./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-nondet/nondet-loop-bound-variant-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_f91509b1-4815-4b5b-9368-5b86560ebcab/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f91509b1-4815-4b5b-9368-5b86560ebcab/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f91509b1-4815-4b5b-9368-5b86560ebcab/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f91509b1-4815-4b5b-9368-5b86560ebcab/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-nondet/nondet-loop-bound-variant-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f91509b1-4815-4b5b-9368-5b86560ebcab/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f91509b1-4815-4b5b-9368-5b86560ebcab/bin/uautomizer-Dbtcem3rbc --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 645ee85d2a671dd1acf511bbf13e9e3bda7e0b5cc29e8abc16fb4ed3af500077 --- 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-5e519f3 [2022-11-02 20:52:47,919 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:52:47,922 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:52:47,956 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:52:47,956 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:52:47,957 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:52:47,959 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:52:47,960 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:52:47,962 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:52:47,963 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:52:47,964 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:52:47,965 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:52:47,966 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:52:47,967 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:52:47,968 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:52:47,969 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:52:47,970 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:52:47,971 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:52:47,973 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:52:47,980 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:52:47,981 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:52:47,989 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:52:47,990 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:52:47,991 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:52:47,995 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:52:47,995 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:52:47,995 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:52:47,996 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:52:47,997 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:52:47,998 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:52:47,998 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:52:47,999 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:52:48,000 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:52:48,001 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:52:48,010 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:52:48,011 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:52:48,012 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:52:48,012 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:52:48,012 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:52:48,013 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:52:48,014 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:52:48,016 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f91509b1-4815-4b5b-9368-5b86560ebcab/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:52:48,053 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:52:48,054 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:52:48,054 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:52:48,054 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:52:48,055 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:52:48,055 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:52:48,056 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:52:48,056 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:52:48,056 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:52:48,056 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:52:48,056 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:52:48,056 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:52:48,057 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:52:48,057 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:52:48,057 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:52:48,057 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:52:48,057 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:52:48,066 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:52:48,067 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:52:48,067 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:52:48,067 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:52:48,067 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:52:48,068 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:52:48,068 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:52:48,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:52:48,068 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:52:48,069 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:52:48,069 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:52:48,070 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:52:48,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:52:48,070 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:52:48,070 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:52:48,071 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:52:48,071 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f91509b1-4815-4b5b-9368-5b86560ebcab/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f91509b1-4815-4b5b-9368-5b86560ebcab/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 645ee85d2a671dd1acf511bbf13e9e3bda7e0b5cc29e8abc16fb4ed3af500077 [2022-11-02 20:52:48,392 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:52:48,426 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:52:48,429 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:52:48,430 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:52:48,432 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:52:48,433 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f91509b1-4815-4b5b-9368-5b86560ebcab/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/pthread-nondet/nondet-loop-bound-variant-1.i [2022-11-02 20:52:48,516 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f91509b1-4815-4b5b-9368-5b86560ebcab/bin/uautomizer-Dbtcem3rbc/data/a197c79a9/56def9215daa4c3cbcf219cff0146b0c/FLAG29caa10db [2022-11-02 20:52:49,138 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:52:49,139 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f91509b1-4815-4b5b-9368-5b86560ebcab/sv-benchmarks/c/pthread-nondet/nondet-loop-bound-variant-1.i [2022-11-02 20:52:49,154 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f91509b1-4815-4b5b-9368-5b86560ebcab/bin/uautomizer-Dbtcem3rbc/data/a197c79a9/56def9215daa4c3cbcf219cff0146b0c/FLAG29caa10db [2022-11-02 20:52:49,523 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f91509b1-4815-4b5b-9368-5b86560ebcab/bin/uautomizer-Dbtcem3rbc/data/a197c79a9/56def9215daa4c3cbcf219cff0146b0c [2022-11-02 20:52:49,526 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:52:49,528 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:52:49,529 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:52:49,530 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:52:49,533 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:52:49,533 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:52:49" (1/1) ... [2022-11-02 20:52:49,534 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d4de90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:49, skipping insertion in model container [2022-11-02 20:52:49,535 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:52:49" (1/1) ... [2022-11-02 20:52:49,542 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:52:49,583 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:52:49,957 WARN L230 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_f91509b1-4815-4b5b-9368-5b86560ebcab/sv-benchmarks/c/pthread-nondet/nondet-loop-bound-variant-1.i[30035,30048] [2022-11-02 20:52:49,985 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:52:49,997 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:52:50,057 WARN L230 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_f91509b1-4815-4b5b-9368-5b86560ebcab/sv-benchmarks/c/pthread-nondet/nondet-loop-bound-variant-1.i[30035,30048] [2022-11-02 20:52:50,073 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:52:50,107 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:52:50,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:50 WrapperNode [2022-11-02 20:52:50,108 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:52:50,109 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:52:50,109 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:52:50,109 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:52:50,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:50" (1/1) ... [2022-11-02 20:52:50,153 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:50" (1/1) ... [2022-11-02 20:52:50,187 INFO L138 Inliner]: procedures = 171, calls = 26, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 80 [2022-11-02 20:52:50,188 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:52:50,189 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:52:50,189 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:52:50,189 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:52:50,199 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:50" (1/1) ... [2022-11-02 20:52:50,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:50" (1/1) ... [2022-11-02 20:52:50,214 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:50" (1/1) ... [2022-11-02 20:52:50,215 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:50" (1/1) ... [2022-11-02 20:52:50,219 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:50" (1/1) ... [2022-11-02 20:52:50,224 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:50" (1/1) ... [2022-11-02 20:52:50,226 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:50" (1/1) ... [2022-11-02 20:52:50,227 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:50" (1/1) ... [2022-11-02 20:52:50,230 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:52:50,230 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:52:50,231 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:52:50,231 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:52:50,232 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:50" (1/1) ... [2022-11-02 20:52:50,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:52:50,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f91509b1-4815-4b5b-9368-5b86560ebcab/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:52:50,266 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f91509b1-4815-4b5b-9368-5b86560ebcab/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:52:50,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f91509b1-4815-4b5b-9368-5b86560ebcab/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:52:50,309 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2022-11-02 20:52:50,309 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2022-11-02 20:52:50,309 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-02 20:52:50,310 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-02 20:52:50,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:52:50,310 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-02 20:52:50,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:52:50,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:52:50,313 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:52:50,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:52:50,313 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:52:50,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:52:50,316 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-02 20:52:50,571 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:52:50,574 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:52:50,775 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:52:50,783 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:52:50,783 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-02 20:52:50,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:52:50 BoogieIcfgContainer [2022-11-02 20:52:50,786 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:52:50,788 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:52:50,789 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:52:50,792 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:52:50,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:52:49" (1/3) ... [2022-11-02 20:52:50,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@465d613e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:52:50, skipping insertion in model container [2022-11-02 20:52:50,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:50" (2/3) ... [2022-11-02 20:52:50,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@465d613e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:52:50, skipping insertion in model container [2022-11-02 20:52:50,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:52:50" (3/3) ... [2022-11-02 20:52:50,796 INFO L112 eAbstractionObserver]: Analyzing ICFG nondet-loop-bound-variant-1.i [2022-11-02 20:52:50,805 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-02 20:52:50,817 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:52:50,817 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:52:50,817 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-02 20:52:50,917 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:52:50,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 98 transitions, 206 flow [2022-11-02 20:52:51,061 INFO L130 PetriNetUnfolder]: 6/111 cut-off events. [2022-11-02 20:52:51,062 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:52:51,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 111 events. 6/111 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 131 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 73. Up to 4 conditions per place. [2022-11-02 20:52:51,067 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 98 transitions, 206 flow [2022-11-02 20:52:51,073 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 98 places, 97 transitions, 202 flow [2022-11-02 20:52:51,096 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:52:51,105 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;@1f2e95ec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:52:51,106 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-02 20:52:51,140 INFO L130 PetriNetUnfolder]: 3/60 cut-off events. [2022-11-02 20:52:51,141 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:52:51,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:52:51,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:52:51,142 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 20:52:51,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:51,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1012560353, now seen corresponding path program 1 times [2022-11-02 20:52:51,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:51,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875435564] [2022-11-02 20:52:51,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:51,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:51,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:51,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:51,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:52:52,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875435564] [2022-11-02 20:52:52,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875435564] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:52:52,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:52:52,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 20:52:52,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435173173] [2022-11-02 20:52:52,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:52:52,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:52:52,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:52:52,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:52:52,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:52:52,072 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 98 [2022-11-02 20:52:52,076 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 97 transitions, 202 flow. Second operand has 8 states, 8 states have (on average 72.625) internal successors, (581), 8 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:52,076 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:52:52,077 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 98 [2022-11-02 20:52:52,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:52:52,403 INFO L130 PetriNetUnfolder]: 115/510 cut-off events. [2022-11-02 20:52:52,403 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-02 20:52:52,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 761 conditions, 510 events. 115/510 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2973 event pairs, 32 based on Foata normal form. 8/448 useless extension candidates. Maximal degree in co-relation 705. Up to 70 conditions per place. [2022-11-02 20:52:52,416 INFO L137 encePairwiseOnDemand]: 85/98 looper letters, 34 selfloop transitions, 11 changer transitions 6/121 dead transitions. [2022-11-02 20:52:52,417 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 121 transitions, 358 flow [2022-11-02 20:52:52,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:52:52,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-02 20:52:52,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 846 transitions. [2022-11-02 20:52:52,443 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7847866419294991 [2022-11-02 20:52:52,444 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 846 transitions. [2022-11-02 20:52:52,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 846 transitions. [2022-11-02 20:52:52,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:52:52,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 846 transitions. [2022-11-02 20:52:52,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 76.9090909090909) internal successors, (846), 11 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:52,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 98.0) internal successors, (1176), 12 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:52,474 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 98.0) internal successors, (1176), 12 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:52,476 INFO L175 Difference]: Start difference. First operand has 98 places, 97 transitions, 202 flow. Second operand 11 states and 846 transitions. [2022-11-02 20:52:52,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 121 transitions, 358 flow [2022-11-02 20:52:52,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 121 transitions, 357 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:52:52,490 INFO L231 Difference]: Finished difference. Result has 110 places, 97 transitions, 243 flow [2022-11-02 20:52:52,492 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=98, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=243, PETRI_PLACES=110, PETRI_TRANSITIONS=97} [2022-11-02 20:52:52,496 INFO L287 CegarLoopForPetriNet]: 98 programPoint places, 12 predicate places. [2022-11-02 20:52:52,497 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 97 transitions, 243 flow [2022-11-02 20:52:52,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 72.625) internal successors, (581), 8 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:52,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:52:52,498 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:52:52,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:52:52,499 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 20:52:52,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:52,500 INFO L85 PathProgramCache]: Analyzing trace with hash -271182080, now seen corresponding path program 1 times [2022-11-02 20:52:52,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:52,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399846928] [2022-11-02 20:52:52,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:52,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:52,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:52:52,567 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:52:52,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:52:52,623 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:52:52,624 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:52:52,626 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-02 20:52:52,628 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-02 20:52:52,628 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-11-02 20:52:52,630 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-02 20:52:52,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:52:52,634 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-02 20:52:52,638 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:52:52,638 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-02 20:52:52,692 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:52:52,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 132 transitions, 288 flow [2022-11-02 20:52:52,738 INFO L130 PetriNetUnfolder]: 9/151 cut-off events. [2022-11-02 20:52:52,739 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-02 20:52:52,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 151 events. 9/151 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 239 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 160. Up to 6 conditions per place. [2022-11-02 20:52:52,743 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 132 transitions, 288 flow [2022-11-02 20:52:52,750 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 119 places, 118 transitions, 251 flow [2022-11-02 20:52:52,752 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:52:52,754 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;@1f2e95ec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:52:52,754 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-02 20:52:52,770 INFO L130 PetriNetUnfolder]: 2/59 cut-off events. [2022-11-02 20:52:52,770 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:52:52,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:52:52,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:52:52,771 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:52:52,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:52,773 INFO L85 PathProgramCache]: Analyzing trace with hash -2078155084, now seen corresponding path program 1 times [2022-11-02 20:52:52,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:52,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763286025] [2022-11-02 20:52:52,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:52,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:52,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:53,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:53,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:52:53,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763286025] [2022-11-02 20:52:53,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763286025] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:52:53,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:52:53,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 20:52:53,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918602616] [2022-11-02 20:52:53,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:52:53,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:52:53,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:52:53,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:52:53,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:52:53,201 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 132 [2022-11-02 20:52:53,203 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 118 transitions, 251 flow. Second operand has 8 states, 8 states have (on average 96.625) internal successors, (773), 8 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:53,203 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:52:53,203 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 132 [2022-11-02 20:52:53,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:52:53,851 INFO L130 PetriNetUnfolder]: 1075/2277 cut-off events. [2022-11-02 20:52:53,852 INFO L131 PetriNetUnfolder]: For 100/100 co-relation queries the response was YES. [2022-11-02 20:52:53,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4031 conditions, 2277 events. 1075/2277 cut-off events. For 100/100 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 17095 event pairs, 174 based on Foata normal form. 186/1978 useless extension candidates. Maximal degree in co-relation 3974. Up to 382 conditions per place. [2022-11-02 20:52:53,873 INFO L137 encePairwiseOnDemand]: 117/132 looper letters, 82 selfloop transitions, 14 changer transitions 6/187 dead transitions. [2022-11-02 20:52:53,873 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 187 transitions, 629 flow [2022-11-02 20:52:53,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:52:53,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-02 20:52:53,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1172 transitions. [2022-11-02 20:52:53,877 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8071625344352618 [2022-11-02 20:52:53,877 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1172 transitions. [2022-11-02 20:52:53,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1172 transitions. [2022-11-02 20:52:53,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:52:53,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1172 transitions. [2022-11-02 20:52:53,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 106.54545454545455) internal successors, (1172), 11 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:53,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 132.0) internal successors, (1584), 12 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:53,885 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 132.0) internal successors, (1584), 12 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:53,886 INFO L175 Difference]: Start difference. First operand has 119 places, 118 transitions, 251 flow. Second operand 11 states and 1172 transitions. [2022-11-02 20:52:53,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 187 transitions, 629 flow [2022-11-02 20:52:53,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 187 transitions, 626 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-02 20:52:53,894 INFO L231 Difference]: Finished difference. Result has 132 places, 121 transitions, 322 flow [2022-11-02 20:52:53,894 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=322, PETRI_PLACES=132, PETRI_TRANSITIONS=121} [2022-11-02 20:52:53,895 INFO L287 CegarLoopForPetriNet]: 119 programPoint places, 13 predicate places. [2022-11-02 20:52:53,895 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 121 transitions, 322 flow [2022-11-02 20:52:53,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 96.625) internal successors, (773), 8 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:53,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:52:53,897 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:52:53,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:52:53,898 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:52:53,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:53,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1597974071, now seen corresponding path program 1 times [2022-11-02 20:52:53,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:53,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725589583] [2022-11-02 20:52:53,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:53,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:53,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:52:53,952 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:52:53,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:52:54,010 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:52:54,011 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:52:54,012 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-02 20:52:54,012 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-02 20:52:54,012 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2022-11-02 20:52:54,013 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-02 20:52:54,013 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-02 20:52:54,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 20:52:54,013 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-02 20:52:54,014 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:52:54,014 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-02 20:52:54,063 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:52:54,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 169 places, 166 transitions, 374 flow [2022-11-02 20:52:54,092 INFO L130 PetriNetUnfolder]: 12/191 cut-off events. [2022-11-02 20:52:54,092 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-02 20:52:54,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212 conditions, 191 events. 12/191 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 345 event pairs, 0 based on Foata normal form. 0/174 useless extension candidates. Maximal degree in co-relation 205. Up to 8 conditions per place. [2022-11-02 20:52:54,095 INFO L82 GeneralOperation]: Start removeDead. Operand has 169 places, 166 transitions, 374 flow [2022-11-02 20:52:54,096 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 140 places, 139 transitions, 302 flow [2022-11-02 20:52:54,098 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:52:54,099 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;@1f2e95ec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:52:54,099 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-02 20:52:54,105 INFO L130 PetriNetUnfolder]: 2/59 cut-off events. [2022-11-02 20:52:54,106 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:52:54,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:52:54,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:52:54,106 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-02 20:52:54,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:54,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1770621139, now seen corresponding path program 1 times [2022-11-02 20:52:54,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:54,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46822596] [2022-11-02 20:52:54,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:54,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:54,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:54,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:54,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:52:54,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46822596] [2022-11-02 20:52:54,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46822596] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:52:54,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:52:54,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 20:52:54,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496931807] [2022-11-02 20:52:54,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:52:54,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:52:54,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:52:54,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:52:54,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:52:54,297 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 166 [2022-11-02 20:52:54,298 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 139 transitions, 302 flow. Second operand has 8 states, 8 states have (on average 120.625) internal successors, (965), 8 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:54,298 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:52:54,298 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 166 [2022-11-02 20:52:54,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:52:56,954 INFO L130 PetriNetUnfolder]: 7591/13480 cut-off events. [2022-11-02 20:52:56,954 INFO L131 PetriNetUnfolder]: For 1020/1020 co-relation queries the response was YES. [2022-11-02 20:52:57,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24437 conditions, 13480 events. 7591/13480 cut-off events. For 1020/1020 co-relation queries the response was YES. Maximal size of possible extension queue 779. Compared 115523 event pairs, 518 based on Foata normal form. 1502/11963 useless extension candidates. Maximal degree in co-relation 24379. Up to 2582 conditions per place. [2022-11-02 20:52:57,096 INFO L137 encePairwiseOnDemand]: 149/166 looper letters, 114 selfloop transitions, 17 changer transitions 6/237 dead transitions. [2022-11-02 20:52:57,096 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 237 transitions, 850 flow [2022-11-02 20:52:57,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:52:57,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-02 20:52:57,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1478 transitions. [2022-11-02 20:52:57,103 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8094194961664841 [2022-11-02 20:52:57,103 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1478 transitions. [2022-11-02 20:52:57,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1478 transitions. [2022-11-02 20:52:57,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:52:57,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1478 transitions. [2022-11-02 20:52:57,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 134.36363636363637) internal successors, (1478), 11 states have internal predecessors, (1478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:57,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 166.0) internal successors, (1992), 12 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:57,114 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 166.0) internal successors, (1992), 12 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:57,114 INFO L175 Difference]: Start difference. First operand has 140 places, 139 transitions, 302 flow. Second operand 11 states and 1478 transitions. [2022-11-02 20:52:57,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 237 transitions, 850 flow [2022-11-02 20:52:57,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 237 transitions, 831 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-11-02 20:52:57,124 INFO L231 Difference]: Finished difference. Result has 153 places, 144 transitions, 390 flow [2022-11-02 20:52:57,125 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=390, PETRI_PLACES=153, PETRI_TRANSITIONS=144} [2022-11-02 20:52:57,127 INFO L287 CegarLoopForPetriNet]: 140 programPoint places, 13 predicate places. [2022-11-02 20:52:57,128 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 144 transitions, 390 flow [2022-11-02 20:52:57,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 120.625) internal successors, (965), 8 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:57,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:52:57,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:52:57,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 20:52:57,129 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-02 20:52:57,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:57,130 INFO L85 PathProgramCache]: Analyzing trace with hash 21293343, now seen corresponding path program 1 times [2022-11-02 20:52:57,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:57,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367268630] [2022-11-02 20:52:57,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:57,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:57,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:57,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:57,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:52:57,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367268630] [2022-11-02 20:52:57,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367268630] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:52:57,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:52:57,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-02 20:52:57,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875131633] [2022-11-02 20:52:57,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:52:57,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:52:57,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:52:57,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:52:57,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:52:57,635 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 166 [2022-11-02 20:52:57,637 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 144 transitions, 390 flow. Second operand has 11 states, 11 states have (on average 119.72727272727273) internal successors, (1317), 11 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:57,637 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:52:57,637 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 166 [2022-11-02 20:52:57,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:53:02,061 INFO L130 PetriNetUnfolder]: 11554/20593 cut-off events. [2022-11-02 20:53:02,061 INFO L131 PetriNetUnfolder]: For 10318/10318 co-relation queries the response was YES. [2022-11-02 20:53:02,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46703 conditions, 20593 events. 11554/20593 cut-off events. For 10318/10318 co-relation queries the response was YES. Maximal size of possible extension queue 1288. Compared 187378 event pairs, 482 based on Foata normal form. 87/16364 useless extension candidates. Maximal degree in co-relation 46638. Up to 2160 conditions per place. [2022-11-02 20:53:02,353 INFO L137 encePairwiseOnDemand]: 154/166 looper letters, 242 selfloop transitions, 47 changer transitions 13/401 dead transitions. [2022-11-02 20:53:02,353 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 401 transitions, 1889 flow [2022-11-02 20:53:02,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 20:53:02,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-02 20:53:02,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2896 transitions. [2022-11-02 20:53:02,361 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7929901423877328 [2022-11-02 20:53:02,362 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2896 transitions. [2022-11-02 20:53:02,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2896 transitions. [2022-11-02 20:53:02,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:53:02,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2896 transitions. [2022-11-02 20:53:02,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 131.63636363636363) internal successors, (2896), 22 states have internal predecessors, (2896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:02,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 166.0) internal successors, (3818), 23 states have internal predecessors, (3818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:02,383 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 166.0) internal successors, (3818), 23 states have internal predecessors, (3818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:02,383 INFO L175 Difference]: Start difference. First operand has 153 places, 144 transitions, 390 flow. Second operand 22 states and 2896 transitions. [2022-11-02 20:53:02,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 401 transitions, 1889 flow [2022-11-02 20:53:02,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 401 transitions, 1883 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-02 20:53:02,823 INFO L231 Difference]: Finished difference. Result has 181 places, 176 transitions, 773 flow [2022-11-02 20:53:02,824 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=773, PETRI_PLACES=181, PETRI_TRANSITIONS=176} [2022-11-02 20:53:02,826 INFO L287 CegarLoopForPetriNet]: 140 programPoint places, 41 predicate places. [2022-11-02 20:53:02,826 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 176 transitions, 773 flow [2022-11-02 20:53:02,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 119.72727272727273) internal successors, (1317), 11 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:02,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:53:02,828 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:02,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-02 20:53:02,828 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-02 20:53:02,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:02,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1632407279, now seen corresponding path program 1 times [2022-11-02 20:53:02,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:53:02,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966065611] [2022-11-02 20:53:02,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:02,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:53:02,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:53:02,871 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:53:02,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:53:02,920 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:53:02,921 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:53:02,921 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-11-02 20:53:02,921 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-11-02 20:53:02,921 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2022-11-02 20:53:02,922 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-02 20:53:02,922 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-02 20:53:02,922 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-02 20:53:02,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-02 20:53:02,923 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-02 20:53:02,923 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:53:02,923 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-02 20:53:02,968 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:53:02,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 200 transitions, 464 flow [2022-11-02 20:53:03,010 INFO L130 PetriNetUnfolder]: 15/231 cut-off events. [2022-11-02 20:53:03,010 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-02 20:53:03,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 231 events. 15/231 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 462 event pairs, 0 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 251. Up to 10 conditions per place. [2022-11-02 20:53:03,013 INFO L82 GeneralOperation]: Start removeDead. Operand has 204 places, 200 transitions, 464 flow [2022-11-02 20:53:03,015 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 160 transitions, 355 flow [2022-11-02 20:53:03,016 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:53:03,017 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;@1f2e95ec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:53:03,017 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-02 20:53:03,022 INFO L130 PetriNetUnfolder]: 3/63 cut-off events. [2022-11-02 20:53:03,022 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:53:03,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:53:03,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:03,023 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-02 20:53:03,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:03,023 INFO L85 PathProgramCache]: Analyzing trace with hash -326012866, now seen corresponding path program 1 times [2022-11-02 20:53:03,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:53:03,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124511334] [2022-11-02 20:53:03,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:03,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:53:03,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:03,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:03,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:53:03,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124511334] [2022-11-02 20:53:03,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124511334] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:53:03,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:53:03,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 20:53:03,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436306828] [2022-11-02 20:53:03,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:53:03,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:53:03,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:53:03,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:53:03,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:53:03,214 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 200 [2022-11-02 20:53:03,216 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 160 transitions, 355 flow. Second operand has 8 states, 8 states have (on average 144.625) internal successors, (1157), 8 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) [2022-11-02 20:53:03,216 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:53:03,216 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 200 [2022-11-02 20:53:03,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:53:16,558 INFO L130 PetriNetUnfolder]: 45643/72699 cut-off events. [2022-11-02 20:53:16,558 INFO L131 PetriNetUnfolder]: For 8184/8184 co-relation queries the response was YES. [2022-11-02 20:53:16,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134417 conditions, 72699 events. 45643/72699 cut-off events. For 8184/8184 co-relation queries the response was YES. Maximal size of possible extension queue 3561. Compared 661180 event pairs, 8708 based on Foata normal form. 8716/63830 useless extension candidates. Maximal degree in co-relation 134358. Up to 16265 conditions per place. [2022-11-02 20:53:17,479 INFO L137 encePairwiseOnDemand]: 181/200 looper letters, 146 selfloop transitions, 20 changer transitions 6/287 dead transitions. [2022-11-02 20:53:17,479 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 287 transitions, 1085 flow [2022-11-02 20:53:17,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:53:17,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-02 20:53:17,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1784 transitions. [2022-11-02 20:53:17,488 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8109090909090909 [2022-11-02 20:53:17,488 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1784 transitions. [2022-11-02 20:53:17,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1784 transitions. [2022-11-02 20:53:17,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:53:17,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1784 transitions. [2022-11-02 20:53:17,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 162.1818181818182) internal successors, (1784), 11 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:17,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 200.0) internal successors, (2400), 12 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:17,503 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 200.0) internal successors, (2400), 12 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:17,503 INFO L175 Difference]: Start difference. First operand has 161 places, 160 transitions, 355 flow. Second operand 11 states and 1784 transitions. [2022-11-02 20:53:17,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 287 transitions, 1085 flow [2022-11-02 20:53:17,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 287 transitions, 1036 flow, removed 24 selfloop flow, removed 1 redundant places. [2022-11-02 20:53:17,513 INFO L231 Difference]: Finished difference. Result has 174 places, 167 transitions, 458 flow [2022-11-02 20:53:17,514 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=458, PETRI_PLACES=174, PETRI_TRANSITIONS=167} [2022-11-02 20:53:17,516 INFO L287 CegarLoopForPetriNet]: 161 programPoint places, 13 predicate places. [2022-11-02 20:53:17,516 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 167 transitions, 458 flow [2022-11-02 20:53:17,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 144.625) internal successors, (1157), 8 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) [2022-11-02 20:53:17,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:53:17,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:17,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-02 20:53:17,518 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-02 20:53:17,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:17,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1636824872, now seen corresponding path program 1 times [2022-11-02 20:53:17,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:53:17,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104543096] [2022-11-02 20:53:17,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:17,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:53:17,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:17,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:17,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:53:17,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104543096] [2022-11-02 20:53:17,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104543096] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:53:17,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:53:17,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-02 20:53:17,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337816934] [2022-11-02 20:53:17,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:53:17,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:53:17,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:53:17,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:53:17,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:53:18,001 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 200 [2022-11-02 20:53:18,003 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 167 transitions, 458 flow. Second operand has 11 states, 11 states have (on average 143.72727272727272) internal successors, (1581), 11 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:18,004 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:53:18,004 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 200 [2022-11-02 20:53:18,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:53:43,374 INFO L130 PetriNetUnfolder]: 76009/121661 cut-off events. [2022-11-02 20:53:43,374 INFO L131 PetriNetUnfolder]: For 70223/70223 co-relation queries the response was YES. [2022-11-02 20:53:44,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 282588 conditions, 121661 events. 76009/121661 cut-off events. For 70223/70223 co-relation queries the response was YES. Maximal size of possible extension queue 6340. Compared 1176418 event pairs, 5594 based on Foata normal form. 390/95480 useless extension candidates. Maximal degree in co-relation 282522. Up to 15768 conditions per place. [2022-11-02 20:53:45,101 INFO L137 encePairwiseOnDemand]: 187/200 looper letters, 322 selfloop transitions, 57 changer transitions 13/506 dead transitions. [2022-11-02 20:53:45,101 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 506 transitions, 2463 flow [2022-11-02 20:53:45,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 20:53:45,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-02 20:53:45,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3514 transitions. [2022-11-02 20:53:45,110 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7986363636363636 [2022-11-02 20:53:45,110 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3514 transitions. [2022-11-02 20:53:45,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3514 transitions. [2022-11-02 20:53:45,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:53:45,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3514 transitions. [2022-11-02 20:53:45,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 159.72727272727272) internal successors, (3514), 22 states have internal predecessors, (3514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:45,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 200.0) internal successors, (4600), 23 states have internal predecessors, (4600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:45,129 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 200.0) internal successors, (4600), 23 states have internal predecessors, (4600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:45,130 INFO L175 Difference]: Start difference. First operand has 174 places, 167 transitions, 458 flow. Second operand 22 states and 3514 transitions. [2022-11-02 20:53:45,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 506 transitions, 2463 flow [2022-11-02 20:53:50,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 506 transitions, 2457 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-02 20:53:50,232 INFO L231 Difference]: Finished difference. Result has 202 places, 206 transitions, 932 flow [2022-11-02 20:53:50,233 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=932, PETRI_PLACES=202, PETRI_TRANSITIONS=206} [2022-11-02 20:53:50,233 INFO L287 CegarLoopForPetriNet]: 161 programPoint places, 41 predicate places. [2022-11-02 20:53:50,234 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 206 transitions, 932 flow [2022-11-02 20:53:50,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 143.72727272727272) internal successors, (1581), 11 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:50,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:53:50,235 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:50,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-02 20:53:50,236 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-02 20:53:50,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:50,236 INFO L85 PathProgramCache]: Analyzing trace with hash 920493694, now seen corresponding path program 1 times [2022-11-02 20:53:50,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:53:50,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45934012] [2022-11-02 20:53:50,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:50,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:53:50,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:50,505 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:50,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:53:50,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45934012] [2022-11-02 20:53:50,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45934012] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:53:50,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179626588] [2022-11-02 20:53:50,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:50,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:53:50,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f91509b1-4815-4b5b-9368-5b86560ebcab/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:53:50,511 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f91509b1-4815-4b5b-9368-5b86560ebcab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:53:50,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f91509b1-4815-4b5b-9368-5b86560ebcab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:53:50,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:50,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-02 20:53:50,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:53:51,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:51,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:53:51,269 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:51,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179626588] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:53:51,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:53:51,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-11-02 20:53:51,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91263573] [2022-11-02 20:53:51,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:53:51,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-02 20:53:51,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:53:51,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-02 20:53:51,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-11-02 20:53:51,276 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 200 [2022-11-02 20:53:51,280 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 206 transitions, 932 flow. Second operand has 25 states, 25 states have (on average 143.24) internal successors, (3581), 25 states have internal predecessors, (3581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:51,280 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:53:51,280 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 200 [2022-11-02 20:53:51,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand