 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 45 transitions, 126 flow [2022-11-23 04:26:55,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 281.0) internal successors, (843), 3 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:26:55,478 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:26:55,480 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] [2022-11-23 04:26:55,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-23 04:26:55,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 04:26:55,693 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 04:26:55,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:26:55,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1389320538, now seen corresponding path program 1 times [2022-11-23 04:26:55,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 04:26:55,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [430637337] [2022-11-23 04:26:55,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:26:55,701 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 04:26:55,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 04:26:55,703 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 04:26:55,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-23 04:26:55,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:26:55,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 04:26:55,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:26:55,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:26:55,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 04:26:55,960 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 04:26:55,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [430637337] [2022-11-23 04:26:55,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [430637337] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 04:26:55,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 04:26:55,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 04:26:55,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177800236] [2022-11-23 04:26:55,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 04:26:55,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 04:26:55,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 04:26:55,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 04:26:55,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 04:26:55,972 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 622 [2022-11-23 04:26:55,973 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 45 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 281.0) internal successors, (843), 3 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:26:55,973 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:26:55,973 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 622 [2022-11-23 04:26:55,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:26:56,969 INFO L130 PetriNetUnfolder]: 2676/3626 cut-off events. [2022-11-23 04:26:56,969 INFO L131 PetriNetUnfolder]: For 939/939 co-relation queries the response was YES. [2022-11-23 04:26:56,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8552 conditions, 3626 events. 2676/3626 cut-off events. For 939/939 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13794 event pairs, 785 based on Foata normal form. 102/3492 useless extension candidates. Maximal degree in co-relation 2045. Up to 2890 conditions per place. [2022-11-23 04:26:56,988 INFO L137 encePairwiseOnDemand]: 619/622 looper letters, 65 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2022-11-23 04:26:56,988 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 67 transitions, 315 flow [2022-11-23 04:26:56,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 04:26:56,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 04:26:56,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 881 transitions. [2022-11-23 04:26:56,991 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4721329046087889 [2022-11-23 04:26:56,992 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 881 transitions. [2022-11-23 04:26:56,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 881 transitions. [2022-11-23 04:26:56,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:26:56,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 881 transitions. [2022-11-23 04:26:56,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 293.6666666666667) internal successors, (881), 3 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:26:56,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 622.0) internal successors, (2488), 4 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:26:57,000 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 622.0) internal successors, (2488), 4 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:26:57,001 INFO L175 Difference]: Start difference. First operand has 43 places, 45 transitions, 126 flow. Second operand 3 states and 881 transitions. [2022-11-23 04:26:57,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 67 transitions, 315 flow [2022-11-23 04:26:57,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 67 transitions, 313 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 04:26:57,006 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 132 flow [2022-11-23 04:26:57,010 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=622, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2022-11-23 04:26:57,011 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, -1 predicate places. [2022-11-23 04:26:57,011 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 132 flow [2022-11-23 04:26:57,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 281.0) internal successors, (843), 3 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:26:57,012 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:26:57,013 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] [2022-11-23 04:26:57,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-23 04:26:57,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 04:26:57,229 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 04:26:57,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:26:57,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1589482813, now seen corresponding path program 1 times [2022-11-23 04:26:57,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 04:26:57,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [656693664] [2022-11-23 04:26:57,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:26:57,235 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 04:26:57,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 04:26:57,236 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 04:26:57,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-23 04:26:57,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:26:57,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 04:26:57,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:26:57,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:26:57,515 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 04:26:57,516 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 04:26:57,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [656693664] [2022-11-23 04:26:57,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [656693664] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 04:26:57,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 04:26:57,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 04:26:57,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270850841] [2022-11-23 04:26:57,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 04:26:57,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 04:26:57,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 04:26:57,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 04:26:57,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 04:26:57,525 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 622 [2022-11-23 04:26:57,527 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 281.0) internal successors, (843), 3 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:26:57,527 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:26:57,527 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 622 [2022-11-23 04:26:57,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:26:58,721 INFO L130 PetriNetUnfolder]: 3151/4249 cut-off events. [2022-11-23 04:26:58,721 INFO L131 PetriNetUnfolder]: For 1702/1702 co-relation queries the response was YES. [2022-11-23 04:26:58,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10352 conditions, 4249 events. 3151/4249 cut-off events. For 1702/1702 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 15843 event pairs, 896 based on Foata normal form. 104/4093 useless extension candidates. Maximal degree in co-relation 9253. Up to 2724 conditions per place. [2022-11-23 04:26:58,743 INFO L137 encePairwiseOnDemand]: 619/622 looper letters, 60 selfloop transitions, 2 changer transitions 8/70 dead transitions. [2022-11-23 04:26:58,743 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 70 transitions, 335 flow [2022-11-23 04:26:58,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 04:26:58,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 04:26:58,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 887 transitions. [2022-11-23 04:26:58,746 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4753483386923901 [2022-11-23 04:26:58,746 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 887 transitions. [2022-11-23 04:26:58,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 887 transitions. [2022-11-23 04:26:58,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:26:58,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 887 transitions. [2022-11-23 04:26:58,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 295.6666666666667) internal successors, (887), 3 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:26:58,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 622.0) internal successors, (2488), 4 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:26:58,755 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 622.0) internal successors, (2488), 4 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:26:58,755 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 132 flow. Second operand 3 states and 887 transitions. [2022-11-23 04:26:58,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 70 transitions, 335 flow [2022-11-23 04:26:58,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 70 transitions, 333 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 04:26:58,758 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 138 flow [2022-11-23 04:26:58,758 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=622, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2022-11-23 04:26:58,759 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 1 predicate places. [2022-11-23 04:26:58,759 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 138 flow [2022-11-23 04:26:58,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 281.0) internal successors, (843), 3 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:26:58,760 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:26:58,760 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] [2022-11-23 04:26:58,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-11-23 04:26:58,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 04:26:58,973 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 04:26:58,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:26:58,973 INFO L85 PathProgramCache]: Analyzing trace with hash 2004060601, now seen corresponding path program 1 times [2022-11-23 04:26:58,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 04:26:58,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1260016665] [2022-11-23 04:26:58,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:26:58,974 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 04:26:58,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 04:26:58,975 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 04:26:58,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-23 04:26:59,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:26:59,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 04:26:59,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:26:59,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:26:59,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 04:26:59,255 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 04:26:59,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1260016665] [2022-11-23 04:26:59,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1260016665] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 04:26:59,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 04:26:59,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 04:26:59,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31715508] [2022-11-23 04:26:59,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 04:26:59,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 04:26:59,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 04:26:59,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 04:26:59,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 04:26:59,266 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 622 [2022-11-23 04:26:59,267 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 282.3333333333333) internal successors, (847), 3 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:26:59,268 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:26:59,268 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 622 [2022-11-23 04:26:59,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:26:59,936 INFO L130 PetriNetUnfolder]: 1883/2539 cut-off events. [2022-11-23 04:26:59,936 INFO L131 PetriNetUnfolder]: For 1280/1280 co-relation queries the response was YES. [2022-11-23 04:26:59,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6357 conditions, 2539 events. 1883/2539 cut-off events. For 1280/1280 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8378 event pairs, 709 based on Foata normal form. 30/2383 useless extension candidates. Maximal degree in co-relation 1515. Up to 2325 conditions per place. [2022-11-23 04:26:59,948 INFO L137 encePairwiseOnDemand]: 619/622 looper letters, 47 selfloop transitions, 2 changer transitions 9/58 dead transitions. [2022-11-23 04:26:59,949 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 58 transitions, 284 flow [2022-11-23 04:26:59,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 04:26:59,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 04:26:59,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 871 transitions. [2022-11-23 04:26:59,952 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4667738478027867 [2022-11-23 04:26:59,952 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 871 transitions. [2022-11-23 04:26:59,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 871 transitions. [2022-11-23 04:26:59,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:26:59,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 871 transitions. [2022-11-23 04:26:59,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 290.3333333333333) internal successors, (871), 3 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:26:59,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 622.0) internal successors, (2488), 4 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:26:59,961 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 622.0) internal successors, (2488), 4 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:26:59,961 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 138 flow. Second operand 3 states and 871 transitions. [2022-11-23 04:26:59,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 58 transitions, 284 flow [2022-11-23 04:26:59,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 58 transitions, 282 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 04:26:59,967 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 148 flow [2022-11-23 04:26:59,967 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=622, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2022-11-23 04:26:59,969 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 3 predicate places. [2022-11-23 04:26:59,970 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 148 flow [2022-11-23 04:26:59,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 282.3333333333333) internal successors, (847), 3 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:26:59,970 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:26:59,971 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] [2022-11-23 04:26:59,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-23 04:27:00,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 04:27:00,183 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 04:27:00,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:27:00,184 INFO L85 PathProgramCache]: Analyzing trace with hash 451335299, now seen corresponding path program 1 times [2022-11-23 04:27:00,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 04:27:00,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1804645470] [2022-11-23 04:27:00,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:27:00,185 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 04:27:00,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 04:27:00,187 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 04:27:00,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-23 04:27:00,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:27:00,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 04:27:00,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:27:00,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 04:27:00,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 04:27:00,611 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 04:27:00,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1804645470] [2022-11-23 04:27:00,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1804645470] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 04:27:00,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 04:27:00,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 04:27:00,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071983337] [2022-11-23 04:27:00,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 04:27:00,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 04:27:00,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 04:27:00,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 04:27:00,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 04:27:00,790 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 622 [2022-11-23 04:27:00,791 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 148 flow. Second operand has 4 states, 4 states have (on average 266.25) internal successors, (1065), 4 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:27:00,791 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:27:00,791 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 622 [2022-11-23 04:27:00,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:27:01,562 INFO L130 PetriNetUnfolder]: 2003/2753 cut-off events. [2022-11-23 04:27:01,562 INFO L131 PetriNetUnfolder]: For 1350/1350 co-relation queries the response was YES. [2022-11-23 04:27:01,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7004 conditions, 2753 events. 2003/2753 cut-off events. For 1350/1350 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 9397 event pairs, 1456 based on Foata normal form. 30/2775 useless extension candidates. Maximal degree in co-relation 3110. Up to 2540 conditions per place. [2022-11-23 04:27:01,582 INFO L137 encePairwiseOnDemand]: 618/622 looper letters, 45 selfloop transitions, 2 changer transitions 26/73 dead transitions. [2022-11-23 04:27:01,583 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 73 transitions, 356 flow [2022-11-23 04:27:01,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 04:27:01,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 04:27:01,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1101 transitions. [2022-11-23 04:27:01,586 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.442524115755627 [2022-11-23 04:27:01,586 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1101 transitions. [2022-11-23 04:27:01,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1101 transitions. [2022-11-23 04:27:01,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:27:01,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1101 transitions. [2022-11-23 04:27:01,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 275.25) internal successors, (1101), 4 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:27:01,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 622.0) internal successors, (3110), 5 states have internal predecessors, (3110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:27:01,597 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 622.0) internal successors, (3110), 5 states have internal predecessors, (3110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:27:01,597 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 148 flow. Second operand 4 states and 1101 transitions. [2022-11-23 04:27:01,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 73 transitions, 356 flow [2022-11-23 04:27:01,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 73 transitions, 354 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 04:27:01,601 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 160 flow [2022-11-23 04:27:01,601 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=622, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=160, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2022-11-23 04:27:01,604 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 7 predicate places. [2022-11-23 04:27:01,604 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 160 flow [2022-11-23 04:27:01,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 266.25) internal successors, (1065), 4 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:27:01,605 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:27:01,605 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] [2022-11-23 04:27:01,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-23 04:27:01,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 04:27:01,823 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 04:27:01,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:27:01,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1807627143, now seen corresponding path program 1 times [2022-11-23 04:27:01,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 04:27:01,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [553703395] [2022-11-23 04:27:01,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:27:01,824 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 04:27:01,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 04:27:01,825 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 04:27:01,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-23 04:27:02,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:27:02,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-23 04:27:02,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:27:02,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:27:02,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:27:03,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:27:03,230 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 04:27:03,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [553703395] [2022-11-23 04:27:03,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [553703395] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:27:03,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 04:27:03,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-11-23 04:27:03,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17113514] [2022-11-23 04:27:03,231 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 04:27:03,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 04:27:03,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 04:27:03,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 04:27:03,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-11-23 04:27:05,225 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 622 [2022-11-23 04:27:05,227 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 160 flow. Second operand has 12 states, 12 states have (on average 250.58333333333334) internal successors, (3007), 12 states have internal predecessors, (3007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:27:05,227 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:27:05,227 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 622 [2022-11-23 04:27:05,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:27:08,611 INFO L130 PetriNetUnfolder]: 5288/7155 cut-off events. [2022-11-23 04:27:08,611 INFO L131 PetriNetUnfolder]: For 4090/4090 co-relation queries the response was YES. [2022-11-23 04:27:08,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18633 conditions, 7155 events. 5288/7155 cut-off events. For 4090/4090 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 28114 event pairs, 1762 based on Foata normal form. 232/7379 useless extension candidates. Maximal degree in co-relation 18611. Up to 2697 conditions per place. [2022-11-23 04:27:08,657 INFO L137 encePairwiseOnDemand]: 613/622 looper letters, 85 selfloop transitions, 14 changer transitions 45/144 dead transitions. [2022-11-23 04:27:08,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 144 transitions, 739 flow [2022-11-23 04:27:08,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 04:27:08,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-23 04:27:08,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2355 transitions. [2022-11-23 04:27:08,666 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42068595927116825 [2022-11-23 04:27:08,667 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2355 transitions. [2022-11-23 04:27:08,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2355 transitions. [2022-11-23 04:27:08,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:27:08,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2355 transitions. [2022-11-23 04:27:08,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 261.6666666666667) internal successors, (2355), 9 states have internal predecessors, (2355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:27:08,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 622.0) internal successors, (6220), 10 states have internal predecessors, (6220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:27:08,684 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 622.0) internal successors, (6220), 10 states have internal predecessors, (6220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:27:08,684 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 160 flow. Second operand 9 states and 2355 transitions. [2022-11-23 04:27:08,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 144 transitions, 739 flow [2022-11-23 04:27:08,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 144 transitions, 731 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-11-23 04:27:08,689 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 256 flow [2022-11-23 04:27:08,689 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=622, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=256, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2022-11-23 04:27:08,690 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 16 predicate places. [2022-11-23 04:27:08,690 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 256 flow [2022-11-23 04:27:08,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 250.58333333333334) internal successors, (3007), 12 states have internal predecessors, (3007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:27:08,691 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:27:08,692 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] [2022-11-23 04:27:08,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-23 04:27:08,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 04:27:08,905 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 04:27:08,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:27:08,906 INFO L85 PathProgramCache]: Analyzing trace with hash -693727113, now seen corresponding path program 1 times [2022-11-23 04:27:08,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 04:27:08,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [225548464] [2022-11-23 04:27:08,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:27:08,907 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 04:27:08,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 04:27:08,908 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 04:27:08,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-23 04:27:09,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:27:09,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-23 04:27:09,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:27:09,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:27:09,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:27:10,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:27:10,968 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 04:27:10,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [225548464] [2022-11-23 04:27:10,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [225548464] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:27:10,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 04:27:10,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-23 04:27:10,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939058998] [2022-11-23 04:27:10,969 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 04:27:10,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-23 04:27:10,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 04:27:10,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-23 04:27:10,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-11-23 04:27:13,454 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 622 [2022-11-23 04:27:13,456 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 256 flow. Second operand has 16 states, 16 states have (on average 250.0) internal successors, (4000), 16 states have internal predecessors, (4000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:27:13,456 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:27:13,456 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 622 [2022-11-23 04:27:13,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:27:16,495 INFO L130 PetriNetUnfolder]: 5372/7288 cut-off events. [2022-11-23 04:27:16,495 INFO L131 PetriNetUnfolder]: For 7069/7069 co-relation queries the response was YES. [2022-11-23 04:27:16,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22431 conditions, 7288 events. 5372/7288 cut-off events. For 7069/7069 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 28282 event pairs, 2218 based on Foata normal form. 28/7308 useless extension candidates. Maximal degree in co-relation 21014. Up to 6547 conditions per place. [2022-11-23 04:27:16,532 INFO L137 encePairwiseOnDemand]: 613/622 looper letters, 55 selfloop transitions, 6 changer transitions 68/129 dead transitions. [2022-11-23 04:27:16,532 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 129 transitions, 737 flow [2022-11-23 04:27:16,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 04:27:16,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-23 04:27:16,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3072 transitions. [2022-11-23 04:27:16,541 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4115755627009646 [2022-11-23 04:27:16,541 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3072 transitions. [2022-11-23 04:27:16,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3072 transitions. [2022-11-23 04:27:16,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:27:16,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3072 transitions. [2022-11-23 04:27:16,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 256.0) internal successors, (3072), 12 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:27:16,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 622.0) internal successors, (8086), 13 states have internal predecessors, (8086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:27:16,562 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 622.0) internal successors, (8086), 13 states have internal predecessors, (8086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:27:16,563 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 256 flow. Second operand 12 states and 3072 transitions. [2022-11-23 04:27:16,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 129 transitions, 737 flow [2022-11-23 04:27:16,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 129 transitions, 721 flow, removed 7 selfloop flow, removed 2 redundant places. [2022-11-23 04:27:16,575 INFO L231 Difference]: Finished difference. Result has 73 places, 58 transitions, 282 flow [2022-11-23 04:27:16,575 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=622, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=282, PETRI_PLACES=73, PETRI_TRANSITIONS=58} [2022-11-23 04:27:16,577 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 27 predicate places. [2022-11-23 04:27:16,578 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 58 transitions, 282 flow [2022-11-23 04:27:16,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 250.0) internal successors, (4000), 16 states have internal predecessors, (4000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:27:16,588 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:27:16,588 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 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] [2022-11-23 04:27:16,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-23 04:27:16,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 04:27:16,802 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 04:27:16,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:27:16,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1514087895, now seen corresponding path program 1 times [2022-11-23 04:27:16,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 04:27:16,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [815990094] [2022-11-23 04:27:16,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:27:16,804 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 04:27:16,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 04:27:16,810 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 04:27:16,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-23 04:27:17,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:27:17,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 04:27:17,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:27:17,372 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 04:27:17,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 04:27:17,373 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 04:27:17,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [815990094] [2022-11-23 04:27:17,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [815990094] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 04:27:17,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 04:27:17,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 04:27:17,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285260784] [2022-11-23 04:27:17,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 04:27:17,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 04:27:17,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 04:27:17,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 04:27:17,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 04:27:17,565 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 622 [2022-11-23 04:27:17,566 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 58 transitions, 282 flow. Second operand has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:27:17,566 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:27:17,566 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 622 [2022-11-23 04:27:17,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:27:18,902 INFO L130 PetriNetUnfolder]: 5639/7675 cut-off events. [2022-11-23 04:27:18,902 INFO L131 PetriNetUnfolder]: For 9878/9878 co-relation queries the response was YES. [2022-11-23 04:27:18,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24550 conditions, 7675 events. 5639/7675 cut-off events. For 9878/9878 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 30728 event pairs, 4101 based on Foata normal form. 54/7724 useless extension candidates. Maximal degree in co-relation 24499. Up to 6760 conditions per place. [2022-11-23 04:27:18,945 INFO L137 encePairwiseOnDemand]: 617/622 looper letters, 56 selfloop transitions, 3 changer transitions 40/99 dead transitions. [2022-11-23 04:27:18,945 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 99 transitions, 648 flow [2022-11-23 04:27:18,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 04:27:18,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 04:27:18,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1109 transitions. [2022-11-23 04:27:18,948 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4457395498392283 [2022-11-23 04:27:18,949 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1109 transitions. [2022-11-23 04:27:18,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1109 transitions. [2022-11-23 04:27:18,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:27:18,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1109 transitions. [2022-11-23 04:27:18,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 277.25) internal successors, (1109), 4 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:27:18,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 622.0) internal successors, (3110), 5 states have internal predecessors, (3110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:27:18,956 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 622.0) internal successors, (3110), 5 states have internal predecessors, (3110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:27:18,957 INFO L175 Difference]: Start difference. First operand has 73 places, 58 transitions, 282 flow. Second operand 4 states and 1109 transitions. [2022-11-23 04:27:18,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 99 transitions, 648 flow [2022-11-23 04:27:18,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 99 transitions, 597 flow, removed 19 selfloop flow, removed 9 redundant places. [2022-11-23 04:27:18,969 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 268 flow [2022-11-23 04:27:18,969 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=622, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=268, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2022-11-23 04:27:18,970 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 18 predicate places. [2022-11-23 04:27:18,970 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 268 flow [2022-11-23 04:27:18,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:27:18,970 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:27:18,971 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 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] [2022-11-23 04:27:18,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-11-23 04:27:19,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 04:27:19,185 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 04:27:19,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:27:19,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1883998327, now seen corresponding path program 1 times [2022-11-23 04:27:19,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 04:27:19,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1302360565] [2022-11-23 04:27:19,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:27:19,186 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 04:27:19,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 04:27:19,187 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 04:27:19,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-23 04:27:19,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:27:19,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 04:27:19,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:27:19,924 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 04:27:19,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:27:20,408 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 04:27:20,408 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 04:27:20,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1302360565] [2022-11-23 04:27:20,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1302360565] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:27:20,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 04:27:20,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-11-23 04:27:20,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804627706] [2022-11-23 04:27:20,409 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 04:27:20,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 04:27:20,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 04:27:20,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 04:27:20,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-11-23 04:27:21,395 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 622 [2022-11-23 04:27:21,397 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 268 flow. Second operand has 10 states, 10 states have (on average 254.9) internal successors, (2549), 10 states have internal predecessors, (2549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:27:21,397 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:27:21,397 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 622 [2022-11-23 04:27:21,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:27:23,960 INFO L130 PetriNetUnfolder]: 6656/9149 cut-off events. [2022-11-23 04:27:23,960 INFO L131 PetriNetUnfolder]: For 9434/9434 co-relation queries the response was YES. [2022-11-23 04:27:23,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27810 conditions, 9149 events. 6656/9149 cut-off events. For 9434/9434 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 38884 event pairs, 4163 based on Foata normal form. 510/9653 useless extension candidates. Maximal degree in co-relation 27765. Up to 6753 conditions per place. [2022-11-23 04:27:24,002 INFO L137 encePairwiseOnDemand]: 615/622 looper letters, 55 selfloop transitions, 5 changer transitions 67/127 dead transitions. [2022-11-23 04:27:24,002 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 127 transitions, 794 flow [2022-11-23 04:27:24,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 04:27:24,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-23 04:27:24,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2083 transitions. [2022-11-23 04:27:24,009 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41860932475884244 [2022-11-23 04:27:24,009 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2083 transitions. [2022-11-23 04:27:24,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2083 transitions. [2022-11-23 04:27:24,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:27:24,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2083 transitions. [2022-11-23 04:27:24,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 260.375) internal successors, (2083), 8 states have internal predecessors, (2083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:27:24,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 622.0) internal successors, (5598), 9 states have internal predecessors, (5598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:27:24,023 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 622.0) internal successors, (5598), 9 states have internal predecessors, (5598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:27:24,023 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 268 flow. Second operand 8 states and 2083 transitions. [2022-11-23 04:27:24,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 127 transitions, 794 flow [2022-11-23 04:27:24,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 127 transitions, 782 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-11-23 04:27:24,036 INFO L231 Difference]: Finished difference. Result has 71 places, 60 transitions, 284 flow [2022-11-23 04:27:24,037 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=622, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=284, PETRI_PLACES=71, PETRI_TRANSITIONS=60} [2022-11-23 04:27:24,038 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 25 predicate places. [2022-11-23 04:27:24,038 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 60 transitions, 284 flow [2022-11-23 04:27:24,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 254.9) internal successors, (2549), 10 states have internal predecessors, (2549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:27:24,039 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:27:24,039 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 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] [2022-11-23 04:27:24,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-23 04:27:24,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 04:27:24,253 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 04:27:24,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:27:24,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1415451063, now seen corresponding path program 2 times [2022-11-23 04:27:24,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 04:27:24,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [132857361] [2022-11-23 04:27:24,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 04:27:24,255 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 04:27:24,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 04:27:24,263 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 04:27:24,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-23 04:27:24,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 04:27:24,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:27:24,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 04:27:24,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:27:25,057 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-23 04:27:25,057 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 04:27:25,057 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 04:27:25,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [132857361] [2022-11-23 04:27:25,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [132857361] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 04:27:25,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 04:27:25,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 04:27:25,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815688589] [2022-11-23 04:27:25,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 04:27:25,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 04:27:25,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 04:27:25,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 04:27:25,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 04:27:25,222 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 622 [2022-11-23 04:27:25,223 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 60 transitions, 284 flow. Second operand has 4 states, 4 states have (on average 267.25) internal successors, (1069), 4 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:27:25,223 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:27:25,223 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 622 [2022-11-23 04:27:25,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:27:26,436 INFO L130 PetriNetUnfolder]: 5243/7082 cut-off events. [2022-11-23 04:27:26,437 INFO L131 PetriNetUnfolder]: For 7956/7956 co-relation queries the response was YES. [2022-11-23 04:27:26,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22126 conditions, 7082 events. 5243/7082 cut-off events. For 7956/7956 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 27734 event pairs, 3794 based on Foata normal form. 8/7087 useless extension candidates. Maximal degree in co-relation 22079. Up to 6758 conditions per place. [2022-11-23 04:27:26,461 INFO L137 encePairwiseOnDemand]: 617/622 looper letters, 58 selfloop transitions, 3 changer transitions 24/85 dead transitions. [2022-11-23 04:27:26,461 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 85 transitions, 527 flow [2022-11-23 04:27:26,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 04:27:26,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 04:27:26,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1099 transitions. [2022-11-23 04:27:26,464 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4417202572347267 [2022-11-23 04:27:26,464 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1099 transitions. [2022-11-23 04:27:26,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1099 transitions. [2022-11-23 04:27:26,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:27:26,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1099 transitions. [2022-11-23 04:27:26,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 274.75) internal successors, (1099), 4 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:27:26,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 622.0) internal successors, (3110), 5 states have internal predecessors, (3110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:27:26,472 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 622.0) internal successors, (3110), 5 states have internal predecessors, (3110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:27:26,472 INFO L175 Difference]: Start difference. First operand has 71 places, 60 transitions, 284 flow. Second operand 4 states and 1099 transitions. [2022-11-23 04:27:26,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 85 transitions, 527 flow [2022-11-23 04:27:26,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 85 transitions, 509 flow, removed 5 selfloop flow, removed 5 redundant places. [2022-11-23 04:27:26,485 INFO L231 Difference]: Finished difference. Result has 69 places, 61 transitions, 285 flow [2022-11-23 04:27:26,485 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=622, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=285, PETRI_PLACES=69, PETRI_TRANSITIONS=61} [2022-11-23 04:27:26,486 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 23 predicate places. [2022-11-23 04:27:26,486 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 61 transitions, 285 flow [2022-11-23 04:27:26,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 267.25) internal successors, (1069), 4 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:27:26,486 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:27:26,487 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 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] [2022-11-23 04:27:26,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-23 04:27:26,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 04:27:26,702 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 04:27:26,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:27:26,703 INFO L85 PathProgramCache]: Analyzing trace with hash -76003064, now seen corresponding path program 1 times [2022-11-23 04:27:26,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 04:27:26,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1067449277] [2022-11-23 04:27:26,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:27:26,703 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 04:27:26,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 04:27:26,704 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 04:27:26,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96249ca8-afbb-4261-80d3-d3b8cf748691/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-23 04:27:27,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:27:27,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-23 04:27:27,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:27:27,573 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 04:27:27,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:27:28,293 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 04:27:28,293 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 04:27:28,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1067449277] [2022-11-23 04:27:28,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1067449277] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:27:28,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 04:27:28,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-11-23 04:27:28,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724675292] [2022-11-23 04:27:28,294 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 04:27:28,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 04:27:28,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 04:27:28,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 04:27:28,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132