./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 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb9f4b-327d-4c80-b843-2a0806babb32/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb9f4b-327d-4c80-b843-2a0806babb32/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb9f4b-327d-4c80-b843-2a0806babb32/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb9f4b-327d-4c80-b843-2a0806babb32/bin/uautomizer-QkZJyEgLgS/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/fib_unsafe-11.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb9f4b-327d-4c80-b843-2a0806babb32/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb9f4b-327d-4c80-b843-2a0806babb32/bin/uautomizer-QkZJyEgLgS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 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-4e7fbc6 [2022-11-23 02:52:23,075 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 02:52:23,077 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 02:52:23,107 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 02:52:23,108 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 02:52:23,109 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 02:52:23,115 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 02:52:23,119 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 02:52:23,121 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 02:52:23,129 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 02:52:23,131 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 02:52:23,133 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 02:52:23,134 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 02:52:23,135 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 02:52:23,140 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 02:52:23,142 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 02:52:23,142 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 02:52:23,143 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 02:52:23,145 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 02:52:23,146 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 02:52:23,148 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 02:52:23,154 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 02:52:23,157 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 02:52:23,158 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 02:52:23,169 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 02:52:23,169 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 02:52:23,169 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 02:52:23,170 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 02:52:23,170 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 02:52:23,171 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 02:52:23,172 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 02:52:23,172 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 02:52:23,173 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 02:52:23,174 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 02:52:23,175 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 02:52:23,175 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 02:52:23,176 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 02:52:23,176 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 02:52:23,176 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 02:52:23,177 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 02:52:23,181 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 02:52:23,182 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb9f4b-327d-4c80-b843-2a0806babb32/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-23 02:52:23,209 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 02:52:23,209 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 02:52:23,209 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 02:52:23,210 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 02:52:23,210 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 02:52:23,210 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 02:52:23,211 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 02:52:23,211 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 02:52:23,211 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 02:52:23,212 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 02:52:23,212 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 02:52:23,212 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 02:52:23,212 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 02:52:23,212 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 02:52:23,213 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 02:52:23,213 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 02:52:23,213 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 02:52:23,213 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 02:52:23,213 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 02:52:23,213 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 02:52:23,214 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 02:52:23,214 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 02:52:23,214 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 02:52:23,214 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 02:52:23,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 02:52:23,215 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 02:52:23,215 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 02:52:23,215 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 02:52:23,215 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 02:52:23,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 02:52:23,216 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 02:52:23,216 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 02:52:23,216 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 02:52:23,216 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 02:52:23,216 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb9f4b-327d-4c80-b843-2a0806babb32/bin/uautomizer-QkZJyEgLgS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb9f4b-327d-4c80-b843-2a0806babb32/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7fcf270fc424e515c4f8db675612b386dd73dc1dc6be434bc2c22ad47252dc7 [2022-11-23 02:52:23,455 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 02:52:23,492 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 02:52:23,495 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 02:52:23,497 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 02:52:23,497 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 02:52:23,499 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb9f4b-327d-4c80-b843-2a0806babb32/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/pthread/fib_unsafe-11.i [2022-11-23 02:52:26,622 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 02:52:26,869 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 02:52:26,870 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb9f4b-327d-4c80-b843-2a0806babb32/sv-benchmarks/c/pthread/fib_unsafe-11.i [2022-11-23 02:52:26,882 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb9f4b-327d-4c80-b843-2a0806babb32/bin/uautomizer-QkZJyEgLgS/data/d285d41b6/7a22f62f29614745a110244b14f97126/FLAG49df94e49 [2022-11-23 02:52:26,907 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb9f4b-327d-4c80-b843-2a0806babb32/bin/uautomizer-QkZJyEgLgS/data/d285d41b6/7a22f62f29614745a110244b14f97126 [2022-11-23 02:52:26,910 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 02:52:26,912 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 02:52:26,915 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 02:52:26,915 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 02:52:26,919 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 02:52:26,922 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:52:26" (1/1) ... [2022-11-23 02:52:26,923 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@248cc11c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:26, skipping insertion in model container [2022-11-23 02:52:26,924 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:52:26" (1/1) ... [2022-11-23 02:52:26,932 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 02:52:26,964 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 02:52:27,318 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb9f4b-327d-4c80-b843-2a0806babb32/sv-benchmarks/c/pthread/fib_unsafe-11.i[30243,30256] [2022-11-23 02:52:27,353 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 02:52:27,364 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 02:52:27,420 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb9f4b-327d-4c80-b843-2a0806babb32/sv-benchmarks/c/pthread/fib_unsafe-11.i[30243,30256] [2022-11-23 02:52:27,427 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 02:52:27,464 INFO L208 MainTranslator]: Completed translation [2022-11-23 02:52:27,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:27 WrapperNode [2022-11-23 02:52:27,465 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 02:52:27,467 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 02:52:27,467 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 02:52:27,467 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 02:52:27,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:27" (1/1) ... [2022-11-23 02:52:27,509 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:27" (1/1) ... [2022-11-23 02:52:27,538 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2022-11-23 02:52:27,538 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 02:52:27,539 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 02:52:27,539 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 02:52:27,539 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 02:52:27,549 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:27" (1/1) ... [2022-11-23 02:52:27,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:27" (1/1) ... [2022-11-23 02:52:27,556 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:27" (1/1) ... [2022-11-23 02:52:27,557 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:27" (1/1) ... [2022-11-23 02:52:27,573 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:27" (1/1) ... [2022-11-23 02:52:27,578 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:27" (1/1) ... [2022-11-23 02:52:27,584 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:27" (1/1) ... [2022-11-23 02:52:27,587 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:27" (1/1) ... [2022-11-23 02:52:27,589 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 02:52:27,595 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 02:52:27,596 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 02:52:27,596 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 02:52:27,597 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:27" (1/1) ... [2022-11-23 02:52:27,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 02:52:27,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb9f4b-327d-4c80-b843-2a0806babb32/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:52:27,631 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb9f4b-327d-4c80-b843-2a0806babb32/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 02:52:27,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb9f4b-327d-4c80-b843-2a0806babb32/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 02:52:27,683 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-23 02:52:27,683 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-23 02:52:27,683 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-23 02:52:27,683 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-23 02:52:27,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 02:52:27,685 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-23 02:52:27,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 02:52:27,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 02:52:27,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 02:52:27,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 02:52:27,686 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-23 02:52:27,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 02:52:27,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 02:52:27,687 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 02:52:27,894 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 02:52:27,896 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 02:52:28,106 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 02:52:28,113 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 02:52:28,116 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-23 02:52:28,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:52:28 BoogieIcfgContainer [2022-11-23 02:52:28,120 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 02:52:28,123 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 02:52:28,123 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 02:52:28,126 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 02:52:28,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:52:26" (1/3) ... [2022-11-23 02:52:28,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77d190da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:52:28, skipping insertion in model container [2022-11-23 02:52:28,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:27" (2/3) ... [2022-11-23 02:52:28,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77d190da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:52:28, skipping insertion in model container [2022-11-23 02:52:28,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:52:28" (3/3) ... [2022-11-23 02:52:28,130 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-11.i [2022-11-23 02:52:28,164 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-23 02:52:28,171 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 02:52:28,172 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 02:52:28,172 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 02:52:28,237 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-23 02:52:28,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 101 transitions, 212 flow [2022-11-23 02:52:28,319 INFO L130 PetriNetUnfolder]: 7/99 cut-off events. [2022-11-23 02:52:28,319 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 02:52:28,325 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 70 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. [2022-11-23 02:52:28,325 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 101 transitions, 212 flow [2022-11-23 02:52:28,329 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 99 transitions, 204 flow [2022-11-23 02:52:28,333 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 02:52:28,347 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 99 transitions, 204 flow [2022-11-23 02:52:28,350 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 99 transitions, 204 flow [2022-11-23 02:52:28,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 99 transitions, 204 flow [2022-11-23 02:52:28,380 INFO L130 PetriNetUnfolder]: 7/99 cut-off events. [2022-11-23 02:52:28,380 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 02:52:28,381 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 70 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. [2022-11-23 02:52:28,388 INFO L119 LiptonReduction]: Number of co-enabled transitions 2134 [2022-11-23 02:52:32,204 INFO L134 LiptonReduction]: Checked pairs total: 1553 [2022-11-23 02:52:32,204 INFO L136 LiptonReduction]: Total number of compositions: 98 [2022-11-23 02:52:32,222 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 02:52:32,229 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;@13f6137a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 02:52:32,229 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-23 02:52:32,233 INFO L130 PetriNetUnfolder]: 3/12 cut-off events. [2022-11-23 02:52:32,233 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 02:52:32,233 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:52:32,234 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 02:52:32,235 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 02:52:32,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:52:32,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1613159743, now seen corresponding path program 1 times [2022-11-23 02:52:32,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:52:32,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074589737] [2022-11-23 02:52:32,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:52:32,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:52:32,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:52:32,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:52:32,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:52:32,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074589737] [2022-11-23 02:52:32,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074589737] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:52:32,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:52:32,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 02:52:32,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636437304] [2022-11-23 02:52:32,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:52:32,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:52:32,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:52:32,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:52:32,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:52:32,646 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 199 [2022-11-23 02:52:32,649 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 14 transitions, 34 flow. Second operand has 3 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) [2022-11-23 02:52:32,649 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:52:32,649 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 199 [2022-11-23 02:52:32,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:52:32,760 INFO L130 PetriNetUnfolder]: 97/149 cut-off events. [2022-11-23 02:52:32,761 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-23 02:52:32,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310 conditions, 149 events. 97/149 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 336 event pairs, 20 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 300. Up to 91 conditions per place. [2022-11-23 02:52:32,765 INFO L137 encePairwiseOnDemand]: 195/199 looper letters, 18 selfloop transitions, 2 changer transitions 1/21 dead transitions. [2022-11-23 02:52:32,765 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 21 transitions, 90 flow [2022-11-23 02:52:32,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:52:32,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 02:52:32,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 293 transitions. [2022-11-23 02:52:32,788 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.490787269681742 [2022-11-23 02:52:32,789 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 293 transitions. [2022-11-23 02:52:32,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 293 transitions. [2022-11-23 02:52:32,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:52:32,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 293 transitions. [2022-11-23 02:52:32,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:52:32,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 199.0) internal successors, (796), 4 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:52:32,816 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 199.0) internal successors, (796), 4 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:52:32,818 INFO L175 Difference]: Start difference. First operand has 18 places, 14 transitions, 34 flow. Second operand 3 states and 293 transitions. [2022-11-23 02:52:32,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 21 transitions, 90 flow [2022-11-23 02:52:32,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 02:52:32,823 INFO L231 Difference]: Finished difference. Result has 19 places, 14 transitions, 42 flow [2022-11-23 02:52:32,825 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=42, PETRI_PLACES=19, PETRI_TRANSITIONS=14} [2022-11-23 02:52:32,831 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 1 predicate places. [2022-11-23 02:52:32,831 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 14 transitions, 42 flow [2022-11-23 02:52:32,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2022-11-23 02:52:32,832 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:52:32,832 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:52:32,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 02:52:32,833 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 02:52:32,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:52:32,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1531655777, now seen corresponding path program 1 times [2022-11-23 02:52:32,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:52:32,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302642424] [2022-11-23 02:52:32,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:52:32,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:52:32,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:52:33,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:52:33,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:52:33,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302642424] [2022-11-23 02:52:33,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302642424] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:52:33,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373349801] [2022-11-23 02:52:33,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:52:33,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:52:33,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb9f4b-327d-4c80-b843-2a0806babb32/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:52:33,044 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb9f4b-327d-4c80-b843-2a0806babb32/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:52:33,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb9f4b-327d-4c80-b843-2a0806babb32/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 02:52:33,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:52:33,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 02:52:33,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:52:33,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:52:33,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:52:33,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:52:33,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373349801] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:52:33,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:52:33,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-23 02:52:33,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528975220] [2022-11-23 02:52:33,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:52:33,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 02:52:33,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:52:33,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 02:52:33,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-23 02:52:33,309 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 199 [2022-11-23 02:52:33,310 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 14 transitions, 42 flow. Second operand has 7 states, 7 states have (on average 90.71428571428571) internal successors, (635), 7 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:52:33,310 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:52:33,310 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 199 [2022-11-23 02:52:33,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:52:33,472 INFO L130 PetriNetUnfolder]: 133/203 cut-off events. [2022-11-23 02:52:33,473 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-23 02:52:33,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 482 conditions, 203 events. 133/203 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 452 event pairs, 20 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 471. Up to 64 conditions per place. [2022-11-23 02:52:33,479 INFO L137 encePairwiseOnDemand]: 196/199 looper letters, 36 selfloop transitions, 5 changer transitions 0/41 dead transitions. [2022-11-23 02:52:33,480 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 41 transitions, 184 flow [2022-11-23 02:52:33,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 02:52:33,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 02:52:33,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 578 transitions. [2022-11-23 02:52:33,484 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48408710217755446 [2022-11-23 02:52:33,485 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 578 transitions. [2022-11-23 02:52:33,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 578 transitions. [2022-11-23 02:52:33,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:52:33,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 578 transitions. [2022-11-23 02:52:33,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 96.33333333333333) internal successors, (578), 6 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:52:33,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 199.0) internal successors, (1393), 7 states have internal predecessors, (1393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:52:33,495 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 199.0) internal successors, (1393), 7 states have internal predecessors, (1393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:52:33,495 INFO L175 Difference]: Start difference. First operand has 19 places, 14 transitions, 42 flow. Second operand 6 states and 578 transitions. [2022-11-23 02:52:33,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 41 transitions, 184 flow [2022-11-23 02:52:33,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 41 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 02:52:33,498 INFO L231 Difference]: Finished difference. Result has 25 places, 17 transitions, 76 flow [2022-11-23 02:52:33,499 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=76, PETRI_PLACES=25, PETRI_TRANSITIONS=17} [2022-11-23 02:52:33,500 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 7 predicate places. [2022-11-23 02:52:33,500 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 17 transitions, 76 flow [2022-11-23 02:52:33,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.71428571428571) internal successors, (635), 7 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:52:33,501 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:52:33,501 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-11-23 02:52:33,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb9f4b-327d-4c80-b843-2a0806babb32/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-23 02:52:33,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb9f4b-327d-4c80-b843-2a0806babb32/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:52:33,708 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 02:52:33,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:52:33,708 INFO L85 PathProgramCache]: Analyzing trace with hash -175043903, now seen corresponding path program 2 times [2022-11-23 02:52:33,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:52:33,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769700850] [2022-11-23 02:52:33,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:52:33,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:52:33,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:52:33,879 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:52:33,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:52:33,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769700850] [2022-11-23 02:52:33,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769700850] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:52:33,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590931160] [2022-11-23 02:52:33,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:52:33,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:52:33,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb9f4b-327d-4c80-b843-2a0806babb32/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:52:33,882 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb9f4b-327d-4c80-b843-2a0806babb32/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:52:33,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb9f4b-327d-4c80-b843-2a0806babb32/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 02:52:33,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:52:33,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:52:33,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 02:52:33,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:52:34,003 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:52:34,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:52:34,077 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:52:34,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590931160] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:52:34,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:52:34,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-23 02:52:34,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248799322] [2022-11-23 02:52:34,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:52:34,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 02:52:34,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:52:34,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 02:52:34,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-23 02:52:34,115 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 199 [2022-11-23 02:52:34,118 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 17 transitions, 76 flow. Second operand has 13 states, 13 states have (on average 90.38461538461539) internal successors, (1175), 13 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:52:34,118 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:52:34,118 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 199 [2022-11-23 02:52:34,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:52:34,301 INFO L130 PetriNetUnfolder]: 241/365 cut-off events. [2022-11-23 02:52:34,301 INFO L131 PetriNetUnfolder]: For 216/216 co-relation queries the response was YES. [2022-11-23 02:52:34,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1008 conditions, 365 events. 241/365 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 847 event pairs, 20 based on Foata normal form. 54/339 useless extension candidates. Maximal degree in co-relation 993. Up to 109 conditions per place. [2022-11-23 02:52:34,304 INFO L137 encePairwiseOnDemand]: 196/199 looper letters, 72 selfloop transitions, 11 changer transitions 0/83 dead transitions. [2022-11-23 02:52:34,304 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 83 transitions, 398 flow [2022-11-23 02:52:34,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 02:52:34,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-23 02:52:34,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1157 transitions. [2022-11-23 02:52:34,308 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48450586264656614 [2022-11-23 02:52:34,308 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1157 transitions. [2022-11-23 02:52:34,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1157 transitions. [2022-11-23 02:52:34,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:52:34,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1157 transitions. [2022-11-23 02:52:34,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 96.41666666666667) internal successors, (1157), 12 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:52:34,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 199.0) internal successors, (2587), 13 states have internal predecessors, (2587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:52:34,319 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 199.0) internal successors, (2587), 13 states have internal predecessors, (2587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:52:34,319 INFO L175 Difference]: Start difference. First operand has 25 places, 17 transitions, 76 flow. Second operand 12 states and 1157 transitions. [2022-11-23 02:52:34,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 83 transitions, 398 flow [2022-11-23 02:52:34,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 83 transitions, 384 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-23 02:52:34,323 INFO L231 Difference]: Finished difference. Result has 41 places, 23 transitions, 146 flow [2022-11-23 02:52:34,323 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=146, PETRI_PLACES=41, PETRI_TRANSITIONS=23} [2022-11-23 02:52:34,324 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 23 predicate places. [2022-11-23 02:52:34,324 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 23 transitions, 146 flow [2022-11-23 02:52:34,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 90.38461538461539) internal successors, (1175), 13 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:52:34,326 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:52:34,326 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-11-23 02:52:34,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb9f4b-327d-4c80-b843-2a0806babb32/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 02:52:34,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb9f4b-327d-4c80-b843-2a0806babb32/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:52:34,532 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 02:52:34,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:52:34,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1805870785, now seen corresponding path program 3 times [2022-11-23 02:52:34,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:52:34,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299550855] [2022-11-23 02:52:34,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:52:34,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:52:34,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:52:34,832 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:52:34,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:52:34,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299550855] [2022-11-23 02:52:34,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299550855] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:52:34,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108139158] [2022-11-23 02:52:34,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 02:52:34,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:52:34,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb9f4b-327d-4c80-b843-2a0806babb32/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:52:34,834 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb9f4b-327d-4c80-b843-2a0806babb32/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:52:34,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb9f4b-327d-4c80-b843-2a0806babb32/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 02:52:34,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-23 02:52:34,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:52:34,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 02:52:34,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:52:34,980 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:52:34,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:52:35,239 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:52:35,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108139158] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:52:35,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:52:35,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-23 02:52:35,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144593790] [2022-11-23 02:52:35,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:52:35,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 02:52:35,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:52:35,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 02:52:35,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-23 02:52:35,310 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 199 [2022-11-23 02:52:35,315 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 23 transitions, 146 flow. Second operand has 25 states, 25 states have (on average 90.2) internal successors, (2255), 25 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:52:35,315 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:52:35,315 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 199 [2022-11-23 02:52:35,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:52:35,704 INFO L130 PetriNetUnfolder]: 457/689 cut-off events. [2022-11-23 02:52:35,704 INFO L131 PetriNetUnfolder]: For 4212/4212 co-relation queries the response was YES. [2022-11-23 02:52:35,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2140 conditions, 689 events. 457/689 cut-off events. For 4212/4212 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1645 event pairs, 20 based on Foata normal form. 108/645 useless extension candidates. Maximal degree in co-relation 2118. Up to 190 conditions per place. [2022-11-23 02:52:35,711 INFO L137 encePairwiseOnDemand]: 196/199 looper letters, 144 selfloop transitions, 23 changer transitions 0/167 dead transitions. [2022-11-23 02:52:35,711 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 167 transitions, 840 flow [2022-11-23 02:52:35,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-23 02:52:35,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-23 02:52:35,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2315 transitions. [2022-11-23 02:52:35,718 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48471524288107204 [2022-11-23 02:52:35,718 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2315 transitions. [2022-11-23 02:52:35,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2315 transitions. [2022-11-23 02:52:35,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:52:35,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2315 transitions. [2022-11-23 02:52:35,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 96.45833333333333) internal successors, (2315), 24 states have internal predecessors, (2315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:52:35,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 199.0) internal successors, (4975), 25 states have internal predecessors, (4975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:52:35,736 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 199.0) internal successors, (4975), 25 states have internal predecessors, (4975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:52:35,736 INFO L175 Difference]: Start difference. First operand has 41 places, 23 transitions, 146 flow. Second operand 24 states and 2315 transitions. [2022-11-23 02:52:35,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 167 transitions, 840 flow [2022-11-23 02:52:35,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 167 transitions, 768 flow, removed 31 selfloop flow, removed 5 redundant places. [2022-11-23 02:52:35,748 INFO L231 Difference]: Finished difference. Result has 71 places, 35 transitions, 266 flow [2022-11-23 02:52:35,749 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=266, PETRI_PLACES=71, PETRI_TRANSITIONS=35} [2022-11-23 02:52:35,750 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 53 predicate places. [2022-11-23 02:52:35,751 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 35 transitions, 266 flow [2022-11-23 02:52:35,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 90.2) internal successors, (2255), 25 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:52:35,753 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:52:35,754 INFO L209 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2022-11-23 02:52:35,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb9f4b-327d-4c80-b843-2a0806babb32/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 02:52:35,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb9f4b-327d-4c80-b843-2a0806babb32/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:52:35,960 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 02:52:35,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:52:35,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1256791745, now seen corresponding path program 4 times [2022-11-23 02:52:35,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:52:35,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469098650] [2022-11-23 02:52:35,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:52:35,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:52:35,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:52:36,544 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:52:36,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:52:36,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469098650] [2022-11-23 02:52:36,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469098650] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:52:36,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877746979] [2022-11-23 02:52:36,545 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 02:52:36,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:52:36,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb9f4b-327d-4c80-b843-2a0806babb32/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:52:36,550 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb9f4b-327d-4c80-b843-2a0806babb32/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:52:36,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb9f4b-327d-4c80-b843-2a0806babb32/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 02:52:36,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 02:52:36,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:52:36,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 02:52:36,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:52:36,762 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:52:36,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:52:37,211 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:52:37,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877746979] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:52:37,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:52:37,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 26 [2022-11-23 02:52:37,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033561102] [2022-11-23 02:52:37,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:52:37,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-23 02:52:37,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:52:37,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-23 02:52:37,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-11-23 02:52:37,263 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 199 [2022-11-23 02:52:37,266 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 35 transitions, 266 flow. Second operand has 27 states, 27 states have (on average 90.22222222222223) internal successors, (2436), 27 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:52:37,266 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:52:37,266 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 199 [2022-11-23 02:52:37,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:52:37,695 INFO L130 PetriNetUnfolder]: 493/743 cut-off events. [2022-11-23 02:52:37,695 INFO L131 PetriNetUnfolder]: For 5562/5562 co-relation queries the response was YES. [2022-11-23 02:52:37,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2422 conditions, 743 events. 493/743 cut-off events. For 5562/5562 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1775 event pairs, 20 based on Foata normal form. 18/597 useless extension candidates. Maximal degree in co-relation 2388. Up to 166 conditions per place. [2022-11-23 02:52:37,703 INFO L137 encePairwiseOnDemand]: 196/199 looper letters, 156 selfloop transitions, 25 changer transitions 0/181 dead transitions. [2022-11-23 02:52:37,704 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 181 transitions, 932 flow [2022-11-23 02:52:37,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-23 02:52:37,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-23 02:52:37,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2497 transitions. [2022-11-23 02:52:37,711 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48260533436412834 [2022-11-23 02:52:37,711 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2497 transitions. [2022-11-23 02:52:37,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2497 transitions. [2022-11-23 02:52:37,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:52:37,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2497 transitions. [2022-11-23 02:52:37,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 96.03846153846153) internal successors, (2497), 26 states have internal predecessors, (2497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:52:37,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 199.0) internal successors, (5373), 27 states have internal predecessors, (5373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:52:37,729 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 199.0) internal successors, (5373), 27 states have internal predecessors, (5373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:52:37,729 INFO L175 Difference]: Start difference. First operand has 71 places, 35 transitions, 266 flow. Second operand 26 states and 2497 transitions. [2022-11-23 02:52:37,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 181 transitions, 932 flow [2022-11-23 02:52:37,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 181 transitions, 832 flow, removed 39 selfloop flow, removed 11 redundant places. [2022-11-23 02:52:37,788 INFO L231 Difference]: Finished difference. Result has 87 places, 37 transitions, 242 flow [2022-11-23 02:52:37,789 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=242, PETRI_PLACES=87, PETRI_TRANSITIONS=37} [2022-11-23 02:52:37,791 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 69 predicate places. [2022-11-23 02:52:37,792 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 37 transitions, 242 flow [2022-11-23 02:52:37,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 90.22222222222223) internal successors, (2436), 27 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:52:37,793 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:52:37,793 INFO L209 CegarLoopForPetriNet]: trace histogram [24, 1, 1, 1, 1, 1, 1] [2022-11-23 02:52:37,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb9f4b-327d-4c80-b843-2a0806babb32/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 02:52:38,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb9f4b-327d-4c80-b843-2a0806babb32/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:52:38,000 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 02:52:38,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:52:38,001 INFO L85 PathProgramCache]: Analyzing trace with hash 891065025, now seen corresponding path program 5 times [2022-11-23 02:52:38,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:52:38,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477497918] [2022-11-23 02:52:38,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:52:38,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:52:38,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:52:40,213 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:52:40,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:52:40,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477497918] [2022-11-23 02:52:40,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477497918] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:52:40,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371806310] [2022-11-23 02:52:40,214 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 02:52:40,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:52:40,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb9f4b-327d-4c80-b843-2a0806babb32/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:52:40,230 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb9f4b-327d-4c80-b843-2a0806babb32/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:52:40,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb9f4b-327d-4c80-b843-2a0806babb32/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 02:52:40,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-11-23 02:52:40,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:52:40,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-23 02:52:40,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:52:42,079 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 253 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:52:42,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:52:44,096 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:52:44,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371806310] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:52:44,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:52:44,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 75 [2022-11-23 02:52:44,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329185321] [2022-11-23 02:52:44,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:52:44,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-11-23 02:52:44,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:52:44,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-11-23 02:52:44,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1057, Invalid=4795, Unknown=0, NotChecked=0, Total=5852 [2022-11-23 02:52:46,801 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 199 [2022-11-23 02:52:46,808 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 37 transitions, 242 flow. Second operand has 77 states, 77 states have (on average 85.16883116883118) internal successors, (6558), 77 states have internal predecessors, (6558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:52:46,809 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:52:46,809 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 199 [2022-11-23 02:52:46,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:54:10,388 INFO L130 PetriNetUnfolder]: 88123/132204 cut-off events. [2022-11-23 02:54:10,388 INFO L131 PetriNetUnfolder]: For 744360/744360 co-relation queries the response was YES. [2022-11-23 02:54:11,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 415878 conditions, 132204 events. 88123/132204 cut-off events. For 744360/744360 co-relation queries the response was YES. Maximal size of possible extension queue 2533. Compared 988755 event pairs, 102 based on Foata normal form. 209/99387 useless extension candidates. Maximal degree in co-relation 415842. Up to 27554 conditions per place. [2022-11-23 02:54:11,814 INFO L137 encePairwiseOnDemand]: 194/199 looper letters, 1759 selfloop transitions, 5877 changer transitions 0/7636 dead transitions. [2022-11-23 02:54:11,814 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 7636 transitions, 68095 flow [2022-11-23 02:54:11,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 352 states. [2022-11-23 02:54:11,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2022-11-23 02:54:11,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 32381 transitions. [2022-11-23 02:54:11,883 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4622687300137049 [2022-11-23 02:54:11,883 INFO L72 ComplementDD]: Start complementDD. Operand 352 states and 32381 transitions. [2022-11-23 02:54:11,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 352 states and 32381 transitions. [2022-11-23 02:54:11,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:54:11,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 352 states and 32381 transitions. [2022-11-23 02:54:11,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 353 states, 352 states have (on average 91.99147727272727) internal successors, (32381), 352 states have internal predecessors, (32381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:54:12,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 353 states, 353 states have (on average 199.0) internal successors, (70247), 353 states have internal predecessors, (70247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:54:12,096 INFO L81 ComplementDD]: Finished complementDD. Result has 353 states, 353 states have (on average 199.0) internal successors, (70247), 353 states have internal predecessors, (70247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:54:12,097 INFO L175 Difference]: Start difference. First operand has 87 places, 37 transitions, 242 flow. Second operand 352 states and 32381 transitions. [2022-11-23 02:54:12,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 7636 transitions, 68095 flow [2022-11-23 02:54:27,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 7636 transitions, 55189 flow, removed 2193 selfloop flow, removed 23 redundant places. [2022-11-23 02:54:27,328 INFO L231 Difference]: Finished difference. Result has 443 places, 5914 transitions, 35639 flow [2022-11-23 02:54:27,329 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=352, PETRI_FLOW=35639, PETRI_PLACES=443, PETRI_TRANSITIONS=5914} [2022-11-23 02:54:27,330 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 425 predicate places. [2022-11-23 02:54:27,330 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 5914 transitions, 35639 flow [2022-11-23 02:54:27,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 85.16883116883118) internal successors, (6558), 77 states have internal predecessors, (6558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:54:27,332 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:54:27,332 INFO L209 CegarLoopForPetriNet]: trace histogram [24, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:54:27,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb9f4b-327d-4c80-b843-2a0806babb32/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 02:54:27,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb9f4b-327d-4c80-b843-2a0806babb32/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:54:27,539 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 02:54:27,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:54:27,539 INFO L85 PathProgramCache]: Analyzing trace with hash -453073198, now seen corresponding path program 1 times [2022-11-23 02:54:27,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:54:27,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563538160] [2022-11-23 02:54:27,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:54:27,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:54:27,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:54:29,525 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:54:29,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:54:29,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563538160] [2022-11-23 02:54:29,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563538160] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:54:29,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750172568] [2022-11-23 02:54:29,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:54:29,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:54:29,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb9f4b-327d-4c80-b843-2a0806babb32/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:54:29,532 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb9f4b-327d-4c80-b843-2a0806babb32/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:54:29,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb9f4b-327d-4c80-b843-2a0806babb32/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 02:54:29,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:54:29,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-23 02:54:29,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:54:31,405 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 211 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:54:31,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:54:33,702 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:54:33,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750172568] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:54:33,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:54:33,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 81 [2022-11-23 02:54:33,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680064846] [2022-11-23 02:54:33,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:54:33,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-11-23 02:54:33,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:54:33,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-11-23 02:54:33,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1107, Invalid=5699, Unknown=0, NotChecked=0, Total=6806 [2022-11-23 02:54:36,537 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 199 [2022-11-23 02:54:36,543 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 5914 transitions, 35639 flow. Second operand has 83 states, 83 states have (on average 85.19277108433735) internal successors, (7071), 83 states have internal predecessors, (7071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:54:36,543 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:54:36,543 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 199 [2022-11-23 02:54:36,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand