./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/stack_longest-1.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_07b40117-b049-4e82-bb2a-a73494637ea2/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b40117-b049-4e82-bb2a-a73494637ea2/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_07b40117-b049-4e82-bb2a-a73494637ea2/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b40117-b049-4e82-bb2a-a73494637ea2/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/stack_longest-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b40117-b049-4e82-bb2a-a73494637ea2/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_07b40117-b049-4e82-bb2a-a73494637ea2/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 529fe0895c01c52d9b18b51c32204a307faf547c0c07b22bc1a431308affcf90 --- 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 15:33:32,160 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 15:33:32,162 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 15:33:32,182 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 15:33:32,183 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 15:33:32,184 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 15:33:32,185 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 15:33:32,187 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 15:33:32,189 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 15:33:32,190 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 15:33:32,191 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 15:33:32,192 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 15:33:32,193 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 15:33:32,194 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 15:33:32,195 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 15:33:32,197 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 15:33:32,198 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 15:33:32,199 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 15:33:32,200 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 15:33:32,202 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 15:33:32,204 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 15:33:32,206 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 15:33:32,207 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 15:33:32,208 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 15:33:32,211 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 15:33:32,211 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 15:33:32,212 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 15:33:32,213 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 15:33:32,213 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 15:33:32,214 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 15:33:32,214 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 15:33:32,215 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 15:33:32,216 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 15:33:32,217 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 15:33:32,218 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 15:33:32,218 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 15:33:32,219 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 15:33:32,219 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 15:33:32,219 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 15:33:32,220 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 15:33:32,227 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 15:33:32,228 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b40117-b049-4e82-bb2a-a73494637ea2/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 15:33:32,268 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 15:33:32,268 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 15:33:32,274 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 15:33:32,274 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 15:33:32,275 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 15:33:32,275 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 15:33:32,277 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 15:33:32,277 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 15:33:32,278 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 15:33:32,278 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 15:33:32,279 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 15:33:32,279 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 15:33:32,280 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 15:33:32,280 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 15:33:32,280 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 15:33:32,280 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 15:33:32,280 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 15:33:32,281 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 15:33:32,281 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 15:33:32,281 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 15:33:32,281 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 15:33:32,281 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 15:33:32,282 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 15:33:32,282 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 15:33:32,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:33:32,283 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 15:33:32,283 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 15:33:32,283 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 15:33:32,284 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 15:33:32,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 15:33:32,284 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 15:33:32,284 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 15:33:32,285 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 15:33:32,285 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 15:33:32,285 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_07b40117-b049-4e82-bb2a-a73494637ea2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b40117-b049-4e82-bb2a-a73494637ea2/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 529fe0895c01c52d9b18b51c32204a307faf547c0c07b22bc1a431308affcf90 [2022-11-25 15:33:32,535 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 15:33:32,557 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 15:33:32,560 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 15:33:32,561 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 15:33:32,562 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 15:33:32,563 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b40117-b049-4e82-bb2a-a73494637ea2/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/pthread/stack_longest-1.i [2022-11-25 15:33:35,681 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 15:33:36,001 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 15:33:36,006 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b40117-b049-4e82-bb2a-a73494637ea2/sv-benchmarks/c/pthread/stack_longest-1.i [2022-11-25 15:33:36,023 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b40117-b049-4e82-bb2a-a73494637ea2/bin/uautomizer-ZsLfNo2U6R/data/a3ea687f3/6a5ace9f2d8e42399501bc9b0a20f8e6/FLAG74c393df3 [2022-11-25 15:33:36,042 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b40117-b049-4e82-bb2a-a73494637ea2/bin/uautomizer-ZsLfNo2U6R/data/a3ea687f3/6a5ace9f2d8e42399501bc9b0a20f8e6 [2022-11-25 15:33:36,044 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 15:33:36,046 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 15:33:36,047 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 15:33:36,047 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 15:33:36,053 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 15:33:36,055 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:33:36" (1/1) ... [2022-11-25 15:33:36,056 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10d2198a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:36, skipping insertion in model container [2022-11-25 15:33:36,056 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:33:36" (1/1) ... [2022-11-25 15:33:36,065 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 15:33:36,110 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 15:33:36,664 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_07b40117-b049-4e82-bb2a-a73494637ea2/sv-benchmarks/c/pthread/stack_longest-1.i[41530,41543] [2022-11-25 15:33:36,711 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:33:36,725 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 15:33:36,786 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_07b40117-b049-4e82-bb2a-a73494637ea2/sv-benchmarks/c/pthread/stack_longest-1.i[41530,41543] [2022-11-25 15:33:36,806 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:33:36,890 INFO L208 MainTranslator]: Completed translation [2022-11-25 15:33:36,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:36 WrapperNode [2022-11-25 15:33:36,891 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 15:33:36,893 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 15:33:36,893 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 15:33:36,893 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 15:33:36,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:36" (1/1) ... [2022-11-25 15:33:36,929 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:36" (1/1) ... [2022-11-25 15:33:37,013 INFO L138 Inliner]: procedures = 277, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 155 [2022-11-25 15:33:37,014 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 15:33:37,015 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 15:33:37,015 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 15:33:37,015 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 15:33:37,037 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:36" (1/1) ... [2022-11-25 15:33:37,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:36" (1/1) ... [2022-11-25 15:33:37,040 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:36" (1/1) ... [2022-11-25 15:33:37,040 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:36" (1/1) ... [2022-11-25 15:33:37,047 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:36" (1/1) ... [2022-11-25 15:33:37,078 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:36" (1/1) ... [2022-11-25 15:33:37,094 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:36" (1/1) ... [2022-11-25 15:33:37,095 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:36" (1/1) ... [2022-11-25 15:33:37,098 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 15:33:37,099 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 15:33:37,099 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 15:33:37,099 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 15:33:37,100 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:36" (1/1) ... [2022-11-25 15:33:37,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:33:37,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b40117-b049-4e82-bb2a-a73494637ea2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:33:37,141 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b40117-b049-4e82-bb2a-a73494637ea2/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 15:33:37,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b40117-b049-4e82-bb2a-a73494637ea2/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 15:33:37,188 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-25 15:33:37,189 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-25 15:33:37,190 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-25 15:33:37,190 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-25 15:33:37,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 15:33:37,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 15:33:37,191 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 15:33:37,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 15:33:37,191 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-25 15:33:37,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 15:33:37,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 15:33:37,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 15:33:37,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 15:33:37,194 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 15:33:37,342 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 15:33:37,344 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 15:33:37,663 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 15:33:37,675 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 15:33:37,675 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 15:33:37,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:33:37 BoogieIcfgContainer [2022-11-25 15:33:37,682 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 15:33:37,684 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 15:33:37,685 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 15:33:37,688 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 15:33:37,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 03:33:36" (1/3) ... [2022-11-25 15:33:37,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cf7545a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:33:37, skipping insertion in model container [2022-11-25 15:33:37,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:36" (2/3) ... [2022-11-25 15:33:37,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cf7545a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:33:37, skipping insertion in model container [2022-11-25 15:33:37,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:33:37" (3/3) ... [2022-11-25 15:33:37,704 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-1.i [2022-11-25 15:33:37,717 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 15:33:37,735 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 15:33:37,735 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-25 15:33:37,735 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 15:33:37,888 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 15:33:37,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 179 transitions, 374 flow [2022-11-25 15:33:38,009 INFO L130 PetriNetUnfolder]: 10/177 cut-off events. [2022-11-25 15:33:38,010 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 15:33:38,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 177 events. 10/177 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 438 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 135. Up to 3 conditions per place. [2022-11-25 15:33:38,026 INFO L82 GeneralOperation]: Start removeDead. Operand has 176 places, 179 transitions, 374 flow [2022-11-25 15:33:38,033 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 167 transitions, 343 flow [2022-11-25 15:33:38,039 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 15:33:38,062 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 164 places, 167 transitions, 343 flow [2022-11-25 15:33:38,070 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 164 places, 167 transitions, 343 flow [2022-11-25 15:33:38,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 167 transitions, 343 flow [2022-11-25 15:33:38,159 INFO L130 PetriNetUnfolder]: 10/167 cut-off events. [2022-11-25 15:33:38,159 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 15:33:38,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175 conditions, 167 events. 10/167 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 348 event pairs, 0 based on Foata normal form. 0/155 useless extension candidates. Maximal degree in co-relation 135. Up to 3 conditions per place. [2022-11-25 15:33:38,174 INFO L119 LiptonReduction]: Number of co-enabled transitions 9552 [2022-11-25 15:33:43,585 INFO L134 LiptonReduction]: Checked pairs total: 11047 [2022-11-25 15:33:43,585 INFO L136 LiptonReduction]: Total number of compositions: 159 [2022-11-25 15:33:43,600 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:33:43,607 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;@226e5d0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:33:43,607 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-25 15:33:43,612 INFO L130 PetriNetUnfolder]: 1/16 cut-off events. [2022-11-25 15:33:43,612 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 15:33:43,612 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:33:43,613 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 15:33:43,613 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 15:33:43,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:43,619 INFO L85 PathProgramCache]: Analyzing trace with hash -176206445, now seen corresponding path program 1 times [2022-11-25 15:33:43,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:43,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19708830] [2022-11-25 15:33:43,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:43,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:43,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:43,887 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 15:33:43,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:43,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19708830] [2022-11-25 15:33:43,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19708830] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:33:43,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:33:43,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:33:43,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717079286] [2022-11-25 15:33:43,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:33:43,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:33:43,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:43,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:33:43,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:33:43,965 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 338 [2022-11-25 15:33:43,971 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states 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 15:33:43,971 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:33:43,972 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 338 [2022-11-25 15:33:43,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:33:44,239 INFO L130 PetriNetUnfolder]: 773/1254 cut-off events. [2022-11-25 15:33:44,239 INFO L131 PetriNetUnfolder]: For 68/68 co-relation queries the response was YES. [2022-11-25 15:33:44,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2550 conditions, 1254 events. 773/1254 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5304 event pairs, 216 based on Foata normal form. 0/966 useless extension candidates. Maximal degree in co-relation 2344. Up to 714 conditions per place. [2022-11-25 15:33:44,248 INFO L137 encePairwiseOnDemand]: 333/338 looper letters, 53 selfloop transitions, 4 changer transitions 0/58 dead transitions. [2022-11-25 15:33:44,249 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 58 transitions, 245 flow [2022-11-25 15:33:44,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:33:44,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:33:44,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 550 transitions. [2022-11-25 15:33:44,277 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5424063116370809 [2022-11-25 15:33:44,278 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 550 transitions. [2022-11-25 15:33:44,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 550 transitions. [2022-11-25 15:33:44,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:33:44,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 550 transitions. [2022-11-25 15:33:44,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 states 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 15:33:44,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 338.0) internal successors, (1352), 4 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states 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 15:33:44,294 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 338.0) internal successors, (1352), 4 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states 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 15:33:44,296 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 73 flow. Second operand 3 states and 550 transitions. [2022-11-25 15:33:44,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 58 transitions, 245 flow [2022-11-25 15:33:44,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 58 transitions, 237 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 15:33:44,303 INFO L231 Difference]: Finished difference. Result has 35 places, 35 transitions, 98 flow [2022-11-25 15:33:44,305 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=35, PETRI_TRANSITIONS=35} [2022-11-25 15:33:44,308 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 1 predicate places. [2022-11-25 15:33:44,309 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 35 transitions, 98 flow [2022-11-25 15:33:44,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states 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 15:33:44,309 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:33:44,309 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:44,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 15:33:44,310 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 15:33:44,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:44,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1943199833, now seen corresponding path program 1 times [2022-11-25 15:33:44,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:44,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441457585] [2022-11-25 15:33:44,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:44,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:44,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:44,494 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 15:33:44,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:44,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441457585] [2022-11-25 15:33:44,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441457585] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:33:44,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:33:44,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:33:44,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658077373] [2022-11-25 15:33:44,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:33:44,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:33:44,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:44,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:33:44,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:33:44,506 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 338 [2022-11-25 15:33:44,507 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 35 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states 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 15:33:44,507 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:33:44,507 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 338 [2022-11-25 15:33:44,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:33:44,708 INFO L130 PetriNetUnfolder]: 837/1382 cut-off events. [2022-11-25 15:33:44,708 INFO L131 PetriNetUnfolder]: For 227/227 co-relation queries the response was YES. [2022-11-25 15:33:44,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3003 conditions, 1382 events. 837/1382 cut-off events. For 227/227 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5777 event pairs, 364 based on Foata normal form. 40/1158 useless extension candidates. Maximal degree in co-relation 2606. Up to 1084 conditions per place. [2022-11-25 15:33:44,717 INFO L137 encePairwiseOnDemand]: 334/338 looper letters, 47 selfloop transitions, 2 changer transitions 3/53 dead transitions. [2022-11-25 15:33:44,717 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 53 transitions, 245 flow [2022-11-25 15:33:44,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:33:44,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:33:44,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 546 transitions. [2022-11-25 15:33:44,723 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2022-11-25 15:33:44,723 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 546 transitions. [2022-11-25 15:33:44,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 546 transitions. [2022-11-25 15:33:44,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:33:44,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 546 transitions. [2022-11-25 15:33:44,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states 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 15:33:44,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 338.0) internal successors, (1352), 4 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states 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 15:33:44,732 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 338.0) internal successors, (1352), 4 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states 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 15:33:44,733 INFO L175 Difference]: Start difference. First operand has 35 places, 35 transitions, 98 flow. Second operand 3 states and 546 transitions. [2022-11-25 15:33:44,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 53 transitions, 245 flow [2022-11-25 15:33:44,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 53 transitions, 235 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 15:33:44,738 INFO L231 Difference]: Finished difference. Result has 36 places, 36 transitions, 106 flow [2022-11-25 15:33:44,738 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=36, PETRI_TRANSITIONS=36} [2022-11-25 15:33:44,739 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 2 predicate places. [2022-11-25 15:33:44,739 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 36 transitions, 106 flow [2022-11-25 15:33:44,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states 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 15:33:44,740 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:33:44,740 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:44,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 15:33:44,741 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 15:33:44,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:44,744 INFO L85 PathProgramCache]: Analyzing trace with hash 668943844, now seen corresponding path program 1 times [2022-11-25 15:33:44,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:44,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564681392] [2022-11-25 15:33:44,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:44,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:44,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:44,821 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 15:33:44,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:44,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564681392] [2022-11-25 15:33:44,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564681392] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:33:44,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:33:44,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:33:44,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397071345] [2022-11-25 15:33:44,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:33:44,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:33:44,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:44,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:33:44,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:33:44,835 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 338 [2022-11-25 15:33:44,835 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 36 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states 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 15:33:44,836 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:33:44,836 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 338 [2022-11-25 15:33:44,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:33:45,072 INFO L130 PetriNetUnfolder]: 887/1456 cut-off events. [2022-11-25 15:33:45,072 INFO L131 PetriNetUnfolder]: For 205/205 co-relation queries the response was YES. [2022-11-25 15:33:45,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3288 conditions, 1456 events. 887/1456 cut-off events. For 205/205 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 6219 event pairs, 607 based on Foata normal form. 52/1288 useless extension candidates. Maximal degree in co-relation 2884. Up to 1297 conditions per place. [2022-11-25 15:33:45,080 INFO L137 encePairwiseOnDemand]: 335/338 looper letters, 50 selfloop transitions, 4 changer transitions 0/55 dead transitions. [2022-11-25 15:33:45,081 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 55 transitions, 270 flow [2022-11-25 15:33:45,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:33:45,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:33:45,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 541 transitions. [2022-11-25 15:33:45,083 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5335305719921104 [2022-11-25 15:33:45,083 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 541 transitions. [2022-11-25 15:33:45,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 541 transitions. [2022-11-25 15:33:45,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:33:45,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 541 transitions. [2022-11-25 15:33:45,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 0 states 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 15:33:45,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 338.0) internal successors, (1352), 4 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states 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 15:33:45,088 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 338.0) internal successors, (1352), 4 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states 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 15:33:45,088 INFO L175 Difference]: Start difference. First operand has 36 places, 36 transitions, 106 flow. Second operand 3 states and 541 transitions. [2022-11-25 15:33:45,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 55 transitions, 270 flow [2022-11-25 15:33:45,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 55 transitions, 268 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:33:45,091 INFO L231 Difference]: Finished difference. Result has 38 places, 37 transitions, 124 flow [2022-11-25 15:33:45,091 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=38, PETRI_TRANSITIONS=37} [2022-11-25 15:33:45,092 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 4 predicate places. [2022-11-25 15:33:45,092 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 37 transitions, 124 flow [2022-11-25 15:33:45,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states 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 15:33:45,093 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:33:45,093 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:45,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 15:33:45,094 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 15:33:45,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:45,094 INFO L85 PathProgramCache]: Analyzing trace with hash -52180784, now seen corresponding path program 1 times [2022-11-25 15:33:45,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:45,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386036656] [2022-11-25 15:33:45,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:45,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:45,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:45,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:33:45,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:45,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386036656] [2022-11-25 15:33:45,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386036656] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:33:45,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139550425] [2022-11-25 15:33:45,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:45,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:45,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b40117-b049-4e82-bb2a-a73494637ea2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:33:45,209 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b40117-b049-4e82-bb2a-a73494637ea2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:33:45,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b40117-b049-4e82-bb2a-a73494637ea2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 15:33:45,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:45,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 15:33:45,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:33:45,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:33:45,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:33:45,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:33:45,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139550425] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:33:45,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:33:45,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-11-25 15:33:45,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507991956] [2022-11-25 15:33:45,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:33:45,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 15:33:45,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:45,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 15:33:45,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-25 15:33:45,494 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 338 [2022-11-25 15:33:45,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 37 transitions, 124 flow. Second operand has 10 states, 10 states have (on average 164.6) internal successors, (1646), 10 states have internal predecessors, (1646), 0 states have call successors, (0), 0 states 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 15:33:45,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:33:45,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 338 [2022-11-25 15:33:45,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:33:46,137 INFO L130 PetriNetUnfolder]: 1844/2985 cut-off events. [2022-11-25 15:33:46,137 INFO L131 PetriNetUnfolder]: For 1212/1212 co-relation queries the response was YES. [2022-11-25 15:33:46,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7213 conditions, 2985 events. 1844/2985 cut-off events. For 1212/1212 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 13749 event pairs, 356 based on Foata normal form. 48/2605 useless extension candidates. Maximal degree in co-relation 6594. Up to 844 conditions per place. [2022-11-25 15:33:46,158 INFO L137 encePairwiseOnDemand]: 332/338 looper letters, 164 selfloop transitions, 22 changer transitions 0/186 dead transitions. [2022-11-25 15:33:46,158 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 186 transitions, 916 flow [2022-11-25 15:33:46,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 15:33:46,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 15:33:46,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1795 transitions. [2022-11-25 15:33:46,164 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5310650887573964 [2022-11-25 15:33:46,164 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1795 transitions. [2022-11-25 15:33:46,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1795 transitions. [2022-11-25 15:33:46,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:33:46,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1795 transitions. [2022-11-25 15:33:46,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 179.5) internal successors, (1795), 10 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states 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 15:33:46,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 338.0) internal successors, (3718), 11 states have internal predecessors, (3718), 0 states have call successors, (0), 0 states 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 15:33:46,179 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 338.0) internal successors, (3718), 11 states have internal predecessors, (3718), 0 states have call successors, (0), 0 states 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 15:33:46,179 INFO L175 Difference]: Start difference. First operand has 38 places, 37 transitions, 124 flow. Second operand 10 states and 1795 transitions. [2022-11-25 15:33:46,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 186 transitions, 916 flow [2022-11-25 15:33:46,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 186 transitions, 903 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:33:46,188 INFO L231 Difference]: Finished difference. Result has 50 places, 55 transitions, 292 flow [2022-11-25 15:33:46,188 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=292, PETRI_PLACES=50, PETRI_TRANSITIONS=55} [2022-11-25 15:33:46,189 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 16 predicate places. [2022-11-25 15:33:46,189 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 55 transitions, 292 flow [2022-11-25 15:33:46,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 164.6) internal successors, (1646), 10 states have internal predecessors, (1646), 0 states have call successors, (0), 0 states 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 15:33:46,191 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:33:46,191 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:46,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b40117-b049-4e82-bb2a-a73494637ea2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 15:33:46,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b40117-b049-4e82-bb2a-a73494637ea2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:46,398 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 15:33:46,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:46,399 INFO L85 PathProgramCache]: Analyzing trace with hash 508516886, now seen corresponding path program 1 times [2022-11-25 15:33:46,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:46,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786460139] [2022-11-25 15:33:46,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:46,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:46,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:46,560 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 15:33:46,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:46,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786460139] [2022-11-25 15:33:46,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786460139] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:33:46,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:33:46,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 15:33:46,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581888753] [2022-11-25 15:33:46,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:33:46,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:33:46,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:46,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:33:46,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:33:46,584 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 338 [2022-11-25 15:33:46,586 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 55 transitions, 292 flow. Second operand has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states 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 15:33:46,586 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:33:46,586 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 338 [2022-11-25 15:33:46,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:33:46,784 INFO L130 PetriNetUnfolder]: 582/1087 cut-off events. [2022-11-25 15:33:46,784 INFO L131 PetriNetUnfolder]: For 471/471 co-relation queries the response was YES. [2022-11-25 15:33:46,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2698 conditions, 1087 events. 582/1087 cut-off events. For 471/471 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 4623 event pairs, 98 based on Foata normal form. 0/975 useless extension candidates. Maximal degree in co-relation 1748. Up to 802 conditions per place. [2022-11-25 15:33:46,792 INFO L137 encePairwiseOnDemand]: 332/338 looper letters, 45 selfloop transitions, 6 changer transitions 0/54 dead transitions. [2022-11-25 15:33:46,792 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 54 transitions, 335 flow [2022-11-25 15:33:46,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:33:46,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:33:46,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 529 transitions. [2022-11-25 15:33:46,794 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5216962524654832 [2022-11-25 15:33:46,795 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 529 transitions. [2022-11-25 15:33:46,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 529 transitions. [2022-11-25 15:33:46,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:33:46,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 529 transitions. [2022-11-25 15:33:46,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.33333333333334) internal successors, (529), 3 states have internal predecessors, (529), 0 states have call successors, (0), 0 states 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 15:33:46,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 338.0) internal successors, (1352), 4 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states 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 15:33:46,800 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 338.0) internal successors, (1352), 4 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states 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 15:33:46,800 INFO L175 Difference]: Start difference. First operand has 50 places, 55 transitions, 292 flow. Second operand 3 states and 529 transitions. [2022-11-25 15:33:46,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 54 transitions, 335 flow [2022-11-25 15:33:46,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 54 transitions, 323 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-11-25 15:33:46,805 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 212 flow [2022-11-25 15:33:46,805 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=212, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2022-11-25 15:33:46,806 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 14 predicate places. [2022-11-25 15:33:46,806 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 212 flow [2022-11-25 15:33:46,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states 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 15:33:46,807 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:33:46,807 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:46,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 15:33:46,808 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 15:33:46,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:46,808 INFO L85 PathProgramCache]: Analyzing trace with hash -695354890, now seen corresponding path program 1 times [2022-11-25 15:33:46,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:46,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579906925] [2022-11-25 15:33:46,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:46,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:46,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:46,920 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 15:33:46,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:46,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579906925] [2022-11-25 15:33:46,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579906925] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:33:46,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:33:46,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 15:33:46,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166718878] [2022-11-25 15:33:46,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:33:46,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 15:33:46,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:46,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 15:33:46,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:33:46,972 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 338 [2022-11-25 15:33:46,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 212 flow. Second operand has 5 states, 5 states have (on average 164.4) internal successors, (822), 5 states have internal predecessors, (822), 0 states have call successors, (0), 0 states 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 15:33:46,974 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:33:46,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 338 [2022-11-25 15:33:46,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:33:47,249 INFO L130 PetriNetUnfolder]: 736/1335 cut-off events. [2022-11-25 15:33:47,249 INFO L131 PetriNetUnfolder]: For 478/478 co-relation queries the response was YES. [2022-11-25 15:33:47,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3478 conditions, 1335 events. 736/1335 cut-off events. For 478/478 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 5494 event pairs, 220 based on Foata normal form. 12/1309 useless extension candidates. Maximal degree in co-relation 2694. Up to 529 conditions per place. [2022-11-25 15:33:47,259 INFO L137 encePairwiseOnDemand]: 332/338 looper letters, 80 selfloop transitions, 11 changer transitions 0/91 dead transitions. [2022-11-25 15:33:47,259 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 91 transitions, 536 flow [2022-11-25 15:33:47,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 15:33:47,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 15:33:47,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 889 transitions. [2022-11-25 15:33:47,262 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5260355029585799 [2022-11-25 15:33:47,262 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 889 transitions. [2022-11-25 15:33:47,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 889 transitions. [2022-11-25 15:33:47,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:33:47,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 889 transitions. [2022-11-25 15:33:47,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 177.8) internal successors, (889), 5 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:47,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 338.0) internal successors, (2028), 6 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states 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 15:33:47,269 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 338.0) internal successors, (2028), 6 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states 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 15:33:47,269 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 212 flow. Second operand 5 states and 889 transitions. [2022-11-25 15:33:47,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 91 transitions, 536 flow [2022-11-25 15:33:47,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 91 transitions, 520 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:33:47,274 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 263 flow [2022-11-25 15:33:47,274 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=263, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2022-11-25 15:33:47,275 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 19 predicate places. [2022-11-25 15:33:47,275 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 263 flow [2022-11-25 15:33:47,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 164.4) internal successors, (822), 5 states have internal predecessors, (822), 0 states have call successors, (0), 0 states 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 15:33:47,276 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:33:47,276 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:47,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 15:33:47,277 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 15:33:47,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:47,277 INFO L85 PathProgramCache]: Analyzing trace with hash 633345929, now seen corresponding path program 1 times [2022-11-25 15:33:47,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:47,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136508606] [2022-11-25 15:33:47,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:47,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:47,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:48,083 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 15:33:48,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:48,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136508606] [2022-11-25 15:33:48,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136508606] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:33:48,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:33:48,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 15:33:48,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843475365] [2022-11-25 15:33:48,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:33:48,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 15:33:48,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:48,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 15:33:48,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-25 15:33:48,427 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 338 [2022-11-25 15:33:48,428 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 263 flow. Second operand has 10 states, 10 states have (on average 150.0) internal successors, (1500), 10 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states 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 15:33:48,429 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:33:48,429 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 338 [2022-11-25 15:33:48,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:33:49,166 INFO L130 PetriNetUnfolder]: 1027/1892 cut-off events. [2022-11-25 15:33:49,166 INFO L131 PetriNetUnfolder]: For 1495/1495 co-relation queries the response was YES. [2022-11-25 15:33:49,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4883 conditions, 1892 events. 1027/1892 cut-off events. For 1495/1495 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 9132 event pairs, 308 based on Foata normal form. 0/1808 useless extension candidates. Maximal degree in co-relation 2901. Up to 1099 conditions per place. [2022-11-25 15:33:49,179 INFO L137 encePairwiseOnDemand]: 329/338 looper letters, 108 selfloop transitions, 10 changer transitions 4/125 dead transitions. [2022-11-25 15:33:49,180 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 125 transitions, 780 flow [2022-11-25 15:33:49,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 15:33:49,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 15:33:49,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1289 transitions. [2022-11-25 15:33:49,184 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47670118343195267 [2022-11-25 15:33:49,184 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1289 transitions. [2022-11-25 15:33:49,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1289 transitions. [2022-11-25 15:33:49,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:33:49,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1289 transitions. [2022-11-25 15:33:49,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 161.125) internal successors, (1289), 8 states have internal predecessors, (1289), 0 states have call successors, (0), 0 states 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 15:33:49,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 338.0) internal successors, (3042), 9 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states 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 15:33:49,198 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 338.0) internal successors, (3042), 9 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states 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 15:33:49,198 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 263 flow. Second operand 8 states and 1289 transitions. [2022-11-25 15:33:49,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 125 transitions, 780 flow [2022-11-25 15:33:49,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 125 transitions, 762 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-11-25 15:33:49,205 INFO L231 Difference]: Finished difference. Result has 63 places, 56 transitions, 324 flow [2022-11-25 15:33:49,206 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=324, PETRI_PLACES=63, PETRI_TRANSITIONS=56} [2022-11-25 15:33:49,206 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 29 predicate places. [2022-11-25 15:33:49,207 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 56 transitions, 324 flow [2022-11-25 15:33:49,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 150.0) internal successors, (1500), 10 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states 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 15:33:49,208 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:33:49,208 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:49,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 15:33:49,209 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 15:33:49,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:49,209 INFO L85 PathProgramCache]: Analyzing trace with hash -156765997, now seen corresponding path program 2 times [2022-11-25 15:33:49,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:49,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211862461] [2022-11-25 15:33:49,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:49,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:49,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:50,054 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 15:33:50,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:50,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211862461] [2022-11-25 15:33:50,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211862461] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:33:50,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:33:50,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 15:33:50,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691318955] [2022-11-25 15:33:50,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:33:50,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 15:33:50,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:50,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 15:33:50,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-25 15:33:50,615 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 338 [2022-11-25 15:33:50,617 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 56 transitions, 324 flow. Second operand has 10 states, 10 states have (on average 150.0) internal successors, (1500), 10 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states 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 15:33:50,617 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:33:50,617 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 338 [2022-11-25 15:33:50,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:33:51,506 INFO L130 PetriNetUnfolder]: 1325/2428 cut-off events. [2022-11-25 15:33:51,506 INFO L131 PetriNetUnfolder]: For 1821/1821 co-relation queries the response was YES. [2022-11-25 15:33:51,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6648 conditions, 2428 events. 1325/2428 cut-off events. For 1821/1821 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 12114 event pairs, 393 based on Foata normal form. 0/2313 useless extension candidates. Maximal degree in co-relation 4256. Up to 1034 conditions per place. [2022-11-25 15:33:51,528 INFO L137 encePairwiseOnDemand]: 330/338 looper letters, 108 selfloop transitions, 14 changer transitions 4/129 dead transitions. [2022-11-25 15:33:51,528 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 129 transitions, 857 flow [2022-11-25 15:33:51,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 15:33:51,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 15:33:51,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1289 transitions. [2022-11-25 15:33:51,532 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47670118343195267 [2022-11-25 15:33:51,532 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1289 transitions. [2022-11-25 15:33:51,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1289 transitions. [2022-11-25 15:33:51,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:33:51,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1289 transitions. [2022-11-25 15:33:51,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 161.125) internal successors, (1289), 8 states have internal predecessors, (1289), 0 states have call successors, (0), 0 states 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 15:33:51,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 338.0) internal successors, (3042), 9 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states 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 15:33:51,542 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 338.0) internal successors, (3042), 9 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states 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 15:33:51,542 INFO L175 Difference]: Start difference. First operand has 63 places, 56 transitions, 324 flow. Second operand 8 states and 1289 transitions. [2022-11-25 15:33:51,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 129 transitions, 857 flow [2022-11-25 15:33:51,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 129 transitions, 857 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 15:33:51,550 INFO L231 Difference]: Finished difference. Result has 73 places, 61 transitions, 402 flow [2022-11-25 15:33:51,551 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=402, PETRI_PLACES=73, PETRI_TRANSITIONS=61} [2022-11-25 15:33:51,551 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 39 predicate places. [2022-11-25 15:33:51,552 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 61 transitions, 402 flow [2022-11-25 15:33:51,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 150.0) internal successors, (1500), 10 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states 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 15:33:51,553 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:33:51,553 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:51,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 15:33:51,553 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 15:33:51,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:51,554 INFO L85 PathProgramCache]: Analyzing trace with hash 396549998, now seen corresponding path program 1 times [2022-11-25 15:33:51,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:51,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203654981] [2022-11-25 15:33:51,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:51,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:51,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:51,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:33:51,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:51,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203654981] [2022-11-25 15:33:51,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203654981] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:33:51,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596808971] [2022-11-25 15:33:51,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:51,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:51,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b40117-b049-4e82-bb2a-a73494637ea2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:33:51,689 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b40117-b049-4e82-bb2a-a73494637ea2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:33:51,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b40117-b049-4e82-bb2a-a73494637ea2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 15:33:51,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:51,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 15:33:51,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:33:51,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:33:51,894 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:33:51,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596808971] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:33:51,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 15:33:51,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-11-25 15:33:51,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760489777] [2022-11-25 15:33:51,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:33:51,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 15:33:51,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:51,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 15:33:51,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-25 15:33:51,933 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 338 [2022-11-25 15:33:51,934 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 61 transitions, 402 flow. Second operand has 6 states, 6 states have (on average 161.83333333333334) internal successors, (971), 6 states have internal predecessors, (971), 0 states have call successors, (0), 0 states 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 15:33:51,934 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:33:51,934 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 338 [2022-11-25 15:33:51,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:33:52,460 INFO L130 PetriNetUnfolder]: 1402/2542 cut-off events. [2022-11-25 15:33:52,461 INFO L131 PetriNetUnfolder]: For 2270/2270 co-relation queries the response was YES. [2022-11-25 15:33:52,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7331 conditions, 2542 events. 1402/2542 cut-off events. For 2270/2270 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 12418 event pairs, 575 based on Foata normal form. 16/2442 useless extension candidates. Maximal degree in co-relation 5032. Up to 1015 conditions per place. [2022-11-25 15:33:52,481 INFO L137 encePairwiseOnDemand]: 331/338 looper letters, 107 selfloop transitions, 16 changer transitions 0/123 dead transitions. [2022-11-25 15:33:52,481 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 123 transitions, 904 flow [2022-11-25 15:33:52,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 15:33:52,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 15:33:52,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1201 transitions. [2022-11-25 15:33:52,485 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5076077768385461 [2022-11-25 15:33:52,485 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1201 transitions. [2022-11-25 15:33:52,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1201 transitions. [2022-11-25 15:33:52,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:33:52,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1201 transitions. [2022-11-25 15:33:52,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 171.57142857142858) internal successors, (1201), 7 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states 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 15:33:52,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 338.0) internal successors, (2704), 8 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states 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 15:33:52,495 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 338.0) internal successors, (2704), 8 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states 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 15:33:52,495 INFO L175 Difference]: Start difference. First operand has 73 places, 61 transitions, 402 flow. Second operand 7 states and 1201 transitions. [2022-11-25 15:33:52,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 123 transitions, 904 flow [2022-11-25 15:33:52,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 123 transitions, 880 flow, removed 9 selfloop flow, removed 3 redundant places. [2022-11-25 15:33:52,505 INFO L231 Difference]: Finished difference. Result has 78 places, 70 transitions, 523 flow [2022-11-25 15:33:52,505 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=523, PETRI_PLACES=78, PETRI_TRANSITIONS=70} [2022-11-25 15:33:52,505 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 44 predicate places. [2022-11-25 15:33:52,506 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 70 transitions, 523 flow [2022-11-25 15:33:52,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 161.83333333333334) internal successors, (971), 6 states have internal predecessors, (971), 0 states have call successors, (0), 0 states 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 15:33:52,506 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:33:52,506 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:52,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b40117-b049-4e82-bb2a-a73494637ea2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 15:33:52,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b40117-b049-4e82-bb2a-a73494637ea2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:52,713 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 15:33:52,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:52,713 INFO L85 PathProgramCache]: Analyzing trace with hash 219532501, now seen corresponding path program 1 times [2022-11-25 15:33:52,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:52,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963848553] [2022-11-25 15:33:52,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:52,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:52,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:33:52,755 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 15:33:52,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:33:52,824 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 15:33:52,824 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 15:33:52,825 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2022-11-25 15:33:52,827 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2022-11-25 15:33:52,827 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2022-11-25 15:33:52,828 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-25 15:33:52,828 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-25 15:33:52,828 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-25 15:33:52,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 15:33:52,829 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:52,835 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-11-25 15:33:52,835 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-25 15:33:52,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 03:33:52 BasicIcfg [2022-11-25 15:33:52,899 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-25 15:33:52,899 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-25 15:33:52,899 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-25 15:33:52,899 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-25 15:33:52,900 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:33:37" (3/4) ... [2022-11-25 15:33:52,902 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-25 15:33:52,988 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b40117-b049-4e82-bb2a-a73494637ea2/bin/uautomizer-ZsLfNo2U6R/witness.graphml [2022-11-25 15:33:52,989 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-25 15:33:52,989 INFO L158 Benchmark]: Toolchain (without parser) took 16943.91ms. Allocated memory was 186.6MB in the beginning and 287.3MB in the end (delta: 100.7MB). Free memory was 138.5MB in the beginning and 179.0MB in the end (delta: -40.5MB). Peak memory consumption was 62.2MB. Max. memory is 16.1GB. [2022-11-25 15:33:52,990 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 134.2MB. Free memory was 75.8MB in the beginning and 75.7MB in the end (delta: 117.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 15:33:52,990 INFO L158 Benchmark]: CACSL2BoogieTranslator took 844.80ms. Allocated memory is still 186.6MB. Free memory was 137.9MB in the beginning and 109.1MB in the end (delta: 28.8MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2022-11-25 15:33:52,990 INFO L158 Benchmark]: Boogie Procedure Inliner took 121.36ms. Allocated memory is still 186.6MB. Free memory was 108.6MB in the beginning and 154.8MB in the end (delta: -46.2MB). Peak memory consumption was 7.8MB. Max. memory is 16.1GB. [2022-11-25 15:33:52,990 INFO L158 Benchmark]: Boogie Preprocessor took 83.55ms. Allocated memory is still 186.6MB. Free memory was 154.8MB in the beginning and 152.5MB in the end (delta: 2.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-25 15:33:52,991 INFO L158 Benchmark]: RCFGBuilder took 583.30ms. Allocated memory is still 186.6MB. Free memory was 152.5MB in the beginning and 133.8MB in the end (delta: 18.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-25 15:33:52,991 INFO L158 Benchmark]: TraceAbstraction took 15214.29ms. Allocated memory was 186.6MB in the beginning and 287.3MB in the end (delta: 100.7MB). Free memory was 133.8MB in the beginning and 188.4MB in the end (delta: -54.6MB). Peak memory consumption was 48.2MB. Max. memory is 16.1GB. [2022-11-25 15:33:52,992 INFO L158 Benchmark]: Witness Printer took 89.64ms. Allocated memory is still 287.3MB. Free memory was 188.4MB in the beginning and 179.0MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-25 15:33:52,994 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 134.2MB. Free memory was 75.8MB in the beginning and 75.7MB in the end (delta: 117.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 844.80ms. Allocated memory is still 186.6MB. Free memory was 137.9MB in the beginning and 109.1MB in the end (delta: 28.8MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 121.36ms. Allocated memory is still 186.6MB. Free memory was 108.6MB in the beginning and 154.8MB in the end (delta: -46.2MB). Peak memory consumption was 7.8MB. Max. memory is 16.1GB. * Boogie Preprocessor took 83.55ms. Allocated memory is still 186.6MB. Free memory was 154.8MB in the beginning and 152.5MB in the end (delta: 2.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 583.30ms. Allocated memory is still 186.6MB. Free memory was 152.5MB in the beginning and 133.8MB in the end (delta: 18.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 15214.29ms. Allocated memory was 186.6MB in the beginning and 287.3MB in the end (delta: 100.7MB). Free memory was 133.8MB in the beginning and 188.4MB in the end (delta: -54.6MB). Peak memory consumption was 48.2MB. Max. memory is 16.1GB. * Witness Printer took 89.64ms. Allocated memory is still 287.3MB. Free memory was 188.4MB in the beginning and 179.0MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.5s, 164 PlacesBefore, 34 PlacesAfterwards, 167 TransitionsBefore, 32 TransitionsAfterwards, 9552 CoEnabledTransitionPairs, 6 FixpointIterations, 29 TrivialSequentialCompositions, 101 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 24 ConcurrentYvCompositions, 5 ChoiceCompositions, 159 TotalNumberOfCompositions, 11047 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 8706, independent: 8548, independent conditional: 0, independent unconditional: 8548, dependent: 158, dependent conditional: 0, dependent unconditional: 158, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 6834, independent: 6762, independent conditional: 0, independent unconditional: 6762, dependent: 72, dependent conditional: 0, dependent unconditional: 72, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 6834, independent: 6746, independent conditional: 0, independent unconditional: 6746, dependent: 88, dependent conditional: 0, dependent unconditional: 88, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 88, independent: 16, independent conditional: 0, independent unconditional: 16, dependent: 72, dependent conditional: 0, dependent unconditional: 72, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 203, independent: 26, independent conditional: 0, independent unconditional: 26, dependent: 178, dependent conditional: 0, dependent unconditional: 178, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 8706, independent: 1786, independent conditional: 0, independent unconditional: 1786, dependent: 86, dependent conditional: 0, dependent unconditional: 86, unknown: 6834, unknown conditional: 0, unknown unconditional: 6834] , Statistics on independence cache: Total cache size (in pairs): 237, Positive cache size: 212, Positive conditional cache size: 0, Positive unconditional cache size: 212, Negative cache size: 25, Negative conditional cache size: 0, Negative unconditional cache size: 25, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 941]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L935] 0 static int top=0; [L936] 0 static unsigned int arr[(800)]; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1020] 0 pthread_t id1, id2; [L1022] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={5:0}, id2={6:0}, m={4:0}, pthread_create(&id1, ((void *)0), t1, ((void *)0))=9, top=0] [L989] 1 int i; [L990] 1 unsigned int tmp; [L991] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L991] COND TRUE 1 i<(800) [L994] 1 tmp = __VERIFIER_nondet_uint() [L995] CALL 1 assume_abort_if_not(tmp < (800)) [L23] COND FALSE 1 !(!cond) [L995] RET 1 assume_abort_if_not(tmp < (800)) [L996] CALL, EXPR 1 push(arr,tmp) [L1023] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={5:0}, id2={6:0}, m={4:0}, pthread_create(&id2, ((void *)0), t2, ((void *)0))=10, top=0] [L961] COND FALSE 1 !(top==(800)) [L968] CALL, EXPR 1 get_top() [L1005] 2 int i; [L1006] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L953] 1 return top; [L968] RET, EXPR 1 get_top() [L968] 1 stack[get_top()] = x [L969] CALL 1 inc_top() [L945] 1 top++ [L969] RET 1 inc_top() [L971] 1 return 0; [L996] RET, EXPR 1 push(arr,tmp) [L996] COND FALSE 1 !(push(arr,tmp)==(-1)) [L998] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=7, top=1] [L991] 1 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, tmp=7, top=1] [L1006] COND TRUE 2 i<(800) [L1009] COND TRUE 2 \read(flag) [L1011] CALL, EXPR 2 pop(arr) [L975] CALL, EXPR 2 get_top() [L953] 2 return top; [L975] RET, EXPR 2 get_top() [L975] COND FALSE 2 !(get_top()==0) [L982] CALL 2 dec_top() [L949] 2 top-- [L982] RET 2 dec_top() [L983] CALL, EXPR 2 get_top() [L953] 2 return top; [L983] RET, EXPR 2 get_top() [L983] EXPR 2 stack[get_top()] [L983] 2 return stack[get_top()]; [L1011] RET, EXPR 2 pop(arr) [L1011] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1006] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1006] COND TRUE 2 i<(800) [L1009] COND TRUE 2 \read(flag) [L1011] CALL, EXPR 2 pop(arr) [L975] CALL, EXPR 2 get_top() [L953] 2 return top; [L975] RET, EXPR 2 get_top() [L975] COND TRUE 2 get_top()==0 [L978] 2 return (-2); [L1011] RET, EXPR 2 pop(arr) [L1011] COND TRUE 2 !(pop(arr)!=(-2)) [L1012] CALL 2 error() [L941] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: 1023]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1022]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 941]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 288 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 14.9s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 5.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1181 SdHoareTripleChecker+Valid, 2.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1001 mSDsluCounter, 510 SdHoareTripleChecker+Invalid, 2.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 487 mSDsCounter, 68 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2863 IncrementalHoareTripleChecker+Invalid, 2931 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 68 mSolverCounterUnsat, 23 mSDtfsCounter, 2863 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 103 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=523occurred in iteration=9, InterpolantAutomatonStates: 50, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 199 NumberOfCodeBlocks, 199 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 177 ConstructedInterpolants, 0 QuantifiedInterpolants, 1507 SizeOfPredicates, 3 NumberOfNonLiveVariables, 448 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 12 InterpolantComputations, 8 PerfectInterpolantSequences, 7/15 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-25 15:33:53,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b40117-b049-4e82-bb2a-a73494637ea2/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE