./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/fib_unsafe-11.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_a8cdc5d2-a5eb-4e0b-ba15-551c25c50c0f/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8cdc5d2-a5eb-4e0b-ba15-551c25c50c0f/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8cdc5d2-a5eb-4e0b-ba15-551c25c50c0f/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8cdc5d2-a5eb-4e0b-ba15-551c25c50c0f/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/fib_unsafe-11.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8cdc5d2-a5eb-4e0b-ba15-551c25c50c0f/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8cdc5d2-a5eb-4e0b-ba15-551c25c50c0f/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c7fcf270fc424e515c4f8db675612b386dd73dc1dc6be434bc2c22ad47252dc7 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 19:34:45,945 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 19:34:45,951 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 19:34:45,992 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 19:34:45,993 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 19:34:45,997 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 19:34:45,999 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 19:34:46,004 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 19:34:46,006 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 19:34:46,009 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 19:34:46,011 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 19:34:46,014 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 19:34:46,016 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 19:34:46,021 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 19:34:46,022 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 19:34:46,024 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 19:34:46,026 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 19:34:46,028 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 19:34:46,029 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 19:34:46,035 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 19:34:46,036 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 19:34:46,039 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 19:34:46,040 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 19:34:46,043 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 19:34:46,049 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 19:34:46,053 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 19:34:46,053 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 19:34:46,054 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 19:34:46,056 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 19:34:46,057 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 19:34:46,058 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 19:34:46,059 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 19:34:46,061 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 19:34:46,062 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 19:34:46,064 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 19:34:46,065 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 19:34:46,066 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 19:34:46,066 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 19:34:46,066 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 19:34:46,067 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 19:34:46,068 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 19:34:46,069 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8cdc5d2-a5eb-4e0b-ba15-551c25c50c0f/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 19:34:46,107 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 19:34:46,107 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 19:34:46,108 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 19:34:46,108 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 19:34:46,109 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 19:34:46,109 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 19:34:46,110 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 19:34:46,110 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 19:34:46,111 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 19:34:46,111 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 19:34:46,112 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 19:34:46,112 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 19:34:46,112 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 19:34:46,113 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 19:34:46,113 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 19:34:46,113 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 19:34:46,113 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 19:34:46,113 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 19:34:46,114 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 19:34:46,114 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 19:34:46,114 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 19:34:46,114 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 19:34:46,115 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 19:34:46,115 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 19:34:46,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:34:46,115 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 19:34:46,115 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 19:34:46,116 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 19:34:46,116 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 19:34:46,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 19:34:46,116 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 19:34:46,117 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 19:34:46,117 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 19:34:46,117 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8cdc5d2-a5eb-4e0b-ba15-551c25c50c0f/bin/uautomizer-TMbwUNV5ro/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8cdc5d2-a5eb-4e0b-ba15-551c25c50c0f/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7fcf270fc424e515c4f8db675612b386dd73dc1dc6be434bc2c22ad47252dc7 [2022-11-18 19:34:46,405 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 19:34:46,443 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 19:34:46,447 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 19:34:46,448 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 19:34:46,449 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 19:34:46,450 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8cdc5d2-a5eb-4e0b-ba15-551c25c50c0f/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/pthread/fib_unsafe-11.i [2022-11-18 19:34:46,539 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8cdc5d2-a5eb-4e0b-ba15-551c25c50c0f/bin/uautomizer-TMbwUNV5ro/data/65fc0bfb7/78287ade92914279ba49637aebaf02e8/FLAG0a743eefe [2022-11-18 19:34:47,128 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 19:34:47,129 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8cdc5d2-a5eb-4e0b-ba15-551c25c50c0f/sv-benchmarks/c/pthread/fib_unsafe-11.i [2022-11-18 19:34:47,143 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8cdc5d2-a5eb-4e0b-ba15-551c25c50c0f/bin/uautomizer-TMbwUNV5ro/data/65fc0bfb7/78287ade92914279ba49637aebaf02e8/FLAG0a743eefe [2022-11-18 19:34:47,427 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8cdc5d2-a5eb-4e0b-ba15-551c25c50c0f/bin/uautomizer-TMbwUNV5ro/data/65fc0bfb7/78287ade92914279ba49637aebaf02e8 [2022-11-18 19:34:47,430 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 19:34:47,432 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 19:34:47,434 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 19:34:47,434 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 19:34:47,445 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 19:34:47,446 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:34:47" (1/1) ... [2022-11-18 19:34:47,447 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ad403d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:34:47, skipping insertion in model container [2022-11-18 19:34:47,448 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:34:47" (1/1) ... [2022-11-18 19:34:47,456 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 19:34:47,500 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 19:34:47,903 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8cdc5d2-a5eb-4e0b-ba15-551c25c50c0f/sv-benchmarks/c/pthread/fib_unsafe-11.i[30243,30256] [2022-11-18 19:34:47,934 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:34:47,945 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 19:34:47,983 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8cdc5d2-a5eb-4e0b-ba15-551c25c50c0f/sv-benchmarks/c/pthread/fib_unsafe-11.i[30243,30256] [2022-11-18 19:34:47,991 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:34:48,022 INFO L208 MainTranslator]: Completed translation [2022-11-18 19:34:48,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:34:48 WrapperNode [2022-11-18 19:34:48,023 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 19:34:48,028 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 19:34:48,028 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 19:34:48,028 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 19:34:48,036 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:34:48" (1/1) ... [2022-11-18 19:34:48,049 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:34:48" (1/1) ... [2022-11-18 19:34:48,078 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2022-11-18 19:34:48,078 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 19:34:48,079 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 19:34:48,079 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 19:34:48,080 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 19:34:48,089 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:34:48" (1/1) ... [2022-11-18 19:34:48,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:34:48" (1/1) ... [2022-11-18 19:34:48,108 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:34:48" (1/1) ... [2022-11-18 19:34:48,109 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:34:48" (1/1) ... [2022-11-18 19:34:48,114 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:34:48" (1/1) ... [2022-11-18 19:34:48,126 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:34:48" (1/1) ... [2022-11-18 19:34:48,129 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:34:48" (1/1) ... [2022-11-18 19:34:48,130 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:34:48" (1/1) ... [2022-11-18 19:34:48,133 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 19:34:48,134 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 19:34:48,134 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 19:34:48,134 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 19:34:48,139 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:34:48" (1/1) ... [2022-11-18 19:34:48,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:34:48,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8cdc5d2-a5eb-4e0b-ba15-551c25c50c0f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:34:48,177 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8cdc5d2-a5eb-4e0b-ba15-551c25c50c0f/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 19:34:48,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8cdc5d2-a5eb-4e0b-ba15-551c25c50c0f/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 19:34:48,220 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-18 19:34:48,220 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-18 19:34:48,220 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-18 19:34:48,220 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-18 19:34:48,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 19:34:48,221 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-18 19:34:48,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 19:34:48,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 19:34:48,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 19:34:48,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 19:34:48,222 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-18 19:34:48,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 19:34:48,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 19:34:48,223 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 19:34:48,374 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 19:34:48,376 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 19:34:48,624 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 19:34:48,631 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 19:34:48,632 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-18 19:34:48,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:34:48 BoogieIcfgContainer [2022-11-18 19:34:48,635 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 19:34:48,638 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 19:34:48,638 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 19:34:48,642 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 19:34:48,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 07:34:47" (1/3) ... [2022-11-18 19:34:48,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13409ff2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:34:48, skipping insertion in model container [2022-11-18 19:34:48,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:34:48" (2/3) ... [2022-11-18 19:34:48,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13409ff2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:34:48, skipping insertion in model container [2022-11-18 19:34:48,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:34:48" (3/3) ... [2022-11-18 19:34:48,646 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-11.i [2022-11-18 19:34:48,655 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 19:34:48,664 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 19:34:48,665 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 19:34:48,665 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 19:34:48,723 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 19:34:48,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 101 transitions, 212 flow [2022-11-18 19:34:48,859 INFO L130 PetriNetUnfolder]: 7/99 cut-off events. [2022-11-18 19:34:48,860 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 19:34:48,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 99 events. 7/99 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 69 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 70. Up to 2 conditions per place. [2022-11-18 19:34:48,875 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 101 transitions, 212 flow [2022-11-18 19:34:48,884 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 99 transitions, 204 flow [2022-11-18 19:34:48,910 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 19:34:48,917 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;@3c5c5a91, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 19:34:48,917 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-18 19:34:48,956 INFO L130 PetriNetUnfolder]: 6/87 cut-off events. [2022-11-18 19:34:48,956 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 19:34:48,956 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:34:48,957 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:34:48,958 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:34:48,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:34:48,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1370645073, now seen corresponding path program 1 times [2022-11-18 19:34:48,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:34:48,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998997110] [2022-11-18 19:34:48,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:34:48,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:34:49,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:49,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:49,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:34:49,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998997110] [2022-11-18 19:34:49,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998997110] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:34:49,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:34:49,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 19:34:49,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181062683] [2022-11-18 19:34:49,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:34:49,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 19:34:49,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:34:49,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 19:34:49,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 19:34:49,335 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 101 [2022-11-18 19:34:49,343 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 99 transitions, 204 flow. Second operand has 2 states, 2 states have (on average 95.5) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:49,344 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:34:49,344 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 101 [2022-11-18 19:34:49,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:34:49,412 INFO L130 PetriNetUnfolder]: 3/94 cut-off events. [2022-11-18 19:34:49,412 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 19:34:49,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 94 events. 3/94 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 66 event pairs, 0 based on Foata normal form. 5/95 useless extension candidates. Maximal degree in co-relation 66. Up to 3 conditions per place. [2022-11-18 19:34:49,417 INFO L137 encePairwiseOnDemand]: 97/101 looper letters, 2 selfloop transitions, 0 changer transitions 0/94 dead transitions. [2022-11-18 19:34:49,417 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 94 transitions, 198 flow [2022-11-18 19:34:49,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 19:34:49,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 19:34:49,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 194 transitions. [2022-11-18 19:34:49,432 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9603960396039604 [2022-11-18 19:34:49,433 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 194 transitions. [2022-11-18 19:34:49,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 194 transitions. [2022-11-18 19:34:49,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:34:49,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 194 transitions. [2022-11-18 19:34:49,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 97.0) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:49,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:49,451 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:49,453 INFO L175 Difference]: Start difference. First operand has 99 places, 99 transitions, 204 flow. Second operand 2 states and 194 transitions. [2022-11-18 19:34:49,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 94 transitions, 198 flow [2022-11-18 19:34:49,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 94 transitions, 196 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-18 19:34:49,462 INFO L231 Difference]: Finished difference. Result has 97 places, 94 transitions, 192 flow [2022-11-18 19:34:49,464 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=192, PETRI_PLACES=97, PETRI_TRANSITIONS=94} [2022-11-18 19:34:49,468 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -2 predicate places. [2022-11-18 19:34:49,468 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 94 transitions, 192 flow [2022-11-18 19:34:49,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 95.5) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:49,469 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:34:49,469 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:34:49,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 19:34:49,470 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:34:49,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:34:49,471 INFO L85 PathProgramCache]: Analyzing trace with hash 865086448, now seen corresponding path program 1 times [2022-11-18 19:34:49,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:34:49,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136578157] [2022-11-18 19:34:49,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:34:49,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:34:49,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:49,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:49,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:34:49,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136578157] [2022-11-18 19:34:49,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136578157] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:34:49,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:34:49,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:34:49,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440742067] [2022-11-18 19:34:49,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:34:49,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:34:49,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:34:49,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:34:49,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:34:49,629 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 101 [2022-11-18 19:34:49,630 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 94 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:49,630 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:34:49,630 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 101 [2022-11-18 19:34:49,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:34:49,675 INFO L130 PetriNetUnfolder]: 3/100 cut-off events. [2022-11-18 19:34:49,676 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 19:34:49,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 100 events. 3/100 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 62 event pairs, 0 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 115. Up to 6 conditions per place. [2022-11-18 19:34:49,678 INFO L137 encePairwiseOnDemand]: 98/101 looper letters, 9 selfloop transitions, 2 changer transitions 0/97 dead transitions. [2022-11-18 19:34:49,678 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 97 transitions, 220 flow [2022-11-18 19:34:49,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:34:49,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 19:34:49,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 276 transitions. [2022-11-18 19:34:49,681 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9108910891089109 [2022-11-18 19:34:49,681 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 276 transitions. [2022-11-18 19:34:49,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 276 transitions. [2022-11-18 19:34:49,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:34:49,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 276 transitions. [2022-11-18 19:34:49,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:49,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:49,686 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:49,686 INFO L175 Difference]: Start difference. First operand has 97 places, 94 transitions, 192 flow. Second operand 3 states and 276 transitions. [2022-11-18 19:34:49,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 97 transitions, 220 flow [2022-11-18 19:34:49,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 97 transitions, 220 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 19:34:49,690 INFO L231 Difference]: Finished difference. Result has 100 places, 95 transitions, 204 flow [2022-11-18 19:34:49,690 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=100, PETRI_TRANSITIONS=95} [2022-11-18 19:34:49,691 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, 1 predicate places. [2022-11-18 19:34:49,692 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 95 transitions, 204 flow [2022-11-18 19:34:49,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:49,692 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:34:49,693 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:34:49,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 19:34:49,693 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:34:49,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:34:49,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1310951925, now seen corresponding path program 1 times [2022-11-18 19:34:49,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:34:49,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079812782] [2022-11-18 19:34:49,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:34:49,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:34:49,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:49,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:49,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:34:49,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079812782] [2022-11-18 19:34:49,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079812782] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:34:49,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957945103] [2022-11-18 19:34:49,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:34:49,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:34:49,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8cdc5d2-a5eb-4e0b-ba15-551c25c50c0f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:34:49,972 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8cdc5d2-a5eb-4e0b-ba15-551c25c50c0f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:34:49,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8cdc5d2-a5eb-4e0b-ba15-551c25c50c0f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 19:34:50,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:50,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 19:34:50,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:34:50,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:50,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:34:50,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:50,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957945103] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:34:50,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:34:50,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 19:34:50,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603796840] [2022-11-18 19:34:50,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:34:50,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:34:50,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:34:50,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:34:50,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:34:50,363 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 101 [2022-11-18 19:34:50,365 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 95 transitions, 204 flow. Second operand has 10 states, 10 states have (on average 88.0) internal successors, (880), 10 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:50,366 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:34:50,366 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 101 [2022-11-18 19:34:50,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:34:50,486 INFO L130 PetriNetUnfolder]: 3/109 cut-off events. [2022-11-18 19:34:50,486 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-18 19:34:50,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 109 events. 3/109 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 2/108 useless extension candidates. Maximal degree in co-relation 138. Up to 6 conditions per place. [2022-11-18 19:34:50,488 INFO L137 encePairwiseOnDemand]: 95/101 looper letters, 10 selfloop transitions, 9 changer transitions 0/103 dead transitions. [2022-11-18 19:34:50,489 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 103 transitions, 260 flow [2022-11-18 19:34:50,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 19:34:50,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 19:34:50,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 795 transitions. [2022-11-18 19:34:50,493 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8745874587458746 [2022-11-18 19:34:50,493 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 795 transitions. [2022-11-18 19:34:50,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 795 transitions. [2022-11-18 19:34:50,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:34:50,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 795 transitions. [2022-11-18 19:34:50,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 88.33333333333333) internal successors, (795), 9 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:50,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 101.0) internal successors, (1010), 10 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:50,501 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 101.0) internal successors, (1010), 10 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:50,502 INFO L175 Difference]: Start difference. First operand has 100 places, 95 transitions, 204 flow. Second operand 9 states and 795 transitions. [2022-11-18 19:34:50,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 103 transitions, 260 flow [2022-11-18 19:34:50,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 103 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 19:34:50,506 INFO L231 Difference]: Finished difference. Result has 110 places, 101 transitions, 252 flow [2022-11-18 19:34:50,506 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=252, PETRI_PLACES=110, PETRI_TRANSITIONS=101} [2022-11-18 19:34:50,507 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, 11 predicate places. [2022-11-18 19:34:50,507 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 101 transitions, 252 flow [2022-11-18 19:34:50,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 88.0) internal successors, (880), 10 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:50,508 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:34:50,508 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:34:50,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8cdc5d2-a5eb-4e0b-ba15-551c25c50c0f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-18 19:34:50,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8cdc5d2-a5eb-4e0b-ba15-551c25c50c0f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:34:50,715 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:34:50,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:34:50,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1106224747, now seen corresponding path program 2 times [2022-11-18 19:34:50,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:34:50,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897801963] [2022-11-18 19:34:50,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:34:50,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:34:50,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:50,905 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:50,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:34:50,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897801963] [2022-11-18 19:34:50,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897801963] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:34:50,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576498698] [2022-11-18 19:34:50,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:34:50,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:34:50,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8cdc5d2-a5eb-4e0b-ba15-551c25c50c0f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:34:50,908 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8cdc5d2-a5eb-4e0b-ba15-551c25c50c0f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:34:50,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8cdc5d2-a5eb-4e0b-ba15-551c25c50c0f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 19:34:51,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:34:51,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:34:51,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 19:34:51,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:34:51,110 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:51,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:34:51,256 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:51,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576498698] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:34:51,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:34:51,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-18 19:34:51,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868057017] [2022-11-18 19:34:51,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:34:51,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 19:34:51,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:34:51,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 19:34:51,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-18 19:34:51,264 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 101 [2022-11-18 19:34:51,267 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 101 transitions, 252 flow. Second operand has 18 states, 18 states have (on average 88.0) internal successors, (1584), 18 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:51,267 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:34:51,268 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 101 [2022-11-18 19:34:51,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:34:51,525 INFO L130 PetriNetUnfolder]: 3/137 cut-off events. [2022-11-18 19:34:51,525 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-18 19:34:51,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236 conditions, 137 events. 3/137 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 4/138 useless extension candidates. Maximal degree in co-relation 229. Up to 11 conditions per place. [2022-11-18 19:34:51,530 INFO L137 encePairwiseOnDemand]: 95/101 looper letters, 14 selfloop transitions, 21 changer transitions 0/119 dead transitions. [2022-11-18 19:34:51,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 119 transitions, 418 flow [2022-11-18 19:34:51,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 19:34:51,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 19:34:51,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1845 transitions. [2022-11-18 19:34:51,537 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8698727015558698 [2022-11-18 19:34:51,538 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1845 transitions. [2022-11-18 19:34:51,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1845 transitions. [2022-11-18 19:34:51,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:34:51,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1845 transitions. [2022-11-18 19:34:51,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 87.85714285714286) internal successors, (1845), 21 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:51,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 101.0) internal successors, (2222), 22 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:51,551 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 101.0) internal successors, (2222), 22 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:51,551 INFO L175 Difference]: Start difference. First operand has 110 places, 101 transitions, 252 flow. Second operand 21 states and 1845 transitions. [2022-11-18 19:34:51,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 119 transitions, 418 flow [2022-11-18 19:34:51,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 119 transitions, 404 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-18 19:34:51,559 INFO L231 Difference]: Finished difference. Result has 134 places, 114 transitions, 376 flow [2022-11-18 19:34:51,560 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=376, PETRI_PLACES=134, PETRI_TRANSITIONS=114} [2022-11-18 19:34:51,562 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, 35 predicate places. [2022-11-18 19:34:51,562 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 114 transitions, 376 flow [2022-11-18 19:34:51,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 88.0) internal successors, (1584), 18 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:51,565 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:34:51,566 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:34:51,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8cdc5d2-a5eb-4e0b-ba15-551c25c50c0f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 19:34:51,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8cdc5d2-a5eb-4e0b-ba15-551c25c50c0f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:34:51,772 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:34:51,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:34:51,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1990750421, now seen corresponding path program 3 times [2022-11-18 19:34:51,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:34:51,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56112669] [2022-11-18 19:34:51,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:34:51,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:34:51,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:52,289 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:52,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:34:52,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56112669] [2022-11-18 19:34:52,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56112669] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:34:52,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537590862] [2022-11-18 19:34:52,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:34:52,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:34:52,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8cdc5d2-a5eb-4e0b-ba15-551c25c50c0f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:34:52,292 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8cdc5d2-a5eb-4e0b-ba15-551c25c50c0f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:34:52,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8cdc5d2-a5eb-4e0b-ba15-551c25c50c0f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 19:34:52,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-18 19:34:52,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:34:52,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 19:34:52,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:34:52,574 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:52,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:34:52,941 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:52,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537590862] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:34:52,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:34:52,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-18 19:34:52,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841198722] [2022-11-18 19:34:52,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:34:52,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-18 19:34:52,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:34:52,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-18 19:34:52,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 19:34:52,949 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 101 [2022-11-18 19:34:52,952 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 114 transitions, 376 flow. Second operand has 34 states, 34 states have (on average 88.0) internal successors, (2992), 34 states have internal predecessors, (2992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:52,952 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:34:52,953 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 101 [2022-11-18 19:34:52,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:34:53,695 INFO L130 PetriNetUnfolder]: 3/193 cut-off events. [2022-11-18 19:34:53,696 INFO L131 PetriNetUnfolder]: For 262/262 co-relation queries the response was YES. [2022-11-18 19:34:53,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 455 conditions, 193 events. 3/193 cut-off events. For 262/262 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 8/198 useless extension candidates. Maximal degree in co-relation 443. Up to 27 conditions per place. [2022-11-18 19:34:53,699 INFO L137 encePairwiseOnDemand]: 95/101 looper letters, 22 selfloop transitions, 45 changer transitions 0/151 dead transitions. [2022-11-18 19:34:53,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 151 transitions, 798 flow [2022-11-18 19:34:53,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-18 19:34:53,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-18 19:34:53,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3945 transitions. [2022-11-18 19:34:53,707 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8679867986798679 [2022-11-18 19:34:53,708 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3945 transitions. [2022-11-18 19:34:53,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3945 transitions. [2022-11-18 19:34:53,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:34:53,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3945 transitions. [2022-11-18 19:34:53,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 87.66666666666667) internal successors, (3945), 45 states have internal predecessors, (3945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:53,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 101.0) internal successors, (4646), 46 states have internal predecessors, (4646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:53,731 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 101.0) internal successors, (4646), 46 states have internal predecessors, (4646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:53,732 INFO L175 Difference]: Start difference. First operand has 134 places, 114 transitions, 376 flow. Second operand 45 states and 3945 transitions. [2022-11-18 19:34:53,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 151 transitions, 798 flow [2022-11-18 19:34:53,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 151 transitions, 758 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-18 19:34:53,740 INFO L231 Difference]: Finished difference. Result has 181 places, 139 transitions, 654 flow [2022-11-18 19:34:53,740 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=654, PETRI_PLACES=181, PETRI_TRANSITIONS=139} [2022-11-18 19:34:53,741 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, 82 predicate places. [2022-11-18 19:34:53,741 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 139 transitions, 654 flow [2022-11-18 19:34:53,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 88.0) internal successors, (2992), 34 states have internal predecessors, (2992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:53,743 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:34:53,743 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:34:53,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8cdc5d2-a5eb-4e0b-ba15-551c25c50c0f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 19:34:53,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8cdc5d2-a5eb-4e0b-ba15-551c25c50c0f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:34:53,950 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:34:53,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:34:53,950 INFO L85 PathProgramCache]: Analyzing trace with hash -522878805, now seen corresponding path program 4 times [2022-11-18 19:34:53,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:34:53,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130232664] [2022-11-18 19:34:53,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:34:53,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:34:54,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:55,226 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:55,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:34:55,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130232664] [2022-11-18 19:34:55,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130232664] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:34:55,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636679151] [2022-11-18 19:34:55,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 19:34:55,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:34:55,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8cdc5d2-a5eb-4e0b-ba15-551c25c50c0f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:34:55,228 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8cdc5d2-a5eb-4e0b-ba15-551c25c50c0f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:34:55,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8cdc5d2-a5eb-4e0b-ba15-551c25c50c0f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 19:34:55,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 19:34:55,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:34:55,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-18 19:34:55,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:34:55,642 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:55,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:34:56,594 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:56,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636679151] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:34:56,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:34:56,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 51 [2022-11-18 19:34:56,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322560858] [2022-11-18 19:34:56,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:34:56,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-18 19:34:56,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:34:56,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-18 19:34:56,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=1875, Unknown=0, NotChecked=0, Total=2550 [2022-11-18 19:34:56,608 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 101 [2022-11-18 19:34:56,613 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 139 transitions, 654 flow. Second operand has 51 states, 51 states have (on average 88.03921568627452) internal successors, (4490), 51 states have internal predecessors, (4490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:56,614 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:34:56,614 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 101 [2022-11-18 19:34:56,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:34:58,102 INFO L130 PetriNetUnfolder]: 3/256 cut-off events. [2022-11-18 19:34:58,102 INFO L131 PetriNetUnfolder]: For 1354/1354 co-relation queries the response was YES. [2022-11-18 19:34:58,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 769 conditions, 256 events. 3/256 cut-off events. For 1354/1354 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 54 event pairs, 0 based on Foata normal form. 9/262 useless extension candidates. Maximal degree in co-relation 748. Up to 44 conditions per place. [2022-11-18 19:34:58,107 INFO L137 encePairwiseOnDemand]: 95/101 looper letters, 31 selfloop transitions, 72 changer transitions 0/187 dead transitions. [2022-11-18 19:34:58,107 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 187 transitions, 1354 flow [2022-11-18 19:34:58,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-18 19:34:58,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2022-11-18 19:34:58,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 6304 transitions. [2022-11-18 19:34:58,119 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8668866886688669 [2022-11-18 19:34:58,119 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 6304 transitions. [2022-11-18 19:34:58,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 6304 transitions. [2022-11-18 19:34:58,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:34:58,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 6304 transitions. [2022-11-18 19:34:58,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 87.55555555555556) internal successors, (6304), 72 states have internal predecessors, (6304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:58,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 101.0) internal successors, (7373), 73 states have internal predecessors, (7373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:58,156 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 101.0) internal successors, (7373), 73 states have internal predecessors, (7373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:58,156 INFO L175 Difference]: Start difference. First operand has 181 places, 139 transitions, 654 flow. Second operand 72 states and 6304 transitions. [2022-11-18 19:34:58,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 187 transitions, 1354 flow [2022-11-18 19:34:58,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 187 transitions, 1280 flow, removed 19 selfloop flow, removed 18 redundant places. [2022-11-18 19:34:58,170 INFO L231 Difference]: Finished difference. Result has 244 places, 167 transitions, 1036 flow [2022-11-18 19:34:58,171 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=598, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=1036, PETRI_PLACES=244, PETRI_TRANSITIONS=167} [2022-11-18 19:34:58,173 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, 145 predicate places. [2022-11-18 19:34:58,173 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 167 transitions, 1036 flow [2022-11-18 19:34:58,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 88.03921568627452) internal successors, (4490), 51 states have internal predecessors, (4490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:58,191 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:34:58,191 INFO L209 CegarLoopForPetriNet]: trace histogram [24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:34:58,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8cdc5d2-a5eb-4e0b-ba15-551c25c50c0f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 19:34:58,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8cdc5d2-a5eb-4e0b-ba15-551c25c50c0f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:34:58,397 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:34:58,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:34:58,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1932937072, now seen corresponding path program 5 times [2022-11-18 19:34:58,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:34:58,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058654200] [2022-11-18 19:34:58,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:34:58,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:34:58,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:35:06,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1956 backedges. 0 proven. 1956 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:35:06,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:35:06,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058654200] [2022-11-18 19:35:06,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058654200] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:35:06,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435549740] [2022-11-18 19:35:06,039 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 19:35:06,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:35:06,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8cdc5d2-a5eb-4e0b-ba15-551c25c50c0f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:35:06,040 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8cdc5d2-a5eb-4e0b-ba15-551c25c50c0f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:35:06,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8cdc5d2-a5eb-4e0b-ba15-551c25c50c0f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 19:35:06,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2022-11-18 19:35:06,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:35:06,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-18 19:35:06,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:35:17,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1956 backedges. 1661 proven. 295 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:35:17,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:35:31,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1956 backedges. 0 proven. 1956 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:35:31,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435549740] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:35:31,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:35:31,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81, 81] total 235 [2022-11-18 19:35:31,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134046234] [2022-11-18 19:35:31,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:35:31,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 235 states [2022-11-18 19:35:31,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:35:31,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 235 interpolants. [2022-11-18 19:35:31,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3171, Invalid=51819, Unknown=0, NotChecked=0, Total=54990 [2022-11-18 19:35:31,968 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 101 [2022-11-18 19:35:31,983 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 167 transitions, 1036 flow. Second operand has 235 states, 235 states have (on average 70.15744680851064) internal successors, (16487), 235 states have internal predecessors, (16487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:35:31,984 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:35:31,984 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 101 [2022-11-18 19:35:31,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand