./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/14_spin2003.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_75443ea9-28c5-44e1-b389-c29bc15173b6/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75443ea9-28c5-44e1-b389-c29bc15173b6/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75443ea9-28c5-44e1-b389-c29bc15173b6/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75443ea9-28c5-44e1-b389-c29bc15173b6/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/14_spin2003.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75443ea9-28c5-44e1-b389-c29bc15173b6/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75443ea9-28c5-44e1-b389-c29bc15173b6/bin/uautomizer-ZsLfNo2U6R --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 f5ed9d077a05ec08544f0d3c902eb6b5aa6ad768c4ec69a1caaef2b54748a07e --- 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-38b53e6 [2022-11-25 18:20:36,568 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:20:36,570 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:20:36,592 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:20:36,592 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:20:36,593 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:20:36,595 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:20:36,596 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:20:36,598 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:20:36,599 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:20:36,600 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:20:36,601 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:20:36,602 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:20:36,605 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:20:36,606 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:20:36,607 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:20:36,608 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:20:36,609 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:20:36,610 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:20:36,612 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:20:36,613 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:20:36,622 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:20:36,623 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:20:36,624 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:20:36,627 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:20:36,628 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:20:36,628 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:20:36,629 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:20:36,629 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:20:36,630 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:20:36,631 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:20:36,632 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:20:36,632 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:20:36,633 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:20:36,634 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:20:36,635 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:20:36,643 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:20:36,643 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:20:36,644 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:20:36,647 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:20:36,648 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:20:36,649 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75443ea9-28c5-44e1-b389-c29bc15173b6/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 18:20:36,707 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:20:36,707 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:20:36,708 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:20:36,708 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:20:36,709 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:20:36,709 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:20:36,710 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:20:36,710 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:20:36,710 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:20:36,710 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:20:36,711 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:20:36,711 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:20:36,719 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:20:36,719 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:20:36,720 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 18:20:36,720 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:20:36,720 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 18:20:36,720 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:20:36,721 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 18:20:36,721 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:20:36,721 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 18:20:36,721 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:20:36,722 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:20:36,722 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:20:36,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:20:36,723 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:20:36,723 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:20:36,723 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 18:20:36,725 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:20:36,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:20:36,725 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:20:36,726 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 18:20:36,726 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:20:36,726 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:20:36,726 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_75443ea9-28c5-44e1-b389-c29bc15173b6/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75443ea9-28c5-44e1-b389-c29bc15173b6/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f5ed9d077a05ec08544f0d3c902eb6b5aa6ad768c4ec69a1caaef2b54748a07e [2022-11-25 18:20:37,018 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:20:37,042 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:20:37,045 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:20:37,047 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:20:37,047 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:20:37,049 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75443ea9-28c5-44e1-b389-c29bc15173b6/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/pthread-ext/14_spin2003.i [2022-11-25 18:20:40,186 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:20:40,463 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:20:40,464 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75443ea9-28c5-44e1-b389-c29bc15173b6/sv-benchmarks/c/pthread-ext/14_spin2003.i [2022-11-25 18:20:40,474 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75443ea9-28c5-44e1-b389-c29bc15173b6/bin/uautomizer-ZsLfNo2U6R/data/95ab2bc8a/3a14146f6216443093a0f0f5e4c00ab6/FLAGbd7f779bf [2022-11-25 18:20:40,489 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75443ea9-28c5-44e1-b389-c29bc15173b6/bin/uautomizer-ZsLfNo2U6R/data/95ab2bc8a/3a14146f6216443093a0f0f5e4c00ab6 [2022-11-25 18:20:40,492 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:20:40,493 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:20:40,495 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:20:40,495 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:20:40,499 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:20:40,500 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:20:40" (1/1) ... [2022-11-25 18:20:40,501 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54ba7b39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:20:40, skipping insertion in model container [2022-11-25 18:20:40,501 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:20:40" (1/1) ... [2022-11-25 18:20:40,509 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:20:40,548 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:20:40,913 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_75443ea9-28c5-44e1-b389-c29bc15173b6/sv-benchmarks/c/pthread-ext/14_spin2003.i[30203,30216] [2022-11-25 18:20:40,929 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:20:40,941 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:20:40,986 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75443ea9-28c5-44e1-b389-c29bc15173b6/sv-benchmarks/c/pthread-ext/14_spin2003.i[30203,30216] [2022-11-25 18:20:40,995 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:20:41,043 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:20:41,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:20:41 WrapperNode [2022-11-25 18:20:41,044 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:20:41,045 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:20:41,046 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:20:41,046 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:20:41,054 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:20:41" (1/1) ... [2022-11-25 18:20:41,068 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:20:41" (1/1) ... [2022-11-25 18:20:41,089 INFO L138 Inliner]: procedures = 169, calls = 14, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 47 [2022-11-25 18:20:41,090 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:20:41,091 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:20:41,091 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:20:41,091 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:20:41,101 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:20:41" (1/1) ... [2022-11-25 18:20:41,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:20:41" (1/1) ... [2022-11-25 18:20:41,103 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:20:41" (1/1) ... [2022-11-25 18:20:41,103 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:20:41" (1/1) ... [2022-11-25 18:20:41,108 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:20:41" (1/1) ... [2022-11-25 18:20:41,112 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:20:41" (1/1) ... [2022-11-25 18:20:41,114 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:20:41" (1/1) ... [2022-11-25 18:20:41,115 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:20:41" (1/1) ... [2022-11-25 18:20:41,117 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:20:41,118 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:20:41,118 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:20:41,119 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:20:41,120 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:20:41" (1/1) ... [2022-11-25 18:20:41,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:20:41,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75443ea9-28c5-44e1-b389-c29bc15173b6/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:20:41,155 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75443ea9-28c5-44e1-b389-c29bc15173b6/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:20:41,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75443ea9-28c5-44e1-b389-c29bc15173b6/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:20:41,209 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-25 18:20:41,210 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-25 18:20:41,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 18:20:41,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:20:41,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 18:20:41,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 18:20:41,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 18:20:41,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:20:41,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:20:41,214 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 18:20:41,344 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:20:41,346 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:20:41,496 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:20:41,551 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:20:41,552 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 18:20:41,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:20:41 BoogieIcfgContainer [2022-11-25 18:20:41,554 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:20:41,557 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:20:41,557 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:20:41,560 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:20:41,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:20:40" (1/3) ... [2022-11-25 18:20:41,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5090f09e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:20:41, skipping insertion in model container [2022-11-25 18:20:41,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:20:41" (2/3) ... [2022-11-25 18:20:41,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5090f09e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:20:41, skipping insertion in model container [2022-11-25 18:20:41,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:20:41" (3/3) ... [2022-11-25 18:20:41,564 INFO L112 eAbstractionObserver]: Analyzing ICFG 14_spin2003.i [2022-11-25 18:20:41,573 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 18:20:41,584 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:20:41,585 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 18:20:41,585 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 18:20:41,628 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 18:20:41,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 43 places, 42 transitions, 89 flow [2022-11-25 18:20:41,705 INFO L130 PetriNetUnfolder]: 3/53 cut-off events. [2022-11-25 18:20:41,705 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:20:41,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 53 events. 3/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 68 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 26. Up to 4 conditions per place. [2022-11-25 18:20:41,711 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 42 transitions, 89 flow [2022-11-25 18:20:41,715 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 42 transitions, 89 flow [2022-11-25 18:20:41,720 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:20:41,737 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 43 places, 42 transitions, 89 flow [2022-11-25 18:20:41,741 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 43 places, 42 transitions, 89 flow [2022-11-25 18:20:41,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 43 places, 42 transitions, 89 flow [2022-11-25 18:20:41,760 INFO L130 PetriNetUnfolder]: 3/53 cut-off events. [2022-11-25 18:20:41,760 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:20:41,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 53 events. 3/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 68 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 26. Up to 4 conditions per place. [2022-11-25 18:20:41,762 INFO L119 LiptonReduction]: Number of co-enabled transitions 336 [2022-11-25 18:20:43,516 INFO L134 LiptonReduction]: Checked pairs total: 270 [2022-11-25 18:20:43,516 INFO L136 LiptonReduction]: Total number of compositions: 41 [2022-11-25 18:20:43,534 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:20:43,560 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;@2022d440, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:20:43,560 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-25 18:20:43,563 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2022-11-25 18:20:43,563 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:20:43,564 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:20:43,564 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 18:20:43,565 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:20:43,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:20:43,571 INFO L85 PathProgramCache]: Analyzing trace with hash 7129082, now seen corresponding path program 1 times [2022-11-25 18:20:43,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:20:43,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70055004] [2022-11-25 18:20:43,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:20:43,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:20:43,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:20:43,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:20:43,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:20:43,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70055004] [2022-11-25 18:20:43,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70055004] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:20:43,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:20:43,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:20:43,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737408877] [2022-11-25 18:20:43,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:20:43,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 18:20:43,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:20:43,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 18:20:43,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 18:20:43,864 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 83 [2022-11-25 18:20:43,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 11 places, 8 transitions, 21 flow. Second operand has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:43,868 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:20:43,868 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 83 [2022-11-25 18:20:43,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:20:43,902 INFO L130 PetriNetUnfolder]: 2/12 cut-off events. [2022-11-25 18:20:43,902 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:20:43,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 12 events. 2/12 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 2 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 14. Up to 11 conditions per place. [2022-11-25 18:20:43,904 INFO L137 encePairwiseOnDemand]: 81/83 looper letters, 5 selfloop transitions, 0 changer transitions 0/6 dead transitions. [2022-11-25 18:20:43,904 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 10 places, 6 transitions, 27 flow [2022-11-25 18:20:43,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 18:20:43,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 18:20:43,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 77 transitions. [2022-11-25 18:20:43,919 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.463855421686747 [2022-11-25 18:20:43,920 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 77 transitions. [2022-11-25 18:20:43,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 77 transitions. [2022-11-25 18:20:43,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:20:43,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 77 transitions. [2022-11-25 18:20:43,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 38.5) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:43,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:43,942 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:43,944 INFO L175 Difference]: Start difference. First operand has 11 places, 8 transitions, 21 flow. Second operand 2 states and 77 transitions. [2022-11-25 18:20:43,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 10 places, 6 transitions, 27 flow [2022-11-25 18:20:43,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 10 places, 6 transitions, 27 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 18:20:43,954 INFO L231 Difference]: Finished difference. Result has 10 places, 6 transitions, 17 flow [2022-11-25 18:20:43,956 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=17, PETRI_PLACES=10, PETRI_TRANSITIONS=6} [2022-11-25 18:20:43,966 INFO L288 CegarLoopForPetriNet]: 11 programPoint places, -1 predicate places. [2022-11-25 18:20:43,967 INFO L495 AbstractCegarLoop]: Abstraction has has 10 places, 6 transitions, 17 flow [2022-11-25 18:20:43,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:43,967 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:20:43,967 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-11-25 18:20:43,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 18:20:43,968 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:20:43,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:20:43,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1738907648, now seen corresponding path program 1 times [2022-11-25 18:20:43,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:20:43,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100692560] [2022-11-25 18:20:43,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:20:43,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:20:44,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:20:44,017 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 18:20:44,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:20:44,077 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 18:20:44,077 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 18:20:44,081 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-11-25 18:20:44,088 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-11-25 18:20:44,090 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-11-25 18:20:44,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 18:20:44,097 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-25 18:20:44,100 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 18:20:44,105 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-25 18:20:44,126 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 18:20:44,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 122 flow [2022-11-25 18:20:44,145 INFO L130 PetriNetUnfolder]: 5/79 cut-off events. [2022-11-25 18:20:44,146 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:20:44,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 79 events. 5/79 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 125 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 54. Up to 6 conditions per place. [2022-11-25 18:20:44,147 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 55 transitions, 122 flow [2022-11-25 18:20:44,148 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 55 transitions, 122 flow [2022-11-25 18:20:44,149 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:20:44,149 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 122 flow [2022-11-25 18:20:44,149 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 57 places, 55 transitions, 122 flow [2022-11-25 18:20:44,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 122 flow [2022-11-25 18:20:44,165 INFO L130 PetriNetUnfolder]: 5/79 cut-off events. [2022-11-25 18:20:44,165 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:20:44,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 79 events. 5/79 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 125 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 54. Up to 6 conditions per place. [2022-11-25 18:20:44,168 INFO L119 LiptonReduction]: Number of co-enabled transitions 984 [2022-11-25 18:20:45,333 INFO L134 LiptonReduction]: Checked pairs total: 2798 [2022-11-25 18:20:45,334 INFO L136 LiptonReduction]: Total number of compositions: 42 [2022-11-25 18:20:45,336 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:20:45,337 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;@2022d440, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:20:45,337 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-25 18:20:45,341 INFO L130 PetriNetUnfolder]: 0/12 cut-off events. [2022-11-25 18:20:45,341 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 18:20:45,342 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:20:45,342 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:20:45,342 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 18:20:45,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:20:45,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1132133121, now seen corresponding path program 1 times [2022-11-25 18:20:45,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:20:45,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178849909] [2022-11-25 18:20:45,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:20:45,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:20:45,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:20:45,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:20:45,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:20:45,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178849909] [2022-11-25 18:20:45,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178849909] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:20:45,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:20:45,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:20:45,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450753676] [2022-11-25 18:20:45,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:20:45,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:20:45,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:20:45,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:20:45,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:20:45,432 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 97 [2022-11-25 18:20:45,432 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:45,433 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:20:45,433 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 97 [2022-11-25 18:20:45,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:20:45,544 INFO L130 PetriNetUnfolder]: 97/220 cut-off events. [2022-11-25 18:20:45,544 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-25 18:20:45,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 445 conditions, 220 events. 97/220 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1018 event pairs, 61 based on Foata normal form. 14/227 useless extension candidates. Maximal degree in co-relation 164. Up to 143 conditions per place. [2022-11-25 18:20:45,549 INFO L137 encePairwiseOnDemand]: 88/97 looper letters, 21 selfloop transitions, 5 changer transitions 0/30 dead transitions. [2022-11-25 18:20:45,550 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 30 transitions, 129 flow [2022-11-25 18:20:45,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:20:45,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:20:45,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 140 transitions. [2022-11-25 18:20:45,556 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48109965635738833 [2022-11-25 18:20:45,557 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 140 transitions. [2022-11-25 18:20:45,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 140 transitions. [2022-11-25 18:20:45,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:20:45,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 140 transitions. [2022-11-25 18:20:45,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:45,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:45,562 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:45,563 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 54 flow. Second operand 3 states and 140 transitions. [2022-11-25 18:20:45,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 30 transitions, 129 flow [2022-11-25 18:20:45,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 30 transitions, 127 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-25 18:20:45,565 INFO L231 Difference]: Finished difference. Result has 28 places, 23 transitions, 88 flow [2022-11-25 18:20:45,565 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=28, PETRI_TRANSITIONS=23} [2022-11-25 18:20:45,566 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2022-11-25 18:20:45,566 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 23 transitions, 88 flow [2022-11-25 18:20:45,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:45,567 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:20:45,567 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-25 18:20:45,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 18:20:45,567 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 18:20:45,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:20:45,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1779920908, now seen corresponding path program 1 times [2022-11-25 18:20:45,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:20:45,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351375554] [2022-11-25 18:20:45,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:20:45,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:20:45,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:20:45,586 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 18:20:45,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:20:45,601 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 18:20:45,601 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 18:20:45,602 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-25 18:20:45,602 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-25 18:20:45,602 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-11-25 18:20:45,602 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-25 18:20:45,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 18:20:45,603 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-25 18:20:45,604 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 18:20:45,604 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-25 18:20:45,618 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 18:20:45,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 68 transitions, 157 flow [2022-11-25 18:20:45,632 INFO L130 PetriNetUnfolder]: 7/105 cut-off events. [2022-11-25 18:20:45,633 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 18:20:45,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 105 events. 7/105 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 197 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 83. Up to 8 conditions per place. [2022-11-25 18:20:45,634 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 68 transitions, 157 flow [2022-11-25 18:20:45,635 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 68 transitions, 157 flow [2022-11-25 18:20:45,635 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:20:45,635 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 71 places, 68 transitions, 157 flow [2022-11-25 18:20:45,636 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 71 places, 68 transitions, 157 flow [2022-11-25 18:20:45,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 68 transitions, 157 flow [2022-11-25 18:20:45,647 INFO L130 PetriNetUnfolder]: 7/105 cut-off events. [2022-11-25 18:20:45,647 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 18:20:45,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 105 events. 7/105 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 197 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 83. Up to 8 conditions per place. [2022-11-25 18:20:45,650 INFO L119 LiptonReduction]: Number of co-enabled transitions 1944 [2022-11-25 18:20:46,943 INFO L134 LiptonReduction]: Checked pairs total: 6798 [2022-11-25 18:20:46,944 INFO L136 LiptonReduction]: Total number of compositions: 57 [2022-11-25 18:20:46,946 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:20:46,947 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;@2022d440, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:20:46,947 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-25 18:20:46,949 INFO L130 PetriNetUnfolder]: 1/15 cut-off events. [2022-11-25 18:20:46,950 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 18:20:46,950 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:20:46,950 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:20:46,950 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-25 18:20:46,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:20:46,951 INFO L85 PathProgramCache]: Analyzing trace with hash -202093567, now seen corresponding path program 1 times [2022-11-25 18:20:46,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:20:46,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613965556] [2022-11-25 18:20:46,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:20:46,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:20:46,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:20:47,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:20:47,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:20:47,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613965556] [2022-11-25 18:20:47,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613965556] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:20:47,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:20:47,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:20:47,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934787985] [2022-11-25 18:20:47,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:20:47,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:20:47,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:20:47,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:20:47,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:20:47,055 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 125 [2022-11-25 18:20:47,056 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 81 flow. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:47,056 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:20:47,056 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 125 [2022-11-25 18:20:47,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:20:47,287 INFO L130 PetriNetUnfolder]: 966/1762 cut-off events. [2022-11-25 18:20:47,287 INFO L131 PetriNetUnfolder]: For 283/283 co-relation queries the response was YES. [2022-11-25 18:20:47,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3546 conditions, 1762 events. 966/1762 cut-off events. For 283/283 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 11527 event pairs, 535 based on Foata normal form. 242/1965 useless extension candidates. Maximal degree in co-relation 564. Up to 993 conditions per place. [2022-11-25 18:20:47,301 INFO L137 encePairwiseOnDemand]: 111/125 looper letters, 28 selfloop transitions, 7 changer transitions 0/41 dead transitions. [2022-11-25 18:20:47,301 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 41 transitions, 185 flow [2022-11-25 18:20:47,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:20:47,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:20:47,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 169 transitions. [2022-11-25 18:20:47,309 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45066666666666666 [2022-11-25 18:20:47,310 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 169 transitions. [2022-11-25 18:20:47,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 169 transitions. [2022-11-25 18:20:47,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:20:47,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 169 transitions. [2022-11-25 18:20:47,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:47,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:47,315 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:47,315 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 81 flow. Second operand 3 states and 169 transitions. [2022-11-25 18:20:47,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 41 transitions, 185 flow [2022-11-25 18:20:47,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 41 transitions, 177 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-11-25 18:20:47,320 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 125 flow [2022-11-25 18:20:47,321 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2022-11-25 18:20:47,323 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2022-11-25 18:20:47,323 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 125 flow [2022-11-25 18:20:47,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:47,324 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:20:47,325 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:20:47,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 18:20:47,325 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-25 18:20:47,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:20:47,326 INFO L85 PathProgramCache]: Analyzing trace with hash -2122471959, now seen corresponding path program 1 times [2022-11-25 18:20:47,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:20:47,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236820962] [2022-11-25 18:20:47,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:20:47,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:20:47,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:20:47,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:20:47,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:20:47,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236820962] [2022-11-25 18:20:47,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236820962] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:20:47,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:20:47,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:20:47,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031094887] [2022-11-25 18:20:47,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:20:47,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:20:47,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:20:47,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:20:47,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:20:47,482 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 125 [2022-11-25 18:20:47,482 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 125 flow. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:47,482 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:20:47,483 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 125 [2022-11-25 18:20:47,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:20:47,540 INFO L130 PetriNetUnfolder]: 49/233 cut-off events. [2022-11-25 18:20:47,540 INFO L131 PetriNetUnfolder]: For 61/61 co-relation queries the response was YES. [2022-11-25 18:20:47,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530 conditions, 233 events. 49/233 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1152 event pairs, 27 based on Foata normal form. 28/256 useless extension candidates. Maximal degree in co-relation 311. Up to 58 conditions per place. [2022-11-25 18:20:47,542 INFO L137 encePairwiseOnDemand]: 119/125 looper letters, 8 selfloop transitions, 6 changer transitions 0/26 dead transitions. [2022-11-25 18:20:47,543 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 26 transitions, 133 flow [2022-11-25 18:20:47,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:20:47,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:20:47,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 167 transitions. [2022-11-25 18:20:47,544 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44533333333333336 [2022-11-25 18:20:47,544 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 167 transitions. [2022-11-25 18:20:47,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 167 transitions. [2022-11-25 18:20:47,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:20:47,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 167 transitions. [2022-11-25 18:20:47,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:47,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:47,548 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:47,548 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 125 flow. Second operand 3 states and 167 transitions. [2022-11-25 18:20:47,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 26 transitions, 133 flow [2022-11-25 18:20:47,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 26 transitions, 105 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 18:20:47,551 INFO L231 Difference]: Finished difference. Result has 32 places, 23 transitions, 73 flow [2022-11-25 18:20:47,551 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=32, PETRI_TRANSITIONS=23} [2022-11-25 18:20:47,552 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, -2 predicate places. [2022-11-25 18:20:47,552 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions, 73 flow [2022-11-25 18:20:47,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:47,553 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:20:47,553 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-11-25 18:20:47,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 18:20:47,554 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-25 18:20:47,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:20:47,554 INFO L85 PathProgramCache]: Analyzing trace with hash 373173194, now seen corresponding path program 1 times [2022-11-25 18:20:47,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:20:47,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245179089] [2022-11-25 18:20:47,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:20:47,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:20:47,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:20:47,568 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 18:20:47,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:20:47,582 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 18:20:47,582 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 18:20:47,582 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-25 18:20:47,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-25 18:20:47,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-25 18:20:47,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-25 18:20:47,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-25 18:20:47,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 18:20:47,584 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-25 18:20:47,585 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 18:20:47,585 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-25 18:20:47,602 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 18:20:47,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 81 transitions, 194 flow [2022-11-25 18:20:47,618 INFO L130 PetriNetUnfolder]: 9/131 cut-off events. [2022-11-25 18:20:47,618 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-25 18:20:47,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 131 events. 9/131 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 243 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 113. Up to 10 conditions per place. [2022-11-25 18:20:47,619 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 81 transitions, 194 flow [2022-11-25 18:20:47,620 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 85 places, 81 transitions, 194 flow [2022-11-25 18:20:47,620 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:20:47,621 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 85 places, 81 transitions, 194 flow [2022-11-25 18:20:47,621 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 85 places, 81 transitions, 194 flow [2022-11-25 18:20:47,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 81 transitions, 194 flow [2022-11-25 18:20:47,635 INFO L130 PetriNetUnfolder]: 9/131 cut-off events. [2022-11-25 18:20:47,635 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-25 18:20:47,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 131 events. 9/131 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 243 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 113. Up to 10 conditions per place. [2022-11-25 18:20:47,639 INFO L119 LiptonReduction]: Number of co-enabled transitions 3216 [2022-11-25 18:20:49,262 INFO L134 LiptonReduction]: Checked pairs total: 14518 [2022-11-25 18:20:49,262 INFO L136 LiptonReduction]: Total number of compositions: 68 [2022-11-25 18:20:49,271 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:20:49,274 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;@2022d440, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:20:49,274 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-25 18:20:49,277 INFO L130 PetriNetUnfolder]: 1/15 cut-off events. [2022-11-25 18:20:49,277 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 18:20:49,277 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:20:49,278 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:20:49,278 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-25 18:20:49,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:20:49,279 INFO L85 PathProgramCache]: Analyzing trace with hash 292536550, now seen corresponding path program 1 times [2022-11-25 18:20:49,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:20:49,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327329076] [2022-11-25 18:20:49,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:20:49,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:20:49,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:20:49,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:20:49,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:20:49,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327329076] [2022-11-25 18:20:49,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327329076] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:20:49,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:20:49,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:20:49,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007330356] [2022-11-25 18:20:49,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:20:49,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:20:49,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:20:49,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:20:49,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:20:49,376 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 149 [2022-11-25 18:20:49,376 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:49,376 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:20:49,376 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 149 [2022-11-25 18:20:49,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:20:51,123 INFO L130 PetriNetUnfolder]: 9634/15076 cut-off events. [2022-11-25 18:20:51,123 INFO L131 PetriNetUnfolder]: For 3585/3585 co-relation queries the response was YES. [2022-11-25 18:20:51,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30806 conditions, 15076 events. 9634/15076 cut-off events. For 3585/3585 co-relation queries the response was YES. Maximal size of possible extension queue 988. Compared 113361 event pairs, 5177 based on Foata normal form. 1970/16770 useless extension candidates. Maximal degree in co-relation 3606. Up to 8161 conditions per place. [2022-11-25 18:20:51,308 INFO L137 encePairwiseOnDemand]: 131/149 looper letters, 37 selfloop transitions, 9 changer transitions 0/53 dead transitions. [2022-11-25 18:20:51,308 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 53 transitions, 251 flow [2022-11-25 18:20:51,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:20:51,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:20:51,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 198 transitions. [2022-11-25 18:20:51,310 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4429530201342282 [2022-11-25 18:20:51,310 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 198 transitions. [2022-11-25 18:20:51,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 198 transitions. [2022-11-25 18:20:51,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:20:51,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 198 transitions. [2022-11-25 18:20:51,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:51,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 149.0) internal successors, (596), 4 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:51,313 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 149.0) internal successors, (596), 4 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:51,314 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 108 flow. Second operand 3 states and 198 transitions. [2022-11-25 18:20:51,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 53 transitions, 251 flow [2022-11-25 18:20:51,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 53 transitions, 233 flow, removed 9 selfloop flow, removed 0 redundant places. [2022-11-25 18:20:51,319 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 162 flow [2022-11-25 18:20:51,320 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2022-11-25 18:20:51,320 INFO L288 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2022-11-25 18:20:51,321 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 162 flow [2022-11-25 18:20:51,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:51,321 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:20:51,321 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:20:51,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 18:20:51,322 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-25 18:20:51,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:20:51,323 INFO L85 PathProgramCache]: Analyzing trace with hash -710997689, now seen corresponding path program 1 times [2022-11-25 18:20:51,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:20:51,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069066193] [2022-11-25 18:20:51,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:20:51,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:20:51,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:20:51,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:20:51,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:20:51,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069066193] [2022-11-25 18:20:51,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069066193] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:20:51,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:20:51,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:20:51,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924908297] [2022-11-25 18:20:51,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:20:51,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:20:51,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:20:51,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:20:51,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:20:51,382 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 149 [2022-11-25 18:20:51,383 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:51,383 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:20:51,383 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 149 [2022-11-25 18:20:51,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:20:51,490 INFO L130 PetriNetUnfolder]: 149/641 cut-off events. [2022-11-25 18:20:51,490 INFO L131 PetriNetUnfolder]: For 177/177 co-relation queries the response was YES. [2022-11-25 18:20:51,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1455 conditions, 641 events. 149/641 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4255 event pairs, 83 based on Foata normal form. 124/748 useless extension candidates. Maximal degree in co-relation 879. Up to 164 conditions per place. [2022-11-25 18:20:51,494 INFO L137 encePairwiseOnDemand]: 141/149 looper letters, 10 selfloop transitions, 8 changer transitions 0/33 dead transitions. [2022-11-25 18:20:51,494 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 33 transitions, 173 flow [2022-11-25 18:20:51,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:20:51,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:20:51,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 196 transitions. [2022-11-25 18:20:51,496 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43847874720357943 [2022-11-25 18:20:51,496 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 196 transitions. [2022-11-25 18:20:51,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 196 transitions. [2022-11-25 18:20:51,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:20:51,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 196 transitions. [2022-11-25 18:20:51,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:51,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 149.0) internal successors, (596), 4 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:51,499 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 149.0) internal successors, (596), 4 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:51,499 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 162 flow. Second operand 3 states and 196 transitions. [2022-11-25 18:20:51,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 33 transitions, 173 flow [2022-11-25 18:20:51,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 33 transitions, 137 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 18:20:51,505 INFO L231 Difference]: Finished difference. Result has 40 places, 29 transitions, 94 flow [2022-11-25 18:20:51,505 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=40, PETRI_TRANSITIONS=29} [2022-11-25 18:20:51,507 INFO L288 CegarLoopForPetriNet]: 43 programPoint places, -3 predicate places. [2022-11-25 18:20:51,508 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 29 transitions, 94 flow [2022-11-25 18:20:51,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:51,508 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:20:51,508 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-25 18:20:51,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 18:20:51,509 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-25 18:20:51,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:20:51,510 INFO L85 PathProgramCache]: Analyzing trace with hash 464528527, now seen corresponding path program 1 times [2022-11-25 18:20:51,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:20:51,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681269729] [2022-11-25 18:20:51,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:20:51,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:20:51,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:20:51,544 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 18:20:51,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:20:51,573 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 18:20:51,576 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 18:20:51,576 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-11-25 18:20:51,576 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-11-25 18:20:51,576 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-11-25 18:20:51,577 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-25 18:20:51,577 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-25 18:20:51,577 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-25 18:20:51,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 18:20:51,577 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-25 18:20:51,579 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 18:20:51,579 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-25 18:20:51,606 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 18:20:51,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 94 transitions, 233 flow [2022-11-25 18:20:51,627 INFO L130 PetriNetUnfolder]: 11/157 cut-off events. [2022-11-25 18:20:51,628 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-25 18:20:51,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 157 events. 11/157 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 305 event pairs, 0 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 144. Up to 12 conditions per place. [2022-11-25 18:20:51,629 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 94 transitions, 233 flow [2022-11-25 18:20:51,630 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 94 transitions, 233 flow [2022-11-25 18:20:51,631 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:20:51,631 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 94 transitions, 233 flow [2022-11-25 18:20:51,632 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 94 transitions, 233 flow [2022-11-25 18:20:51,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 94 transitions, 233 flow [2022-11-25 18:20:51,649 INFO L130 PetriNetUnfolder]: 11/157 cut-off events. [2022-11-25 18:20:51,650 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-25 18:20:51,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 157 events. 11/157 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 305 event pairs, 0 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 144. Up to 12 conditions per place. [2022-11-25 18:20:51,655 INFO L119 LiptonReduction]: Number of co-enabled transitions 4800 [2022-11-25 18:20:53,553 INFO L134 LiptonReduction]: Checked pairs total: 18293 [2022-11-25 18:20:53,553 INFO L136 LiptonReduction]: Total number of compositions: 79 [2022-11-25 18:20:53,555 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:20:53,556 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;@2022d440, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:20:53,556 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-25 18:20:53,559 INFO L130 PetriNetUnfolder]: 1/15 cut-off events. [2022-11-25 18:20:53,559 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 18:20:53,559 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:20:53,560 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:20:53,560 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-25 18:20:53,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:20:53,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1969149212, now seen corresponding path program 1 times [2022-11-25 18:20:53,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:20:53,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783832708] [2022-11-25 18:20:53,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:20:53,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:20:53,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:20:53,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:20:53,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:20:53,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783832708] [2022-11-25 18:20:53,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783832708] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:20:53,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:20:53,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:20:53,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122434205] [2022-11-25 18:20:53,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:20:53,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:20:53,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:20:53,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:20:53,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:20:53,622 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 173 [2022-11-25 18:20:53,623 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:53,623 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:20:53,624 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 173 [2022-11-25 18:20:53,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:21:06,043 INFO L130 PetriNetUnfolder]: 84206/120198 cut-off events. [2022-11-25 18:21:06,043 INFO L131 PetriNetUnfolder]: For 38290/38290 co-relation queries the response was YES. [2022-11-25 18:21:06,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248373 conditions, 120198 events. 84206/120198 cut-off events. For 38290/38290 co-relation queries the response was YES. Maximal size of possible extension queue 6117. Compared 970266 event pairs, 44681 based on Foata normal form. 14930/133185 useless extension candidates. Maximal degree in co-relation 31252. Up to 62881 conditions per place. [2022-11-25 18:21:07,028 INFO L137 encePairwiseOnDemand]: 151/173 looper letters, 46 selfloop transitions, 11 changer transitions 0/65 dead transitions. [2022-11-25 18:21:07,028 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 65 transitions, 321 flow [2022-11-25 18:21:07,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:21:07,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:21:07,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 227 transitions. [2022-11-25 18:21:07,030 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4373795761078998 [2022-11-25 18:21:07,030 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 227 transitions. [2022-11-25 18:21:07,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 227 transitions. [2022-11-25 18:21:07,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:21:07,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 227 transitions. [2022-11-25 18:21:07,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:21:07,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:21:07,035 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:21:07,035 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 137 flow. Second operand 3 states and 227 transitions. [2022-11-25 18:21:07,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 65 transitions, 321 flow [2022-11-25 18:21:07,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 65 transitions, 289 flow, removed 16 selfloop flow, removed 0 redundant places. [2022-11-25 18:21:07,155 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 199 flow [2022-11-25 18:21:07,155 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=199, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2022-11-25 18:21:07,155 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 3 predicate places. [2022-11-25 18:21:07,156 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 199 flow [2022-11-25 18:21:07,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:21:07,156 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:21:07,156 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:21:07,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 18:21:07,157 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-25 18:21:07,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:21:07,157 INFO L85 PathProgramCache]: Analyzing trace with hash 389990779, now seen corresponding path program 1 times [2022-11-25 18:21:07,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:21:07,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399459391] [2022-11-25 18:21:07,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:21:07,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:21:07,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:21:07,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:21:07,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:21:07,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399459391] [2022-11-25 18:21:07,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399459391] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:21:07,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:21:07,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:21:07,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789808542] [2022-11-25 18:21:07,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:21:07,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:21:07,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:21:07,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:21:07,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:21:07,241 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 173 [2022-11-25 18:21:07,242 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 199 flow. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:21:07,242 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:21:07,242 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 173 [2022-11-25 18:21:07,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:21:07,436 INFO L130 PetriNetUnfolder]: 405/1641 cut-off events. [2022-11-25 18:21:07,437 INFO L131 PetriNetUnfolder]: For 465/465 co-relation queries the response was YES. [2022-11-25 18:21:07,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3728 conditions, 1641 events. 405/1641 cut-off events. For 465/465 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 13458 event pairs, 227 based on Foata normal form. 444/2036 useless extension candidates. Maximal degree in co-relation 2227. Up to 436 conditions per place. [2022-11-25 18:21:07,447 INFO L137 encePairwiseOnDemand]: 163/173 looper letters, 12 selfloop transitions, 10 changer transitions 0/40 dead transitions. [2022-11-25 18:21:07,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 40 transitions, 213 flow [2022-11-25 18:21:07,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:21:07,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:21:07,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 225 transitions. [2022-11-25 18:21:07,449 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43352601156069365 [2022-11-25 18:21:07,449 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 225 transitions. [2022-11-25 18:21:07,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 225 transitions. [2022-11-25 18:21:07,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:21:07,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 225 transitions. [2022-11-25 18:21:07,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:21:07,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:21:07,454 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:21:07,454 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 199 flow. Second operand 3 states and 225 transitions. [2022-11-25 18:21:07,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 40 transitions, 213 flow [2022-11-25 18:21:07,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 40 transitions, 169 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 18:21:07,464 INFO L231 Difference]: Finished difference. Result has 48 places, 35 transitions, 115 flow [2022-11-25 18:21:07,464 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=48, PETRI_TRANSITIONS=35} [2022-11-25 18:21:07,466 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, -4 predicate places. [2022-11-25 18:21:07,466 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 35 transitions, 115 flow [2022-11-25 18:21:07,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:21:07,466 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:21:07,466 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:21:07,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 18:21:07,467 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-25 18:21:07,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:21:07,467 INFO L85 PathProgramCache]: Analyzing trace with hash 263457744, now seen corresponding path program 1 times [2022-11-25 18:21:07,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:21:07,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746366338] [2022-11-25 18:21:07,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:21:07,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:21:07,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:21:07,492 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 18:21:07,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:21:07,506 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 18:21:07,506 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 18:21:07,506 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-11-25 18:21:07,506 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-11-25 18:21:07,507 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2022-11-25 18:21:07,507 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-11-25 18:21:07,507 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2022-11-25 18:21:07,507 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-11-25 18:21:07,507 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-11-25 18:21:07,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 18:21:07,508 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-25 18:21:07,508 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 18:21:07,509 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-11-25 18:21:07,536 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 18:21:07,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 107 transitions, 274 flow [2022-11-25 18:21:07,559 INFO L130 PetriNetUnfolder]: 13/183 cut-off events. [2022-11-25 18:21:07,559 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-25 18:21:07,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 183 events. 13/183 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 369 event pairs, 0 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 176. Up to 14 conditions per place. [2022-11-25 18:21:07,561 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 107 transitions, 274 flow [2022-11-25 18:21:07,562 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 113 places, 107 transitions, 274 flow [2022-11-25 18:21:07,563 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:21:07,563 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 113 places, 107 transitions, 274 flow [2022-11-25 18:21:07,563 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 113 places, 107 transitions, 274 flow [2022-11-25 18:21:07,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 107 transitions, 274 flow [2022-11-25 18:21:07,702 INFO L130 PetriNetUnfolder]: 13/183 cut-off events. [2022-11-25 18:21:07,703 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-25 18:21:07,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 183 events. 13/183 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 369 event pairs, 0 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 176. Up to 14 conditions per place. [2022-11-25 18:21:07,709 INFO L119 LiptonReduction]: Number of co-enabled transitions 6696 [2022-11-25 18:21:09,948 INFO L134 LiptonReduction]: Checked pairs total: 32279 [2022-11-25 18:21:09,948 INFO L136 LiptonReduction]: Total number of compositions: 86 [2022-11-25 18:21:09,950 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:21:09,950 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;@2022d440, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:21:09,951 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-11-25 18:21:09,953 INFO L130 PetriNetUnfolder]: 1/15 cut-off events. [2022-11-25 18:21:09,953 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 18:21:09,954 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:21:09,954 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:21:09,954 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-11-25 18:21:09,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:21:09,955 INFO L85 PathProgramCache]: Analyzing trace with hash 455805272, now seen corresponding path program 1 times [2022-11-25 18:21:09,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:21:09,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656738471] [2022-11-25 18:21:09,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:21:09,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:21:09,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:21:09,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:21:09,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:21:09,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656738471] [2022-11-25 18:21:09,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656738471] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:21:09,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:21:09,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:21:09,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220003271] [2022-11-25 18:21:09,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:21:09,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:21:09,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:21:09,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:21:09,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:21:10,021 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 193 [2022-11-25 18:21:10,022 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 53 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:21:10,022 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:21:10,022 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 193 [2022-11-25 18:21:10,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand