./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/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_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/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_4bfadffa-befc-4c22-839f-ea6be1a1d401/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 cb010ae024b402436affeb854f96a5f9e0df3d8ec2cfe8b3a7f33676b7169a2c --- 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 20:43:11,021 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:43:11,024 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:43:11,073 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:43:11,073 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:43:11,080 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:43:11,082 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:43:11,087 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:43:11,089 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:43:11,090 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:43:11,091 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:43:11,092 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:43:11,092 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:43:11,096 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:43:11,097 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:43:11,099 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:43:11,101 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:43:11,108 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:43:11,109 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:43:11,112 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:43:11,117 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:43:11,119 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:43:11,120 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:43:11,123 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:43:11,127 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:43:11,133 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:43:11,134 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:43:11,135 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:43:11,135 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:43:11,136 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:43:11,138 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:43:11,139 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:43:11,140 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:43:11,142 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:43:11,143 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:43:11,144 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:43:11,146 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:43:11,146 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:43:11,146 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:43:11,147 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:43:11,148 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:43:11,149 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:43:11,186 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:43:11,186 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:43:11,187 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:43:11,187 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:43:11,188 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:43:11,189 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:43:11,189 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:43:11,189 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:43:11,190 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:43:11,190 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:43:11,191 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:43:11,191 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:43:11,192 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:43:11,192 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:43:11,192 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:43:11,192 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:43:11,192 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:43:11,193 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:43:11,193 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:43:11,193 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:43:11,193 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:43:11,194 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:43:11,194 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:43:11,194 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:43:11,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:43:11,195 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:43:11,196 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:43:11,196 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:43:11,197 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:43:11,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:43:11,197 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:43:11,197 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:43:11,198 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:43:11,198 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_4bfadffa-befc-4c22-839f-ea6be1a1d401/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb010ae024b402436affeb854f96a5f9e0df3d8ec2cfe8b3a7f33676b7169a2c [2022-11-02 20:43:11,495 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:43:11,525 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:43:11,528 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:43:11,530 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:43:11,531 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:43:11,533 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i [2022-11-02 20:43:11,605 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/data/b3b66292c/61bbe0de2e0048d59ce806c2a47bf5e7/FLAG23740dc01 [2022-11-02 20:43:12,112 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:43:12,112 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i [2022-11-02 20:43:12,129 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/data/b3b66292c/61bbe0de2e0048d59ce806c2a47bf5e7/FLAG23740dc01 [2022-11-02 20:43:12,399 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/data/b3b66292c/61bbe0de2e0048d59ce806c2a47bf5e7 [2022-11-02 20:43:12,401 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:43:12,402 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:43:12,403 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:43:12,404 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:43:12,407 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:43:12,408 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:43:12" (1/1) ... [2022-11-02 20:43:12,409 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33c91869 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:12, skipping insertion in model container [2022-11-02 20:43:12,409 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:43:12" (1/1) ... [2022-11-02 20:43:12,417 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:43:12,448 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:43:12,887 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_4bfadffa-befc-4c22-839f-ea6be1a1d401/sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i[30176,30189] [2022-11-02 20:43:12,926 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:43:12,939 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:43:12,977 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_4bfadffa-befc-4c22-839f-ea6be1a1d401/sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i[30176,30189] [2022-11-02 20:43:12,984 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:43:13,023 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:43:13,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:13 WrapperNode [2022-11-02 20:43:13,024 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:43:13,025 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:43:13,025 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:43:13,025 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:43:13,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:13" (1/1) ... [2022-11-02 20:43:13,051 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:13" (1/1) ... [2022-11-02 20:43:13,080 INFO L138 Inliner]: procedures = 170, calls = 35, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2022-11-02 20:43:13,080 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:43:13,081 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:43:13,081 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:43:13,081 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:43:13,087 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:13" (1/1) ... [2022-11-02 20:43:13,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:13" (1/1) ... [2022-11-02 20:43:13,090 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:13" (1/1) ... [2022-11-02 20:43:13,091 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:13" (1/1) ... [2022-11-02 20:43:13,096 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:13" (1/1) ... [2022-11-02 20:43:13,100 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:13" (1/1) ... [2022-11-02 20:43:13,102 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:13" (1/1) ... [2022-11-02 20:43:13,103 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:13" (1/1) ... [2022-11-02 20:43:13,106 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:43:13,106 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:43:13,107 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:43:13,107 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:43:13,108 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:13" (1/1) ... [2022-11-02 20:43:13,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:43:13,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:13,143 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:43:13,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:43:13,184 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:43:13,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:43:13,184 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-02 20:43:13,184 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:43:13,185 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:43:13,185 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-02 20:43:13,185 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-02 20:43:13,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:43:13,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:43:13,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:43:13,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:43:13,187 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 20:43:13,315 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:43:13,317 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:43:13,541 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:43:13,548 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:43:13,548 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-11-02 20:43:13,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:43:13 BoogieIcfgContainer [2022-11-02 20:43:13,551 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:43:13,553 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:43:13,553 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:43:13,557 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:43:13,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:43:12" (1/3) ... [2022-11-02 20:43:13,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34c97929 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:43:13, skipping insertion in model container [2022-11-02 20:43:13,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:13" (2/3) ... [2022-11-02 20:43:13,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34c97929 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:43:13, skipping insertion in model container [2022-11-02 20:43:13,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:43:13" (3/3) ... [2022-11-02 20:43:13,560 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_21-deref_read_racing.i [2022-11-02 20:43:13,569 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-02 20:43:13,580 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:43:13,580 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:43:13,580 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-02 20:43:13,668 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:43:13,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 103 transitions, 211 flow [2022-11-02 20:43:13,805 INFO L130 PetriNetUnfolder]: 14/134 cut-off events. [2022-11-02 20:43:13,806 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:43:13,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 134 events. 14/134 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 291 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 68. Up to 4 conditions per place. [2022-11-02 20:43:13,811 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 103 transitions, 211 flow [2022-11-02 20:43:13,836 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 103 transitions, 211 flow [2022-11-02 20:43:13,847 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:43:13,855 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;@4e0ca16a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:43:13,855 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:43:13,880 INFO L130 PetriNetUnfolder]: 2/73 cut-off events. [2022-11-02 20:43:13,880 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:43:13,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:13,882 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] [2022-11-02 20:43:13,882 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:13,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:13,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1011992479, now seen corresponding path program 1 times [2022-11-02 20:43:13,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:13,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674796291] [2022-11-02 20:43:13,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:13,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:14,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:14,170 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 20:43:14,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:14,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674796291] [2022-11-02 20:43:14,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674796291] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:43:14,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:43:14,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:43:14,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125631485] [2022-11-02 20:43:14,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:43:14,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:43:14,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:14,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:43:14,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:43:14,247 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 103 [2022-11-02 20:43:14,254 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 103 transitions, 211 flow. Second operand has 2 states, 2 states have (on average 91.5) internal successors, (183), 2 states have internal predecessors, (183), 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 20:43:14,256 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:14,256 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 103 [2022-11-02 20:43:14,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:14,330 INFO L130 PetriNetUnfolder]: 0/118 cut-off events. [2022-11-02 20:43:14,330 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-02 20:43:14,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 118 events. 0/118 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 172 event pairs, 0 based on Foata normal form. 14/128 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2022-11-02 20:43:14,332 INFO L137 encePairwiseOnDemand]: 93/103 looper letters, 1 selfloop transitions, 0 changer transitions 11/92 dead transitions. [2022-11-02 20:43:14,332 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 92 transitions, 191 flow [2022-11-02 20:43:14,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:43:14,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:43:14,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 193 transitions. [2022-11-02 20:43:14,347 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9368932038834952 [2022-11-02 20:43:14,348 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 193 transitions. [2022-11-02 20:43:14,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 193 transitions. [2022-11-02 20:43:14,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:14,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 193 transitions. [2022-11-02 20:43:14,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 96.5) internal successors, (193), 2 states have internal predecessors, (193), 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 20:43:14,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 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 20:43:14,365 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 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 20:43:14,367 INFO L175 Difference]: Start difference. First operand has 96 places, 103 transitions, 211 flow. Second operand 2 states and 193 transitions. [2022-11-02 20:43:14,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 92 transitions, 191 flow [2022-11-02 20:43:14,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 92 transitions, 191 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:43:14,376 INFO L231 Difference]: Finished difference. Result has 96 places, 81 transitions, 167 flow [2022-11-02 20:43:14,380 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=103, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=167, PETRI_PLACES=96, PETRI_TRANSITIONS=81} [2022-11-02 20:43:14,385 INFO L287 CegarLoopForPetriNet]: 96 programPoint places, 0 predicate places. [2022-11-02 20:43:14,386 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 81 transitions, 167 flow [2022-11-02 20:43:14,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 91.5) internal successors, (183), 2 states have internal predecessors, (183), 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 20:43:14,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:14,386 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] [2022-11-02 20:43:14,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:43:14,387 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:14,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:14,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1486023458, now seen corresponding path program 1 times [2022-11-02 20:43:14,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:14,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616621579] [2022-11-02 20:43:14,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:14,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:14,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:14,649 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 20:43:14,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:14,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616621579] [2022-11-02 20:43:14,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616621579] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:43:14,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:43:14,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:43:14,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531808673] [2022-11-02 20:43:14,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:43:14,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:43:14,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:14,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:43:14,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:43:14,655 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 103 [2022-11-02 20:43:14,656 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 81 transitions, 167 flow. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 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 20:43:14,656 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:14,656 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 103 [2022-11-02 20:43:14,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:14,703 INFO L130 PetriNetUnfolder]: 0/85 cut-off events. [2022-11-02 20:43:14,704 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:43:14,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 85 events. 0/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 50 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-11-02 20:43:14,705 INFO L137 encePairwiseOnDemand]: 100/103 looper letters, 8 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2022-11-02 20:43:14,705 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 83 transitions, 191 flow [2022-11-02 20:43:14,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:43:14,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:43:14,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 263 transitions. [2022-11-02 20:43:14,711 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8511326860841424 [2022-11-02 20:43:14,712 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 263 transitions. [2022-11-02 20:43:14,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 263 transitions. [2022-11-02 20:43:14,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:14,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 263 transitions. [2022-11-02 20:43:14,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 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 20:43:14,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 103.0) internal successors, (412), 4 states have internal predecessors, (412), 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 20:43:14,716 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 103.0) internal successors, (412), 4 states have internal predecessors, (412), 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 20:43:14,716 INFO L175 Difference]: Start difference. First operand has 96 places, 81 transitions, 167 flow. Second operand 3 states and 263 transitions. [2022-11-02 20:43:14,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 83 transitions, 191 flow [2022-11-02 20:43:14,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 83 transitions, 191 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:43:14,719 INFO L231 Difference]: Finished difference. Result has 88 places, 81 transitions, 175 flow [2022-11-02 20:43:14,719 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=103, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=175, PETRI_PLACES=88, PETRI_TRANSITIONS=81} [2022-11-02 20:43:14,720 INFO L287 CegarLoopForPetriNet]: 96 programPoint places, -8 predicate places. [2022-11-02 20:43:14,720 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 81 transitions, 175 flow [2022-11-02 20:43:14,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 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 20:43:14,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:14,721 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] [2022-11-02 20:43:14,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:43:14,722 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:14,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:14,722 INFO L85 PathProgramCache]: Analyzing trace with hash 455753518, now seen corresponding path program 1 times [2022-11-02 20:43:14,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:14,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776065163] [2022-11-02 20:43:14,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:14,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:14,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:43:14,792 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:43:14,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:43:14,871 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:43:14,871 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:43:14,872 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:43:14,875 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:43:14,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:43:14,875 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-02 20:43:14,879 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:43:14,879 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-02 20:43:14,907 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:43:14,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 136 transitions, 284 flow [2022-11-02 20:43:14,959 INFO L130 PetriNetUnfolder]: 24/203 cut-off events. [2022-11-02 20:43:14,960 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-02 20:43:14,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 203 events. 24/203 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 553 event pairs, 0 based on Foata normal form. 0/173 useless extension candidates. Maximal degree in co-relation 135. Up to 6 conditions per place. [2022-11-02 20:43:14,965 INFO L82 GeneralOperation]: Start removeDead. Operand has 125 places, 136 transitions, 284 flow [2022-11-02 20:43:14,969 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 136 transitions, 284 flow [2022-11-02 20:43:14,978 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:43:14,984 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;@4e0ca16a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:43:14,984 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:43:14,997 INFO L130 PetriNetUnfolder]: 4/79 cut-off events. [2022-11-02 20:43:14,998 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:43:14,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:14,998 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] [2022-11-02 20:43:14,999 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:14,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:14,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1299574369, now seen corresponding path program 1 times [2022-11-02 20:43:15,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:15,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802291044] [2022-11-02 20:43:15,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:15,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:15,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:15,053 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 20:43:15,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:15,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802291044] [2022-11-02 20:43:15,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802291044] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:43:15,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:43:15,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:43:15,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391291147] [2022-11-02 20:43:15,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:43:15,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:43:15,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:15,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:43:15,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:43:15,057 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 136 [2022-11-02 20:43:15,057 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 136 transitions, 284 flow. Second operand has 2 states, 2 states have (on average 117.5) internal successors, (235), 2 states have internal predecessors, (235), 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 20:43:15,058 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:15,058 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 136 [2022-11-02 20:43:15,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:15,124 INFO L130 PetriNetUnfolder]: 0/176 cut-off events. [2022-11-02 20:43:15,125 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-02 20:43:15,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189 conditions, 176 events. 0/176 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 406 event pairs, 0 based on Foata normal form. 26/196 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2022-11-02 20:43:15,126 INFO L137 encePairwiseOnDemand]: 120/136 looper letters, 2 selfloop transitions, 0 changer transitions 11/119 dead transitions. [2022-11-02 20:43:15,126 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 119 transitions, 254 flow [2022-11-02 20:43:15,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:43:15,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:43:15,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 252 transitions. [2022-11-02 20:43:15,133 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9264705882352942 [2022-11-02 20:43:15,133 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 252 transitions. [2022-11-02 20:43:15,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 252 transitions. [2022-11-02 20:43:15,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:15,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 252 transitions. [2022-11-02 20:43:15,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 126.0) internal successors, (252), 2 states have internal predecessors, (252), 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 20:43:15,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 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 20:43:15,139 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 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 20:43:15,139 INFO L175 Difference]: Start difference. First operand has 125 places, 136 transitions, 284 flow. Second operand 2 states and 252 transitions. [2022-11-02 20:43:15,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 119 transitions, 254 flow [2022-11-02 20:43:15,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 119 transitions, 252 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-02 20:43:15,146 INFO L231 Difference]: Finished difference. Result has 125 places, 108 transitions, 226 flow [2022-11-02 20:43:15,147 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=226, PETRI_PLACES=125, PETRI_TRANSITIONS=108} [2022-11-02 20:43:15,150 INFO L287 CegarLoopForPetriNet]: 125 programPoint places, 0 predicate places. [2022-11-02 20:43:15,150 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 108 transitions, 226 flow [2022-11-02 20:43:15,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 117.5) internal successors, (235), 2 states have internal predecessors, (235), 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 20:43:15,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:15,151 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] [2022-11-02 20:43:15,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 20:43:15,151 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:15,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:15,152 INFO L85 PathProgramCache]: Analyzing trace with hash -497376990, now seen corresponding path program 1 times [2022-11-02 20:43:15,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:15,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272934014] [2022-11-02 20:43:15,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:15,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:15,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:15,264 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 20:43:15,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:15,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272934014] [2022-11-02 20:43:15,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272934014] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:43:15,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:43:15,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:43:15,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354570575] [2022-11-02 20:43:15,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:43:15,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:43:15,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:15,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:43:15,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:43:15,268 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 136 [2022-11-02 20:43:15,269 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 108 transitions, 226 flow. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 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 20:43:15,269 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:15,269 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 136 [2022-11-02 20:43:15,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:15,306 INFO L130 PetriNetUnfolder]: 0/132 cut-off events. [2022-11-02 20:43:15,306 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-02 20:43:15,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 132 events. 0/132 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 201 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2022-11-02 20:43:15,307 INFO L137 encePairwiseOnDemand]: 133/136 looper letters, 11 selfloop transitions, 2 changer transitions 0/112 dead transitions. [2022-11-02 20:43:15,307 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 112 transitions, 260 flow [2022-11-02 20:43:15,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:43:15,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:43:15,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 344 transitions. [2022-11-02 20:43:15,309 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8431372549019608 [2022-11-02 20:43:15,310 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 344 transitions. [2022-11-02 20:43:15,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 344 transitions. [2022-11-02 20:43:15,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:15,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 344 transitions. [2022-11-02 20:43:15,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 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 20:43:15,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 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 20:43:15,313 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 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 20:43:15,313 INFO L175 Difference]: Start difference. First operand has 125 places, 108 transitions, 226 flow. Second operand 3 states and 344 transitions. [2022-11-02 20:43:15,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 112 transitions, 260 flow [2022-11-02 20:43:15,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 112 transitions, 260 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:43:15,317 INFO L231 Difference]: Finished difference. Result has 117 places, 109 transitions, 238 flow [2022-11-02 20:43:15,317 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=117, PETRI_TRANSITIONS=109} [2022-11-02 20:43:15,318 INFO L287 CegarLoopForPetriNet]: 125 programPoint places, -8 predicate places. [2022-11-02 20:43:15,318 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 109 transitions, 238 flow [2022-11-02 20:43:15,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 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 20:43:15,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:15,319 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] [2022-11-02 20:43:15,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 20:43:15,319 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:15,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:15,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1229485238, now seen corresponding path program 1 times [2022-11-02 20:43:15,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:15,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118040460] [2022-11-02 20:43:15,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:15,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:15,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:15,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:15,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:15,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118040460] [2022-11-02 20:43:15,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118040460] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:15,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369084230] [2022-11-02 20:43:15,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:15,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:15,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:15,475 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:15,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:43:15,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:15,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:43:15,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:15,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:15,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:15,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:15,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369084230] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:43:15,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:43:15,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:43:15,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535077732] [2022-11-02 20:43:15,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:15,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:43:15,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:15,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:43:15,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:43:15,800 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 136 [2022-11-02 20:43:15,803 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 109 transitions, 238 flow. Second operand has 10 states, 10 states have (on average 111.3) internal successors, (1113), 10 states have internal predecessors, (1113), 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 20:43:15,803 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:15,803 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 136 [2022-11-02 20:43:15,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:15,908 INFO L130 PetriNetUnfolder]: 0/110 cut-off events. [2022-11-02 20:43:15,908 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-02 20:43:15,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 110 events. 0/110 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 91 event pairs, 0 based on Foata normal form. 2/112 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2022-11-02 20:43:15,908 INFO L137 encePairwiseOnDemand]: 131/136 looper letters, 9 selfloop transitions, 7 changer transitions 0/104 dead transitions. [2022-11-02 20:43:15,909 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 104 transitions, 258 flow [2022-11-02 20:43:15,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:43:15,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:43:15,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 999 transitions. [2022-11-02 20:43:15,911 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8161764705882353 [2022-11-02 20:43:15,912 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 999 transitions. [2022-11-02 20:43:15,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 999 transitions. [2022-11-02 20:43:15,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:15,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 999 transitions. [2022-11-02 20:43:15,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 111.0) internal successors, (999), 9 states have internal predecessors, (999), 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 20:43:15,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 136.0) internal successors, (1360), 10 states have internal predecessors, (1360), 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 20:43:15,928 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 136.0) internal successors, (1360), 10 states have internal predecessors, (1360), 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 20:43:15,928 INFO L175 Difference]: Start difference. First operand has 117 places, 109 transitions, 238 flow. Second operand 9 states and 999 transitions. [2022-11-02 20:43:15,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 104 transitions, 258 flow [2022-11-02 20:43:15,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 104 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:43:15,933 INFO L231 Difference]: Finished difference. Result has 113 places, 100 transitions, 230 flow [2022-11-02 20:43:15,934 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=230, PETRI_PLACES=113, PETRI_TRANSITIONS=100} [2022-11-02 20:43:15,937 INFO L287 CegarLoopForPetriNet]: 125 programPoint places, -12 predicate places. [2022-11-02 20:43:15,937 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 100 transitions, 230 flow [2022-11-02 20:43:15,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 111.3) internal successors, (1113), 10 states have internal predecessors, (1113), 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 20:43:15,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:15,940 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] [2022-11-02 20:43:15,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:16,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:16,163 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:16,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:16,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1842596803, now seen corresponding path program 1 times [2022-11-02 20:43:16,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:16,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715673346] [2022-11-02 20:43:16,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:16,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:16,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:43:16,185 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:43:16,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:43:16,227 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:43:16,227 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:43:16,227 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:43:16,227 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:43:16,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-02 20:43:16,228 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-02 20:43:16,228 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:43:16,229 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-02 20:43:16,272 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:43:16,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 169 transitions, 359 flow [2022-11-02 20:43:16,323 INFO L130 PetriNetUnfolder]: 34/272 cut-off events. [2022-11-02 20:43:16,323 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-02 20:43:16,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288 conditions, 272 events. 34/272 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 799 event pairs, 0 based on Foata normal form. 0/230 useless extension candidates. Maximal degree in co-relation 207. Up to 8 conditions per place. [2022-11-02 20:43:16,328 INFO L82 GeneralOperation]: Start removeDead. Operand has 154 places, 169 transitions, 359 flow [2022-11-02 20:43:16,333 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 169 transitions, 359 flow [2022-11-02 20:43:16,334 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:43:16,336 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;@4e0ca16a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:43:16,341 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:43:16,350 INFO L130 PetriNetUnfolder]: 4/78 cut-off events. [2022-11-02 20:43:16,356 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:43:16,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:16,356 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] [2022-11-02 20:43:16,356 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:16,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:16,357 INFO L85 PathProgramCache]: Analyzing trace with hash -56624670, now seen corresponding path program 1 times [2022-11-02 20:43:16,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:16,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819120531] [2022-11-02 20:43:16,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:16,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:16,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:16,406 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 20:43:16,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:16,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819120531] [2022-11-02 20:43:16,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819120531] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:43:16,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:43:16,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:43:16,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292839578] [2022-11-02 20:43:16,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:43:16,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:43:16,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:16,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:43:16,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:43:16,409 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 169 [2022-11-02 20:43:16,410 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 169 transitions, 359 flow. Second operand has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 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 20:43:16,410 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:16,410 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 169 [2022-11-02 20:43:16,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:16,478 INFO L130 PetriNetUnfolder]: 0/212 cut-off events. [2022-11-02 20:43:16,478 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-02 20:43:16,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251 conditions, 212 events. 0/212 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 553 event pairs, 0 based on Foata normal form. 129/335 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2022-11-02 20:43:16,479 INFO L137 encePairwiseOnDemand]: 144/169 looper letters, 12 selfloop transitions, 2 changer transitions 11/150 dead transitions. [2022-11-02 20:43:16,480 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 150 transitions, 349 flow [2022-11-02 20:43:16,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:43:16,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:43:16,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 452 transitions. [2022-11-02 20:43:16,496 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8915187376725838 [2022-11-02 20:43:16,496 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 452 transitions. [2022-11-02 20:43:16,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 452 transitions. [2022-11-02 20:43:16,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:16,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 452 transitions. [2022-11-02 20:43:16,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 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 20:43:16,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 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 20:43:16,500 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 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 20:43:16,502 INFO L175 Difference]: Start difference. First operand has 154 places, 169 transitions, 359 flow. Second operand 3 states and 452 transitions. [2022-11-02 20:43:16,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 150 transitions, 349 flow [2022-11-02 20:43:16,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 150 transitions, 343 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-11-02 20:43:16,505 INFO L231 Difference]: Finished difference. Result has 156 places, 136 transitions, 297 flow [2022-11-02 20:43:16,505 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=297, PETRI_PLACES=156, PETRI_TRANSITIONS=136} [2022-11-02 20:43:16,506 INFO L287 CegarLoopForPetriNet]: 154 programPoint places, 2 predicate places. [2022-11-02 20:43:16,506 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 136 transitions, 297 flow [2022-11-02 20:43:16,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 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 20:43:16,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:16,507 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] [2022-11-02 20:43:16,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-02 20:43:16,507 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:16,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:16,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1053701942, now seen corresponding path program 1 times [2022-11-02 20:43:16,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:16,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011186939] [2022-11-02 20:43:16,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:16,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:16,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:16,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:16,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:16,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011186939] [2022-11-02 20:43:16,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011186939] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:16,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725784890] [2022-11-02 20:43:16,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:16,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:16,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:16,640 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:16,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:43:16,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:16,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:43:16,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:16,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:16,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:16,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:16,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725784890] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:43:16,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:43:16,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:43:16,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146978128] [2022-11-02 20:43:16,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:16,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:43:16,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:16,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:43:16,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:43:16,829 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 169 [2022-11-02 20:43:16,830 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 136 transitions, 297 flow. Second operand has 10 states, 10 states have (on average 137.3) internal successors, (1373), 10 states have internal predecessors, (1373), 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 20:43:16,831 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:16,831 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 169 [2022-11-02 20:43:16,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:16,927 INFO L130 PetriNetUnfolder]: 0/157 cut-off events. [2022-11-02 20:43:16,927 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-02 20:43:16,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 157 events. 0/157 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 242 event pairs, 0 based on Foata normal form. 2/159 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-11-02 20:43:16,928 INFO L137 encePairwiseOnDemand]: 163/169 looper letters, 13 selfloop transitions, 9 changer transitions 0/146 dead transitions. [2022-11-02 20:43:16,928 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 146 transitions, 363 flow [2022-11-02 20:43:16,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:43:16,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:43:16,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1239 transitions. [2022-11-02 20:43:16,931 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.814595660749507 [2022-11-02 20:43:16,931 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1239 transitions. [2022-11-02 20:43:16,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1239 transitions. [2022-11-02 20:43:16,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:16,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1239 transitions. [2022-11-02 20:43:16,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 137.66666666666666) internal successors, (1239), 9 states have internal predecessors, (1239), 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 20:43:16,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 169.0) internal successors, (1690), 10 states have internal predecessors, (1690), 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 20:43:16,939 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 169.0) internal successors, (1690), 10 states have internal predecessors, (1690), 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 20:43:16,939 INFO L175 Difference]: Start difference. First operand has 156 places, 136 transitions, 297 flow. Second operand 9 states and 1239 transitions. [2022-11-02 20:43:16,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 146 transitions, 363 flow [2022-11-02 20:43:16,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 146 transitions, 361 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:43:16,943 INFO L231 Difference]: Finished difference. Result has 155 places, 142 transitions, 345 flow [2022-11-02 20:43:16,943 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=345, PETRI_PLACES=155, PETRI_TRANSITIONS=142} [2022-11-02 20:43:16,944 INFO L287 CegarLoopForPetriNet]: 154 programPoint places, 1 predicate places. [2022-11-02 20:43:16,944 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 142 transitions, 345 flow [2022-11-02 20:43:16,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 137.3) internal successors, (1373), 10 states have internal predecessors, (1373), 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 20:43:16,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:16,945 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] [2022-11-02 20:43:16,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:17,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-02 20:43:17,164 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:17,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:17,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1441395879, now seen corresponding path program 1 times [2022-11-02 20:43:17,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:17,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524795119] [2022-11-02 20:43:17,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:17,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:17,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:43:17,183 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:43:17,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:43:17,205 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:43:17,206 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:43:17,209 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:43:17,209 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:43:17,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-02 20:43:17,210 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-02 20:43:17,211 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:43:17,211 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-02 20:43:17,243 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:43:17,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 202 transitions, 436 flow [2022-11-02 20:43:17,297 INFO L130 PetriNetUnfolder]: 44/341 cut-off events. [2022-11-02 20:43:17,297 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-02 20:43:17,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364 conditions, 341 events. 44/341 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1080 event pairs, 0 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 280. Up to 10 conditions per place. [2022-11-02 20:43:17,301 INFO L82 GeneralOperation]: Start removeDead. Operand has 183 places, 202 transitions, 436 flow [2022-11-02 20:43:17,305 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 183 places, 202 transitions, 436 flow [2022-11-02 20:43:17,306 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:43:17,306 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;@4e0ca16a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:43:17,306 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:43:17,313 INFO L130 PetriNetUnfolder]: 2/72 cut-off events. [2022-11-02 20:43:17,313 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:43:17,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:17,314 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] [2022-11-02 20:43:17,314 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:17,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:17,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1486686878, now seen corresponding path program 1 times [2022-11-02 20:43:17,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:17,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070844060] [2022-11-02 20:43:17,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:17,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:17,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:17,350 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 20:43:17,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:17,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070844060] [2022-11-02 20:43:17,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070844060] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:43:17,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:43:17,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:43:17,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862945982] [2022-11-02 20:43:17,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:43:17,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:43:17,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:17,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:43:17,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:43:17,353 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 202 [2022-11-02 20:43:17,354 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 202 transitions, 436 flow. Second operand has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 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 20:43:17,354 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:17,354 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 202 [2022-11-02 20:43:17,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:17,454 INFO L130 PetriNetUnfolder]: 0/270 cut-off events. [2022-11-02 20:43:17,454 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-02 20:43:17,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 270 events. 0/270 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 804 event pairs, 0 based on Foata normal form. 236/498 useless extension candidates. Maximal degree in co-relation 0. Up to 24 conditions per place. [2022-11-02 20:43:17,455 INFO L137 encePairwiseOnDemand]: 171/202 looper letters, 13 selfloop transitions, 2 changer transitions 11/177 dead transitions. [2022-11-02 20:43:17,455 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 177 transitions, 416 flow [2022-11-02 20:43:17,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:43:17,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:43:17,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 537 transitions. [2022-11-02 20:43:17,458 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8861386138613861 [2022-11-02 20:43:17,458 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 537 transitions. [2022-11-02 20:43:17,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 537 transitions. [2022-11-02 20:43:17,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:17,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 537 transitions. [2022-11-02 20:43:17,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 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 20:43:17,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 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 20:43:17,463 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 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 20:43:17,463 INFO L175 Difference]: Start difference. First operand has 183 places, 202 transitions, 436 flow. Second operand 3 states and 537 transitions. [2022-11-02 20:43:17,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 177 transitions, 416 flow [2022-11-02 20:43:17,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 177 transitions, 404 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-11-02 20:43:17,468 INFO L231 Difference]: Finished difference. Result has 185 places, 163 transitions, 356 flow [2022-11-02 20:43:17,468 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=356, PETRI_PLACES=185, PETRI_TRANSITIONS=163} [2022-11-02 20:43:17,469 INFO L287 CegarLoopForPetriNet]: 183 programPoint places, 2 predicate places. [2022-11-02 20:43:17,469 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 163 transitions, 356 flow [2022-11-02 20:43:17,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 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 20:43:17,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:17,470 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] [2022-11-02 20:43:17,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-02 20:43:17,471 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:17,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:17,471 INFO L85 PathProgramCache]: Analyzing trace with hash 2070147350, now seen corresponding path program 1 times [2022-11-02 20:43:17,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:17,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927715798] [2022-11-02 20:43:17,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:17,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:17,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:17,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:17,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:17,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927715798] [2022-11-02 20:43:17,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927715798] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:17,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218758499] [2022-11-02 20:43:17,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:17,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:17,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:17,554 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:17,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:43:17,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:17,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:43:17,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:17,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:17,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:17,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:17,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218758499] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:43:17,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:43:17,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:43:17,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245135675] [2022-11-02 20:43:17,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:17,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:43:17,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:17,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:43:17,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:43:17,762 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 202 [2022-11-02 20:43:17,763 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 163 transitions, 356 flow. Second operand has 10 states, 10 states have (on average 163.3) internal successors, (1633), 10 states have internal predecessors, (1633), 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 20:43:17,764 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:17,764 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 202 [2022-11-02 20:43:17,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:17,906 INFO L130 PetriNetUnfolder]: 0/204 cut-off events. [2022-11-02 20:43:17,906 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-02 20:43:17,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 204 events. 0/204 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 412 event pairs, 0 based on Foata normal form. 2/206 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-11-02 20:43:17,907 INFO L137 encePairwiseOnDemand]: 196/202 looper letters, 14 selfloop transitions, 9 changer transitions 0/173 dead transitions. [2022-11-02 20:43:17,907 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 173 transitions, 424 flow [2022-11-02 20:43:17,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:43:17,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:43:17,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1474 transitions. [2022-11-02 20:43:17,911 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8107810781078107 [2022-11-02 20:43:17,911 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1474 transitions. [2022-11-02 20:43:17,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1474 transitions. [2022-11-02 20:43:17,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:17,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1474 transitions. [2022-11-02 20:43:17,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 163.77777777777777) internal successors, (1474), 9 states have internal predecessors, (1474), 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 20:43:17,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 202.0) internal successors, (2020), 10 states have internal predecessors, (2020), 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 20:43:17,920 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 202.0) internal successors, (2020), 10 states have internal predecessors, (2020), 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 20:43:17,920 INFO L175 Difference]: Start difference. First operand has 185 places, 163 transitions, 356 flow. Second operand 9 states and 1474 transitions. [2022-11-02 20:43:17,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 173 transitions, 424 flow [2022-11-02 20:43:17,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 173 transitions, 422 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:43:17,925 INFO L231 Difference]: Finished difference. Result has 184 places, 169 transitions, 404 flow [2022-11-02 20:43:17,925 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=404, PETRI_PLACES=184, PETRI_TRANSITIONS=169} [2022-11-02 20:43:17,926 INFO L287 CegarLoopForPetriNet]: 183 programPoint places, 1 predicate places. [2022-11-02 20:43:17,926 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 169 transitions, 404 flow [2022-11-02 20:43:17,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 163.3) internal successors, (1633), 10 states have internal predecessors, (1633), 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 20:43:17,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:17,930 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:17,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:18,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-02 20:43:18,155 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:18,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:18,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1101282751, now seen corresponding path program 1 times [2022-11-02 20:43:18,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:18,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553321659] [2022-11-02 20:43:18,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:18,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:18,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:18,365 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:18,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:18,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553321659] [2022-11-02 20:43:18,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553321659] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:18,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959528031] [2022-11-02 20:43:18,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:18,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:18,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:18,367 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:18,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:43:18,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:18,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:43:18,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:18,554 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:18,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:18,668 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:18,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959528031] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:43:18,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:43:18,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:43:18,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468923077] [2022-11-02 20:43:18,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:18,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:43:18,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:18,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:43:18,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:43:18,674 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 202 [2022-11-02 20:43:18,678 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 169 transitions, 404 flow. Second operand has 18 states, 18 states have (on average 163.61111111111111) internal successors, (2945), 18 states have internal predecessors, (2945), 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 20:43:18,678 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:18,678 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 202 [2022-11-02 20:43:18,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:18,857 INFO L130 PetriNetUnfolder]: 0/182 cut-off events. [2022-11-02 20:43:18,857 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-02 20:43:18,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 182 events. 0/182 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 287 event pairs, 0 based on Foata normal form. 2/184 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-11-02 20:43:18,858 INFO L137 encePairwiseOnDemand]: 197/202 looper letters, 15 selfloop transitions, 13 changer transitions 0/168 dead transitions. [2022-11-02 20:43:18,859 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 168 transitions, 470 flow [2022-11-02 20:43:18,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-02 20:43:18,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-02 20:43:18,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2445 transitions. [2022-11-02 20:43:18,864 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.806930693069307 [2022-11-02 20:43:18,864 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2445 transitions. [2022-11-02 20:43:18,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2445 transitions. [2022-11-02 20:43:18,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:18,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2445 transitions. [2022-11-02 20:43:18,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 163.0) internal successors, (2445), 15 states have internal predecessors, (2445), 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 20:43:18,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 202.0) internal successors, (3232), 16 states have internal predecessors, (3232), 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 20:43:18,878 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 202.0) internal successors, (3232), 16 states have internal predecessors, (3232), 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 20:43:18,879 INFO L175 Difference]: Start difference. First operand has 184 places, 169 transitions, 404 flow. Second operand 15 states and 2445 transitions. [2022-11-02 20:43:18,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 168 transitions, 470 flow [2022-11-02 20:43:18,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 168 transitions, 453 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-11-02 20:43:18,883 INFO L231 Difference]: Finished difference. Result has 183 places, 161 transitions, 402 flow [2022-11-02 20:43:18,884 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=402, PETRI_PLACES=183, PETRI_TRANSITIONS=161} [2022-11-02 20:43:18,884 INFO L287 CegarLoopForPetriNet]: 183 programPoint places, 0 predicate places. [2022-11-02 20:43:18,885 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 161 transitions, 402 flow [2022-11-02 20:43:18,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 163.61111111111111) internal successors, (2945), 18 states have internal predecessors, (2945), 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 20:43:18,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:18,887 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:43:18,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:19,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:19,106 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:19,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:19,106 INFO L85 PathProgramCache]: Analyzing trace with hash -909920624, now seen corresponding path program 1 times [2022-11-02 20:43:19,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:19,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702219748] [2022-11-02 20:43:19,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:19,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:19,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:43:19,127 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:43:19,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:43:19,157 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:43:19,158 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:43:19,158 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:43:19,159 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:43:19,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-02 20:43:19,159 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-02 20:43:19,161 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:43:19,161 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-02 20:43:19,191 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:43:19,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 212 places, 235 transitions, 515 flow [2022-11-02 20:43:19,287 INFO L130 PetriNetUnfolder]: 54/410 cut-off events. [2022-11-02 20:43:19,288 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-02 20:43:19,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 441 conditions, 410 events. 54/410 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1311 event pairs, 0 based on Foata normal form. 0/344 useless extension candidates. Maximal degree in co-relation 354. Up to 12 conditions per place. [2022-11-02 20:43:19,293 INFO L82 GeneralOperation]: Start removeDead. Operand has 212 places, 235 transitions, 515 flow [2022-11-02 20:43:19,297 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 212 places, 235 transitions, 515 flow [2022-11-02 20:43:19,301 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:43:19,302 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;@4e0ca16a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:43:19,302 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:43:19,312 INFO L130 PetriNetUnfolder]: 5/82 cut-off events. [2022-11-02 20:43:19,312 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:43:19,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:19,312 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] [2022-11-02 20:43:19,312 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:19,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:19,313 INFO L85 PathProgramCache]: Analyzing trace with hash -492596318, now seen corresponding path program 1 times [2022-11-02 20:43:19,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:19,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88390966] [2022-11-02 20:43:19,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:19,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:19,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:19,365 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 20:43:19,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:19,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88390966] [2022-11-02 20:43:19,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88390966] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:43:19,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:43:19,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:43:19,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776231141] [2022-11-02 20:43:19,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:43:19,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:43:19,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:19,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:43:19,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:43:19,369 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 235 [2022-11-02 20:43:19,370 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 235 transitions, 515 flow. Second operand has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 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 20:43:19,370 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:19,370 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 235 [2022-11-02 20:43:19,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:19,468 INFO L130 PetriNetUnfolder]: 0/328 cut-off events. [2022-11-02 20:43:19,468 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-02 20:43:19,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 394 conditions, 328 events. 0/328 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1054 event pairs, 0 based on Foata normal form. 379/697 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2022-11-02 20:43:19,469 INFO L137 encePairwiseOnDemand]: 198/235 looper letters, 14 selfloop transitions, 2 changer transitions 11/204 dead transitions. [2022-11-02 20:43:19,470 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 204 transitions, 485 flow [2022-11-02 20:43:19,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:43:19,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:43:19,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 622 transitions. [2022-11-02 20:43:19,472 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8822695035460993 [2022-11-02 20:43:19,472 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 622 transitions. [2022-11-02 20:43:19,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 622 transitions. [2022-11-02 20:43:19,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:19,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 622 transitions. [2022-11-02 20:43:19,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 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 20:43:19,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 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 20:43:19,477 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 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 20:43:19,477 INFO L175 Difference]: Start difference. First operand has 212 places, 235 transitions, 515 flow. Second operand 3 states and 622 transitions. [2022-11-02 20:43:19,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 204 transitions, 485 flow [2022-11-02 20:43:19,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 204 transitions, 465 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-11-02 20:43:19,487 INFO L231 Difference]: Finished difference. Result has 214 places, 190 transitions, 415 flow [2022-11-02 20:43:19,488 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=415, PETRI_PLACES=214, PETRI_TRANSITIONS=190} [2022-11-02 20:43:19,489 INFO L287 CegarLoopForPetriNet]: 212 programPoint places, 2 predicate places. [2022-11-02 20:43:19,489 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 190 transitions, 415 flow [2022-11-02 20:43:19,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 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 20:43:19,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:19,490 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] [2022-11-02 20:43:19,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-02 20:43:19,490 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:19,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:19,491 INFO L85 PathProgramCache]: Analyzing trace with hash -16145834, now seen corresponding path program 1 times [2022-11-02 20:43:19,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:19,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678584891] [2022-11-02 20:43:19,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:19,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:19,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:19,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:19,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:19,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678584891] [2022-11-02 20:43:19,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678584891] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:19,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997643694] [2022-11-02 20:43:19,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:19,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:19,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:19,566 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:19,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:43:19,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:19,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:43:19,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:19,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:19,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:19,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:19,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997643694] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:43:19,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:43:19,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:43:19,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994871284] [2022-11-02 20:43:19,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:19,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:43:19,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:19,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:43:19,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:43:19,768 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 235 [2022-11-02 20:43:19,770 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 190 transitions, 415 flow. Second operand has 10 states, 10 states have (on average 189.3) internal successors, (1893), 10 states have internal predecessors, (1893), 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 20:43:19,770 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:19,770 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 235 [2022-11-02 20:43:19,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:19,914 INFO L130 PetriNetUnfolder]: 0/251 cut-off events. [2022-11-02 20:43:19,914 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-02 20:43:19,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 251 events. 0/251 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 582 event pairs, 0 based on Foata normal form. 2/253 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-11-02 20:43:19,916 INFO L137 encePairwiseOnDemand]: 229/235 looper letters, 15 selfloop transitions, 9 changer transitions 0/200 dead transitions. [2022-11-02 20:43:19,916 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 200 transitions, 485 flow [2022-11-02 20:43:19,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:43:19,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:43:19,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1709 transitions. [2022-11-02 20:43:19,920 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8080378250591016 [2022-11-02 20:43:19,920 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1709 transitions. [2022-11-02 20:43:19,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1709 transitions. [2022-11-02 20:43:19,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:19,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1709 transitions. [2022-11-02 20:43:19,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 189.88888888888889) internal successors, (1709), 9 states have internal predecessors, (1709), 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 20:43:19,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 235.0) internal successors, (2350), 10 states have internal predecessors, (2350), 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 20:43:19,930 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 235.0) internal successors, (2350), 10 states have internal predecessors, (2350), 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 20:43:19,930 INFO L175 Difference]: Start difference. First operand has 214 places, 190 transitions, 415 flow. Second operand 9 states and 1709 transitions. [2022-11-02 20:43:19,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 200 transitions, 485 flow [2022-11-02 20:43:19,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 200 transitions, 483 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:43:19,935 INFO L231 Difference]: Finished difference. Result has 213 places, 196 transitions, 463 flow [2022-11-02 20:43:19,935 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=463, PETRI_PLACES=213, PETRI_TRANSITIONS=196} [2022-11-02 20:43:19,936 INFO L287 CegarLoopForPetriNet]: 212 programPoint places, 1 predicate places. [2022-11-02 20:43:19,936 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 196 transitions, 463 flow [2022-11-02 20:43:19,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 189.3) internal successors, (1893), 10 states have internal predecessors, (1893), 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 20:43:19,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:19,937 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:19,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:20,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-02 20:43:20,159 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:20,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:20,159 INFO L85 PathProgramCache]: Analyzing trace with hash -2021107327, now seen corresponding path program 1 times [2022-11-02 20:43:20,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:20,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640504475] [2022-11-02 20:43:20,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:20,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:20,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:20,306 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:20,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:20,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640504475] [2022-11-02 20:43:20,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640504475] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:20,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300032785] [2022-11-02 20:43:20,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:20,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:20,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:20,308 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:20,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:43:20,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:20,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:43:20,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:20,489 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:20,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:20,618 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:20,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300032785] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:43:20,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:43:20,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:43:20,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377811237] [2022-11-02 20:43:20,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:20,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:43:20,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:20,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:43:20,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:43:20,625 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 235 [2022-11-02 20:43:20,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 196 transitions, 463 flow. Second operand has 18 states, 18 states have (on average 189.61111111111111) internal successors, (3413), 18 states have internal predecessors, (3413), 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 20:43:20,644 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:20,644 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 235 [2022-11-02 20:43:20,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:20,890 INFO L130 PetriNetUnfolder]: 0/218 cut-off events. [2022-11-02 20:43:20,891 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-11-02 20:43:20,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 218 events. 0/218 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 385 event pairs, 0 based on Foata normal form. 3/221 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-11-02 20:43:20,892 INFO L137 encePairwiseOnDemand]: 230/235 looper letters, 18 selfloop transitions, 16 changer transitions 0/200 dead transitions. [2022-11-02 20:43:20,892 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 200 transitions, 565 flow [2022-11-02 20:43:20,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 20:43:20,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-02 20:43:20,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3403 transitions. [2022-11-02 20:43:20,902 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8044917257683215 [2022-11-02 20:43:20,902 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3403 transitions. [2022-11-02 20:43:20,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3403 transitions. [2022-11-02 20:43:20,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:20,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3403 transitions. [2022-11-02 20:43:20,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 189.05555555555554) internal successors, (3403), 18 states have internal predecessors, (3403), 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 20:43:20,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 235.0) internal successors, (4465), 19 states have internal predecessors, (4465), 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 20:43:20,925 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 235.0) internal successors, (4465), 19 states have internal predecessors, (4465), 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 20:43:20,925 INFO L175 Difference]: Start difference. First operand has 213 places, 196 transitions, 463 flow. Second operand 18 states and 3403 transitions. [2022-11-02 20:43:20,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 200 transitions, 565 flow [2022-11-02 20:43:20,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 200 transitions, 544 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-11-02 20:43:20,931 INFO L231 Difference]: Finished difference. Result has 215 places, 191 transitions, 480 flow [2022-11-02 20:43:20,932 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=480, PETRI_PLACES=215, PETRI_TRANSITIONS=191} [2022-11-02 20:43:20,934 INFO L287 CegarLoopForPetriNet]: 212 programPoint places, 3 predicate places. [2022-11-02 20:43:20,934 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 191 transitions, 480 flow [2022-11-02 20:43:20,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 189.61111111111111) internal successors, (3413), 18 states have internal predecessors, (3413), 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 20:43:20,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:20,935 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:43:20,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:21,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-02 20:43:21,151 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:21,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:21,151 INFO L85 PathProgramCache]: Analyzing trace with hash -30972408, now seen corresponding path program 1 times [2022-11-02 20:43:21,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:21,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239460474] [2022-11-02 20:43:21,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:21,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:21,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:43:21,192 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:43:21,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:43:21,232 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:43:21,232 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:43:21,232 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:43:21,233 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:43:21,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-02 20:43:21,233 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-02 20:43:21,234 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:43:21,234 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-11-02 20:43:21,270 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:43:21,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 241 places, 268 transitions, 596 flow [2022-11-02 20:43:21,358 INFO L130 PetriNetUnfolder]: 64/479 cut-off events. [2022-11-02 20:43:21,358 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-02 20:43:21,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 519 conditions, 479 events. 64/479 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1583 event pairs, 0 based on Foata normal form. 0/401 useless extension candidates. Maximal degree in co-relation 429. Up to 14 conditions per place. [2022-11-02 20:43:21,368 INFO L82 GeneralOperation]: Start removeDead. Operand has 241 places, 268 transitions, 596 flow [2022-11-02 20:43:21,374 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 241 places, 268 transitions, 596 flow [2022-11-02 20:43:21,375 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:43:21,376 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;@4e0ca16a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:43:21,376 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:43:21,382 INFO L130 PetriNetUnfolder]: 5/80 cut-off events. [2022-11-02 20:43:21,382 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:43:21,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:21,383 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] [2022-11-02 20:43:21,383 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:21,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:21,384 INFO L85 PathProgramCache]: Analyzing trace with hash 427631073, now seen corresponding path program 1 times [2022-11-02 20:43:21,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:21,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966182833] [2022-11-02 20:43:21,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:21,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:21,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:21,404 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 20:43:21,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:21,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966182833] [2022-11-02 20:43:21,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966182833] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:43:21,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:43:21,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:43:21,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047715579] [2022-11-02 20:43:21,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:43:21,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:43:21,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:21,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:43:21,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:43:21,408 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 268 [2022-11-02 20:43:21,408 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 268 transitions, 596 flow. Second operand has 2 states, 2 states have (on average 221.5) internal successors, (443), 2 states have internal predecessors, (443), 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 20:43:21,409 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:21,409 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 268 [2022-11-02 20:43:21,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:21,520 INFO L130 PetriNetUnfolder]: 0/408 cut-off events. [2022-11-02 20:43:21,521 INFO L131 PetriNetUnfolder]: For 71/71 co-relation queries the response was YES. [2022-11-02 20:43:21,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 455 conditions, 408 events. 0/408 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1401 event pairs, 0 based on Foata normal form. 126/520 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-11-02 20:43:21,522 INFO L137 encePairwiseOnDemand]: 228/268 looper letters, 6 selfloop transitions, 0 changer transitions 11/227 dead transitions. [2022-11-02 20:43:21,522 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 227 transitions, 526 flow [2022-11-02 20:43:21,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:43:21,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:43:21,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 488 transitions. [2022-11-02 20:43:21,528 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9104477611940298 [2022-11-02 20:43:21,528 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 488 transitions. [2022-11-02 20:43:21,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 488 transitions. [2022-11-02 20:43:21,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:21,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 488 transitions. [2022-11-02 20:43:21,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 244.0) internal successors, (488), 2 states have internal predecessors, (488), 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 20:43:21,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 268.0) internal successors, (804), 3 states have internal predecessors, (804), 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 20:43:21,532 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 268.0) internal successors, (804), 3 states have internal predecessors, (804), 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 20:43:21,532 INFO L175 Difference]: Start difference. First operand has 241 places, 268 transitions, 596 flow. Second operand 2 states and 488 transitions. [2022-11-02 20:43:21,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 227 transitions, 526 flow [2022-11-02 20:43:21,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 227 transitions, 496 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-11-02 20:43:21,537 INFO L231 Difference]: Finished difference. Result has 241 places, 216 transitions, 462 flow [2022-11-02 20:43:21,538 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=484, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=462, PETRI_PLACES=241, PETRI_TRANSITIONS=216} [2022-11-02 20:43:21,538 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, 0 predicate places. [2022-11-02 20:43:21,538 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 216 transitions, 462 flow [2022-11-02 20:43:21,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 221.5) internal successors, (443), 2 states have internal predecessors, (443), 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 20:43:21,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:21,539 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] [2022-11-02 20:43:21,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-02 20:43:21,539 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:21,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:21,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1369320286, now seen corresponding path program 1 times [2022-11-02 20:43:21,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:21,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311766847] [2022-11-02 20:43:21,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:21,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:21,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:21,571 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 20:43:21,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:21,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311766847] [2022-11-02 20:43:21,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311766847] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:43:21,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:43:21,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:43:21,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719087472] [2022-11-02 20:43:21,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:43:21,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:43:21,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:21,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:43:21,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:43:21,575 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 268 [2022-11-02 20:43:21,576 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 216 transitions, 462 flow. Second operand has 3 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 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 20:43:21,576 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:21,576 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 268 [2022-11-02 20:43:21,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:21,667 INFO L130 PetriNetUnfolder]: 0/320 cut-off events. [2022-11-02 20:43:21,667 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-02 20:43:21,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 320 events. 0/320 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 881 event pairs, 0 based on Foata normal form. 0/314 useless extension candidates. Maximal degree in co-relation 0. Up to 36 conditions per place. [2022-11-02 20:43:21,669 INFO L137 encePairwiseOnDemand]: 265/268 looper letters, 15 selfloop transitions, 2 changer transitions 0/220 dead transitions. [2022-11-02 20:43:21,669 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 220 transitions, 504 flow [2022-11-02 20:43:21,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:43:21,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:43:21,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 660 transitions. [2022-11-02 20:43:21,672 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8208955223880597 [2022-11-02 20:43:21,672 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 660 transitions. [2022-11-02 20:43:21,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 660 transitions. [2022-11-02 20:43:21,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:21,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 660 transitions. [2022-11-02 20:43:21,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 220.0) internal successors, (660), 3 states have internal predecessors, (660), 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 20:43:21,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 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 20:43:21,676 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 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 20:43:21,676 INFO L175 Difference]: Start difference. First operand has 241 places, 216 transitions, 462 flow. Second operand 3 states and 660 transitions. [2022-11-02 20:43:21,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 220 transitions, 504 flow [2022-11-02 20:43:21,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 220 transitions, 504 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:43:21,682 INFO L231 Difference]: Finished difference. Result has 233 places, 217 transitions, 474 flow [2022-11-02 20:43:21,682 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=474, PETRI_PLACES=233, PETRI_TRANSITIONS=217} [2022-11-02 20:43:21,683 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, -8 predicate places. [2022-11-02 20:43:21,683 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 217 transitions, 474 flow [2022-11-02 20:43:21,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 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 20:43:21,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:21,684 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] [2022-11-02 20:43:21,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-02 20:43:21,684 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:21,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:21,685 INFO L85 PathProgramCache]: Analyzing trace with hash -910210314, now seen corresponding path program 1 times [2022-11-02 20:43:21,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:21,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302803621] [2022-11-02 20:43:21,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:21,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:21,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:21,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:21,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:21,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302803621] [2022-11-02 20:43:21,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302803621] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:21,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370485162] [2022-11-02 20:43:21,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:21,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:21,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:21,746 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:21,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:43:21,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:21,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:43:21,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:21,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:21,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:21,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:21,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370485162] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:43:21,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:43:21,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:43:21,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192430737] [2022-11-02 20:43:21,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:21,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:43:21,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:21,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:43:21,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:43:21,938 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 268 [2022-11-02 20:43:21,940 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 217 transitions, 474 flow. Second operand has 10 states, 10 states have (on average 215.3) internal successors, (2153), 10 states have internal predecessors, (2153), 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 20:43:21,940 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:21,940 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 268 [2022-11-02 20:43:21,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:22,088 INFO L130 PetriNetUnfolder]: 0/298 cut-off events. [2022-11-02 20:43:22,089 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-02 20:43:22,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 383 conditions, 298 events. 0/298 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 753 event pairs, 0 based on Foata normal form. 2/300 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-11-02 20:43:22,108 INFO L137 encePairwiseOnDemand]: 262/268 looper letters, 16 selfloop transitions, 9 changer transitions 0/227 dead transitions. [2022-11-02 20:43:22,108 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 227 transitions, 546 flow [2022-11-02 20:43:22,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:43:22,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:43:22,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1944 transitions. [2022-11-02 20:43:22,115 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8059701492537313 [2022-11-02 20:43:22,115 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1944 transitions. [2022-11-02 20:43:22,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1944 transitions. [2022-11-02 20:43:22,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:22,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1944 transitions. [2022-11-02 20:43:22,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 216.0) internal successors, (1944), 9 states have internal predecessors, (1944), 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 20:43:22,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 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 20:43:22,126 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 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 20:43:22,126 INFO L175 Difference]: Start difference. First operand has 233 places, 217 transitions, 474 flow. Second operand 9 states and 1944 transitions. [2022-11-02 20:43:22,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 227 transitions, 546 flow [2022-11-02 20:43:22,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 227 transitions, 544 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:43:22,131 INFO L231 Difference]: Finished difference. Result has 243 places, 223 transitions, 522 flow [2022-11-02 20:43:22,132 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=522, PETRI_PLACES=243, PETRI_TRANSITIONS=223} [2022-11-02 20:43:22,132 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, 2 predicate places. [2022-11-02 20:43:22,132 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 223 transitions, 522 flow [2022-11-02 20:43:22,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 215.3) internal successors, (2153), 10 states have internal predecessors, (2153), 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 20:43:22,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:22,133 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:22,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:22,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:22,359 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:22,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:22,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1557677727, now seen corresponding path program 1 times [2022-11-02 20:43:22,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:22,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389132383] [2022-11-02 20:43:22,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:22,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:22,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:22,491 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:22,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:22,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389132383] [2022-11-02 20:43:22,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389132383] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:22,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531616997] [2022-11-02 20:43:22,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:22,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:22,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:22,494 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:22,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:43:22,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:22,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:43:22,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:22,697 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:22,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:22,814 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:22,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531616997] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:43:22,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:43:22,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:43:22,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036574385] [2022-11-02 20:43:22,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:22,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:43:22,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:22,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:43:22,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:43:22,821 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 268 [2022-11-02 20:43:22,824 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 223 transitions, 522 flow. Second operand has 18 states, 18 states have (on average 215.61111111111111) internal successors, (3881), 18 states have internal predecessors, (3881), 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 20:43:22,825 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:22,825 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 268 [2022-11-02 20:43:22,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:23,088 INFO L130 PetriNetUnfolder]: 0/254 cut-off events. [2022-11-02 20:43:23,089 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-02 20:43:23,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 368 conditions, 254 events. 0/254 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 483 event pairs, 0 based on Foata normal form. 4/258 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2022-11-02 20:43:23,090 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 21 selfloop transitions, 19 changer transitions 0/232 dead transitions. [2022-11-02 20:43:23,090 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 232 transitions, 660 flow [2022-11-02 20:43:23,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:43:23,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:43:23,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4517 transitions. [2022-11-02 20:43:23,097 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8025941719971571 [2022-11-02 20:43:23,097 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4517 transitions. [2022-11-02 20:43:23,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4517 transitions. [2022-11-02 20:43:23,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:23,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4517 transitions. [2022-11-02 20:43:23,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 215.0952380952381) internal successors, (4517), 21 states have internal predecessors, (4517), 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 20:43:23,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 268.0) internal successors, (5896), 22 states have internal predecessors, (5896), 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 20:43:23,117 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 268.0) internal successors, (5896), 22 states have internal predecessors, (5896), 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 20:43:23,118 INFO L175 Difference]: Start difference. First operand has 243 places, 223 transitions, 522 flow. Second operand 21 states and 4517 transitions. [2022-11-02 20:43:23,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 232 transitions, 660 flow [2022-11-02 20:43:23,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 232 transitions, 635 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-11-02 20:43:23,156 INFO L231 Difference]: Finished difference. Result has 248 places, 221 transitions, 558 flow [2022-11-02 20:43:23,156 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=481, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=558, PETRI_PLACES=248, PETRI_TRANSITIONS=221} [2022-11-02 20:43:23,157 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, 7 predicate places. [2022-11-02 20:43:23,157 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 221 transitions, 558 flow [2022-11-02 20:43:23,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 215.61111111111111) internal successors, (3881), 18 states have internal predecessors, (3881), 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 20:43:23,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:23,159 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:43:23,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:23,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-02 20:43:23,367 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:23,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:23,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1257008543, now seen corresponding path program 1 times [2022-11-02 20:43:23,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:23,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826436214] [2022-11-02 20:43:23,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:23,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:23,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:43:23,405 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:43:23,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:43:23,427 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:43:23,427 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:43:23,427 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:43:23,428 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:43:23,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-02 20:43:23,428 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-02 20:43:23,429 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:43:23,429 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-11-02 20:43:23,458 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:43:23,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 270 places, 301 transitions, 679 flow [2022-11-02 20:43:23,564 INFO L130 PetriNetUnfolder]: 74/548 cut-off events. [2022-11-02 20:43:23,564 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-11-02 20:43:23,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 598 conditions, 548 events. 74/548 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1841 event pairs, 0 based on Foata normal form. 0/458 useless extension candidates. Maximal degree in co-relation 505. Up to 16 conditions per place. [2022-11-02 20:43:23,578 INFO L82 GeneralOperation]: Start removeDead. Operand has 270 places, 301 transitions, 679 flow [2022-11-02 20:43:23,585 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 270 places, 301 transitions, 679 flow [2022-11-02 20:43:23,586 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:43:23,587 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;@4e0ca16a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:43:23,587 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:43:23,593 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-02 20:43:23,593 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:43:23,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:23,593 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] [2022-11-02 20:43:23,594 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:23,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:23,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1975059873, now seen corresponding path program 1 times [2022-11-02 20:43:23,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:23,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630069756] [2022-11-02 20:43:23,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:23,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:23,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:23,611 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 20:43:23,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:23,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630069756] [2022-11-02 20:43:23,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630069756] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:43:23,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:43:23,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:43:23,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353578361] [2022-11-02 20:43:23,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:43:23,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:43:23,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:23,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:43:23,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:43:23,614 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 301 [2022-11-02 20:43:23,614 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 301 transitions, 679 flow. Second operand has 2 states, 2 states have (on average 247.5) internal successors, (495), 2 states have internal predecessors, (495), 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 20:43:23,614 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:23,615 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 301 [2022-11-02 20:43:23,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:23,759 INFO L130 PetriNetUnfolder]: 0/466 cut-off events. [2022-11-02 20:43:23,759 INFO L131 PetriNetUnfolder]: For 105/105 co-relation queries the response was YES. [2022-11-02 20:43:23,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 524 conditions, 466 events. 0/466 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1649 event pairs, 0 based on Foata normal form. 166/616 useless extension candidates. Maximal degree in co-relation 0. Up to 8 conditions per place. [2022-11-02 20:43:23,764 INFO L137 encePairwiseOnDemand]: 255/301 looper letters, 7 selfloop transitions, 0 changer transitions 11/254 dead transitions. [2022-11-02 20:43:23,764 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 254 transitions, 599 flow [2022-11-02 20:43:23,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:43:23,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:43:23,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 547 transitions. [2022-11-02 20:43:23,766 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9086378737541528 [2022-11-02 20:43:23,767 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 547 transitions. [2022-11-02 20:43:23,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 547 transitions. [2022-11-02 20:43:23,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:23,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 547 transitions. [2022-11-02 20:43:23,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 273.5) internal successors, (547), 2 states have internal predecessors, (547), 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 20:43:23,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 301.0) internal successors, (903), 3 states have internal predecessors, (903), 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 20:43:23,770 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 301.0) internal successors, (903), 3 states have internal predecessors, (903), 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 20:43:23,771 INFO L175 Difference]: Start difference. First operand has 270 places, 301 transitions, 679 flow. Second operand 2 states and 547 transitions. [2022-11-02 20:43:23,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 254 transitions, 599 flow [2022-11-02 20:43:23,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 254 transitions, 557 flow, removed 21 selfloop flow, removed 0 redundant places. [2022-11-02 20:43:23,777 INFO L231 Difference]: Finished difference. Result has 270 places, 243 transitions, 521 flow [2022-11-02 20:43:23,777 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=543, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=521, PETRI_PLACES=270, PETRI_TRANSITIONS=243} [2022-11-02 20:43:23,778 INFO L287 CegarLoopForPetriNet]: 270 programPoint places, 0 predicate places. [2022-11-02 20:43:23,778 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 243 transitions, 521 flow [2022-11-02 20:43:23,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 247.5) internal successors, (495), 2 states have internal predecessors, (495), 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 20:43:23,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:23,779 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] [2022-11-02 20:43:23,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-02 20:43:23,779 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:23,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:23,780 INFO L85 PathProgramCache]: Analyzing trace with hash 178108514, now seen corresponding path program 1 times [2022-11-02 20:43:23,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:23,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480806007] [2022-11-02 20:43:23,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:23,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:23,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:23,815 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 20:43:23,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:23,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480806007] [2022-11-02 20:43:23,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480806007] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:43:23,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:43:23,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:43:23,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434888472] [2022-11-02 20:43:23,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:43:23,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:43:23,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:23,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:43:23,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:43:23,819 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 301 [2022-11-02 20:43:23,820 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 243 transitions, 521 flow. Second operand has 3 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 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 20:43:23,820 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:23,820 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 301 [2022-11-02 20:43:23,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:23,955 INFO L130 PetriNetUnfolder]: 0/367 cut-off events. [2022-11-02 20:43:23,955 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-02 20:43:23,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 444 conditions, 367 events. 0/367 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1051 event pairs, 0 based on Foata normal form. 0/360 useless extension candidates. Maximal degree in co-relation 0. Up to 42 conditions per place. [2022-11-02 20:43:23,957 INFO L137 encePairwiseOnDemand]: 298/301 looper letters, 16 selfloop transitions, 2 changer transitions 0/247 dead transitions. [2022-11-02 20:43:23,957 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 247 transitions, 565 flow [2022-11-02 20:43:23,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:43:23,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:43:23,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 739 transitions. [2022-11-02 20:43:23,959 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8183831672203765 [2022-11-02 20:43:23,959 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 739 transitions. [2022-11-02 20:43:23,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 739 transitions. [2022-11-02 20:43:23,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:23,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 739 transitions. [2022-11-02 20:43:23,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 246.33333333333334) internal successors, (739), 3 states have internal predecessors, (739), 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 20:43:23,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 301.0) internal successors, (1204), 4 states have internal predecessors, (1204), 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 20:43:23,963 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 301.0) internal successors, (1204), 4 states have internal predecessors, (1204), 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 20:43:23,963 INFO L175 Difference]: Start difference. First operand has 270 places, 243 transitions, 521 flow. Second operand 3 states and 739 transitions. [2022-11-02 20:43:23,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 247 transitions, 565 flow [2022-11-02 20:43:23,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 247 transitions, 565 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:43:23,969 INFO L231 Difference]: Finished difference. Result has 262 places, 244 transitions, 533 flow [2022-11-02 20:43:23,969 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=533, PETRI_PLACES=262, PETRI_TRANSITIONS=244} [2022-11-02 20:43:23,970 INFO L287 CegarLoopForPetriNet]: 270 programPoint places, -8 predicate places. [2022-11-02 20:43:23,970 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 244 transitions, 533 flow [2022-11-02 20:43:23,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 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 20:43:23,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:23,971 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] [2022-11-02 20:43:23,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-02 20:43:23,971 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:23,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:23,971 INFO L85 PathProgramCache]: Analyzing trace with hash -612046090, now seen corresponding path program 1 times [2022-11-02 20:43:23,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:23,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695057772] [2022-11-02 20:43:23,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:23,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:23,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:24,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:24,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:24,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695057772] [2022-11-02 20:43:24,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695057772] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:24,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435247430] [2022-11-02 20:43:24,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:24,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:24,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:24,033 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:24,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:43:24,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:24,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:43:24,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:24,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:24,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:24,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:24,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435247430] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:43:24,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:43:24,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:43:24,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103658892] [2022-11-02 20:43:24,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:24,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:43:24,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:24,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:43:24,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:43:24,236 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 301 [2022-11-02 20:43:24,238 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 244 transitions, 533 flow. Second operand has 10 states, 10 states have (on average 241.3) internal successors, (2413), 10 states have internal predecessors, (2413), 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 20:43:24,238 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:24,239 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 301 [2022-11-02 20:43:24,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:24,399 INFO L130 PetriNetUnfolder]: 0/345 cut-off events. [2022-11-02 20:43:24,399 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-11-02 20:43:24,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 443 conditions, 345 events. 0/345 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 920 event pairs, 0 based on Foata normal form. 2/347 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2022-11-02 20:43:24,400 INFO L137 encePairwiseOnDemand]: 295/301 looper letters, 17 selfloop transitions, 9 changer transitions 0/254 dead transitions. [2022-11-02 20:43:24,401 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 254 transitions, 607 flow [2022-11-02 20:43:24,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:43:24,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:43:24,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2179 transitions. [2022-11-02 20:43:24,404 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8043558508674787 [2022-11-02 20:43:24,405 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2179 transitions. [2022-11-02 20:43:24,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2179 transitions. [2022-11-02 20:43:24,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:24,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2179 transitions. [2022-11-02 20:43:24,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 242.11111111111111) internal successors, (2179), 9 states have internal predecessors, (2179), 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 20:43:24,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 301.0) internal successors, (3010), 10 states have internal predecessors, (3010), 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 20:43:24,414 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 301.0) internal successors, (3010), 10 states have internal predecessors, (3010), 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 20:43:24,414 INFO L175 Difference]: Start difference. First operand has 262 places, 244 transitions, 533 flow. Second operand 9 states and 2179 transitions. [2022-11-02 20:43:24,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 254 transitions, 607 flow [2022-11-02 20:43:24,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 254 transitions, 605 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:43:24,448 INFO L231 Difference]: Finished difference. Result has 272 places, 250 transitions, 581 flow [2022-11-02 20:43:24,448 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=581, PETRI_PLACES=272, PETRI_TRANSITIONS=250} [2022-11-02 20:43:24,448 INFO L287 CegarLoopForPetriNet]: 270 programPoint places, 2 predicate places. [2022-11-02 20:43:24,449 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 250 transitions, 581 flow [2022-11-02 20:43:24,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 241.3) internal successors, (2413), 10 states have internal predecessors, (2413), 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 20:43:24,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:24,450 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:24,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:24,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-02 20:43:24,650 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:24,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:24,651 INFO L85 PathProgramCache]: Analyzing trace with hash 289006049, now seen corresponding path program 1 times [2022-11-02 20:43:24,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:24,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240495602] [2022-11-02 20:43:24,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:24,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:24,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:24,774 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:24,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:24,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240495602] [2022-11-02 20:43:24,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240495602] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:24,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393561200] [2022-11-02 20:43:24,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:24,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:24,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:24,776 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:24,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:43:24,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:24,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:43:24,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:24,978 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:24,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:25,097 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:25,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393561200] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:43:25,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:43:25,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:43:25,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193215351] [2022-11-02 20:43:25,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:25,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:43:25,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:25,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:43:25,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:43:25,104 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 301 [2022-11-02 20:43:25,108 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 250 transitions, 581 flow. Second operand has 18 states, 18 states have (on average 241.61111111111111) internal successors, (4349), 18 states have internal predecessors, (4349), 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 20:43:25,108 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:25,108 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 301 [2022-11-02 20:43:25,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:25,412 INFO L130 PetriNetUnfolder]: 0/301 cut-off events. [2022-11-02 20:43:25,413 INFO L131 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-11-02 20:43:25,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 436 conditions, 301 events. 0/301 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 634 event pairs, 0 based on Foata normal form. 4/305 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-11-02 20:43:25,414 INFO L137 encePairwiseOnDemand]: 295/301 looper letters, 25 selfloop transitions, 21 changer transitions 0/274 dead transitions. [2022-11-02 20:43:25,414 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 274 transitions, 781 flow [2022-11-02 20:43:25,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:43:25,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:43:25,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5069 transitions. [2022-11-02 20:43:25,422 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8019300743553235 [2022-11-02 20:43:25,422 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5069 transitions. [2022-11-02 20:43:25,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5069 transitions. [2022-11-02 20:43:25,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:25,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5069 transitions. [2022-11-02 20:43:25,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 241.38095238095238) internal successors, (5069), 21 states have internal predecessors, (5069), 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 20:43:25,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 301.0) internal successors, (6622), 22 states have internal predecessors, (6622), 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 20:43:25,444 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 301.0) internal successors, (6622), 22 states have internal predecessors, (6622), 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 20:43:25,444 INFO L175 Difference]: Start difference. First operand has 272 places, 250 transitions, 581 flow. Second operand 21 states and 5069 transitions. [2022-11-02 20:43:25,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 274 transitions, 781 flow [2022-11-02 20:43:25,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 274 transitions, 767 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:43:25,451 INFO L231 Difference]: Finished difference. Result has 296 places, 263 transitions, 705 flow [2022-11-02 20:43:25,452 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=705, PETRI_PLACES=296, PETRI_TRANSITIONS=263} [2022-11-02 20:43:25,452 INFO L287 CegarLoopForPetriNet]: 270 programPoint places, 26 predicate places. [2022-11-02 20:43:25,452 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 263 transitions, 705 flow [2022-11-02 20:43:25,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 241.61111111111111) internal successors, (4349), 18 states have internal predecessors, (4349), 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 20:43:25,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:25,455 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:25,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:25,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-02 20:43:25,683 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:25,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:25,683 INFO L85 PathProgramCache]: Analyzing trace with hash -143485893, now seen corresponding path program 1 times [2022-11-02 20:43:25,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:25,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612987618] [2022-11-02 20:43:25,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:25,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:25,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:43:25,706 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:43:25,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:43:25,729 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:43:25,730 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:43:25,730 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:43:25,730 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:43:25,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-02 20:43:25,730 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-02 20:43:25,731 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:43:25,731 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2022-11-02 20:43:25,769 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:43:25,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 299 places, 334 transitions, 764 flow [2022-11-02 20:43:25,900 INFO L130 PetriNetUnfolder]: 84/617 cut-off events. [2022-11-02 20:43:25,900 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2022-11-02 20:43:25,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 678 conditions, 617 events. 84/617 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2107 event pairs, 0 based on Foata normal form. 0/515 useless extension candidates. Maximal degree in co-relation 582. Up to 18 conditions per place. [2022-11-02 20:43:25,914 INFO L82 GeneralOperation]: Start removeDead. Operand has 299 places, 334 transitions, 764 flow [2022-11-02 20:43:25,920 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 299 places, 334 transitions, 764 flow [2022-11-02 20:43:25,921 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:43:25,921 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;@4e0ca16a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:43:25,922 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:43:25,929 INFO L130 PetriNetUnfolder]: 4/79 cut-off events. [2022-11-02 20:43:25,929 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:43:25,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:25,930 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] [2022-11-02 20:43:25,930 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:25,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:25,930 INFO L85 PathProgramCache]: Analyzing trace with hash -145277214, now seen corresponding path program 1 times [2022-11-02 20:43:25,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:25,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969134599] [2022-11-02 20:43:25,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:25,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:25,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:25,960 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 20:43:25,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:25,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969134599] [2022-11-02 20:43:25,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969134599] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:43:25,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:43:25,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:43:25,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161597454] [2022-11-02 20:43:25,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:43:25,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:43:25,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:25,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:43:25,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:43:25,963 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 334 [2022-11-02 20:43:25,964 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 334 transitions, 764 flow. Second operand has 3 states, 3 states have (on average 267.0) internal successors, (801), 3 states have internal predecessors, (801), 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 20:43:25,964 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:25,965 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 334 [2022-11-02 20:43:25,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:26,135 INFO L130 PetriNetUnfolder]: 0/502 cut-off events. [2022-11-02 20:43:26,135 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2022-11-02 20:43:26,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 616 conditions, 502 events. 0/502 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1808 event pairs, 0 based on Foata normal form. 1024/1510 useless extension candidates. Maximal degree in co-relation 0. Up to 48 conditions per place. [2022-11-02 20:43:26,137 INFO L137 encePairwiseOnDemand]: 279/334 looper letters, 17 selfloop transitions, 2 changer transitions 11/285 dead transitions. [2022-11-02 20:43:26,137 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 285 transitions, 704 flow [2022-11-02 20:43:26,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:43:26,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:43:26,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 877 transitions. [2022-11-02 20:43:26,140 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.875249500998004 [2022-11-02 20:43:26,140 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 877 transitions. [2022-11-02 20:43:26,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 877 transitions. [2022-11-02 20:43:26,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:26,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 877 transitions. [2022-11-02 20:43:26,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 292.3333333333333) internal successors, (877), 3 states have internal predecessors, (877), 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 20:43:26,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 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 20:43:26,145 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 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 20:43:26,145 INFO L175 Difference]: Start difference. First operand has 299 places, 334 transitions, 764 flow. Second operand 3 states and 877 transitions. [2022-11-02 20:43:26,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 285 transitions, 704 flow [2022-11-02 20:43:26,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 285 transitions, 648 flow, removed 28 selfloop flow, removed 0 redundant places. [2022-11-02 20:43:26,151 INFO L231 Difference]: Finished difference. Result has 301 places, 271 transitions, 592 flow [2022-11-02 20:43:26,152 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=592, PETRI_PLACES=301, PETRI_TRANSITIONS=271} [2022-11-02 20:43:26,153 INFO L287 CegarLoopForPetriNet]: 299 programPoint places, 2 predicate places. [2022-11-02 20:43:26,154 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 271 transitions, 592 flow [2022-11-02 20:43:26,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 267.0) internal successors, (801), 3 states have internal predecessors, (801), 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 20:43:26,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:26,154 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] [2022-11-02 20:43:26,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-02 20:43:26,155 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:26,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:26,155 INFO L85 PathProgramCache]: Analyzing trace with hash 878346838, now seen corresponding path program 1 times [2022-11-02 20:43:26,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:26,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143691738] [2022-11-02 20:43:26,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:26,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:26,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:26,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:26,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:26,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143691738] [2022-11-02 20:43:26,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143691738] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:26,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569884306] [2022-11-02 20:43:26,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:26,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:26,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:26,215 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:26,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 20:43:26,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:26,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:43:26,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:26,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:26,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:26,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:26,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569884306] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:43:26,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:43:26,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:43:26,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647730684] [2022-11-02 20:43:26,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:26,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:43:26,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:26,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:43:26,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:43:26,455 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 334 [2022-11-02 20:43:26,458 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 271 transitions, 592 flow. Second operand has 10 states, 10 states have (on average 267.3) internal successors, (2673), 10 states have internal predecessors, (2673), 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 20:43:26,458 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:26,458 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 334 [2022-11-02 20:43:26,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:26,679 INFO L130 PetriNetUnfolder]: 0/392 cut-off events. [2022-11-02 20:43:26,679 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-02 20:43:26,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 502 conditions, 392 events. 0/392 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1098 event pairs, 0 based on Foata normal form. 2/394 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2022-11-02 20:43:26,681 INFO L137 encePairwiseOnDemand]: 328/334 looper letters, 18 selfloop transitions, 9 changer transitions 0/281 dead transitions. [2022-11-02 20:43:26,681 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 281 transitions, 668 flow [2022-11-02 20:43:26,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:43:26,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:43:26,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2414 transitions. [2022-11-02 20:43:26,689 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8030605455755156 [2022-11-02 20:43:26,689 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2414 transitions. [2022-11-02 20:43:26,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2414 transitions. [2022-11-02 20:43:26,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:26,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2414 transitions. [2022-11-02 20:43:26,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 268.22222222222223) internal successors, (2414), 9 states have internal predecessors, (2414), 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 20:43:26,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 334.0) internal successors, (3340), 10 states have internal predecessors, (3340), 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 20:43:26,700 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 334.0) internal successors, (3340), 10 states have internal predecessors, (3340), 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 20:43:26,701 INFO L175 Difference]: Start difference. First operand has 301 places, 271 transitions, 592 flow. Second operand 9 states and 2414 transitions. [2022-11-02 20:43:26,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 281 transitions, 668 flow [2022-11-02 20:43:26,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 281 transitions, 666 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:43:26,707 INFO L231 Difference]: Finished difference. Result has 300 places, 277 transitions, 640 flow [2022-11-02 20:43:26,707 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=640, PETRI_PLACES=300, PETRI_TRANSITIONS=277} [2022-11-02 20:43:26,708 INFO L287 CegarLoopForPetriNet]: 299 programPoint places, 1 predicate places. [2022-11-02 20:43:26,708 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 277 transitions, 640 flow [2022-11-02 20:43:26,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 267.3) internal successors, (2673), 10 states have internal predecessors, (2673), 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 20:43:26,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:26,710 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:26,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:26,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:26,923 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:26,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:26,923 INFO L85 PathProgramCache]: Analyzing trace with hash -776023295, now seen corresponding path program 1 times [2022-11-02 20:43:26,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:26,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903354214] [2022-11-02 20:43:26,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:26,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:26,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:27,047 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:27,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:27,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903354214] [2022-11-02 20:43:27,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903354214] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:27,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263542511] [2022-11-02 20:43:27,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:27,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:27,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:27,050 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:27,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 20:43:27,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:27,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:43:27,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:27,278 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:27,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:27,401 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:27,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263542511] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:43:27,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:43:27,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:43:27,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2949587] [2022-11-02 20:43:27,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:27,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:43:27,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:27,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:43:27,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:43:27,409 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 334 [2022-11-02 20:43:27,414 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 277 transitions, 640 flow. Second operand has 18 states, 18 states have (on average 267.6111111111111) internal successors, (4817), 18 states have internal predecessors, (4817), 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 20:43:27,414 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:27,414 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 334 [2022-11-02 20:43:27,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:27,728 INFO L130 PetriNetUnfolder]: 0/348 cut-off events. [2022-11-02 20:43:27,728 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-11-02 20:43:27,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 503 conditions, 348 events. 0/348 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 804 event pairs, 0 based on Foata normal form. 4/352 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-11-02 20:43:27,730 INFO L137 encePairwiseOnDemand]: 328/334 looper letters, 26 selfloop transitions, 21 changer transitions 0/301 dead transitions. [2022-11-02 20:43:27,730 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 301 transitions, 842 flow [2022-11-02 20:43:27,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:43:27,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:43:27,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5616 transitions. [2022-11-02 20:43:27,738 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8006843455945253 [2022-11-02 20:43:27,738 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5616 transitions. [2022-11-02 20:43:27,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5616 transitions. [2022-11-02 20:43:27,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:27,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5616 transitions. [2022-11-02 20:43:27,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 267.42857142857144) internal successors, (5616), 21 states have internal predecessors, (5616), 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 20:43:27,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 334.0) internal successors, (7348), 22 states have internal predecessors, (7348), 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 20:43:27,761 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 334.0) internal successors, (7348), 22 states have internal predecessors, (7348), 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 20:43:27,762 INFO L175 Difference]: Start difference. First operand has 300 places, 277 transitions, 640 flow. Second operand 21 states and 5616 transitions. [2022-11-02 20:43:27,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 301 transitions, 842 flow [2022-11-02 20:43:27,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 301 transitions, 828 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:43:27,769 INFO L231 Difference]: Finished difference. Result has 324 places, 290 transitions, 764 flow [2022-11-02 20:43:27,769 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=634, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=764, PETRI_PLACES=324, PETRI_TRANSITIONS=290} [2022-11-02 20:43:27,771 INFO L287 CegarLoopForPetriNet]: 299 programPoint places, 25 predicate places. [2022-11-02 20:43:27,771 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 290 transitions, 764 flow [2022-11-02 20:43:27,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 267.6111111111111) internal successors, (4817), 18 states have internal predecessors, (4817), 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 20:43:27,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:27,773 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:27,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:27,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:27,998 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:27,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:27,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1408771997, now seen corresponding path program 1 times [2022-11-02 20:43:27,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:27,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813296367] [2022-11-02 20:43:27,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:27,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:28,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:28,337 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:28,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:28,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813296367] [2022-11-02 20:43:28,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813296367] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:28,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099914285] [2022-11-02 20:43:28,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:28,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:28,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:28,339 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:28,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 20:43:28,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:28,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:43:28,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:28,690 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:28,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:29,087 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:29,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099914285] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:43:29,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:43:29,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-02 20:43:29,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098565826] [2022-11-02 20:43:29,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:29,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:43:29,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:29,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:43:29,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:43:29,100 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 334 [2022-11-02 20:43:29,111 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 290 transitions, 764 flow. Second operand has 34 states, 34 states have (on average 267.79411764705884) internal successors, (9105), 34 states have internal predecessors, (9105), 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 20:43:29,111 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:29,111 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 334 [2022-11-02 20:43:29,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:29,563 INFO L130 PetriNetUnfolder]: 0/326 cut-off events. [2022-11-02 20:43:29,563 INFO L131 PetriNetUnfolder]: For 87/87 co-relation queries the response was YES. [2022-11-02 20:43:29,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 509 conditions, 326 events. 0/326 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 679 event pairs, 0 based on Foata normal form. 2/328 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-11-02 20:43:29,565 INFO L137 encePairwiseOnDemand]: 329/334 looper letters, 27 selfloop transitions, 25 changer transitions 0/296 dead transitions. [2022-11-02 20:43:29,565 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 296 transitions, 912 flow [2022-11-02 20:43:29,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-02 20:43:29,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-02 20:43:29,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 7209 transitions. [2022-11-02 20:43:29,574 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7994011976047904 [2022-11-02 20:43:29,575 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 7209 transitions. [2022-11-02 20:43:29,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 7209 transitions. [2022-11-02 20:43:29,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:29,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 7209 transitions. [2022-11-02 20:43:29,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 267.0) internal successors, (7209), 27 states have internal predecessors, (7209), 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 20:43:29,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 334.0) internal successors, (9352), 28 states have internal predecessors, (9352), 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 20:43:29,602 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 334.0) internal successors, (9352), 28 states have internal predecessors, (9352), 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 20:43:29,602 INFO L175 Difference]: Start difference. First operand has 324 places, 290 transitions, 764 flow. Second operand 27 states and 7209 transitions. [2022-11-02 20:43:29,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 296 transitions, 912 flow [2022-11-02 20:43:29,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 296 transitions, 858 flow, removed 7 selfloop flow, removed 13 redundant places. [2022-11-02 20:43:29,610 INFO L231 Difference]: Finished difference. Result has 326 places, 282 transitions, 751 flow [2022-11-02 20:43:29,610 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=683, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=751, PETRI_PLACES=326, PETRI_TRANSITIONS=282} [2022-11-02 20:43:29,611 INFO L287 CegarLoopForPetriNet]: 299 programPoint places, 27 predicate places. [2022-11-02 20:43:29,611 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 282 transitions, 751 flow [2022-11-02 20:43:29,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 267.79411764705884) internal successors, (9105), 34 states have internal predecessors, (9105), 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 20:43:29,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:29,613 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:43:29,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:29,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:29,823 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:29,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:29,823 INFO L85 PathProgramCache]: Analyzing trace with hash 22455350, now seen corresponding path program 1 times [2022-11-02 20:43:29,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:29,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847808066] [2022-11-02 20:43:29,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:29,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:29,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:43:29,847 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:43:29,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:43:29,879 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:43:29,880 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:43:29,880 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:43:29,880 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:43:29,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-02 20:43:29,881 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-02 20:43:29,881 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:43:29,881 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2022-11-02 20:43:29,916 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:43:29,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 328 places, 367 transitions, 851 flow [2022-11-02 20:43:30,086 INFO L130 PetriNetUnfolder]: 94/686 cut-off events. [2022-11-02 20:43:30,086 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2022-11-02 20:43:30,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 759 conditions, 686 events. 94/686 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2348 event pairs, 0 based on Foata normal form. 0/572 useless extension candidates. Maximal degree in co-relation 660. Up to 20 conditions per place. [2022-11-02 20:43:30,105 INFO L82 GeneralOperation]: Start removeDead. Operand has 328 places, 367 transitions, 851 flow [2022-11-02 20:43:30,113 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 328 places, 367 transitions, 851 flow [2022-11-02 20:43:30,114 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:43:30,115 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;@4e0ca16a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:43:30,116 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:43:30,121 INFO L130 PetriNetUnfolder]: 3/77 cut-off events. [2022-11-02 20:43:30,121 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:43:30,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:30,122 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] [2022-11-02 20:43:30,122 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:30,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:30,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1955489826, now seen corresponding path program 1 times [2022-11-02 20:43:30,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:30,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395837421] [2022-11-02 20:43:30,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:30,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:30,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:30,148 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 20:43:30,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:30,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395837421] [2022-11-02 20:43:30,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395837421] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:43:30,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:43:30,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:43:30,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320491934] [2022-11-02 20:43:30,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:43:30,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:43:30,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:30,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:43:30,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:43:30,153 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 292 out of 367 [2022-11-02 20:43:30,154 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 367 transitions, 851 flow. Second operand has 3 states, 3 states have (on average 293.0) internal successors, (879), 3 states have internal predecessors, (879), 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 20:43:30,154 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:30,154 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 292 of 367 [2022-11-02 20:43:30,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:30,344 INFO L130 PetriNetUnfolder]: 0/560 cut-off events. [2022-11-02 20:43:30,345 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2022-11-02 20:43:30,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 692 conditions, 560 events. 0/560 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 2050 event pairs, 0 based on Foata normal form. 1312/1854 useless extension candidates. Maximal degree in co-relation 0. Up to 54 conditions per place. [2022-11-02 20:43:30,347 INFO L137 encePairwiseOnDemand]: 306/367 looper letters, 18 selfloop transitions, 2 changer transitions 11/312 dead transitions. [2022-11-02 20:43:30,347 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 312 transitions, 781 flow [2022-11-02 20:43:30,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:43:30,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:43:30,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 962 transitions. [2022-11-02 20:43:30,350 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8737511353315168 [2022-11-02 20:43:30,350 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 962 transitions. [2022-11-02 20:43:30,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 962 transitions. [2022-11-02 20:43:30,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:30,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 962 transitions. [2022-11-02 20:43:30,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 320.6666666666667) internal successors, (962), 3 states have internal predecessors, (962), 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 20:43:30,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 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 20:43:30,355 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 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 20:43:30,355 INFO L175 Difference]: Start difference. First operand has 328 places, 367 transitions, 851 flow. Second operand 3 states and 962 transitions. [2022-11-02 20:43:30,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 312 transitions, 781 flow [2022-11-02 20:43:30,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 312 transitions, 709 flow, removed 36 selfloop flow, removed 0 redundant places. [2022-11-02 20:43:30,362 INFO L231 Difference]: Finished difference. Result has 330 places, 298 transitions, 651 flow [2022-11-02 20:43:30,363 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=661, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=651, PETRI_PLACES=330, PETRI_TRANSITIONS=298} [2022-11-02 20:43:30,363 INFO L287 CegarLoopForPetriNet]: 328 programPoint places, 2 predicate places. [2022-11-02 20:43:30,364 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 298 transitions, 651 flow [2022-11-02 20:43:30,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 293.0) internal successors, (879), 3 states have internal predecessors, (879), 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 20:43:30,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:30,364 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] [2022-11-02 20:43:30,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-11-02 20:43:30,365 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:30,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:30,365 INFO L85 PathProgramCache]: Analyzing trace with hash -733998826, now seen corresponding path program 1 times [2022-11-02 20:43:30,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:30,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034353273] [2022-11-02 20:43:30,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:30,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:30,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:30,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:30,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:30,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034353273] [2022-11-02 20:43:30,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034353273] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:30,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688057904] [2022-11-02 20:43:30,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:30,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:30,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:30,423 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:30,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-02 20:43:30,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:30,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:43:30,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:30,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:30,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:30,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:30,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688057904] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:43:30,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:43:30,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:43:30,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882845348] [2022-11-02 20:43:30,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:30,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:43:30,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:30,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:43:30,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:43:30,666 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 367 [2022-11-02 20:43:30,668 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 298 transitions, 651 flow. Second operand has 10 states, 10 states have (on average 293.3) internal successors, (2933), 10 states have internal predecessors, (2933), 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 20:43:30,669 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:30,669 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 367 [2022-11-02 20:43:30,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:30,894 INFO L130 PetriNetUnfolder]: 0/439 cut-off events. [2022-11-02 20:43:30,894 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-02 20:43:30,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 562 conditions, 439 events. 0/439 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1262 event pairs, 0 based on Foata normal form. 2/441 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2022-11-02 20:43:30,895 INFO L137 encePairwiseOnDemand]: 361/367 looper letters, 19 selfloop transitions, 9 changer transitions 0/308 dead transitions. [2022-11-02 20:43:30,896 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 308 transitions, 729 flow [2022-11-02 20:43:30,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:43:30,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:43:30,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2649 transitions. [2022-11-02 20:43:30,900 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8019981834695731 [2022-11-02 20:43:30,900 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2649 transitions. [2022-11-02 20:43:30,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2649 transitions. [2022-11-02 20:43:30,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:30,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2649 transitions. [2022-11-02 20:43:30,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 294.3333333333333) internal successors, (2649), 9 states have internal predecessors, (2649), 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 20:43:30,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 367.0) internal successors, (3670), 10 states have internal predecessors, (3670), 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 20:43:30,911 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 367.0) internal successors, (3670), 10 states have internal predecessors, (3670), 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 20:43:30,911 INFO L175 Difference]: Start difference. First operand has 330 places, 298 transitions, 651 flow. Second operand 9 states and 2649 transitions. [2022-11-02 20:43:30,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 308 transitions, 729 flow [2022-11-02 20:43:30,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 308 transitions, 727 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:43:30,918 INFO L231 Difference]: Finished difference. Result has 329 places, 304 transitions, 699 flow [2022-11-02 20:43:30,919 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=649, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=699, PETRI_PLACES=329, PETRI_TRANSITIONS=304} [2022-11-02 20:43:30,919 INFO L287 CegarLoopForPetriNet]: 328 programPoint places, 1 predicate places. [2022-11-02 20:43:30,919 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 304 transitions, 699 flow [2022-11-02 20:43:30,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 293.3) internal successors, (2933), 10 states have internal predecessors, (2933), 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 20:43:30,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:30,920 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:30,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:31,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-02 20:43:31,143 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:31,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:31,143 INFO L85 PathProgramCache]: Analyzing trace with hash -457798463, now seen corresponding path program 1 times [2022-11-02 20:43:31,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:31,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79590507] [2022-11-02 20:43:31,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:31,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:31,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:31,280 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:31,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:31,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79590507] [2022-11-02 20:43:31,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79590507] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:31,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117558702] [2022-11-02 20:43:31,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:31,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:31,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:31,282 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:31,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-02 20:43:31,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:31,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:43:31,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:31,520 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:31,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:31,636 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:31,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117558702] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:43:31,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:43:31,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:43:31,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728396479] [2022-11-02 20:43:31,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:31,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:43:31,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:31,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:43:31,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:43:31,643 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 367 [2022-11-02 20:43:31,647 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 304 transitions, 699 flow. Second operand has 18 states, 18 states have (on average 293.6111111111111) internal successors, (5285), 18 states have internal predecessors, (5285), 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 20:43:31,648 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:31,648 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 367 [2022-11-02 20:43:31,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:32,015 INFO L130 PetriNetUnfolder]: 0/395 cut-off events. [2022-11-02 20:43:32,015 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-02 20:43:32,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 571 conditions, 395 events. 0/395 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 974 event pairs, 0 based on Foata normal form. 4/399 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-11-02 20:43:32,017 INFO L137 encePairwiseOnDemand]: 361/367 looper letters, 27 selfloop transitions, 21 changer transitions 0/328 dead transitions. [2022-11-02 20:43:32,017 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 328 transitions, 903 flow [2022-11-02 20:43:32,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:43:32,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:43:32,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6163 transitions. [2022-11-02 20:43:32,024 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7996626443492929 [2022-11-02 20:43:32,024 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6163 transitions. [2022-11-02 20:43:32,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6163 transitions. [2022-11-02 20:43:32,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:32,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6163 transitions. [2022-11-02 20:43:32,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 293.4761904761905) internal successors, (6163), 21 states have internal predecessors, (6163), 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 20:43:32,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 367.0) internal successors, (8074), 22 states have internal predecessors, (8074), 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 20:43:32,045 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 367.0) internal successors, (8074), 22 states have internal predecessors, (8074), 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 20:43:32,045 INFO L175 Difference]: Start difference. First operand has 329 places, 304 transitions, 699 flow. Second operand 21 states and 6163 transitions. [2022-11-02 20:43:32,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 328 transitions, 903 flow [2022-11-02 20:43:32,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 328 transitions, 889 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:43:32,052 INFO L231 Difference]: Finished difference. Result has 353 places, 317 transitions, 823 flow [2022-11-02 20:43:32,053 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=693, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=823, PETRI_PLACES=353, PETRI_TRANSITIONS=317} [2022-11-02 20:43:32,053 INFO L287 CegarLoopForPetriNet]: 328 programPoint places, 25 predicate places. [2022-11-02 20:43:32,053 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 317 transitions, 823 flow [2022-11-02 20:43:32,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 293.6111111111111) internal successors, (5285), 18 states have internal predecessors, (5285), 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 20:43:32,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:32,055 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:32,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:32,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-02 20:43:32,283 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:32,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:32,283 INFO L85 PathProgramCache]: Analyzing trace with hash 110716963, now seen corresponding path program 1 times [2022-11-02 20:43:32,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:32,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268952610] [2022-11-02 20:43:32,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:32,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:32,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:32,580 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:32,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:32,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268952610] [2022-11-02 20:43:32,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268952610] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:32,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272356207] [2022-11-02 20:43:32,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:32,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:32,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:32,583 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:32,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-02 20:43:32,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:32,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:43:32,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:32,913 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:32,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:33,284 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:33,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272356207] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:43:33,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:43:33,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-02 20:43:33,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938019006] [2022-11-02 20:43:33,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:33,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:43:33,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:33,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:43:33,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:43:33,306 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 367 [2022-11-02 20:43:33,313 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 317 transitions, 823 flow. Second operand has 34 states, 34 states have (on average 293.79411764705884) internal successors, (9989), 34 states have internal predecessors, (9989), 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 20:43:33,323 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:33,323 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 367 [2022-11-02 20:43:33,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:33,836 INFO L130 PetriNetUnfolder]: 0/362 cut-off events. [2022-11-02 20:43:33,836 INFO L131 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2022-11-02 20:43:33,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 567 conditions, 362 events. 0/362 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 777 event pairs, 0 based on Foata normal form. 3/365 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-11-02 20:43:33,838 INFO L137 encePairwiseOnDemand]: 362/367 looper letters, 30 selfloop transitions, 28 changer transitions 0/328 dead transitions. [2022-11-02 20:43:33,838 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 328 transitions, 1017 flow [2022-11-02 20:43:33,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-02 20:43:33,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-02 20:43:33,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 8791 transitions. [2022-11-02 20:43:33,852 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.798455949137148 [2022-11-02 20:43:33,852 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 8791 transitions. [2022-11-02 20:43:33,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 8791 transitions. [2022-11-02 20:43:33,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:33,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 8791 transitions. [2022-11-02 20:43:33,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 293.03333333333336) internal successors, (8791), 30 states have internal predecessors, (8791), 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 20:43:33,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 367.0) internal successors, (11377), 31 states have internal predecessors, (11377), 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 20:43:33,881 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 367.0) internal successors, (11377), 31 states have internal predecessors, (11377), 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 20:43:33,881 INFO L175 Difference]: Start difference. First operand has 353 places, 317 transitions, 823 flow. Second operand 30 states and 8791 transitions. [2022-11-02 20:43:33,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 328 transitions, 1017 flow [2022-11-02 20:43:33,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 328 transitions, 957 flow, removed 8 selfloop flow, removed 13 redundant places. [2022-11-02 20:43:33,889 INFO L231 Difference]: Finished difference. Result has 358 places, 312 transitions, 834 flow [2022-11-02 20:43:33,889 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=834, PETRI_PLACES=358, PETRI_TRANSITIONS=312} [2022-11-02 20:43:33,890 INFO L287 CegarLoopForPetriNet]: 328 programPoint places, 30 predicate places. [2022-11-02 20:43:33,890 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 312 transitions, 834 flow [2022-11-02 20:43:33,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 293.79411764705884) internal successors, (9989), 34 states have internal predecessors, (9989), 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 20:43:33,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:33,892 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:43:33,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:34,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-02 20:43:34,115 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:34,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:34,115 INFO L85 PathProgramCache]: Analyzing trace with hash -209069326, now seen corresponding path program 1 times [2022-11-02 20:43:34,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:34,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974906606] [2022-11-02 20:43:34,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:34,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:34,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:43:34,144 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:43:34,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:43:34,172 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:43:34,173 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:43:34,173 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:43:34,173 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:43:34,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-11-02 20:43:34,173 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-02 20:43:34,174 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:43:34,174 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2022-11-02 20:43:34,210 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:43:34,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 357 places, 400 transitions, 940 flow [2022-11-02 20:43:34,388 INFO L130 PetriNetUnfolder]: 104/755 cut-off events. [2022-11-02 20:43:34,389 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2022-11-02 20:43:34,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 841 conditions, 755 events. 104/755 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2595 event pairs, 0 based on Foata normal form. 0/629 useless extension candidates. Maximal degree in co-relation 739. Up to 22 conditions per place. [2022-11-02 20:43:34,415 INFO L82 GeneralOperation]: Start removeDead. Operand has 357 places, 400 transitions, 940 flow [2022-11-02 20:43:34,426 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 357 places, 400 transitions, 940 flow [2022-11-02 20:43:34,426 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:43:34,427 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;@4e0ca16a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:43:34,427 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:43:34,432 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-02 20:43:34,433 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:43:34,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:34,433 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] [2022-11-02 20:43:34,433 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:34,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:34,434 INFO L85 PathProgramCache]: Analyzing trace with hash -312573599, now seen corresponding path program 1 times [2022-11-02 20:43:34,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:34,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949356535] [2022-11-02 20:43:34,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:34,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:34,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:34,449 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 20:43:34,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:34,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949356535] [2022-11-02 20:43:34,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949356535] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:43:34,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:43:34,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:43:34,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490423953] [2022-11-02 20:43:34,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:43:34,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:43:34,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:34,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:43:34,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:43:34,452 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 325 out of 400 [2022-11-02 20:43:34,453 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 400 transitions, 940 flow. Second operand has 2 states, 2 states have (on average 325.5) internal successors, (651), 2 states have internal predecessors, (651), 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 20:43:34,453 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:34,453 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 325 of 400 [2022-11-02 20:43:34,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:34,653 INFO L130 PetriNetUnfolder]: 0/640 cut-off events. [2022-11-02 20:43:34,654 INFO L131 PetriNetUnfolder]: For 265/265 co-relation queries the response was YES. [2022-11-02 20:43:34,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 737 conditions, 640 events. 0/640 cut-off events. For 265/265 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 2409 event pairs, 0 based on Foata normal form. 322/940 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-11-02 20:43:34,655 INFO L137 encePairwiseOnDemand]: 336/400 looper letters, 10 selfloop transitions, 0 changer transitions 11/335 dead transitions. [2022-11-02 20:43:34,656 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 335 transitions, 830 flow [2022-11-02 20:43:34,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:43:34,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:43:34,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 724 transitions. [2022-11-02 20:43:34,657 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.905 [2022-11-02 20:43:34,658 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 724 transitions. [2022-11-02 20:43:34,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 724 transitions. [2022-11-02 20:43:34,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:34,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 724 transitions. [2022-11-02 20:43:34,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 362.0) internal successors, (724), 2 states have internal predecessors, (724), 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 20:43:34,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 400.0) internal successors, (1200), 3 states have internal predecessors, (1200), 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 20:43:34,661 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 400.0) internal successors, (1200), 3 states have internal predecessors, (1200), 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 20:43:34,661 INFO L175 Difference]: Start difference. First operand has 357 places, 400 transitions, 940 flow. Second operand 2 states and 724 transitions. [2022-11-02 20:43:34,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 335 transitions, 830 flow [2022-11-02 20:43:34,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 335 transitions, 740 flow, removed 45 selfloop flow, removed 0 redundant places. [2022-11-02 20:43:34,668 INFO L231 Difference]: Finished difference. Result has 357 places, 324 transitions, 698 flow [2022-11-02 20:43:34,669 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=720, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=698, PETRI_PLACES=357, PETRI_TRANSITIONS=324} [2022-11-02 20:43:34,669 INFO L287 CegarLoopForPetriNet]: 357 programPoint places, 0 predicate places. [2022-11-02 20:43:34,669 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 324 transitions, 698 flow [2022-11-02 20:43:34,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 325.5) internal successors, (651), 2 states have internal predecessors, (651), 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 20:43:34,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:34,670 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] [2022-11-02 20:43:34,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-11-02 20:43:34,670 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:34,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:34,671 INFO L85 PathProgramCache]: Analyzing trace with hash -2109524958, now seen corresponding path program 1 times [2022-11-02 20:43:34,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:34,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420629771] [2022-11-02 20:43:34,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:34,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:34,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:34,698 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 20:43:34,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:34,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420629771] [2022-11-02 20:43:34,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420629771] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:43:34,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:43:34,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:43:34,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405802533] [2022-11-02 20:43:34,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:43:34,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:43:34,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:34,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:43:34,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:43:34,701 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 400 [2022-11-02 20:43:34,702 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 324 transitions, 698 flow. Second operand has 3 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 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 20:43:34,702 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:34,702 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 400 [2022-11-02 20:43:34,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:34,883 INFO L130 PetriNetUnfolder]: 0/508 cut-off events. [2022-11-02 20:43:34,883 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-11-02 20:43:34,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 615 conditions, 508 events. 0/508 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1561 event pairs, 0 based on Foata normal form. 0/498 useless extension candidates. Maximal degree in co-relation 0. Up to 60 conditions per place. [2022-11-02 20:43:34,885 INFO L137 encePairwiseOnDemand]: 397/400 looper letters, 19 selfloop transitions, 2 changer transitions 0/328 dead transitions. [2022-11-02 20:43:34,885 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 328 transitions, 748 flow [2022-11-02 20:43:34,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:43:34,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:43:34,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 976 transitions. [2022-11-02 20:43:34,888 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8133333333333334 [2022-11-02 20:43:34,888 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 976 transitions. [2022-11-02 20:43:34,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 976 transitions. [2022-11-02 20:43:34,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:34,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 976 transitions. [2022-11-02 20:43:34,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 325.3333333333333) internal successors, (976), 3 states have internal predecessors, (976), 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 20:43:34,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 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 20:43:34,892 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 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 20:43:34,892 INFO L175 Difference]: Start difference. First operand has 357 places, 324 transitions, 698 flow. Second operand 3 states and 976 transitions. [2022-11-02 20:43:34,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 328 transitions, 748 flow [2022-11-02 20:43:34,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 328 transitions, 748 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:43:34,898 INFO L231 Difference]: Finished difference. Result has 349 places, 325 transitions, 710 flow [2022-11-02 20:43:34,899 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=698, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=710, PETRI_PLACES=349, PETRI_TRANSITIONS=325} [2022-11-02 20:43:34,899 INFO L287 CegarLoopForPetriNet]: 357 programPoint places, -8 predicate places. [2022-11-02 20:43:34,899 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 325 transitions, 710 flow [2022-11-02 20:43:34,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 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 20:43:34,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:34,900 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] [2022-11-02 20:43:34,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-11-02 20:43:34,900 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:34,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:34,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1154115786, now seen corresponding path program 1 times [2022-11-02 20:43:34,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:34,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027687304] [2022-11-02 20:43:34,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:34,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:34,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:34,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:34,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:34,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027687304] [2022-11-02 20:43:34,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027687304] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:34,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505631603] [2022-11-02 20:43:34,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:34,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:34,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:34,952 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:34,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-02 20:43:35,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:35,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:43:35,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:35,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:35,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:35,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:35,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505631603] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:43:35,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:43:35,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:43:35,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873494539] [2022-11-02 20:43:35,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:35,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:43:35,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:35,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:43:35,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:43:35,217 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 400 [2022-11-02 20:43:35,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 325 transitions, 710 flow. Second operand has 10 states, 10 states have (on average 319.3) internal successors, (3193), 10 states have internal predecessors, (3193), 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 20:43:35,219 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:35,220 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 400 [2022-11-02 20:43:35,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:35,468 INFO L130 PetriNetUnfolder]: 0/486 cut-off events. [2022-11-02 20:43:35,468 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-02 20:43:35,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 623 conditions, 486 events. 0/486 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1432 event pairs, 0 based on Foata normal form. 2/488 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2022-11-02 20:43:35,470 INFO L137 encePairwiseOnDemand]: 394/400 looper letters, 20 selfloop transitions, 9 changer transitions 0/335 dead transitions. [2022-11-02 20:43:35,470 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 335 transitions, 790 flow [2022-11-02 20:43:35,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:43:35,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:43:35,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2884 transitions. [2022-11-02 20:43:35,474 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8011111111111111 [2022-11-02 20:43:35,474 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2884 transitions. [2022-11-02 20:43:35,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2884 transitions. [2022-11-02 20:43:35,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:35,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2884 transitions. [2022-11-02 20:43:35,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 320.44444444444446) internal successors, (2884), 9 states have internal predecessors, (2884), 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 20:43:35,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 400.0) internal successors, (4000), 10 states have internal predecessors, (4000), 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 20:43:35,483 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 400.0) internal successors, (4000), 10 states have internal predecessors, (4000), 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 20:43:35,483 INFO L175 Difference]: Start difference. First operand has 349 places, 325 transitions, 710 flow. Second operand 9 states and 2884 transitions. [2022-11-02 20:43:35,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 335 transitions, 790 flow [2022-11-02 20:43:35,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 335 transitions, 788 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:43:35,489 INFO L231 Difference]: Finished difference. Result has 359 places, 331 transitions, 758 flow [2022-11-02 20:43:35,490 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=758, PETRI_PLACES=359, PETRI_TRANSITIONS=331} [2022-11-02 20:43:35,490 INFO L287 CegarLoopForPetriNet]: 357 programPoint places, 2 predicate places. [2022-11-02 20:43:35,490 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 331 transitions, 758 flow [2022-11-02 20:43:35,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 319.3) internal successors, (3193), 10 states have internal predecessors, (3193), 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 20:43:35,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:35,491 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:35,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:35,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-11-02 20:43:35,715 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:35,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:35,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1243680545, now seen corresponding path program 1 times [2022-11-02 20:43:35,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:35,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178613544] [2022-11-02 20:43:35,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:35,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:35,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:35,821 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:35,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:35,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178613544] [2022-11-02 20:43:35,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178613544] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:35,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4045378] [2022-11-02 20:43:35,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:35,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:35,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:35,823 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:35,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-02 20:43:36,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:36,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:43:36,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:36,081 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:36,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:36,185 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:36,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4045378] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:43:36,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:43:36,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:43:36,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20199716] [2022-11-02 20:43:36,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:36,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:43:36,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:36,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:43:36,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:43:36,192 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 400 [2022-11-02 20:43:36,195 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 331 transitions, 758 flow. Second operand has 18 states, 18 states have (on average 319.6111111111111) internal successors, (5753), 18 states have internal predecessors, (5753), 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 20:43:36,195 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:36,195 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 400 [2022-11-02 20:43:36,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:36,537 INFO L130 PetriNetUnfolder]: 0/442 cut-off events. [2022-11-02 20:43:36,537 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2022-11-02 20:43:36,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 640 conditions, 442 events. 0/442 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1144 event pairs, 0 based on Foata normal form. 4/446 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-11-02 20:43:36,539 INFO L137 encePairwiseOnDemand]: 394/400 looper letters, 28 selfloop transitions, 21 changer transitions 0/355 dead transitions. [2022-11-02 20:43:36,539 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 355 transitions, 964 flow [2022-11-02 20:43:36,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:43:36,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:43:36,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6710 transitions. [2022-11-02 20:43:36,546 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7988095238095239 [2022-11-02 20:43:36,546 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6710 transitions. [2022-11-02 20:43:36,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6710 transitions. [2022-11-02 20:43:36,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:36,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6710 transitions. [2022-11-02 20:43:36,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 319.5238095238095) internal successors, (6710), 21 states have internal predecessors, (6710), 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 20:43:36,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 400.0) internal successors, (8800), 22 states have internal predecessors, (8800), 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 20:43:36,565 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 400.0) internal successors, (8800), 22 states have internal predecessors, (8800), 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 20:43:36,565 INFO L175 Difference]: Start difference. First operand has 359 places, 331 transitions, 758 flow. Second operand 21 states and 6710 transitions. [2022-11-02 20:43:36,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 355 transitions, 964 flow [2022-11-02 20:43:36,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 355 transitions, 950 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:43:36,573 INFO L231 Difference]: Finished difference. Result has 383 places, 344 transitions, 882 flow [2022-11-02 20:43:36,574 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=752, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=882, PETRI_PLACES=383, PETRI_TRANSITIONS=344} [2022-11-02 20:43:36,574 INFO L287 CegarLoopForPetriNet]: 357 programPoint places, 26 predicate places. [2022-11-02 20:43:36,574 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 344 transitions, 882 flow [2022-11-02 20:43:36,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 319.6111111111111) internal successors, (5753), 18 states have internal predecessors, (5753), 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 20:43:36,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:36,576 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:36,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:36,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:36,791 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:36,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:36,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1389100285, now seen corresponding path program 1 times [2022-11-02 20:43:36,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:36,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247631648] [2022-11-02 20:43:36,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:36,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:36,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:37,129 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:37,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:37,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247631648] [2022-11-02 20:43:37,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247631648] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:37,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643824874] [2022-11-02 20:43:37,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:37,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:37,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:37,131 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:37,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-02 20:43:37,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:37,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:43:37,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:37,498 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:37,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:37,851 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:37,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643824874] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:43:37,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:43:37,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-02 20:43:37,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647662152] [2022-11-02 20:43:37,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:37,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:43:37,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:37,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:43:37,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:43:37,861 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 400 [2022-11-02 20:43:37,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 344 transitions, 882 flow. Second operand has 34 states, 34 states have (on average 319.79411764705884) internal successors, (10873), 34 states have internal predecessors, (10873), 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 20:43:37,868 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:37,868 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 400 [2022-11-02 20:43:37,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:38,431 INFO L130 PetriNetUnfolder]: 0/398 cut-off events. [2022-11-02 20:43:38,432 INFO L131 PetriNetUnfolder]: For 141/141 co-relation queries the response was YES. [2022-11-02 20:43:38,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 626 conditions, 398 events. 0/398 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 875 event pairs, 0 based on Foata normal form. 4/402 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2022-11-02 20:43:38,433 INFO L137 encePairwiseOnDemand]: 395/400 looper letters, 33 selfloop transitions, 31 changer transitions 0/360 dead transitions. [2022-11-02 20:43:38,434 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 360 transitions, 1122 flow [2022-11-02 20:43:38,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-02 20:43:38,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-02 20:43:38,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 10529 transitions. [2022-11-02 20:43:38,476 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7976515151515151 [2022-11-02 20:43:38,476 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 10529 transitions. [2022-11-02 20:43:38,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 10529 transitions. [2022-11-02 20:43:38,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:38,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 10529 transitions. [2022-11-02 20:43:38,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 319.06060606060606) internal successors, (10529), 33 states have internal predecessors, (10529), 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 20:43:38,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 400.0) internal successors, (13600), 34 states have internal predecessors, (13600), 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 20:43:38,516 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 400.0) internal successors, (13600), 34 states have internal predecessors, (13600), 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 20:43:38,517 INFO L175 Difference]: Start difference. First operand has 383 places, 344 transitions, 882 flow. Second operand 33 states and 10529 transitions. [2022-11-02 20:43:38,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 360 transitions, 1122 flow [2022-11-02 20:43:38,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 360 transitions, 1056 flow, removed 9 selfloop flow, removed 13 redundant places. [2022-11-02 20:43:38,527 INFO L231 Difference]: Finished difference. Result has 391 places, 342 transitions, 917 flow [2022-11-02 20:43:38,527 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=917, PETRI_PLACES=391, PETRI_TRANSITIONS=342} [2022-11-02 20:43:38,528 INFO L287 CegarLoopForPetriNet]: 357 programPoint places, 34 predicate places. [2022-11-02 20:43:38,528 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 342 transitions, 917 flow [2022-11-02 20:43:38,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 319.79411764705884) internal successors, (10873), 34 states have internal predecessors, (10873), 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 20:43:38,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:38,530 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:43:38,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:38,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-11-02 20:43:38,747 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:38,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:38,747 INFO L85 PathProgramCache]: Analyzing trace with hash 2124296463, now seen corresponding path program 1 times [2022-11-02 20:43:38,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:38,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622308262] [2022-11-02 20:43:38,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:38,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:38,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:43:38,785 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:43:38,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:43:38,820 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:43:38,821 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:43:38,821 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:43:38,821 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:43:38,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-11-02 20:43:38,821 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-02 20:43:38,822 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:43:38,822 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2022-11-02 20:43:38,898 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:43:38,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 386 places, 433 transitions, 1031 flow [2022-11-02 20:43:39,151 INFO L130 PetriNetUnfolder]: 114/824 cut-off events. [2022-11-02 20:43:39,151 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2022-11-02 20:43:39,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 924 conditions, 824 events. 114/824 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2851 event pairs, 0 based on Foata normal form. 0/686 useless extension candidates. Maximal degree in co-relation 819. Up to 24 conditions per place. [2022-11-02 20:43:39,171 INFO L82 GeneralOperation]: Start removeDead. Operand has 386 places, 433 transitions, 1031 flow [2022-11-02 20:43:39,184 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 386 places, 433 transitions, 1031 flow [2022-11-02 20:43:39,185 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:43:39,185 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;@4e0ca16a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:43:39,185 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:43:39,191 INFO L130 PetriNetUnfolder]: 4/80 cut-off events. [2022-11-02 20:43:39,191 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:43:39,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:39,192 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] [2022-11-02 20:43:39,192 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:39,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:39,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1953435615, now seen corresponding path program 1 times [2022-11-02 20:43:39,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:39,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270757485] [2022-11-02 20:43:39,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:39,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:39,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:39,208 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 20:43:39,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:39,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270757485] [2022-11-02 20:43:39,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270757485] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:43:39,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:43:39,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:43:39,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923895641] [2022-11-02 20:43:39,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:43:39,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:43:39,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:39,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:43:39,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:43:39,211 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 351 out of 433 [2022-11-02 20:43:39,212 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 433 transitions, 1031 flow. Second operand has 2 states, 2 states have (on average 351.5) internal successors, (703), 2 states have internal predecessors, (703), 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 20:43:39,212 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:39,212 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 351 of 433 [2022-11-02 20:43:39,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:39,481 INFO L130 PetriNetUnfolder]: 0/698 cut-off events. [2022-11-02 20:43:39,482 INFO L131 PetriNetUnfolder]: For 341/341 co-relation queries the response was YES. [2022-11-02 20:43:39,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 810 conditions, 698 events. 0/698 cut-off events. For 341/341 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2629 event pairs, 0 based on Foata normal form. 386/1060 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2022-11-02 20:43:39,484 INFO L137 encePairwiseOnDemand]: 363/433 looper letters, 11 selfloop transitions, 0 changer transitions 11/362 dead transitions. [2022-11-02 20:43:39,485 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 362 transitions, 911 flow [2022-11-02 20:43:39,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:43:39,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:43:39,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 783 transitions. [2022-11-02 20:43:39,486 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9041570438799076 [2022-11-02 20:43:39,486 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 783 transitions. [2022-11-02 20:43:39,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 783 transitions. [2022-11-02 20:43:39,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:39,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 783 transitions. [2022-11-02 20:43:39,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 391.5) internal successors, (783), 2 states have internal predecessors, (783), 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 20:43:39,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 433.0) internal successors, (1299), 3 states have internal predecessors, (1299), 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 20:43:39,489 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 433.0) internal successors, (1299), 3 states have internal predecessors, (1299), 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 20:43:39,490 INFO L175 Difference]: Start difference. First operand has 386 places, 433 transitions, 1031 flow. Second operand 2 states and 783 transitions. [2022-11-02 20:43:39,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 362 transitions, 911 flow [2022-11-02 20:43:39,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 362 transitions, 801 flow, removed 55 selfloop flow, removed 0 redundant places. [2022-11-02 20:43:39,497 INFO L231 Difference]: Finished difference. Result has 386 places, 351 transitions, 757 flow [2022-11-02 20:43:39,497 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=779, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=757, PETRI_PLACES=386, PETRI_TRANSITIONS=351} [2022-11-02 20:43:39,498 INFO L287 CegarLoopForPetriNet]: 386 programPoint places, 0 predicate places. [2022-11-02 20:43:39,498 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 351 transitions, 757 flow [2022-11-02 20:43:39,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 351.5) internal successors, (703), 2 states have internal predecessors, (703), 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 20:43:39,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:39,498 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] [2022-11-02 20:43:39,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-11-02 20:43:39,499 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:39,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:39,499 INFO L85 PathProgramCache]: Analyzing trace with hash 544580322, now seen corresponding path program 1 times [2022-11-02 20:43:39,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:39,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595671589] [2022-11-02 20:43:39,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:39,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:39,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:39,523 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 20:43:39,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:39,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595671589] [2022-11-02 20:43:39,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595671589] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:43:39,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:43:39,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:43:39,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953510420] [2022-11-02 20:43:39,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:43:39,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:43:39,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:39,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:43:39,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:43:39,527 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 344 out of 433 [2022-11-02 20:43:39,527 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 351 transitions, 757 flow. Second operand has 3 states, 3 states have (on average 345.0) internal successors, (1035), 3 states have internal predecessors, (1035), 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 20:43:39,528 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:39,528 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 344 of 433 [2022-11-02 20:43:39,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:39,735 INFO L130 PetriNetUnfolder]: 0/555 cut-off events. [2022-11-02 20:43:39,735 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-02 20:43:39,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 672 conditions, 555 events. 0/555 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1731 event pairs, 0 based on Foata normal form. 0/544 useless extension candidates. Maximal degree in co-relation 0. Up to 66 conditions per place. [2022-11-02 20:43:39,737 INFO L137 encePairwiseOnDemand]: 430/433 looper letters, 20 selfloop transitions, 2 changer transitions 0/355 dead transitions. [2022-11-02 20:43:39,737 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 355 transitions, 809 flow [2022-11-02 20:43:39,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:43:39,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:43:39,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1055 transitions. [2022-11-02 20:43:39,739 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8121632024634334 [2022-11-02 20:43:39,739 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1055 transitions. [2022-11-02 20:43:39,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1055 transitions. [2022-11-02 20:43:39,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:39,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1055 transitions. [2022-11-02 20:43:39,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 351.6666666666667) internal successors, (1055), 3 states have internal predecessors, (1055), 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 20:43:39,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 433.0) internal successors, (1732), 4 states have internal predecessors, (1732), 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 20:43:39,743 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 433.0) internal successors, (1732), 4 states have internal predecessors, (1732), 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 20:43:39,743 INFO L175 Difference]: Start difference. First operand has 386 places, 351 transitions, 757 flow. Second operand 3 states and 1055 transitions. [2022-11-02 20:43:39,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 355 transitions, 809 flow [2022-11-02 20:43:39,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 355 transitions, 809 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:43:39,749 INFO L231 Difference]: Finished difference. Result has 378 places, 352 transitions, 769 flow [2022-11-02 20:43:39,750 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=757, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=769, PETRI_PLACES=378, PETRI_TRANSITIONS=352} [2022-11-02 20:43:39,750 INFO L287 CegarLoopForPetriNet]: 386 programPoint places, -8 predicate places. [2022-11-02 20:43:39,750 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 352 transitions, 769 flow [2022-11-02 20:43:39,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 345.0) internal successors, (1035), 3 states have internal predecessors, (1035), 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 20:43:39,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:39,751 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] [2022-11-02 20:43:39,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-11-02 20:43:39,751 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:39,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:39,752 INFO L85 PathProgramCache]: Analyzing trace with hash -382004042, now seen corresponding path program 1 times [2022-11-02 20:43:39,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:39,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110613868] [2022-11-02 20:43:39,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:39,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:39,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:39,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:39,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:39,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110613868] [2022-11-02 20:43:39,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110613868] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:39,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711018990] [2022-11-02 20:43:39,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:39,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:39,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:39,798 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:39,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-02 20:43:40,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:40,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:43:40,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:40,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:40,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:40,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:40,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711018990] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:43:40,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:43:40,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:43:40,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800509874] [2022-11-02 20:43:40,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:40,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:43:40,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:40,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:43:40,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:43:40,080 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 433 [2022-11-02 20:43:40,082 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 352 transitions, 769 flow. Second operand has 10 states, 10 states have (on average 345.3) internal successors, (3453), 10 states have internal predecessors, (3453), 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 20:43:40,082 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:40,082 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 433 [2022-11-02 20:43:40,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:40,337 INFO L130 PetriNetUnfolder]: 0/533 cut-off events. [2022-11-02 20:43:40,337 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-11-02 20:43:40,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 683 conditions, 533 events. 0/533 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1602 event pairs, 0 based on Foata normal form. 2/535 useless extension candidates. Maximal degree in co-relation 0. Up to 39 conditions per place. [2022-11-02 20:43:40,339 INFO L137 encePairwiseOnDemand]: 427/433 looper letters, 21 selfloop transitions, 9 changer transitions 0/362 dead transitions. [2022-11-02 20:43:40,339 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 362 transitions, 851 flow [2022-11-02 20:43:40,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:43:40,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:43:40,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3119 transitions. [2022-11-02 20:43:40,342 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.800359250705671 [2022-11-02 20:43:40,343 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3119 transitions. [2022-11-02 20:43:40,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3119 transitions. [2022-11-02 20:43:40,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:40,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3119 transitions. [2022-11-02 20:43:40,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 346.55555555555554) internal successors, (3119), 9 states have internal predecessors, (3119), 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 20:43:40,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 433.0) internal successors, (4330), 10 states have internal predecessors, (4330), 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 20:43:40,352 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 433.0) internal successors, (4330), 10 states have internal predecessors, (4330), 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 20:43:40,352 INFO L175 Difference]: Start difference. First operand has 378 places, 352 transitions, 769 flow. Second operand 9 states and 3119 transitions. [2022-11-02 20:43:40,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 362 transitions, 851 flow [2022-11-02 20:43:40,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 362 transitions, 849 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:43:40,360 INFO L231 Difference]: Finished difference. Result has 388 places, 358 transitions, 817 flow [2022-11-02 20:43:40,361 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=767, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=817, PETRI_PLACES=388, PETRI_TRANSITIONS=358} [2022-11-02 20:43:40,361 INFO L287 CegarLoopForPetriNet]: 386 programPoint places, 2 predicate places. [2022-11-02 20:43:40,361 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 358 transitions, 817 flow [2022-11-02 20:43:40,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 345.3) internal successors, (3453), 10 states have internal predecessors, (3453), 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 20:43:40,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:40,362 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:40,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:40,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-11-02 20:43:40,578 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:40,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:40,579 INFO L85 PathProgramCache]: Analyzing trace with hash 33446433, now seen corresponding path program 1 times [2022-11-02 20:43:40,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:40,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167311527] [2022-11-02 20:43:40,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:40,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:40,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:40,719 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:40,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:40,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167311527] [2022-11-02 20:43:40,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167311527] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:40,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190808848] [2022-11-02 20:43:40,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:40,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:40,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:40,722 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:40,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-02 20:43:40,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:40,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:43:40,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:40,993 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:40,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:41,110 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:41,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190808848] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:43:41,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:43:41,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:43:41,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396889735] [2022-11-02 20:43:41,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:41,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:43:41,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:41,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:43:41,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:43:41,117 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 433 [2022-11-02 20:43:41,120 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 358 transitions, 817 flow. Second operand has 18 states, 18 states have (on average 345.6111111111111) internal successors, (6221), 18 states have internal predecessors, (6221), 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 20:43:41,121 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:41,121 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 433 [2022-11-02 20:43:41,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:41,508 INFO L130 PetriNetUnfolder]: 0/489 cut-off events. [2022-11-02 20:43:41,508 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2022-11-02 20:43:41,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 708 conditions, 489 events. 0/489 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1314 event pairs, 0 based on Foata normal form. 4/493 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2022-11-02 20:43:41,510 INFO L137 encePairwiseOnDemand]: 427/433 looper letters, 29 selfloop transitions, 21 changer transitions 0/382 dead transitions. [2022-11-02 20:43:41,510 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 382 transitions, 1025 flow [2022-11-02 20:43:41,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:43:41,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:43:41,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 7257 transitions. [2022-11-02 20:43:41,519 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7980864401187727 [2022-11-02 20:43:41,519 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 7257 transitions. [2022-11-02 20:43:41,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 7257 transitions. [2022-11-02 20:43:41,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:41,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 7257 transitions. [2022-11-02 20:43:41,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 345.57142857142856) internal successors, (7257), 21 states have internal predecessors, (7257), 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 20:43:41,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 433.0) internal successors, (9526), 22 states have internal predecessors, (9526), 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 20:43:41,539 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 433.0) internal successors, (9526), 22 states have internal predecessors, (9526), 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 20:43:41,540 INFO L175 Difference]: Start difference. First operand has 388 places, 358 transitions, 817 flow. Second operand 21 states and 7257 transitions. [2022-11-02 20:43:41,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 382 transitions, 1025 flow [2022-11-02 20:43:41,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 382 transitions, 1011 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:43:41,548 INFO L231 Difference]: Finished difference. Result has 412 places, 371 transitions, 941 flow [2022-11-02 20:43:41,549 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=941, PETRI_PLACES=412, PETRI_TRANSITIONS=371} [2022-11-02 20:43:41,549 INFO L287 CegarLoopForPetriNet]: 386 programPoint places, 26 predicate places. [2022-11-02 20:43:41,550 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 371 transitions, 941 flow [2022-11-02 20:43:41,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 345.6111111111111) internal successors, (6221), 18 states have internal predecessors, (6221), 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 20:43:41,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:41,551 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:41,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:41,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:41,779 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:41,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:41,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1613256445, now seen corresponding path program 1 times [2022-11-02 20:43:41,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:41,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182085073] [2022-11-02 20:43:41,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:41,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:41,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:42,049 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:42,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:42,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182085073] [2022-11-02 20:43:42,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182085073] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:42,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889306085] [2022-11-02 20:43:42,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:42,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:42,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:42,051 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:42,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-02 20:43:42,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:42,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:43:42,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:42,415 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:42,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:42,796 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:42,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889306085] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:43:42,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:43:42,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-02 20:43:42,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969344198] [2022-11-02 20:43:42,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:42,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:43:42,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:42,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:43:42,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:43:42,806 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 433 [2022-11-02 20:43:42,813 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 371 transitions, 941 flow. Second operand has 34 states, 34 states have (on average 345.79411764705884) internal successors, (11757), 34 states have internal predecessors, (11757), 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 20:43:42,813 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:42,813 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 433 [2022-11-02 20:43:42,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:43,371 INFO L130 PetriNetUnfolder]: 0/434 cut-off events. [2022-11-02 20:43:43,371 INFO L131 PetriNetUnfolder]: For 168/168 co-relation queries the response was YES. [2022-11-02 20:43:43,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 684 conditions, 434 events. 0/434 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 973 event pairs, 0 based on Foata normal form. 5/439 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-11-02 20:43:43,374 INFO L137 encePairwiseOnDemand]: 428/433 looper letters, 36 selfloop transitions, 34 changer transitions 0/392 dead transitions. [2022-11-02 20:43:43,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 392 transitions, 1227 flow [2022-11-02 20:43:43,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-02 20:43:43,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-11-02 20:43:43,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 12423 transitions. [2022-11-02 20:43:43,385 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7969591993841416 [2022-11-02 20:43:43,385 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 12423 transitions. [2022-11-02 20:43:43,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 12423 transitions. [2022-11-02 20:43:43,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:43,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 12423 transitions. [2022-11-02 20:43:43,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 345.0833333333333) internal successors, (12423), 36 states have internal predecessors, (12423), 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 20:43:43,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 433.0) internal successors, (16021), 37 states have internal predecessors, (16021), 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 20:43:43,416 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 433.0) internal successors, (16021), 37 states have internal predecessors, (16021), 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 20:43:43,416 INFO L175 Difference]: Start difference. First operand has 412 places, 371 transitions, 941 flow. Second operand 36 states and 12423 transitions. [2022-11-02 20:43:43,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 392 transitions, 1227 flow [2022-11-02 20:43:43,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 392 transitions, 1155 flow, removed 10 selfloop flow, removed 13 redundant places. [2022-11-02 20:43:43,425 INFO L231 Difference]: Finished difference. Result has 423 places, 372 transitions, 1000 flow [2022-11-02 20:43:43,426 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=860, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1000, PETRI_PLACES=423, PETRI_TRANSITIONS=372} [2022-11-02 20:43:43,427 INFO L287 CegarLoopForPetriNet]: 386 programPoint places, 37 predicate places. [2022-11-02 20:43:43,427 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 372 transitions, 1000 flow [2022-11-02 20:43:43,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 345.79411764705884) internal successors, (11757), 34 states have internal predecessors, (11757), 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 20:43:43,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:43,429 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:43:43,464 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-11-02 20:43:43,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-11-02 20:43:43,643 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:43,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:43,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1736277805, now seen corresponding path program 1 times [2022-11-02 20:43:43,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:43,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373506629] [2022-11-02 20:43:43,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:43,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:43,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:43:43,674 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:43:43,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:43:43,710 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:43:43,710 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:43:43,710 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:43:43,711 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:43:43,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-11-02 20:43:43,711 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-02 20:43:43,712 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:43:43,712 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2022-11-02 20:43:43,754 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:43:43,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 415 places, 466 transitions, 1124 flow [2022-11-02 20:43:44,051 INFO L130 PetriNetUnfolder]: 124/893 cut-off events. [2022-11-02 20:43:44,051 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2022-11-02 20:43:44,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1008 conditions, 893 events. 124/893 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 3181 event pairs, 0 based on Foata normal form. 0/743 useless extension candidates. Maximal degree in co-relation 900. Up to 26 conditions per place. [2022-11-02 20:43:44,083 INFO L82 GeneralOperation]: Start removeDead. Operand has 415 places, 466 transitions, 1124 flow [2022-11-02 20:43:44,097 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 415 places, 466 transitions, 1124 flow [2022-11-02 20:43:44,099 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:43:44,100 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;@4e0ca16a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:43:44,101 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:43:44,109 INFO L130 PetriNetUnfolder]: 3/77 cut-off events. [2022-11-02 20:43:44,109 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:43:44,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:44,109 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] [2022-11-02 20:43:44,110 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:44,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:44,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1327871074, now seen corresponding path program 1 times [2022-11-02 20:43:44,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:44,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804283484] [2022-11-02 20:43:44,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:44,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:44,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:44,150 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 20:43:44,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:44,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804283484] [2022-11-02 20:43:44,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804283484] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:43:44,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:43:44,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:43:44,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676083395] [2022-11-02 20:43:44,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:43:44,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:43:44,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:44,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:43:44,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:43:44,155 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 370 out of 466 [2022-11-02 20:43:44,157 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 466 transitions, 1124 flow. Second operand has 3 states, 3 states have (on average 371.0) internal successors, (1113), 3 states have internal predecessors, (1113), 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 20:43:44,157 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:44,157 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 370 of 466 [2022-11-02 20:43:44,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:44,491 INFO L130 PetriNetUnfolder]: 0/734 cut-off events. [2022-11-02 20:43:44,492 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2022-11-02 20:43:44,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 926 conditions, 734 events. 0/734 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 2812 event pairs, 0 based on Foata normal form. 2389/3099 useless extension candidates. Maximal degree in co-relation 0. Up to 72 conditions per place. [2022-11-02 20:43:44,495 INFO L137 encePairwiseOnDemand]: 387/466 looper letters, 21 selfloop transitions, 2 changer transitions 11/393 dead transitions. [2022-11-02 20:43:44,495 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 393 transitions, 1024 flow [2022-11-02 20:43:44,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:43:44,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:43:44,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1217 transitions. [2022-11-02 20:43:44,497 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8705293276108726 [2022-11-02 20:43:44,497 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1217 transitions. [2022-11-02 20:43:44,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1217 transitions. [2022-11-02 20:43:44,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:44,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1217 transitions. [2022-11-02 20:43:44,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 405.6666666666667) internal successors, (1217), 3 states have internal predecessors, (1217), 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 20:43:44,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 466.0) internal successors, (1864), 4 states have internal predecessors, (1864), 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 20:43:44,502 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 466.0) internal successors, (1864), 4 states have internal predecessors, (1864), 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 20:43:44,502 INFO L175 Difference]: Start difference. First operand has 415 places, 466 transitions, 1124 flow. Second operand 3 states and 1217 transitions. [2022-11-02 20:43:44,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 393 transitions, 1024 flow [2022-11-02 20:43:44,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 393 transitions, 892 flow, removed 66 selfloop flow, removed 0 redundant places. [2022-11-02 20:43:44,511 INFO L231 Difference]: Finished difference. Result has 417 places, 379 transitions, 828 flow [2022-11-02 20:43:44,512 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=466, PETRI_DIFFERENCE_MINUEND_FLOW=838, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=828, PETRI_PLACES=417, PETRI_TRANSITIONS=379} [2022-11-02 20:43:44,512 INFO L287 CegarLoopForPetriNet]: 415 programPoint places, 2 predicate places. [2022-11-02 20:43:44,512 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 379 transitions, 828 flow [2022-11-02 20:43:44,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 371.0) internal successors, (1113), 3 states have internal predecessors, (1113), 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 20:43:44,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:44,513 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] [2022-11-02 20:43:44,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-11-02 20:43:44,513 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:44,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:44,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1582336406, now seen corresponding path program 1 times [2022-11-02 20:43:44,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:44,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607129543] [2022-11-02 20:43:44,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:44,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:44,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:44,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:44,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:44,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607129543] [2022-11-02 20:43:44,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607129543] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:44,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798763980] [2022-11-02 20:43:44,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:44,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:44,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:44,560 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:44,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-02 20:43:44,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:44,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:43:44,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:44,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:44,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:44,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:44,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798763980] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:43:44,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:43:44,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:43:44,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453448799] [2022-11-02 20:43:44,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:44,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:43:44,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:44,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:43:44,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:43:44,880 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 369 out of 466 [2022-11-02 20:43:44,882 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 379 transitions, 828 flow. Second operand has 10 states, 10 states have (on average 371.3) internal successors, (3713), 10 states have internal predecessors, (3713), 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 20:43:44,882 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:44,882 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 369 of 466 [2022-11-02 20:43:44,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:45,209 INFO L130 PetriNetUnfolder]: 0/580 cut-off events. [2022-11-02 20:43:45,209 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-11-02 20:43:45,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 742 conditions, 580 events. 0/580 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1782 event pairs, 0 based on Foata normal form. 2/582 useless extension candidates. Maximal degree in co-relation 0. Up to 43 conditions per place. [2022-11-02 20:43:45,211 INFO L137 encePairwiseOnDemand]: 460/466 looper letters, 22 selfloop transitions, 9 changer transitions 0/389 dead transitions. [2022-11-02 20:43:45,211 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 389 transitions, 912 flow [2022-11-02 20:43:45,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:43:45,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:43:45,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3354 transitions. [2022-11-02 20:43:45,215 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7997138769670958 [2022-11-02 20:43:45,216 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3354 transitions. [2022-11-02 20:43:45,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3354 transitions. [2022-11-02 20:43:45,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:45,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3354 transitions. [2022-11-02 20:43:45,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 372.6666666666667) internal successors, (3354), 9 states have internal predecessors, (3354), 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 20:43:45,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 466.0) internal successors, (4660), 10 states have internal predecessors, (4660), 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 20:43:45,230 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 466.0) internal successors, (4660), 10 states have internal predecessors, (4660), 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 20:43:45,230 INFO L175 Difference]: Start difference. First operand has 417 places, 379 transitions, 828 flow. Second operand 9 states and 3354 transitions. [2022-11-02 20:43:45,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 389 transitions, 912 flow [2022-11-02 20:43:45,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 389 transitions, 910 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:43:45,238 INFO L231 Difference]: Finished difference. Result has 416 places, 385 transitions, 876 flow [2022-11-02 20:43:45,239 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=466, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=876, PETRI_PLACES=416, PETRI_TRANSITIONS=385} [2022-11-02 20:43:45,240 INFO L287 CegarLoopForPetriNet]: 415 programPoint places, 1 predicate places. [2022-11-02 20:43:45,240 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 385 transitions, 876 flow [2022-11-02 20:43:45,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 371.3) internal successors, (3713), 10 states have internal predecessors, (3713), 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 20:43:45,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:45,241 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:45,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:45,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-11-02 20:43:45,455 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:45,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:45,455 INFO L85 PathProgramCache]: Analyzing trace with hash 206466497, now seen corresponding path program 1 times [2022-11-02 20:43:45,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:45,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089963990] [2022-11-02 20:43:45,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:45,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:45,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:45,567 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:45,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:45,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089963990] [2022-11-02 20:43:45,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089963990] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:45,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652852249] [2022-11-02 20:43:45,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:45,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:45,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:45,569 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:45,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-02 20:43:45,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:45,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:43:45,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:45,886 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:45,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:45,999 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:45,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652852249] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:43:45,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:43:45,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:43:46,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811598156] [2022-11-02 20:43:46,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:46,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:43:46,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:46,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:43:46,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:43:46,006 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 369 out of 466 [2022-11-02 20:43:46,009 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 385 transitions, 876 flow. Second operand has 18 states, 18 states have (on average 371.6111111111111) internal successors, (6689), 18 states have internal predecessors, (6689), 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 20:43:46,009 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:46,009 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 369 of 466 [2022-11-02 20:43:46,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:46,444 INFO L130 PetriNetUnfolder]: 0/536 cut-off events. [2022-11-02 20:43:46,445 INFO L131 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2022-11-02 20:43:46,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 775 conditions, 536 events. 0/536 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1490 event pairs, 0 based on Foata normal form. 4/540 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2022-11-02 20:43:46,446 INFO L137 encePairwiseOnDemand]: 460/466 looper letters, 30 selfloop transitions, 21 changer transitions 0/409 dead transitions. [2022-11-02 20:43:46,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 409 transitions, 1086 flow [2022-11-02 20:43:46,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:43:46,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:43:46,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 7804 transitions. [2022-11-02 20:43:46,453 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7974657674228489 [2022-11-02 20:43:46,453 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 7804 transitions. [2022-11-02 20:43:46,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 7804 transitions. [2022-11-02 20:43:46,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:46,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 7804 transitions. [2022-11-02 20:43:46,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 371.6190476190476) internal successors, (7804), 21 states have internal predecessors, (7804), 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 20:43:46,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 466.0) internal successors, (10252), 22 states have internal predecessors, (10252), 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 20:43:46,473 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 466.0) internal successors, (10252), 22 states have internal predecessors, (10252), 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 20:43:46,474 INFO L175 Difference]: Start difference. First operand has 416 places, 385 transitions, 876 flow. Second operand 21 states and 7804 transitions. [2022-11-02 20:43:46,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 409 transitions, 1086 flow [2022-11-02 20:43:46,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 409 transitions, 1072 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:43:46,483 INFO L231 Difference]: Finished difference. Result has 440 places, 398 transitions, 1000 flow [2022-11-02 20:43:46,483 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=466, PETRI_DIFFERENCE_MINUEND_FLOW=870, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1000, PETRI_PLACES=440, PETRI_TRANSITIONS=398} [2022-11-02 20:43:46,484 INFO L287 CegarLoopForPetriNet]: 415 programPoint places, 25 predicate places. [2022-11-02 20:43:46,484 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 398 transitions, 1000 flow [2022-11-02 20:43:46,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 371.6111111111111) internal successors, (6689), 18 states have internal predecessors, (6689), 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 20:43:46,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:46,486 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:46,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:46,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:46,711 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:46,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:46,711 INFO L85 PathProgramCache]: Analyzing trace with hash -561751517, now seen corresponding path program 1 times [2022-11-02 20:43:46,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:46,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130182440] [2022-11-02 20:43:46,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:46,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:46,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:46,979 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:46,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:46,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130182440] [2022-11-02 20:43:46,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130182440] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:46,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879642949] [2022-11-02 20:43:46,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:46,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:46,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:46,991 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:47,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-02 20:43:47,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:47,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:43:47,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:47,395 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:47,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:47,747 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:47,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879642949] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:43:47,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:43:47,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-02 20:43:47,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94178867] [2022-11-02 20:43:47,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:47,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:43:47,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:47,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:43:47,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:43:47,758 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 369 out of 466 [2022-11-02 20:43:47,764 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 398 transitions, 1000 flow. Second operand has 34 states, 34 states have (on average 371.79411764705884) internal successors, (12641), 34 states have internal predecessors, (12641), 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 20:43:47,765 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:47,765 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 369 of 466 [2022-11-02 20:43:47,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:48,438 INFO L130 PetriNetUnfolder]: 0/470 cut-off events. [2022-11-02 20:43:48,438 INFO L131 PetriNetUnfolder]: For 195/195 co-relation queries the response was YES. [2022-11-02 20:43:48,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 741 conditions, 470 events. 0/470 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1071 event pairs, 0 based on Foata normal form. 6/476 useless extension candidates. Maximal degree in co-relation 0. Up to 21 conditions per place. [2022-11-02 20:43:48,440 INFO L137 encePairwiseOnDemand]: 461/466 looper letters, 39 selfloop transitions, 37 changer transitions 0/424 dead transitions. [2022-11-02 20:43:48,440 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 424 transitions, 1332 flow [2022-11-02 20:43:48,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-02 20:43:48,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-11-02 20:43:48,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 14473 transitions. [2022-11-02 20:43:48,451 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7963574336964895 [2022-11-02 20:43:48,451 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 14473 transitions. [2022-11-02 20:43:48,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 14473 transitions. [2022-11-02 20:43:48,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:48,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 14473 transitions. [2022-11-02 20:43:48,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 371.1025641025641) internal successors, (14473), 39 states have internal predecessors, (14473), 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 20:43:48,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 466.0) internal successors, (18640), 40 states have internal predecessors, (18640), 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 20:43:48,484 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 466.0) internal successors, (18640), 40 states have internal predecessors, (18640), 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 20:43:48,484 INFO L175 Difference]: Start difference. First operand has 440 places, 398 transitions, 1000 flow. Second operand 39 states and 14473 transitions. [2022-11-02 20:43:48,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 424 transitions, 1332 flow [2022-11-02 20:43:48,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 424 transitions, 1254 flow, removed 11 selfloop flow, removed 13 redundant places. [2022-11-02 20:43:48,494 INFO L231 Difference]: Finished difference. Result has 454 places, 402 transitions, 1083 flow [2022-11-02 20:43:48,495 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=466, PETRI_DIFFERENCE_MINUEND_FLOW=919, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1083, PETRI_PLACES=454, PETRI_TRANSITIONS=402} [2022-11-02 20:43:48,496 INFO L287 CegarLoopForPetriNet]: 415 programPoint places, 39 predicate places. [2022-11-02 20:43:48,496 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 402 transitions, 1083 flow [2022-11-02 20:43:48,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 371.79411764705884) internal successors, (12641), 34 states have internal predecessors, (12641), 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 20:43:48,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:48,498 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:43:48,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:48,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:48,726 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:48,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:48,726 INFO L85 PathProgramCache]: Analyzing trace with hash -981893652, now seen corresponding path program 1 times [2022-11-02 20:43:48,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:48,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000351266] [2022-11-02 20:43:48,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:48,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:48,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:43:48,762 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:43:48,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:43:48,818 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:43:48,818 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:43:48,819 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:43:48,819 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:43:48,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-11-02 20:43:48,820 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-02 20:43:48,820 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:43:48,820 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2022-11-02 20:43:48,861 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:43:48,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 444 places, 499 transitions, 1219 flow [2022-11-02 20:43:49,113 INFO L130 PetriNetUnfolder]: 134/962 cut-off events. [2022-11-02 20:43:49,113 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2022-11-02 20:43:49,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1093 conditions, 962 events. 134/962 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 3413 event pairs, 0 based on Foata normal form. 0/800 useless extension candidates. Maximal degree in co-relation 982. Up to 28 conditions per place. [2022-11-02 20:43:49,134 INFO L82 GeneralOperation]: Start removeDead. Operand has 444 places, 499 transitions, 1219 flow [2022-11-02 20:43:49,145 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 444 places, 499 transitions, 1219 flow [2022-11-02 20:43:49,146 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:43:49,147 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;@4e0ca16a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:43:49,147 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:43:49,152 INFO L130 PetriNetUnfolder]: 3/73 cut-off events. [2022-11-02 20:43:49,152 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:43:49,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:49,153 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] [2022-11-02 20:43:49,153 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:49,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:49,153 INFO L85 PathProgramCache]: Analyzing trace with hash 240347298, now seen corresponding path program 1 times [2022-11-02 20:43:49,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:49,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580997078] [2022-11-02 20:43:49,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:49,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:49,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:49,178 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 20:43:49,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:49,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580997078] [2022-11-02 20:43:49,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580997078] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:43:49,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:43:49,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:43:49,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263074429] [2022-11-02 20:43:49,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:43:49,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:43:49,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:49,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:43:49,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:43:49,182 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 396 out of 499 [2022-11-02 20:43:49,183 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 499 transitions, 1219 flow. Second operand has 3 states, 3 states have (on average 397.0) internal successors, (1191), 3 states have internal predecessors, (1191), 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 20:43:49,183 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:49,183 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 396 of 499 [2022-11-02 20:43:49,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:49,537 INFO L130 PetriNetUnfolder]: 0/792 cut-off events. [2022-11-02 20:43:49,537 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2022-11-02 20:43:49,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1006 conditions, 792 events. 0/792 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 3063 event pairs, 0 based on Foata normal form. 2819/3585 useless extension candidates. Maximal degree in co-relation 0. Up to 78 conditions per place. [2022-11-02 20:43:49,539 INFO L137 encePairwiseOnDemand]: 414/499 looper letters, 22 selfloop transitions, 2 changer transitions 11/420 dead transitions. [2022-11-02 20:43:49,539 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 420 transitions, 1109 flow [2022-11-02 20:43:49,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:43:49,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:43:49,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1302 transitions. [2022-11-02 20:43:49,542 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8697394789579158 [2022-11-02 20:43:49,542 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1302 transitions. [2022-11-02 20:43:49,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1302 transitions. [2022-11-02 20:43:49,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:49,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1302 transitions. [2022-11-02 20:43:49,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 434.0) internal successors, (1302), 3 states have internal predecessors, (1302), 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 20:43:49,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 499.0) internal successors, (1996), 4 states have internal predecessors, (1996), 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 20:43:49,546 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 499.0) internal successors, (1996), 4 states have internal predecessors, (1996), 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 20:43:49,546 INFO L175 Difference]: Start difference. First operand has 444 places, 499 transitions, 1219 flow. Second operand 3 states and 1302 transitions. [2022-11-02 20:43:49,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 420 transitions, 1109 flow [2022-11-02 20:43:49,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 420 transitions, 953 flow, removed 78 selfloop flow, removed 0 redundant places. [2022-11-02 20:43:49,555 INFO L231 Difference]: Finished difference. Result has 446 places, 406 transitions, 887 flow [2022-11-02 20:43:49,556 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=897, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=887, PETRI_PLACES=446, PETRI_TRANSITIONS=406} [2022-11-02 20:43:49,557 INFO L287 CegarLoopForPetriNet]: 444 programPoint places, 2 predicate places. [2022-11-02 20:43:49,557 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 406 transitions, 887 flow [2022-11-02 20:43:49,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 397.0) internal successors, (1191), 3 states have internal predecessors, (1191), 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 20:43:49,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:49,558 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] [2022-11-02 20:43:49,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-11-02 20:43:49,558 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:49,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:49,558 INFO L85 PathProgramCache]: Analyzing trace with hash 443938262, now seen corresponding path program 1 times [2022-11-02 20:43:49,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:49,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545193755] [2022-11-02 20:43:49,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:49,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:49,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:49,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:49,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:49,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545193755] [2022-11-02 20:43:49,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545193755] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:49,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423206427] [2022-11-02 20:43:49,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:49,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:49,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:49,608 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:49,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-02 20:43:49,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:49,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:43:49,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:49,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:49,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:49,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:49,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423206427] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:43:49,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:43:49,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:43:49,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152784914] [2022-11-02 20:43:49,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:49,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:43:49,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:49,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:43:49,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:43:49,955 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 395 out of 499 [2022-11-02 20:43:49,957 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 406 transitions, 887 flow. Second operand has 10 states, 10 states have (on average 397.3) internal successors, (3973), 10 states have internal predecessors, (3973), 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 20:43:49,958 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:49,958 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 395 of 499 [2022-11-02 20:43:49,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:50,341 INFO L130 PetriNetUnfolder]: 0/627 cut-off events. [2022-11-02 20:43:50,341 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-11-02 20:43:50,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 802 conditions, 627 events. 0/627 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1953 event pairs, 0 based on Foata normal form. 2/629 useless extension candidates. Maximal degree in co-relation 0. Up to 47 conditions per place. [2022-11-02 20:43:50,343 INFO L137 encePairwiseOnDemand]: 493/499 looper letters, 23 selfloop transitions, 9 changer transitions 0/416 dead transitions. [2022-11-02 20:43:50,343 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 416 transitions, 973 flow [2022-11-02 20:43:50,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:43:50,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:43:50,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3589 transitions. [2022-11-02 20:43:50,348 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7991538632821198 [2022-11-02 20:43:50,348 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3589 transitions. [2022-11-02 20:43:50,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3589 transitions. [2022-11-02 20:43:50,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:50,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3589 transitions. [2022-11-02 20:43:50,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 398.77777777777777) internal successors, (3589), 9 states have internal predecessors, (3589), 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 20:43:50,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 499.0) internal successors, (4990), 10 states have internal predecessors, (4990), 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 20:43:50,361 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 499.0) internal successors, (4990), 10 states have internal predecessors, (4990), 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 20:43:50,362 INFO L175 Difference]: Start difference. First operand has 446 places, 406 transitions, 887 flow. Second operand 9 states and 3589 transitions. [2022-11-02 20:43:50,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 416 transitions, 973 flow [2022-11-02 20:43:50,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 416 transitions, 971 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:43:50,372 INFO L231 Difference]: Finished difference. Result has 445 places, 412 transitions, 935 flow [2022-11-02 20:43:50,373 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=885, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=935, PETRI_PLACES=445, PETRI_TRANSITIONS=412} [2022-11-02 20:43:50,374 INFO L287 CegarLoopForPetriNet]: 444 programPoint places, 1 predicate places. [2022-11-02 20:43:50,374 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 412 transitions, 935 flow [2022-11-02 20:43:50,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 397.3) internal successors, (3973), 10 states have internal predecessors, (3973), 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 20:43:50,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:50,375 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:50,410 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-11-02 20:43:50,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:50,592 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:50,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:50,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1762740737, now seen corresponding path program 1 times [2022-11-02 20:43:50,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:50,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820913512] [2022-11-02 20:43:50,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:50,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:50,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:50,709 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:50,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:50,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820913512] [2022-11-02 20:43:50,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820913512] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:50,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980889746] [2022-11-02 20:43:50,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:50,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:50,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:50,715 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:50,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-02 20:43:50,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:50,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:43:50,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:51,027 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:51,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:51,145 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:51,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980889746] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:43:51,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:43:51,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:43:51,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399343861] [2022-11-02 20:43:51,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:51,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:43:51,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:51,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:43:51,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:43:51,151 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 395 out of 499 [2022-11-02 20:43:51,156 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 412 transitions, 935 flow. Second operand has 18 states, 18 states have (on average 397.6111111111111) internal successors, (7157), 18 states have internal predecessors, (7157), 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 20:43:51,156 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:51,156 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 395 of 499 [2022-11-02 20:43:51,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:51,642 INFO L130 PetriNetUnfolder]: 0/583 cut-off events. [2022-11-02 20:43:51,642 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2022-11-02 20:43:51,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 843 conditions, 583 events. 0/583 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1654 event pairs, 0 based on Foata normal form. 4/587 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2022-11-02 20:43:51,644 INFO L137 encePairwiseOnDemand]: 493/499 looper letters, 31 selfloop transitions, 21 changer transitions 0/436 dead transitions. [2022-11-02 20:43:51,644 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 436 transitions, 1147 flow [2022-11-02 20:43:51,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:43:51,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:43:51,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 8351 transitions. [2022-11-02 20:43:51,651 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7969271877087508 [2022-11-02 20:43:51,651 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 8351 transitions. [2022-11-02 20:43:51,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 8351 transitions. [2022-11-02 20:43:51,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:51,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 8351 transitions. [2022-11-02 20:43:51,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 397.6666666666667) internal successors, (8351), 21 states have internal predecessors, (8351), 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 20:43:51,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 499.0) internal successors, (10978), 22 states have internal predecessors, (10978), 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 20:43:51,671 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 499.0) internal successors, (10978), 22 states have internal predecessors, (10978), 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 20:43:51,671 INFO L175 Difference]: Start difference. First operand has 445 places, 412 transitions, 935 flow. Second operand 21 states and 8351 transitions. [2022-11-02 20:43:51,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 436 transitions, 1147 flow [2022-11-02 20:43:51,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 436 transitions, 1133 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:43:51,681 INFO L231 Difference]: Finished difference. Result has 469 places, 425 transitions, 1059 flow [2022-11-02 20:43:51,681 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=929, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1059, PETRI_PLACES=469, PETRI_TRANSITIONS=425} [2022-11-02 20:43:51,682 INFO L287 CegarLoopForPetriNet]: 444 programPoint places, 25 predicate places. [2022-11-02 20:43:51,682 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 425 transitions, 1059 flow [2022-11-02 20:43:51,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 397.6111111111111) internal successors, (7157), 18 states have internal predecessors, (7157), 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 20:43:51,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:51,684 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:51,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-11-02 20:43:51,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-11-02 20:43:51,899 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:51,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:51,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1765414499, now seen corresponding path program 1 times [2022-11-02 20:43:51,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:51,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811865873] [2022-11-02 20:43:51,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:51,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:51,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:52,161 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:52,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:52,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811865873] [2022-11-02 20:43:52,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811865873] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:52,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375889437] [2022-11-02 20:43:52,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:52,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:52,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:52,165 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:52,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-02 20:43:52,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:52,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:43:52,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:52,639 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:52,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:52,988 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:52,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375889437] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:43:52,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:43:52,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-02 20:43:52,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641508166] [2022-11-02 20:43:52,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:52,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:43:52,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:52,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:43:52,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:43:53,000 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 395 out of 499 [2022-11-02 20:43:53,007 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 425 transitions, 1059 flow. Second operand has 34 states, 34 states have (on average 397.79411764705884) internal successors, (13525), 34 states have internal predecessors, (13525), 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 20:43:53,007 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:53,007 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 395 of 499 [2022-11-02 20:43:53,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:53,773 INFO L130 PetriNetUnfolder]: 0/506 cut-off events. [2022-11-02 20:43:53,773 INFO L131 PetriNetUnfolder]: For 222/222 co-relation queries the response was YES. [2022-11-02 20:43:53,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 799 conditions, 506 events. 0/506 cut-off events. For 222/222 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1169 event pairs, 0 based on Foata normal form. 7/513 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2022-11-02 20:43:53,775 INFO L137 encePairwiseOnDemand]: 494/499 looper letters, 42 selfloop transitions, 40 changer transitions 0/456 dead transitions. [2022-11-02 20:43:53,775 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 456 transitions, 1437 flow [2022-11-02 20:43:53,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-02 20:43:53,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-11-02 20:43:53,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 16679 transitions. [2022-11-02 20:43:53,787 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7958297547475904 [2022-11-02 20:43:53,787 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 16679 transitions. [2022-11-02 20:43:53,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 16679 transitions. [2022-11-02 20:43:53,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:53,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 16679 transitions. [2022-11-02 20:43:53,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 397.1190476190476) internal successors, (16679), 42 states have internal predecessors, (16679), 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 20:43:53,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 499.0) internal successors, (21457), 43 states have internal predecessors, (21457), 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 20:43:53,828 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 499.0) internal successors, (21457), 43 states have internal predecessors, (21457), 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 20:43:53,829 INFO L175 Difference]: Start difference. First operand has 469 places, 425 transitions, 1059 flow. Second operand 42 states and 16679 transitions. [2022-11-02 20:43:53,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 456 transitions, 1437 flow [2022-11-02 20:43:53,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 456 transitions, 1353 flow, removed 12 selfloop flow, removed 13 redundant places. [2022-11-02 20:43:53,842 INFO L231 Difference]: Finished difference. Result has 486 places, 432 transitions, 1166 flow [2022-11-02 20:43:53,843 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=978, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=1166, PETRI_PLACES=486, PETRI_TRANSITIONS=432} [2022-11-02 20:43:53,843 INFO L287 CegarLoopForPetriNet]: 444 programPoint places, 42 predicate places. [2022-11-02 20:43:53,843 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 432 transitions, 1166 flow [2022-11-02 20:43:53,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 397.79411764705884) internal successors, (13525), 34 states have internal predecessors, (13525), 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 20:43:53,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:53,846 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:43:53,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:54,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:54,062 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:54,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:54,062 INFO L85 PathProgramCache]: Analyzing trace with hash -639908372, now seen corresponding path program 1 times [2022-11-02 20:43:54,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:54,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610012856] [2022-11-02 20:43:54,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:54,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:54,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:43:54,100 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:43:54,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:43:54,148 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:43:54,149 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:43:54,149 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:43:54,149 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:43:54,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-11-02 20:43:54,149 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-02 20:43:54,150 WARN L233 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:43:54,150 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2022-11-02 20:43:54,206 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:43:54,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 473 places, 532 transitions, 1316 flow [2022-11-02 20:43:54,535 INFO L130 PetriNetUnfolder]: 144/1031 cut-off events. [2022-11-02 20:43:54,535 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2022-11-02 20:43:54,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1179 conditions, 1031 events. 144/1031 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 3666 event pairs, 0 based on Foata normal form. 0/857 useless extension candidates. Maximal degree in co-relation 1065. Up to 30 conditions per place. [2022-11-02 20:43:54,555 INFO L82 GeneralOperation]: Start removeDead. Operand has 473 places, 532 transitions, 1316 flow [2022-11-02 20:43:54,564 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 473 places, 532 transitions, 1316 flow [2022-11-02 20:43:54,565 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:43:54,565 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;@4e0ca16a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:43:54,565 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:43:54,571 INFO L130 PetriNetUnfolder]: 5/81 cut-off events. [2022-11-02 20:43:54,572 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:43:54,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:54,572 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] [2022-11-02 20:43:54,572 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:54,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:54,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1576976290, now seen corresponding path program 1 times [2022-11-02 20:43:54,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:54,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65235578] [2022-11-02 20:43:54,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:54,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:54,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:54,598 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 20:43:54,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:54,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65235578] [2022-11-02 20:43:54,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65235578] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:43:54,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:43:54,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:43:54,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196093784] [2022-11-02 20:43:54,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:43:54,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:43:54,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:54,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:43:54,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:43:54,602 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 422 out of 532 [2022-11-02 20:43:54,603 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 532 transitions, 1316 flow. Second operand has 3 states, 3 states have (on average 423.0) internal successors, (1269), 3 states have internal predecessors, (1269), 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 20:43:54,603 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:54,603 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 422 of 532 [2022-11-02 20:43:54,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:54,914 INFO L130 PetriNetUnfolder]: 0/850 cut-off events. [2022-11-02 20:43:54,915 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2022-11-02 20:43:54,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1087 conditions, 850 events. 0/850 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 3314 event pairs, 0 based on Foata normal form. 3286/4108 useless extension candidates. Maximal degree in co-relation 0. Up to 84 conditions per place. [2022-11-02 20:43:54,917 INFO L137 encePairwiseOnDemand]: 441/532 looper letters, 23 selfloop transitions, 2 changer transitions 11/447 dead transitions. [2022-11-02 20:43:54,917 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 447 transitions, 1196 flow [2022-11-02 20:43:54,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:43:54,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:43:54,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1387 transitions. [2022-11-02 20:43:54,919 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8690476190476191 [2022-11-02 20:43:54,919 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1387 transitions. [2022-11-02 20:43:54,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1387 transitions. [2022-11-02 20:43:54,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:54,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1387 transitions. [2022-11-02 20:43:54,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 462.3333333333333) internal successors, (1387), 3 states have internal predecessors, (1387), 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 20:43:54,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 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 20:43:54,923 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 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 20:43:54,924 INFO L175 Difference]: Start difference. First operand has 473 places, 532 transitions, 1316 flow. Second operand 3 states and 1387 transitions. [2022-11-02 20:43:54,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 447 transitions, 1196 flow [2022-11-02 20:43:54,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 447 transitions, 1014 flow, removed 91 selfloop flow, removed 0 redundant places. [2022-11-02 20:43:54,933 INFO L231 Difference]: Finished difference. Result has 475 places, 433 transitions, 946 flow [2022-11-02 20:43:54,934 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=956, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=946, PETRI_PLACES=475, PETRI_TRANSITIONS=433} [2022-11-02 20:43:54,934 INFO L287 CegarLoopForPetriNet]: 473 programPoint places, 2 predicate places. [2022-11-02 20:43:54,935 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 433 transitions, 946 flow [2022-11-02 20:43:54,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 423.0) internal successors, (1269), 3 states have internal predecessors, (1269), 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 20:43:54,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:54,935 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] [2022-11-02 20:43:54,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-11-02 20:43:54,936 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:54,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:54,936 INFO L85 PathProgramCache]: Analyzing trace with hash 497768822, now seen corresponding path program 1 times [2022-11-02 20:43:54,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:54,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416801849] [2022-11-02 20:43:54,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:54,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:54,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:54,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:54,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:54,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416801849] [2022-11-02 20:43:54,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416801849] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:54,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647481989] [2022-11-02 20:43:54,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:54,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:54,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:54,983 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:55,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-02 20:43:55,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:55,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:43:55,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:55,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:55,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:55,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:55,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647481989] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:43:55,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:43:55,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:43:55,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048303226] [2022-11-02 20:43:55,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:55,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:43:55,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:55,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:43:55,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:43:55,376 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 421 out of 532 [2022-11-02 20:43:55,379 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 433 transitions, 946 flow. Second operand has 10 states, 10 states have (on average 423.3) internal successors, (4233), 10 states have internal predecessors, (4233), 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 20:43:55,379 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:55,379 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 421 of 532 [2022-11-02 20:43:55,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:55,726 INFO L130 PetriNetUnfolder]: 0/674 cut-off events. [2022-11-02 20:43:55,726 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-02 20:43:55,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 862 conditions, 674 events. 0/674 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2112 event pairs, 0 based on Foata normal form. 2/676 useless extension candidates. Maximal degree in co-relation 0. Up to 51 conditions per place. [2022-11-02 20:43:55,727 INFO L137 encePairwiseOnDemand]: 526/532 looper letters, 24 selfloop transitions, 9 changer transitions 0/443 dead transitions. [2022-11-02 20:43:55,728 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 443 transitions, 1034 flow [2022-11-02 20:43:55,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:43:55,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:43:55,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3824 transitions. [2022-11-02 20:43:55,731 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7986633249791144 [2022-11-02 20:43:55,731 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3824 transitions. [2022-11-02 20:43:55,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3824 transitions. [2022-11-02 20:43:55,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:55,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3824 transitions. [2022-11-02 20:43:55,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 424.8888888888889) internal successors, (3824), 9 states have internal predecessors, (3824), 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 20:43:55,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 532.0) internal successors, (5320), 10 states have internal predecessors, (5320), 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 20:43:55,740 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 532.0) internal successors, (5320), 10 states have internal predecessors, (5320), 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 20:43:55,740 INFO L175 Difference]: Start difference. First operand has 475 places, 433 transitions, 946 flow. Second operand 9 states and 3824 transitions. [2022-11-02 20:43:55,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 443 transitions, 1034 flow [2022-11-02 20:43:55,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 443 transitions, 1032 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:43:55,750 INFO L231 Difference]: Finished difference. Result has 474 places, 439 transitions, 994 flow [2022-11-02 20:43:55,750 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=944, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=994, PETRI_PLACES=474, PETRI_TRANSITIONS=439} [2022-11-02 20:43:55,751 INFO L287 CegarLoopForPetriNet]: 473 programPoint places, 1 predicate places. [2022-11-02 20:43:55,751 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 439 transitions, 994 flow [2022-11-02 20:43:55,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 423.3) internal successors, (4233), 10 states have internal predecessors, (4233), 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 20:43:55,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:55,752 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:55,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:55,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:55,963 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:55,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:55,963 INFO L85 PathProgramCache]: Analyzing trace with hash 407301857, now seen corresponding path program 1 times [2022-11-02 20:43:55,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:55,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482170697] [2022-11-02 20:43:55,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:55,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:55,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:56,061 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:56,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:56,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482170697] [2022-11-02 20:43:56,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482170697] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:56,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451200047] [2022-11-02 20:43:56,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:56,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:56,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:56,063 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:56,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-02 20:43:56,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:56,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:43:56,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:56,411 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:56,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:56,520 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:56,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451200047] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:43:56,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:43:56,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:43:56,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999466329] [2022-11-02 20:43:56,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:56,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:43:56,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:56,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:43:56,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:43:56,529 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 421 out of 532 [2022-11-02 20:43:56,533 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 439 transitions, 994 flow. Second operand has 18 states, 18 states have (on average 423.6111111111111) internal successors, (7625), 18 states have internal predecessors, (7625), 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 20:43:56,533 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:56,534 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 421 of 532 [2022-11-02 20:43:56,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:56,953 INFO L130 PetriNetUnfolder]: 0/630 cut-off events. [2022-11-02 20:43:56,953 INFO L131 PetriNetUnfolder]: For 78/78 co-relation queries the response was YES. [2022-11-02 20:43:56,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 911 conditions, 630 events. 0/630 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1824 event pairs, 0 based on Foata normal form. 4/634 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2022-11-02 20:43:56,955 INFO L137 encePairwiseOnDemand]: 526/532 looper letters, 32 selfloop transitions, 21 changer transitions 0/463 dead transitions. [2022-11-02 20:43:56,955 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 463 transitions, 1208 flow [2022-11-02 20:43:56,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:43:56,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:43:56,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 8898 transitions. [2022-11-02 20:43:56,961 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7964554242749732 [2022-11-02 20:43:56,961 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 8898 transitions. [2022-11-02 20:43:56,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 8898 transitions. [2022-11-02 20:43:56,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:56,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 8898 transitions. [2022-11-02 20:43:56,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 423.7142857142857) internal successors, (8898), 21 states have internal predecessors, (8898), 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 20:43:56,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 532.0) internal successors, (11704), 22 states have internal predecessors, (11704), 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 20:43:56,975 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 532.0) internal successors, (11704), 22 states have internal predecessors, (11704), 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 20:43:56,975 INFO L175 Difference]: Start difference. First operand has 474 places, 439 transitions, 994 flow. Second operand 21 states and 8898 transitions. [2022-11-02 20:43:56,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 463 transitions, 1208 flow [2022-11-02 20:43:56,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 463 transitions, 1194 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:43:56,986 INFO L231 Difference]: Finished difference. Result has 498 places, 452 transitions, 1118 flow [2022-11-02 20:43:56,987 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=988, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1118, PETRI_PLACES=498, PETRI_TRANSITIONS=452} [2022-11-02 20:43:56,987 INFO L287 CegarLoopForPetriNet]: 473 programPoint places, 25 predicate places. [2022-11-02 20:43:56,987 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 452 transitions, 1118 flow [2022-11-02 20:43:56,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 423.6111111111111) internal successors, (7625), 18 states have internal predecessors, (7625), 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 20:43:56,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:56,989 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:57,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:57,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:57,199 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:57,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:57,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1073274307, now seen corresponding path program 1 times [2022-11-02 20:43:57,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:57,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387102868] [2022-11-02 20:43:57,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:57,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:57,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:57,459 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:57,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:57,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387102868] [2022-11-02 20:43:57,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387102868] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:57,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950968971] [2022-11-02 20:43:57,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:57,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:57,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:57,461 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:57,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-02 20:43:57,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:57,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:43:57,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:57,855 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:57,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:58,167 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:58,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950968971] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:43:58,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:43:58,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-02 20:43:58,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027359836] [2022-11-02 20:43:58,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:58,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:43:58,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:58,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:43:58,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:43:58,184 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 421 out of 532 [2022-11-02 20:43:58,197 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 452 transitions, 1118 flow. Second operand has 34 states, 34 states have (on average 423.79411764705884) internal successors, (14409), 34 states have internal predecessors, (14409), 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 20:43:58,197 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:58,197 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 421 of 532 [2022-11-02 20:43:58,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:59,064 INFO L130 PetriNetUnfolder]: 0/542 cut-off events. [2022-11-02 20:43:59,064 INFO L131 PetriNetUnfolder]: For 249/249 co-relation queries the response was YES. [2022-11-02 20:43:59,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 857 conditions, 542 events. 0/542 cut-off events. For 249/249 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1267 event pairs, 0 based on Foata normal form. 8/550 useless extension candidates. Maximal degree in co-relation 0. Up to 25 conditions per place. [2022-11-02 20:43:59,065 INFO L137 encePairwiseOnDemand]: 527/532 looper letters, 45 selfloop transitions, 43 changer transitions 0/488 dead transitions. [2022-11-02 20:43:59,065 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 488 transitions, 1542 flow [2022-11-02 20:43:59,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-02 20:43:59,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-02 20:43:59,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 19041 transitions. [2022-11-02 20:43:59,075 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7953634085213033 [2022-11-02 20:43:59,075 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 19041 transitions. [2022-11-02 20:43:59,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 19041 transitions. [2022-11-02 20:43:59,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:59,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 19041 transitions. [2022-11-02 20:43:59,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 423.1333333333333) internal successors, (19041), 45 states have internal predecessors, (19041), 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 20:43:59,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 532.0) internal successors, (24472), 46 states have internal predecessors, (24472), 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 20:43:59,103 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 532.0) internal successors, (24472), 46 states have internal predecessors, (24472), 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 20:43:59,103 INFO L175 Difference]: Start difference. First operand has 498 places, 452 transitions, 1118 flow. Second operand 45 states and 19041 transitions. [2022-11-02 20:43:59,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 488 transitions, 1542 flow [2022-11-02 20:43:59,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 488 transitions, 1452 flow, removed 13 selfloop flow, removed 13 redundant places. [2022-11-02 20:43:59,115 INFO L231 Difference]: Finished difference. Result has 518 places, 462 transitions, 1249 flow [2022-11-02 20:43:59,116 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=1037, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1249, PETRI_PLACES=518, PETRI_TRANSITIONS=462} [2022-11-02 20:43:59,116 INFO L287 CegarLoopForPetriNet]: 473 programPoint places, 45 predicate places. [2022-11-02 20:43:59,116 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 462 transitions, 1249 flow [2022-11-02 20:43:59,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 423.79411764705884) internal successors, (14409), 34 states have internal predecessors, (14409), 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 20:43:59,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:59,119 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:43:59,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-11-02 20:43:59,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:59,323 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:59,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:59,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1626722253, now seen corresponding path program 1 times [2022-11-02 20:43:59,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:59,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368798816] [2022-11-02 20:43:59,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:59,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:59,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:43:59,354 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:43:59,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:43:59,400 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:43:59,400 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:43:59,401 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:43:59,401 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:43:59,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-11-02 20:43:59,401 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-02 20:43:59,402 WARN L233 ceAbstractionStarter]: 14 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:43:59,402 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 15 thread instances. [2022-11-02 20:43:59,448 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:43:59,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 502 places, 565 transitions, 1415 flow [2022-11-02 20:43:59,827 INFO L130 PetriNetUnfolder]: 154/1100 cut-off events. [2022-11-02 20:43:59,827 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2022-11-02 20:43:59,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1266 conditions, 1100 events. 154/1100 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 3963 event pairs, 0 based on Foata normal form. 0/914 useless extension candidates. Maximal degree in co-relation 1151. Up to 32 conditions per place. [2022-11-02 20:43:59,865 INFO L82 GeneralOperation]: Start removeDead. Operand has 502 places, 565 transitions, 1415 flow [2022-11-02 20:43:59,878 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 502 places, 565 transitions, 1415 flow [2022-11-02 20:43:59,879 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:43:59,879 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;@4e0ca16a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:43:59,879 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:43:59,884 INFO L130 PetriNetUnfolder]: 3/74 cut-off events. [2022-11-02 20:43:59,884 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:43:59,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:59,884 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] [2022-11-02 20:43:59,884 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:43:59,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:59,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1455225183, now seen corresponding path program 1 times [2022-11-02 20:43:59,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:59,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586174222] [2022-11-02 20:43:59,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:59,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:59,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:59,900 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 20:43:59,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:59,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586174222] [2022-11-02 20:43:59,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586174222] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:43:59,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:43:59,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:43:59,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340854968] [2022-11-02 20:43:59,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:43:59,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:43:59,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:59,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:43:59,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:43:59,903 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 455 out of 565 [2022-11-02 20:43:59,904 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 565 transitions, 1415 flow. Second operand has 2 states, 2 states have (on average 455.5) internal successors, (911), 2 states have internal predecessors, (911), 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 20:43:59,904 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:59,904 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 455 of 565 [2022-11-02 20:43:59,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:00,225 INFO L130 PetriNetUnfolder]: 0/930 cut-off events. [2022-11-02 20:44:00,226 INFO L131 PetriNetUnfolder]: For 785/785 co-relation queries the response was YES. [2022-11-02 20:44:00,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1112 conditions, 930 events. 0/930 cut-off events. For 785/785 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3633 event pairs, 0 based on Foata normal form. 702/1600 useless extension candidates. Maximal degree in co-relation 0. Up to 16 conditions per place. [2022-11-02 20:44:00,228 INFO L137 encePairwiseOnDemand]: 471/565 looper letters, 15 selfloop transitions, 0 changer transitions 11/470 dead transitions. [2022-11-02 20:44:00,228 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 470 transitions, 1255 flow [2022-11-02 20:44:00,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:44:00,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:44:00,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1019 transitions. [2022-11-02 20:44:00,230 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9017699115044248 [2022-11-02 20:44:00,230 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1019 transitions. [2022-11-02 20:44:00,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1019 transitions. [2022-11-02 20:44:00,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:00,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1019 transitions. [2022-11-02 20:44:00,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 509.5) internal successors, (1019), 2 states have internal predecessors, (1019), 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 20:44:00,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 565.0) internal successors, (1695), 3 states have internal predecessors, (1695), 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 20:44:00,233 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 565.0) internal successors, (1695), 3 states have internal predecessors, (1695), 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 20:44:00,233 INFO L175 Difference]: Start difference. First operand has 502 places, 565 transitions, 1415 flow. Second operand 2 states and 1019 transitions. [2022-11-02 20:44:00,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 470 transitions, 1255 flow [2022-11-02 20:44:00,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 470 transitions, 1045 flow, removed 105 selfloop flow, removed 0 redundant places. [2022-11-02 20:44:00,243 INFO L231 Difference]: Finished difference. Result has 502 places, 459 transitions, 993 flow [2022-11-02 20:44:00,244 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=565, PETRI_DIFFERENCE_MINUEND_FLOW=1015, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=993, PETRI_PLACES=502, PETRI_TRANSITIONS=459} [2022-11-02 20:44:00,244 INFO L287 CegarLoopForPetriNet]: 502 programPoint places, 0 predicate places. [2022-11-02 20:44:00,244 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 459 transitions, 993 flow [2022-11-02 20:44:00,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 455.5) internal successors, (911), 2 states have internal predecessors, (911), 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 20:44:00,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:00,245 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] [2022-11-02 20:44:00,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-11-02 20:44:00,245 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:00,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:00,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1042790754, now seen corresponding path program 1 times [2022-11-02 20:44:00,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:00,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816675638] [2022-11-02 20:44:00,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:00,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:00,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:00,271 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 20:44:00,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:00,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816675638] [2022-11-02 20:44:00,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816675638] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:44:00,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:44:00,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:44:00,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020820981] [2022-11-02 20:44:00,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:00,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:44:00,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:00,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:44:00,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:44:00,274 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 448 out of 565 [2022-11-02 20:44:00,275 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 459 transitions, 993 flow. Second operand has 3 states, 3 states have (on average 449.0) internal successors, (1347), 3 states have internal predecessors, (1347), 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 20:44:00,275 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:00,275 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 448 of 565 [2022-11-02 20:44:00,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:00,615 INFO L130 PetriNetUnfolder]: 0/743 cut-off events. [2022-11-02 20:44:00,615 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-11-02 20:44:00,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 900 conditions, 743 events. 0/743 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2411 event pairs, 0 based on Foata normal form. 0/728 useless extension candidates. Maximal degree in co-relation 0. Up to 90 conditions per place. [2022-11-02 20:44:00,617 INFO L137 encePairwiseOnDemand]: 562/565 looper letters, 24 selfloop transitions, 2 changer transitions 0/463 dead transitions. [2022-11-02 20:44:00,617 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 463 transitions, 1053 flow [2022-11-02 20:44:00,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:44:00,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:44:00,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1371 transitions. [2022-11-02 20:44:00,619 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8088495575221238 [2022-11-02 20:44:00,619 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1371 transitions. [2022-11-02 20:44:00,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1371 transitions. [2022-11-02 20:44:00,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:00,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1371 transitions. [2022-11-02 20:44:00,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 457.0) internal successors, (1371), 3 states have internal predecessors, (1371), 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 20:44:00,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 565.0) internal successors, (2260), 4 states have internal predecessors, (2260), 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 20:44:00,623 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 565.0) internal successors, (2260), 4 states have internal predecessors, (2260), 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 20:44:00,623 INFO L175 Difference]: Start difference. First operand has 502 places, 459 transitions, 993 flow. Second operand 3 states and 1371 transitions. [2022-11-02 20:44:00,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 463 transitions, 1053 flow [2022-11-02 20:44:00,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 463 transitions, 1053 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:44:00,631 INFO L231 Difference]: Finished difference. Result has 494 places, 460 transitions, 1005 flow [2022-11-02 20:44:00,632 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=565, PETRI_DIFFERENCE_MINUEND_FLOW=993, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1005, PETRI_PLACES=494, PETRI_TRANSITIONS=460} [2022-11-02 20:44:00,633 INFO L287 CegarLoopForPetriNet]: 502 programPoint places, -8 predicate places. [2022-11-02 20:44:00,633 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 460 transitions, 1005 flow [2022-11-02 20:44:00,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 449.0) internal successors, (1347), 3 states have internal predecessors, (1347), 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 20:44:00,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:00,633 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] [2022-11-02 20:44:00,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-11-02 20:44:00,634 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:00,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:00,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1743828086, now seen corresponding path program 1 times [2022-11-02 20:44:00,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:00,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101328982] [2022-11-02 20:44:00,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:00,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:00,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:00,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:00,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:00,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101328982] [2022-11-02 20:44:00,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101328982] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:00,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738009346] [2022-11-02 20:44:00,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:00,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:00,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:00,679 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:00,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-02 20:44:01,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:01,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:44:01,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:01,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:01,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:01,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:01,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738009346] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:44:01,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:44:01,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:44:01,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715701513] [2022-11-02 20:44:01,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:01,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:44:01,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:01,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:44:01,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:44:01,114 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 447 out of 565 [2022-11-02 20:44:01,116 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 460 transitions, 1005 flow. Second operand has 10 states, 10 states have (on average 449.3) internal successors, (4493), 10 states have internal predecessors, (4493), 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 20:44:01,116 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:01,117 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 447 of 565 [2022-11-02 20:44:01,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:01,517 INFO L130 PetriNetUnfolder]: 0/721 cut-off events. [2022-11-02 20:44:01,518 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-02 20:44:01,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 923 conditions, 721 events. 0/721 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2282 event pairs, 0 based on Foata normal form. 2/723 useless extension candidates. Maximal degree in co-relation 0. Up to 55 conditions per place. [2022-11-02 20:44:01,519 INFO L137 encePairwiseOnDemand]: 559/565 looper letters, 25 selfloop transitions, 9 changer transitions 0/470 dead transitions. [2022-11-02 20:44:01,519 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 470 transitions, 1095 flow [2022-11-02 20:44:01,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:44:01,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:44:01,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4059 transitions. [2022-11-02 20:44:01,523 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7982300884955752 [2022-11-02 20:44:01,523 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4059 transitions. [2022-11-02 20:44:01,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4059 transitions. [2022-11-02 20:44:01,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:01,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4059 transitions. [2022-11-02 20:44:01,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 451.0) internal successors, (4059), 9 states have internal predecessors, (4059), 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 20:44:01,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 565.0) internal successors, (5650), 10 states have internal predecessors, (5650), 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 20:44:01,533 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 565.0) internal successors, (5650), 10 states have internal predecessors, (5650), 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 20:44:01,533 INFO L175 Difference]: Start difference. First operand has 494 places, 460 transitions, 1005 flow. Second operand 9 states and 4059 transitions. [2022-11-02 20:44:01,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 470 transitions, 1095 flow [2022-11-02 20:44:01,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 470 transitions, 1093 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:44:01,539 INFO L231 Difference]: Finished difference. Result has 504 places, 466 transitions, 1053 flow [2022-11-02 20:44:01,540 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=565, PETRI_DIFFERENCE_MINUEND_FLOW=1003, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1053, PETRI_PLACES=504, PETRI_TRANSITIONS=466} [2022-11-02 20:44:01,540 INFO L287 CegarLoopForPetriNet]: 502 programPoint places, 2 predicate places. [2022-11-02 20:44:01,541 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 466 transitions, 1053 flow [2022-11-02 20:44:01,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 449.3) internal successors, (4493), 10 states have internal predecessors, (4493), 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 20:44:01,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:01,542 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:01,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:01,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-11-02 20:44:01,752 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:01,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:01,753 INFO L85 PathProgramCache]: Analyzing trace with hash 435117153, now seen corresponding path program 1 times [2022-11-02 20:44:01,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:01,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352573253] [2022-11-02 20:44:01,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:01,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:01,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:01,846 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:01,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:01,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352573253] [2022-11-02 20:44:01,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352573253] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:01,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555103786] [2022-11-02 20:44:01,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:01,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:01,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:01,848 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:01,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-02 20:44:02,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:02,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:44:02,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:02,200 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:02,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:02,303 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:02,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555103786] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:44:02,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:44:02,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:44:02,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392607078] [2022-11-02 20:44:02,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:02,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:44:02,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:02,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:44:02,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:44:02,309 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 447 out of 565 [2022-11-02 20:44:02,312 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 466 transitions, 1053 flow. Second operand has 18 states, 18 states have (on average 449.6111111111111) internal successors, (8093), 18 states have internal predecessors, (8093), 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 20:44:02,312 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:02,313 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 447 of 565 [2022-11-02 20:44:02,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:02,819 INFO L130 PetriNetUnfolder]: 0/677 cut-off events. [2022-11-02 20:44:02,819 INFO L131 PetriNetUnfolder]: For 84/84 co-relation queries the response was YES. [2022-11-02 20:44:02,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 980 conditions, 677 events. 0/677 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2001 event pairs, 0 based on Foata normal form. 4/681 useless extension candidates. Maximal degree in co-relation 0. Up to 39 conditions per place. [2022-11-02 20:44:02,821 INFO L137 encePairwiseOnDemand]: 559/565 looper letters, 33 selfloop transitions, 21 changer transitions 0/490 dead transitions. [2022-11-02 20:44:02,821 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 490 transitions, 1269 flow [2022-11-02 20:44:02,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:44:02,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:44:02,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 9445 transitions. [2022-11-02 20:44:02,827 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7960387694900969 [2022-11-02 20:44:02,827 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 9445 transitions. [2022-11-02 20:44:02,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 9445 transitions. [2022-11-02 20:44:02,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:02,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 9445 transitions. [2022-11-02 20:44:02,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 449.76190476190476) internal successors, (9445), 21 states have internal predecessors, (9445), 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 20:44:02,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 565.0) internal successors, (12430), 22 states have internal predecessors, (12430), 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 20:44:02,843 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 565.0) internal successors, (12430), 22 states have internal predecessors, (12430), 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 20:44:02,843 INFO L175 Difference]: Start difference. First operand has 504 places, 466 transitions, 1053 flow. Second operand 21 states and 9445 transitions. [2022-11-02 20:44:02,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 490 transitions, 1269 flow [2022-11-02 20:44:02,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 490 transitions, 1255 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:44:02,855 INFO L231 Difference]: Finished difference. Result has 528 places, 479 transitions, 1177 flow [2022-11-02 20:44:02,855 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=565, PETRI_DIFFERENCE_MINUEND_FLOW=1047, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1177, PETRI_PLACES=528, PETRI_TRANSITIONS=479} [2022-11-02 20:44:02,856 INFO L287 CegarLoopForPetriNet]: 502 programPoint places, 26 predicate places. [2022-11-02 20:44:02,856 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 479 transitions, 1177 flow [2022-11-02 20:44:02,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 449.6111111111111) internal successors, (8093), 18 states have internal predecessors, (8093), 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 20:44:02,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:02,857 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:02,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:03,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-11-02 20:44:03,063 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:03,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:03,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1656795203, now seen corresponding path program 1 times [2022-11-02 20:44:03,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:03,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424129693] [2022-11-02 20:44:03,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:03,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:03,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:03,320 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:03,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:03,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424129693] [2022-11-02 20:44:03,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424129693] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:03,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351999773] [2022-11-02 20:44:03,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:03,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:03,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:03,323 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:03,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-02 20:44:03,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:03,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:44:03,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:03,791 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:03,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:04,111 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:04,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351999773] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:44:04,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:44:04,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-02 20:44:04,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810661698] [2022-11-02 20:44:04,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:04,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:44:04,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:04,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:44:04,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:44:04,124 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 447 out of 565 [2022-11-02 20:44:04,155 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 479 transitions, 1177 flow. Second operand has 34 states, 34 states have (on average 449.79411764705884) internal successors, (15293), 34 states have internal predecessors, (15293), 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 20:44:04,156 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:04,157 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 447 of 565 [2022-11-02 20:44:04,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:05,027 INFO L130 PetriNetUnfolder]: 0/589 cut-off events. [2022-11-02 20:44:05,028 INFO L131 PetriNetUnfolder]: For 276/276 co-relation queries the response was YES. [2022-11-02 20:44:05,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 935 conditions, 589 events. 0/589 cut-off events. For 276/276 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1419 event pairs, 0 based on Foata normal form. 8/597 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2022-11-02 20:44:05,029 INFO L137 encePairwiseOnDemand]: 559/565 looper letters, 49 selfloop transitions, 45 changer transitions 0/530 dead transitions. [2022-11-02 20:44:05,029 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 572 places, 530 transitions, 1681 flow [2022-11-02 20:44:05,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-02 20:44:05,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-02 20:44:05,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 20217 transitions. [2022-11-02 20:44:05,041 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7951622418879056 [2022-11-02 20:44:05,041 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 20217 transitions. [2022-11-02 20:44:05,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 20217 transitions. [2022-11-02 20:44:05,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:05,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 20217 transitions. [2022-11-02 20:44:05,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 449.26666666666665) internal successors, (20217), 45 states have internal predecessors, (20217), 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 20:44:05,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 565.0) internal successors, (25990), 46 states have internal predecessors, (25990), 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 20:44:05,069 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 565.0) internal successors, (25990), 46 states have internal predecessors, (25990), 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 20:44:05,069 INFO L175 Difference]: Start difference. First operand has 528 places, 479 transitions, 1177 flow. Second operand 45 states and 20217 transitions. [2022-11-02 20:44:05,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 572 places, 530 transitions, 1681 flow [2022-11-02 20:44:05,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 566 places, 530 transitions, 1641 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-02 20:44:05,078 INFO L231 Difference]: Finished difference. Result has 575 places, 504 transitions, 1455 flow [2022-11-02 20:44:05,078 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=565, PETRI_DIFFERENCE_MINUEND_FLOW=1153, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1455, PETRI_PLACES=575, PETRI_TRANSITIONS=504} [2022-11-02 20:44:05,078 INFO L287 CegarLoopForPetriNet]: 502 programPoint places, 73 predicate places. [2022-11-02 20:44:05,078 INFO L495 AbstractCegarLoop]: Abstraction has has 575 places, 504 transitions, 1455 flow [2022-11-02 20:44:05,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 449.79411764705884) internal successors, (15293), 34 states have internal predecessors, (15293), 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 20:44:05,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:05,080 INFO L208 CegarLoopForPetriNet]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:05,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:05,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-11-02 20:44:05,281 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:05,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:05,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1018229807, now seen corresponding path program 1 times [2022-11-02 20:44:05,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:05,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219602659] [2022-11-02 20:44:05,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:05,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:05,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:44:05,311 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:44:05,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:44:05,358 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:44:05,359 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:44:05,359 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:44:05,359 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:44:05,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-11-02 20:44:05,359 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-02 20:44:05,360 WARN L233 ceAbstractionStarter]: 15 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:44:05,360 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 16 thread instances. [2022-11-02 20:44:05,413 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:44:05,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 531 places, 598 transitions, 1516 flow [2022-11-02 20:44:05,741 INFO L130 PetriNetUnfolder]: 164/1169 cut-off events. [2022-11-02 20:44:05,741 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2022-11-02 20:44:05,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1354 conditions, 1169 events. 164/1169 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 4211 event pairs, 0 based on Foata normal form. 0/971 useless extension candidates. Maximal degree in co-relation 1238. Up to 34 conditions per place. [2022-11-02 20:44:05,785 INFO L82 GeneralOperation]: Start removeDead. Operand has 531 places, 598 transitions, 1516 flow [2022-11-02 20:44:05,800 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 531 places, 598 transitions, 1516 flow [2022-11-02 20:44:05,800 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:44:05,801 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;@4e0ca16a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:44:05,801 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:44:05,826 INFO L130 PetriNetUnfolder]: 5/81 cut-off events. [2022-11-02 20:44:05,826 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:44:05,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:05,826 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] [2022-11-02 20:44:05,826 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:05,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:05,827 INFO L85 PathProgramCache]: Analyzing trace with hash 434742049, now seen corresponding path program 1 times [2022-11-02 20:44:05,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:05,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469897068] [2022-11-02 20:44:05,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:05,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:05,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:05,838 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 20:44:05,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:05,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469897068] [2022-11-02 20:44:05,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469897068] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:44:05,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:44:05,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:44:05,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961864208] [2022-11-02 20:44:05,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:05,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:44:05,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:05,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:44:05,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:44:05,840 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 481 out of 598 [2022-11-02 20:44:05,841 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 598 transitions, 1516 flow. Second operand has 2 states, 2 states have (on average 481.5) internal successors, (963), 2 states have internal predecessors, (963), 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 20:44:05,841 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:05,841 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 481 of 598 [2022-11-02 20:44:05,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:06,201 INFO L130 PetriNetUnfolder]: 0/988 cut-off events. [2022-11-02 20:44:06,201 INFO L131 PetriNetUnfolder]: For 936/936 co-relation queries the response was YES. [2022-11-02 20:44:06,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1190 conditions, 988 events. 0/988 cut-off events. For 936/936 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3864 event pairs, 0 based on Foata normal form. 796/1750 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2022-11-02 20:44:06,203 INFO L137 encePairwiseOnDemand]: 498/598 looper letters, 16 selfloop transitions, 0 changer transitions 11/497 dead transitions. [2022-11-02 20:44:06,203 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 497 transitions, 1346 flow [2022-11-02 20:44:06,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:44:06,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:44:06,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1078 transitions. [2022-11-02 20:44:06,205 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9013377926421404 [2022-11-02 20:44:06,205 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1078 transitions. [2022-11-02 20:44:06,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1078 transitions. [2022-11-02 20:44:06,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:06,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1078 transitions. [2022-11-02 20:44:06,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 539.0) internal successors, (1078), 2 states have internal predecessors, (1078), 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 20:44:06,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 598.0) internal successors, (1794), 3 states have internal predecessors, (1794), 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 20:44:06,207 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 598.0) internal successors, (1794), 3 states have internal predecessors, (1794), 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 20:44:06,207 INFO L175 Difference]: Start difference. First operand has 531 places, 598 transitions, 1516 flow. Second operand 2 states and 1078 transitions. [2022-11-02 20:44:06,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 497 transitions, 1346 flow [2022-11-02 20:44:06,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 497 transitions, 1106 flow, removed 120 selfloop flow, removed 0 redundant places. [2022-11-02 20:44:06,214 INFO L231 Difference]: Finished difference. Result has 531 places, 486 transitions, 1052 flow [2022-11-02 20:44:06,215 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=1074, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1052, PETRI_PLACES=531, PETRI_TRANSITIONS=486} [2022-11-02 20:44:06,215 INFO L287 CegarLoopForPetriNet]: 531 programPoint places, 0 predicate places. [2022-11-02 20:44:06,215 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 486 transitions, 1052 flow [2022-11-02 20:44:06,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 481.5) internal successors, (963), 2 states have internal predecessors, (963), 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 20:44:06,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:06,216 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] [2022-11-02 20:44:06,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-11-02 20:44:06,216 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:06,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:06,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1362209310, now seen corresponding path program 1 times [2022-11-02 20:44:06,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:06,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183343376] [2022-11-02 20:44:06,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:06,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:06,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:06,241 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 20:44:06,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:06,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183343376] [2022-11-02 20:44:06,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183343376] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:44:06,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:44:06,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:44:06,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076603942] [2022-11-02 20:44:06,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:06,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:44:06,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:06,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:44:06,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:44:06,244 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 474 out of 598 [2022-11-02 20:44:06,245 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 486 transitions, 1052 flow. Second operand has 3 states, 3 states have (on average 475.0) internal successors, (1425), 3 states have internal predecessors, (1425), 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 20:44:06,245 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:06,245 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 474 of 598 [2022-11-02 20:44:06,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:06,531 INFO L130 PetriNetUnfolder]: 0/790 cut-off events. [2022-11-02 20:44:06,531 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-11-02 20:44:06,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 957 conditions, 790 events. 0/790 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2596 event pairs, 0 based on Foata normal form. 0/774 useless extension candidates. Maximal degree in co-relation 0. Up to 96 conditions per place. [2022-11-02 20:44:06,532 INFO L137 encePairwiseOnDemand]: 595/598 looper letters, 25 selfloop transitions, 2 changer transitions 0/490 dead transitions. [2022-11-02 20:44:06,532 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 490 transitions, 1114 flow [2022-11-02 20:44:06,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:44:06,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:44:06,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1450 transitions. [2022-11-02 20:44:06,534 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8082497212931996 [2022-11-02 20:44:06,534 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1450 transitions. [2022-11-02 20:44:06,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1450 transitions. [2022-11-02 20:44:06,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:06,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1450 transitions. [2022-11-02 20:44:06,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 483.3333333333333) internal successors, (1450), 3 states have internal predecessors, (1450), 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 20:44:06,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 598.0) internal successors, (2392), 4 states have internal predecessors, (2392), 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 20:44:06,536 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 598.0) internal successors, (2392), 4 states have internal predecessors, (2392), 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 20:44:06,537 INFO L175 Difference]: Start difference. First operand has 531 places, 486 transitions, 1052 flow. Second operand 3 states and 1450 transitions. [2022-11-02 20:44:06,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 490 transitions, 1114 flow [2022-11-02 20:44:06,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 490 transitions, 1114 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:44:06,543 INFO L231 Difference]: Finished difference. Result has 523 places, 487 transitions, 1064 flow [2022-11-02 20:44:06,544 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=1052, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1064, PETRI_PLACES=523, PETRI_TRANSITIONS=487} [2022-11-02 20:44:06,544 INFO L287 CegarLoopForPetriNet]: 531 programPoint places, -8 predicate places. [2022-11-02 20:44:06,545 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 487 transitions, 1064 flow [2022-11-02 20:44:06,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 475.0) internal successors, (1425), 3 states have internal predecessors, (1425), 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 20:44:06,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:06,545 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] [2022-11-02 20:44:06,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-11-02 20:44:06,546 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:06,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:06,546 INFO L85 PathProgramCache]: Analyzing trace with hash -112851242, now seen corresponding path program 1 times [2022-11-02 20:44:06,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:06,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118583939] [2022-11-02 20:44:06,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:06,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:06,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:06,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:06,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:06,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118583939] [2022-11-02 20:44:06,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118583939] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:06,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196710460] [2022-11-02 20:44:06,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:06,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:06,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:06,595 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:06,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-02 20:44:06,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:06,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:44:06,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:06,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:06,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:07,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:07,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196710460] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:44:07,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:44:07,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:44:07,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465009269] [2022-11-02 20:44:07,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:07,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:44:07,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:07,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:44:07,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:44:07,008 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 473 out of 598 [2022-11-02 20:44:07,010 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 487 transitions, 1064 flow. Second operand has 10 states, 10 states have (on average 475.3) internal successors, (4753), 10 states have internal predecessors, (4753), 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 20:44:07,010 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:07,010 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 473 of 598 [2022-11-02 20:44:07,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:07,461 INFO L130 PetriNetUnfolder]: 0/768 cut-off events. [2022-11-02 20:44:07,461 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-02 20:44:07,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 983 conditions, 768 events. 0/768 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2464 event pairs, 0 based on Foata normal form. 2/770 useless extension candidates. Maximal degree in co-relation 0. Up to 59 conditions per place. [2022-11-02 20:44:07,463 INFO L137 encePairwiseOnDemand]: 592/598 looper letters, 26 selfloop transitions, 9 changer transitions 0/497 dead transitions. [2022-11-02 20:44:07,463 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 497 transitions, 1156 flow [2022-11-02 20:44:07,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:44:07,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:44:07,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4294 transitions. [2022-11-02 20:44:07,468 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7978446674098848 [2022-11-02 20:44:07,468 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4294 transitions. [2022-11-02 20:44:07,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4294 transitions. [2022-11-02 20:44:07,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:07,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4294 transitions. [2022-11-02 20:44:07,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 477.1111111111111) internal successors, (4294), 9 states have internal predecessors, (4294), 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 20:44:07,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 598.0) internal successors, (5980), 10 states have internal predecessors, (5980), 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 20:44:07,479 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 598.0) internal successors, (5980), 10 states have internal predecessors, (5980), 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 20:44:07,479 INFO L175 Difference]: Start difference. First operand has 523 places, 487 transitions, 1064 flow. Second operand 9 states and 4294 transitions. [2022-11-02 20:44:07,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 497 transitions, 1156 flow [2022-11-02 20:44:07,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 497 transitions, 1154 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:44:07,487 INFO L231 Difference]: Finished difference. Result has 533 places, 493 transitions, 1112 flow [2022-11-02 20:44:07,488 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=1062, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1112, PETRI_PLACES=533, PETRI_TRANSITIONS=493} [2022-11-02 20:44:07,489 INFO L287 CegarLoopForPetriNet]: 531 programPoint places, 2 predicate places. [2022-11-02 20:44:07,489 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 493 transitions, 1112 flow [2022-11-02 20:44:07,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 475.3) internal successors, (4753), 10 states have internal predecessors, (4753), 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 20:44:07,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:07,490 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:07,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:07,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:07,707 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:07,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:07,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1846186625, now seen corresponding path program 1 times [2022-11-02 20:44:07,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:07,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860169251] [2022-11-02 20:44:07,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:07,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:07,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:07,807 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:07,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:07,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860169251] [2022-11-02 20:44:07,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860169251] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:07,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823293387] [2022-11-02 20:44:07,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:07,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:07,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:07,811 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:07,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-02 20:44:08,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:08,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:44:08,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:08,179 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:08,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:08,269 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:08,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823293387] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:44:08,269 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:44:08,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:44:08,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419177177] [2022-11-02 20:44:08,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:08,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:44:08,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:08,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:44:08,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:44:08,277 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 473 out of 598 [2022-11-02 20:44:08,279 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 493 transitions, 1112 flow. Second operand has 18 states, 18 states have (on average 475.6111111111111) internal successors, (8561), 18 states have internal predecessors, (8561), 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 20:44:08,280 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:08,280 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 473 of 598 [2022-11-02 20:44:08,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:08,757 INFO L130 PetriNetUnfolder]: 0/724 cut-off events. [2022-11-02 20:44:08,757 INFO L131 PetriNetUnfolder]: For 90/90 co-relation queries the response was YES. [2022-11-02 20:44:08,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1048 conditions, 724 events. 0/724 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2164 event pairs, 0 based on Foata normal form. 4/728 useless extension candidates. Maximal degree in co-relation 0. Up to 43 conditions per place. [2022-11-02 20:44:08,759 INFO L137 encePairwiseOnDemand]: 592/598 looper letters, 34 selfloop transitions, 21 changer transitions 0/517 dead transitions. [2022-11-02 20:44:08,759 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 517 transitions, 1330 flow [2022-11-02 20:44:08,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:44:08,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:44:08,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 9992 transitions. [2022-11-02 20:44:08,766 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7956681000159261 [2022-11-02 20:44:08,766 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 9992 transitions. [2022-11-02 20:44:08,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 9992 transitions. [2022-11-02 20:44:08,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:08,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 9992 transitions. [2022-11-02 20:44:08,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 475.8095238095238) internal successors, (9992), 21 states have internal predecessors, (9992), 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 20:44:08,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 598.0) internal successors, (13156), 22 states have internal predecessors, (13156), 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 20:44:08,780 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 598.0) internal successors, (13156), 22 states have internal predecessors, (13156), 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 20:44:08,780 INFO L175 Difference]: Start difference. First operand has 533 places, 493 transitions, 1112 flow. Second operand 21 states and 9992 transitions. [2022-11-02 20:44:08,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 517 transitions, 1330 flow [2022-11-02 20:44:08,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 552 places, 517 transitions, 1316 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:44:08,787 INFO L231 Difference]: Finished difference. Result has 557 places, 506 transitions, 1236 flow [2022-11-02 20:44:08,787 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=1106, PETRI_DIFFERENCE_MINUEND_PLACES=532, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1236, PETRI_PLACES=557, PETRI_TRANSITIONS=506} [2022-11-02 20:44:08,788 INFO L287 CegarLoopForPetriNet]: 531 programPoint places, 26 predicate places. [2022-11-02 20:44:08,788 INFO L495 AbstractCegarLoop]: Abstraction has has 557 places, 506 transitions, 1236 flow [2022-11-02 20:44:08,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 475.6111111111111) internal successors, (8561), 18 states have internal predecessors, (8561), 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 20:44:08,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:08,789 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:08,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-11-02 20:44:08,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:08,990 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:08,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:08,990 INFO L85 PathProgramCache]: Analyzing trace with hash -778990109, now seen corresponding path program 1 times [2022-11-02 20:44:08,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:08,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214963540] [2022-11-02 20:44:08,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:08,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:09,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:09,234 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:09,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:09,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214963540] [2022-11-02 20:44:09,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214963540] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:09,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877853241] [2022-11-02 20:44:09,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:09,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:09,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:09,237 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:09,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-02 20:44:09,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:09,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:44:09,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:09,687 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:09,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:10,060 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:10,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877853241] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:44:10,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:44:10,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-02 20:44:10,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998522496] [2022-11-02 20:44:10,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:10,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:44:10,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:10,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:44:10,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:44:10,076 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 473 out of 598 [2022-11-02 20:44:10,084 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 557 places, 506 transitions, 1236 flow. Second operand has 34 states, 34 states have (on average 475.79411764705884) internal successors, (16177), 34 states have internal predecessors, (16177), 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 20:44:10,084 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:10,084 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 473 of 598 [2022-11-02 20:44:10,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:10,932 INFO L130 PetriNetUnfolder]: 0/636 cut-off events. [2022-11-02 20:44:10,933 INFO L131 PetriNetUnfolder]: For 303/303 co-relation queries the response was YES. [2022-11-02 20:44:10,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1012 conditions, 636 events. 0/636 cut-off events. For 303/303 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1587 event pairs, 0 based on Foata normal form. 8/644 useless extension candidates. Maximal degree in co-relation 0. Up to 29 conditions per place. [2022-11-02 20:44:10,934 INFO L137 encePairwiseOnDemand]: 592/598 looper letters, 50 selfloop transitions, 45 changer transitions 0/557 dead transitions. [2022-11-02 20:44:10,934 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 601 places, 557 transitions, 1742 flow [2022-11-02 20:44:10,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-02 20:44:10,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-02 20:44:10,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 21388 transitions. [2022-11-02 20:44:10,943 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7947974730583426 [2022-11-02 20:44:10,943 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 21388 transitions. [2022-11-02 20:44:10,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 21388 transitions. [2022-11-02 20:44:10,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:10,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 21388 transitions. [2022-11-02 20:44:10,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 475.2888888888889) internal successors, (21388), 45 states have internal predecessors, (21388), 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 20:44:10,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 598.0) internal successors, (27508), 46 states have internal predecessors, (27508), 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 20:44:10,973 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 598.0) internal successors, (27508), 46 states have internal predecessors, (27508), 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 20:44:10,973 INFO L175 Difference]: Start difference. First operand has 557 places, 506 transitions, 1236 flow. Second operand 45 states and 21388 transitions. [2022-11-02 20:44:10,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 601 places, 557 transitions, 1742 flow [2022-11-02 20:44:10,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 595 places, 557 transitions, 1702 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-02 20:44:10,980 INFO L231 Difference]: Finished difference. Result has 604 places, 531 transitions, 1514 flow [2022-11-02 20:44:10,981 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=1212, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1514, PETRI_PLACES=604, PETRI_TRANSITIONS=531} [2022-11-02 20:44:10,981 INFO L287 CegarLoopForPetriNet]: 531 programPoint places, 73 predicate places. [2022-11-02 20:44:10,982 INFO L495 AbstractCegarLoop]: Abstraction has has 604 places, 531 transitions, 1514 flow [2022-11-02 20:44:10,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 475.79411764705884) internal successors, (16177), 34 states have internal predecessors, (16177), 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 20:44:10,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:10,985 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:11,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-11-02 20:44:11,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-11-02 20:44:11,199 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:11,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:11,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1064402135, now seen corresponding path program 1 times [2022-11-02 20:44:11,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:11,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560520165] [2022-11-02 20:44:11,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:11,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:11,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:11,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:11,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:11,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560520165] [2022-11-02 20:44:11,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560520165] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:11,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337630783] [2022-11-02 20:44:11,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:11,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:11,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:11,920 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:11,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-02 20:44:12,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:12,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 20:44:12,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:12,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:12,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:13,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:13,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337630783] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:44:13,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:44:13,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-02 20:44:13,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208528678] [2022-11-02 20:44:13,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:13,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-02 20:44:13,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:13,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-02 20:44:13,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-02 20:44:13,569 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 473 out of 598 [2022-11-02 20:44:13,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 604 places, 531 transitions, 1514 flow. Second operand has 66 states, 66 states have (on average 475.8939393939394) internal successors, (31409), 66 states have internal predecessors, (31409), 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 20:44:13,579 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:13,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 473 of 598 [2022-11-02 20:44:13,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:14,591 INFO L130 PetriNetUnfolder]: 0/614 cut-off events. [2022-11-02 20:44:14,591 INFO L131 PetriNetUnfolder]: For 409/409 co-relation queries the response was YES. [2022-11-02 20:44:14,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1033 conditions, 614 events. 0/614 cut-off events. For 409/409 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1463 event pairs, 0 based on Foata normal form. 2/616 useless extension candidates. Maximal degree in co-relation 0. Up to 28 conditions per place. [2022-11-02 20:44:14,592 INFO L137 encePairwiseOnDemand]: 593/598 looper letters, 51 selfloop transitions, 49 changer transitions 0/552 dead transitions. [2022-11-02 20:44:14,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 643 places, 552 transitions, 1852 flow [2022-11-02 20:44:14,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-02 20:44:14,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-11-02 20:44:14,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 24225 transitions. [2022-11-02 20:44:14,604 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.794314381270903 [2022-11-02 20:44:14,605 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 24225 transitions. [2022-11-02 20:44:14,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 24225 transitions. [2022-11-02 20:44:14,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:14,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 24225 transitions. [2022-11-02 20:44:14,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 475.0) internal successors, (24225), 51 states have internal predecessors, (24225), 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 20:44:14,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 598.0) internal successors, (31096), 52 states have internal predecessors, (31096), 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 20:44:14,638 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 598.0) internal successors, (31096), 52 states have internal predecessors, (31096), 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 20:44:14,638 INFO L175 Difference]: Start difference. First operand has 604 places, 531 transitions, 1514 flow. Second operand 51 states and 24225 transitions. [2022-11-02 20:44:14,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 643 places, 552 transitions, 1852 flow [2022-11-02 20:44:14,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 610 places, 552 transitions, 1715 flow, removed 11 selfloop flow, removed 33 redundant places. [2022-11-02 20:44:14,651 INFO L231 Difference]: Finished difference. Result has 610 places, 523 transitions, 1471 flow [2022-11-02 20:44:14,652 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=560, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=1471, PETRI_PLACES=610, PETRI_TRANSITIONS=523} [2022-11-02 20:44:14,652 INFO L287 CegarLoopForPetriNet]: 531 programPoint places, 79 predicate places. [2022-11-02 20:44:14,652 INFO L495 AbstractCegarLoop]: Abstraction has has 610 places, 523 transitions, 1471 flow [2022-11-02 20:44:14,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 475.8939393939394) internal successors, (31409), 66 states have internal predecessors, (31409), 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 20:44:14,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:14,657 INFO L208 CegarLoopForPetriNet]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:44:14,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-11-02 20:44:14,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:14,883 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:14,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:14,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1486777266, now seen corresponding path program 1 times [2022-11-02 20:44:14,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:14,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439477216] [2022-11-02 20:44:14,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:14,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:14,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:44:14,914 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:44:14,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:44:14,964 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:44:14,964 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:44:14,964 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:44:14,964 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:44:14,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-11-02 20:44:14,965 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:14,965 WARN L233 ceAbstractionStarter]: 16 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:44:14,965 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 17 thread instances. [2022-11-02 20:44:15,016 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:44:15,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 560 places, 631 transitions, 1619 flow [2022-11-02 20:44:15,529 INFO L130 PetriNetUnfolder]: 174/1238 cut-off events. [2022-11-02 20:44:15,529 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2022-11-02 20:44:15,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1443 conditions, 1238 events. 174/1238 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 4476 event pairs, 0 based on Foata normal form. 0/1028 useless extension candidates. Maximal degree in co-relation 1326. Up to 36 conditions per place. [2022-11-02 20:44:15,592 INFO L82 GeneralOperation]: Start removeDead. Operand has 560 places, 631 transitions, 1619 flow [2022-11-02 20:44:15,610 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 560 places, 631 transitions, 1619 flow [2022-11-02 20:44:15,611 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:44:15,611 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;@4e0ca16a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:44:15,611 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:44:15,617 INFO L130 PetriNetUnfolder]: 5/81 cut-off events. [2022-11-02 20:44:15,617 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:44:15,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:15,618 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] [2022-11-02 20:44:15,618 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:15,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:15,618 INFO L85 PathProgramCache]: Analyzing trace with hash 453894753, now seen corresponding path program 1 times [2022-11-02 20:44:15,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:15,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549940863] [2022-11-02 20:44:15,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:15,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:15,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:15,634 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 20:44:15,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:15,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549940863] [2022-11-02 20:44:15,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549940863] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:44:15,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:44:15,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:44:15,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512591110] [2022-11-02 20:44:15,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:15,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:44:15,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:15,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:44:15,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:44:15,637 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 507 out of 631 [2022-11-02 20:44:15,638 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 631 transitions, 1619 flow. Second operand has 2 states, 2 states have (on average 507.5) internal successors, (1015), 2 states have internal predecessors, (1015), 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 20:44:15,638 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:15,638 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 507 of 631 [2022-11-02 20:44:15,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:16,032 INFO L130 PetriNetUnfolder]: 0/1046 cut-off events. [2022-11-02 20:44:16,032 INFO L131 PetriNetUnfolder]: For 1105/1105 co-relation queries the response was YES. [2022-11-02 20:44:16,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1269 conditions, 1046 events. 0/1046 cut-off events. For 1105/1105 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4129 event pairs, 0 based on Foata normal form. 896/1906 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2022-11-02 20:44:16,034 INFO L137 encePairwiseOnDemand]: 525/631 looper letters, 17 selfloop transitions, 0 changer transitions 11/524 dead transitions. [2022-11-02 20:44:16,034 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 524 transitions, 1439 flow [2022-11-02 20:44:16,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:44:16,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:44:16,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1137 transitions. [2022-11-02 20:44:16,036 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9009508716323297 [2022-11-02 20:44:16,036 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1137 transitions. [2022-11-02 20:44:16,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1137 transitions. [2022-11-02 20:44:16,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:16,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1137 transitions. [2022-11-02 20:44:16,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 568.5) internal successors, (1137), 2 states have internal predecessors, (1137), 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 20:44:16,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 631.0) internal successors, (1893), 3 states have internal predecessors, (1893), 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 20:44:16,038 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 631.0) internal successors, (1893), 3 states have internal predecessors, (1893), 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 20:44:16,038 INFO L175 Difference]: Start difference. First operand has 560 places, 631 transitions, 1619 flow. Second operand 2 states and 1137 transitions. [2022-11-02 20:44:16,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 560 places, 524 transitions, 1439 flow [2022-11-02 20:44:16,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 560 places, 524 transitions, 1167 flow, removed 136 selfloop flow, removed 0 redundant places. [2022-11-02 20:44:16,048 INFO L231 Difference]: Finished difference. Result has 560 places, 513 transitions, 1111 flow [2022-11-02 20:44:16,049 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=1133, PETRI_DIFFERENCE_MINUEND_PLACES=559, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1111, PETRI_PLACES=560, PETRI_TRANSITIONS=513} [2022-11-02 20:44:16,049 INFO L287 CegarLoopForPetriNet]: 560 programPoint places, 0 predicate places. [2022-11-02 20:44:16,049 INFO L495 AbstractCegarLoop]: Abstraction has has 560 places, 513 transitions, 1111 flow [2022-11-02 20:44:16,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 507.5) internal successors, (1015), 2 states have internal predecessors, (1015), 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 20:44:16,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:16,050 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] [2022-11-02 20:44:16,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-11-02 20:44:16,050 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:16,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:16,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1343056606, now seen corresponding path program 1 times [2022-11-02 20:44:16,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:16,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826324137] [2022-11-02 20:44:16,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:16,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:16,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:16,071 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 20:44:16,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:16,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826324137] [2022-11-02 20:44:16,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826324137] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:44:16,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:44:16,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:44:16,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914939952] [2022-11-02 20:44:16,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:16,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:44:16,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:16,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:44:16,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:44:16,075 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 500 out of 631 [2022-11-02 20:44:16,076 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 513 transitions, 1111 flow. Second operand has 3 states, 3 states have (on average 501.0) internal successors, (1503), 3 states have internal predecessors, (1503), 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 20:44:16,076 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:16,076 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 500 of 631 [2022-11-02 20:44:16,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:16,390 INFO L130 PetriNetUnfolder]: 0/837 cut-off events. [2022-11-02 20:44:16,390 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-02 20:44:16,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1014 conditions, 837 events. 0/837 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2765 event pairs, 0 based on Foata normal form. 0/820 useless extension candidates. Maximal degree in co-relation 0. Up to 102 conditions per place. [2022-11-02 20:44:16,392 INFO L137 encePairwiseOnDemand]: 628/631 looper letters, 26 selfloop transitions, 2 changer transitions 0/517 dead transitions. [2022-11-02 20:44:16,392 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 551 places, 517 transitions, 1175 flow [2022-11-02 20:44:16,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:44:16,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:44:16,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1529 transitions. [2022-11-02 20:44:16,394 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8077126254622292 [2022-11-02 20:44:16,394 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1529 transitions. [2022-11-02 20:44:16,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1529 transitions. [2022-11-02 20:44:16,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:16,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1529 transitions. [2022-11-02 20:44:16,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 509.6666666666667) internal successors, (1529), 3 states have internal predecessors, (1529), 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 20:44:16,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 631.0) internal successors, (2524), 4 states have internal predecessors, (2524), 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 20:44:16,398 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 631.0) internal successors, (2524), 4 states have internal predecessors, (2524), 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 20:44:16,398 INFO L175 Difference]: Start difference. First operand has 560 places, 513 transitions, 1111 flow. Second operand 3 states and 1529 transitions. [2022-11-02 20:44:16,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 551 places, 517 transitions, 1175 flow [2022-11-02 20:44:16,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 551 places, 517 transitions, 1175 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:44:16,404 INFO L231 Difference]: Finished difference. Result has 552 places, 514 transitions, 1123 flow [2022-11-02 20:44:16,404 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=1111, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1123, PETRI_PLACES=552, PETRI_TRANSITIONS=514} [2022-11-02 20:44:16,405 INFO L287 CegarLoopForPetriNet]: 560 programPoint places, -8 predicate places. [2022-11-02 20:44:16,405 INFO L495 AbstractCegarLoop]: Abstraction has has 552 places, 514 transitions, 1123 flow [2022-11-02 20:44:16,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 501.0) internal successors, (1503), 3 states have internal predecessors, (1503), 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 20:44:16,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:16,406 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] [2022-11-02 20:44:16,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-11-02 20:44:16,406 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:16,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:16,407 INFO L85 PathProgramCache]: Analyzing trace with hash -777301866, now seen corresponding path program 1 times [2022-11-02 20:44:16,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:16,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622343533] [2022-11-02 20:44:16,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:16,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:16,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:16,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:16,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:16,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622343533] [2022-11-02 20:44:16,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622343533] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:16,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288264418] [2022-11-02 20:44:16,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:16,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:16,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:16,448 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:16,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-02 20:44:16,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:16,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:44:16,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:16,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:16,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:16,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:16,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288264418] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:44:16,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:44:16,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:44:16,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532459811] [2022-11-02 20:44:16,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:16,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:44:16,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:16,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:44:16,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:44:16,881 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 499 out of 631 [2022-11-02 20:44:16,885 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 514 transitions, 1123 flow. Second operand has 10 states, 10 states have (on average 501.3) internal successors, (5013), 10 states have internal predecessors, (5013), 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 20:44:16,885 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:16,885 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 499 of 631 [2022-11-02 20:44:16,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:17,393 INFO L130 PetriNetUnfolder]: 0/815 cut-off events. [2022-11-02 20:44:17,394 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-02 20:44:17,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1043 conditions, 815 events. 0/815 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2635 event pairs, 0 based on Foata normal form. 2/817 useless extension candidates. Maximal degree in co-relation 0. Up to 63 conditions per place. [2022-11-02 20:44:17,396 INFO L137 encePairwiseOnDemand]: 625/631 looper letters, 27 selfloop transitions, 9 changer transitions 0/524 dead transitions. [2022-11-02 20:44:17,396 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 524 transitions, 1217 flow [2022-11-02 20:44:17,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:44:17,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:44:17,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4529 transitions. [2022-11-02 20:44:17,399 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7974995597816517 [2022-11-02 20:44:17,399 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4529 transitions. [2022-11-02 20:44:17,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4529 transitions. [2022-11-02 20:44:17,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:17,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4529 transitions. [2022-11-02 20:44:17,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 503.22222222222223) internal successors, (4529), 9 states have internal predecessors, (4529), 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 20:44:17,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 631.0) internal successors, (6310), 10 states have internal predecessors, (6310), 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 20:44:17,405 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 631.0) internal successors, (6310), 10 states have internal predecessors, (6310), 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 20:44:17,405 INFO L175 Difference]: Start difference. First operand has 552 places, 514 transitions, 1123 flow. Second operand 9 states and 4529 transitions. [2022-11-02 20:44:17,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 560 places, 524 transitions, 1217 flow [2022-11-02 20:44:17,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 559 places, 524 transitions, 1215 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:44:17,411 INFO L231 Difference]: Finished difference. Result has 562 places, 520 transitions, 1171 flow [2022-11-02 20:44:17,412 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=1121, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1171, PETRI_PLACES=562, PETRI_TRANSITIONS=520} [2022-11-02 20:44:17,412 INFO L287 CegarLoopForPetriNet]: 560 programPoint places, 2 predicate places. [2022-11-02 20:44:17,412 INFO L495 AbstractCegarLoop]: Abstraction has has 562 places, 520 transitions, 1171 flow [2022-11-02 20:44:17,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 501.3) internal successors, (5013), 10 states have internal predecessors, (5013), 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 20:44:17,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:17,413 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:17,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:17,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable80 [2022-11-02 20:44:17,614 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:17,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:17,614 INFO L85 PathProgramCache]: Analyzing trace with hash 345542977, now seen corresponding path program 1 times [2022-11-02 20:44:17,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:17,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161450475] [2022-11-02 20:44:17,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:17,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:17,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:17,702 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:17,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:17,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161450475] [2022-11-02 20:44:17,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161450475] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:17,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115894739] [2022-11-02 20:44:17,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:17,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:17,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:17,703 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:17,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-02 20:44:18,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:18,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:44:18,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:18,089 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:18,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:18,182 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:18,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115894739] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:44:18,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:44:18,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:44:18,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007457777] [2022-11-02 20:44:18,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:18,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:44:18,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:18,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:44:18,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:44:18,193 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 499 out of 631 [2022-11-02 20:44:18,197 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 562 places, 520 transitions, 1171 flow. Second operand has 18 states, 18 states have (on average 501.6111111111111) internal successors, (9029), 18 states have internal predecessors, (9029), 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 20:44:18,197 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:18,197 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 499 of 631 [2022-11-02 20:44:18,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:18,729 INFO L130 PetriNetUnfolder]: 0/771 cut-off events. [2022-11-02 20:44:18,729 INFO L131 PetriNetUnfolder]: For 96/96 co-relation queries the response was YES. [2022-11-02 20:44:18,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1116 conditions, 771 events. 0/771 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2334 event pairs, 0 based on Foata normal form. 4/775 useless extension candidates. Maximal degree in co-relation 0. Up to 47 conditions per place. [2022-11-02 20:44:18,731 INFO L137 encePairwiseOnDemand]: 625/631 looper letters, 35 selfloop transitions, 21 changer transitions 0/544 dead transitions. [2022-11-02 20:44:18,731 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 582 places, 544 transitions, 1391 flow [2022-11-02 20:44:18,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:44:18,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:44:18,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 10539 transitions. [2022-11-02 20:44:18,737 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7953362010414309 [2022-11-02 20:44:18,737 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 10539 transitions. [2022-11-02 20:44:18,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 10539 transitions. [2022-11-02 20:44:18,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:18,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 10539 transitions. [2022-11-02 20:44:18,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 501.85714285714283) internal successors, (10539), 21 states have internal predecessors, (10539), 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 20:44:18,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 631.0) internal successors, (13882), 22 states have internal predecessors, (13882), 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 20:44:18,752 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 631.0) internal successors, (13882), 22 states have internal predecessors, (13882), 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 20:44:18,752 INFO L175 Difference]: Start difference. First operand has 562 places, 520 transitions, 1171 flow. Second operand 21 states and 10539 transitions. [2022-11-02 20:44:18,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 582 places, 544 transitions, 1391 flow [2022-11-02 20:44:18,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 581 places, 544 transitions, 1377 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:44:18,759 INFO L231 Difference]: Finished difference. Result has 586 places, 533 transitions, 1295 flow [2022-11-02 20:44:18,760 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=1165, PETRI_DIFFERENCE_MINUEND_PLACES=561, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1295, PETRI_PLACES=586, PETRI_TRANSITIONS=533} [2022-11-02 20:44:18,760 INFO L287 CegarLoopForPetriNet]: 560 programPoint places, 26 predicate places. [2022-11-02 20:44:18,760 INFO L495 AbstractCegarLoop]: Abstraction has has 586 places, 533 transitions, 1295 flow [2022-11-02 20:44:18,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 501.6111111111111) internal successors, (9029), 18 states have internal predecessors, (9029), 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 20:44:18,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:18,762 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:18,792 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-11-02 20:44:18,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:18,962 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:18,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:18,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1939114333, now seen corresponding path program 1 times [2022-11-02 20:44:18,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:18,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344597668] [2022-11-02 20:44:18,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:18,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:18,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:19,193 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:19,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:19,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344597668] [2022-11-02 20:44:19,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344597668] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:19,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612149536] [2022-11-02 20:44:19,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:19,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:19,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:19,195 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:19,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-02 20:44:19,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:19,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:44:19,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:19,677 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:19,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:19,985 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:19,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612149536] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:44:19,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:44:19,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-02 20:44:19,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596311451] [2022-11-02 20:44:19,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:19,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:44:19,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:19,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:44:19,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:44:19,996 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 499 out of 631 [2022-11-02 20:44:20,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 586 places, 533 transitions, 1295 flow. Second operand has 34 states, 34 states have (on average 501.79411764705884) internal successors, (17061), 34 states have internal predecessors, (17061), 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 20:44:20,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:20,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 499 of 631 [2022-11-02 20:44:20,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:20,941 INFO L130 PetriNetUnfolder]: 0/683 cut-off events. [2022-11-02 20:44:20,941 INFO L131 PetriNetUnfolder]: For 330/330 co-relation queries the response was YES. [2022-11-02 20:44:20,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1089 conditions, 683 events. 0/683 cut-off events. For 330/330 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1758 event pairs, 0 based on Foata normal form. 8/691 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2022-11-02 20:44:20,943 INFO L137 encePairwiseOnDemand]: 625/631 looper letters, 51 selfloop transitions, 45 changer transitions 0/584 dead transitions. [2022-11-02 20:44:20,944 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 630 places, 584 transitions, 1803 flow [2022-11-02 20:44:20,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-02 20:44:20,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-02 20:44:20,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 22559 transitions. [2022-11-02 20:44:20,955 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7944708575453425 [2022-11-02 20:44:20,955 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 22559 transitions. [2022-11-02 20:44:20,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 22559 transitions. [2022-11-02 20:44:20,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:20,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 22559 transitions. [2022-11-02 20:44:20,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 501.31111111111113) internal successors, (22559), 45 states have internal predecessors, (22559), 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 20:44:20,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 631.0) internal successors, (29026), 46 states have internal predecessors, (29026), 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 20:44:20,991 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 631.0) internal successors, (29026), 46 states have internal predecessors, (29026), 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 20:44:20,991 INFO L175 Difference]: Start difference. First operand has 586 places, 533 transitions, 1295 flow. Second operand 45 states and 22559 transitions. [2022-11-02 20:44:20,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 630 places, 584 transitions, 1803 flow [2022-11-02 20:44:20,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 624 places, 584 transitions, 1763 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-02 20:44:21,003 INFO L231 Difference]: Finished difference. Result has 633 places, 558 transitions, 1573 flow [2022-11-02 20:44:21,003 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=1271, PETRI_DIFFERENCE_MINUEND_PLACES=580, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1573, PETRI_PLACES=633, PETRI_TRANSITIONS=558} [2022-11-02 20:44:21,003 INFO L287 CegarLoopForPetriNet]: 560 programPoint places, 73 predicate places. [2022-11-02 20:44:21,003 INFO L495 AbstractCegarLoop]: Abstraction has has 633 places, 558 transitions, 1573 flow [2022-11-02 20:44:21,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 501.79411764705884) internal successors, (17061), 34 states have internal predecessors, (17061), 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 20:44:21,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:21,005 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:21,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:21,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:21,206 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:21,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:21,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1036859799, now seen corresponding path program 1 times [2022-11-02 20:44:21,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:21,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628935599] [2022-11-02 20:44:21,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:21,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:21,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:21,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:21,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:21,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628935599] [2022-11-02 20:44:21,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628935599] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:21,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034872297] [2022-11-02 20:44:21,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:21,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:21,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:21,968 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:21,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-02 20:44:22,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:22,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 20:44:22,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:22,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:22,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:23,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:23,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034872297] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:44:23,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:44:23,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-02 20:44:23,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729994494] [2022-11-02 20:44:23,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:23,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-02 20:44:23,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:23,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-02 20:44:23,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-02 20:44:23,642 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 499 out of 631 [2022-11-02 20:44:23,659 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 633 places, 558 transitions, 1573 flow. Second operand has 66 states, 66 states have (on average 501.8939393939394) internal successors, (33125), 66 states have internal predecessors, (33125), 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 20:44:23,659 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:23,659 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 499 of 631 [2022-11-02 20:44:23,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:24,836 INFO L130 PetriNetUnfolder]: 0/650 cut-off events. [2022-11-02 20:44:24,836 INFO L131 PetriNetUnfolder]: For 530/530 co-relation queries the response was YES. [2022-11-02 20:44:24,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1096 conditions, 650 events. 0/650 cut-off events. For 530/530 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1561 event pairs, 0 based on Foata normal form. 3/653 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2022-11-02 20:44:24,838 INFO L137 encePairwiseOnDemand]: 626/631 looper letters, 54 selfloop transitions, 52 changer transitions 0/584 dead transitions. [2022-11-02 20:44:24,838 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 675 places, 584 transitions, 1967 flow [2022-11-02 20:44:24,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-02 20:44:24,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-11-02 20:44:24,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 27055 transitions. [2022-11-02 20:44:24,852 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7940071608851323 [2022-11-02 20:44:24,852 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 27055 transitions. [2022-11-02 20:44:24,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 27055 transitions. [2022-11-02 20:44:24,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:24,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 27055 transitions. [2022-11-02 20:44:24,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 501.01851851851853) internal successors, (27055), 54 states have internal predecessors, (27055), 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 20:44:24,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 631.0) internal successors, (34705), 55 states have internal predecessors, (34705), 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 20:44:24,890 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 631.0) internal successors, (34705), 55 states have internal predecessors, (34705), 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 20:44:24,890 INFO L175 Difference]: Start difference. First operand has 633 places, 558 transitions, 1573 flow. Second operand 54 states and 27055 transitions. [2022-11-02 20:44:24,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 675 places, 584 transitions, 1967 flow [2022-11-02 20:44:24,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 642 places, 584 transitions, 1822 flow, removed 12 selfloop flow, removed 33 redundant places. [2022-11-02 20:44:24,900 INFO L231 Difference]: Finished difference. Result has 642 places, 553 transitions, 1559 flow [2022-11-02 20:44:24,900 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=1409, PETRI_DIFFERENCE_MINUEND_PLACES=589, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=1559, PETRI_PLACES=642, PETRI_TRANSITIONS=553} [2022-11-02 20:44:24,900 INFO L287 CegarLoopForPetriNet]: 560 programPoint places, 82 predicate places. [2022-11-02 20:44:24,900 INFO L495 AbstractCegarLoop]: Abstraction has has 642 places, 553 transitions, 1559 flow [2022-11-02 20:44:24,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 501.8939393939394) internal successors, (33125), 66 states have internal predecessors, (33125), 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 20:44:24,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:24,903 INFO L208 CegarLoopForPetriNet]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:44:24,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-11-02 20:44:25,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-11-02 20:44:25,104 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:25,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:25,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1484304650, now seen corresponding path program 1 times [2022-11-02 20:44:25,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:25,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185451195] [2022-11-02 20:44:25,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:25,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:25,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:44:25,132 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:44:25,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:44:25,187 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:44:25,187 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:44:25,187 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:44:25,187 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:44:25,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-11-02 20:44:25,188 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:25,188 WARN L233 ceAbstractionStarter]: 17 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:44:25,188 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 18 thread instances. [2022-11-02 20:44:25,241 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:44:25,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 589 places, 664 transitions, 1724 flow [2022-11-02 20:44:25,784 INFO L130 PetriNetUnfolder]: 184/1307 cut-off events. [2022-11-02 20:44:25,784 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2022-11-02 20:44:25,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1533 conditions, 1307 events. 184/1307 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 4761 event pairs, 0 based on Foata normal form. 0/1085 useless extension candidates. Maximal degree in co-relation 1415. Up to 38 conditions per place. [2022-11-02 20:44:25,853 INFO L82 GeneralOperation]: Start removeDead. Operand has 589 places, 664 transitions, 1724 flow [2022-11-02 20:44:25,871 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 589 places, 664 transitions, 1724 flow [2022-11-02 20:44:25,872 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:44:25,872 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;@4e0ca16a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:44:25,872 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:44:25,876 INFO L130 PetriNetUnfolder]: 3/76 cut-off events. [2022-11-02 20:44:25,876 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:44:25,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:25,876 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] [2022-11-02 20:44:25,876 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:25,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:25,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1100248866, now seen corresponding path program 1 times [2022-11-02 20:44:25,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:25,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468325008] [2022-11-02 20:44:25,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:25,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:25,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:25,895 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 20:44:25,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:25,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468325008] [2022-11-02 20:44:25,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468325008] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:44:25,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:44:25,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:44:25,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482328360] [2022-11-02 20:44:25,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:25,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:44:25,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:25,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:44:25,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:44:25,899 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 526 out of 664 [2022-11-02 20:44:25,900 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 589 places, 664 transitions, 1724 flow. Second operand has 3 states, 3 states have (on average 527.0) internal successors, (1581), 3 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 20:44:25,900 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:25,901 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 526 of 664 [2022-11-02 20:44:25,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:26,360 INFO L130 PetriNetUnfolder]: 0/1082 cut-off events. [2022-11-02 20:44:26,360 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2022-11-02 20:44:26,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1421 conditions, 1082 events. 0/1082 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4318 event pairs, 0 based on Foata normal form. 5515/6561 useless extension candidates. Maximal degree in co-relation 0. Up to 108 conditions per place. [2022-11-02 20:44:26,362 INFO L137 encePairwiseOnDemand]: 549/664 looper letters, 27 selfloop transitions, 2 changer transitions 11/555 dead transitions. [2022-11-02 20:44:26,362 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 555 transitions, 1564 flow [2022-11-02 20:44:26,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:44:26,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:44:26,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1727 transitions. [2022-11-02 20:44:26,364 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8669678714859438 [2022-11-02 20:44:26,364 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1727 transitions. [2022-11-02 20:44:26,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1727 transitions. [2022-11-02 20:44:26,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:26,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1727 transitions. [2022-11-02 20:44:26,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 575.6666666666666) internal successors, (1727), 3 states have internal predecessors, (1727), 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 20:44:26,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 664.0) internal successors, (2656), 4 states have internal predecessors, (2656), 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 20:44:26,366 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 664.0) internal successors, (2656), 4 states have internal predecessors, (2656), 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 20:44:26,366 INFO L175 Difference]: Start difference. First operand has 589 places, 664 transitions, 1724 flow. Second operand 3 states and 1727 transitions. [2022-11-02 20:44:26,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 555 transitions, 1564 flow [2022-11-02 20:44:26,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 590 places, 555 transitions, 1258 flow, removed 153 selfloop flow, removed 0 redundant places. [2022-11-02 20:44:26,374 INFO L231 Difference]: Finished difference. Result has 591 places, 541 transitions, 1182 flow [2022-11-02 20:44:26,374 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=664, PETRI_DIFFERENCE_MINUEND_FLOW=1192, PETRI_DIFFERENCE_MINUEND_PLACES=588, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1182, PETRI_PLACES=591, PETRI_TRANSITIONS=541} [2022-11-02 20:44:26,375 INFO L287 CegarLoopForPetriNet]: 589 programPoint places, 2 predicate places. [2022-11-02 20:44:26,375 INFO L495 AbstractCegarLoop]: Abstraction has has 591 places, 541 transitions, 1182 flow [2022-11-02 20:44:26,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 527.0) internal successors, (1581), 3 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 20:44:26,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:26,376 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] [2022-11-02 20:44:26,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-11-02 20:44:26,376 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:26,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:26,377 INFO L85 PathProgramCache]: Analyzing trace with hash -249523786, now seen corresponding path program 1 times [2022-11-02 20:44:26,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:26,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086568539] [2022-11-02 20:44:26,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:26,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:26,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:26,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:26,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:26,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086568539] [2022-11-02 20:44:26,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086568539] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:26,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776287376] [2022-11-02 20:44:26,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:26,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:26,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:26,414 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:26,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-02 20:44:26,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:26,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:44:26,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:26,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:26,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:26,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:26,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776287376] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:44:26,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:44:26,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:44:26,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750280024] [2022-11-02 20:44:26,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:26,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:44:26,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:26,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:44:26,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:44:26,840 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 525 out of 664 [2022-11-02 20:44:26,842 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 591 places, 541 transitions, 1182 flow. Second operand has 10 states, 10 states have (on average 527.3) internal successors, (5273), 10 states have internal predecessors, (5273), 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 20:44:26,842 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:26,842 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 525 of 664 [2022-11-02 20:44:26,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:27,284 INFO L130 PetriNetUnfolder]: 0/862 cut-off events. [2022-11-02 20:44:27,284 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-11-02 20:44:27,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1102 conditions, 862 events. 0/862 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2806 event pairs, 0 based on Foata normal form. 2/864 useless extension candidates. Maximal degree in co-relation 0. Up to 67 conditions per place. [2022-11-02 20:44:27,286 INFO L137 encePairwiseOnDemand]: 658/664 looper letters, 28 selfloop transitions, 9 changer transitions 0/551 dead transitions. [2022-11-02 20:44:27,286 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 588 places, 551 transitions, 1278 flow [2022-11-02 20:44:27,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:44:27,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:44:27,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4764 transitions. [2022-11-02 20:44:27,290 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7971887550200804 [2022-11-02 20:44:27,290 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4764 transitions. [2022-11-02 20:44:27,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4764 transitions. [2022-11-02 20:44:27,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:27,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4764 transitions. [2022-11-02 20:44:27,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 529.3333333333334) internal successors, (4764), 9 states have internal predecessors, (4764), 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 20:44:27,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 664.0) internal successors, (6640), 10 states have internal predecessors, (6640), 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 20:44:27,297 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 664.0) internal successors, (6640), 10 states have internal predecessors, (6640), 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 20:44:27,298 INFO L175 Difference]: Start difference. First operand has 591 places, 541 transitions, 1182 flow. Second operand 9 states and 4764 transitions. [2022-11-02 20:44:27,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 588 places, 551 transitions, 1278 flow [2022-11-02 20:44:27,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 587 places, 551 transitions, 1276 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:44:27,308 INFO L231 Difference]: Finished difference. Result has 590 places, 547 transitions, 1230 flow [2022-11-02 20:44:27,309 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=664, PETRI_DIFFERENCE_MINUEND_FLOW=1180, PETRI_DIFFERENCE_MINUEND_PLACES=579, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1230, PETRI_PLACES=590, PETRI_TRANSITIONS=547} [2022-11-02 20:44:27,310 INFO L287 CegarLoopForPetriNet]: 589 programPoint places, 1 predicate places. [2022-11-02 20:44:27,310 INFO L495 AbstractCegarLoop]: Abstraction has has 590 places, 547 transitions, 1230 flow [2022-11-02 20:44:27,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 527.3) internal successors, (5273), 10 states have internal predecessors, (5273), 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 20:44:27,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:27,312 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:27,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:27,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:27,539 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:27,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:27,539 INFO L85 PathProgramCache]: Analyzing trace with hash 228153505, now seen corresponding path program 1 times [2022-11-02 20:44:27,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:27,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880152100] [2022-11-02 20:44:27,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:27,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:27,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:27,622 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:27,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:27,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880152100] [2022-11-02 20:44:27,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880152100] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:27,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774508653] [2022-11-02 20:44:27,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:27,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:27,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:27,624 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:27,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-02 20:44:28,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:28,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:44:28,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:28,160 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:28,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:28,267 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:28,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774508653] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:44:28,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:44:28,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:44:28,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400973454] [2022-11-02 20:44:28,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:28,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:44:28,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:28,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:44:28,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:44:28,275 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 525 out of 664 [2022-11-02 20:44:28,280 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 590 places, 547 transitions, 1230 flow. Second operand has 18 states, 18 states have (on average 527.6111111111111) internal successors, (9497), 18 states have internal predecessors, (9497), 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 20:44:28,280 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:28,280 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 525 of 664 [2022-11-02 20:44:28,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:28,829 INFO L130 PetriNetUnfolder]: 0/818 cut-off events. [2022-11-02 20:44:28,829 INFO L131 PetriNetUnfolder]: For 102/102 co-relation queries the response was YES. [2022-11-02 20:44:28,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1183 conditions, 818 events. 0/818 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2513 event pairs, 0 based on Foata normal form. 4/822 useless extension candidates. Maximal degree in co-relation 0. Up to 51 conditions per place. [2022-11-02 20:44:28,830 INFO L137 encePairwiseOnDemand]: 658/664 looper letters, 36 selfloop transitions, 21 changer transitions 0/571 dead transitions. [2022-11-02 20:44:28,830 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 610 places, 571 transitions, 1452 flow [2022-11-02 20:44:28,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:44:28,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:44:28,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 11086 transitions. [2022-11-02 20:44:28,837 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7950372920252439 [2022-11-02 20:44:28,837 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 11086 transitions. [2022-11-02 20:44:28,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 11086 transitions. [2022-11-02 20:44:28,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:28,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 11086 transitions. [2022-11-02 20:44:28,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 527.9047619047619) internal successors, (11086), 21 states have internal predecessors, (11086), 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 20:44:28,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 664.0) internal successors, (14608), 22 states have internal predecessors, (14608), 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 20:44:28,853 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 664.0) internal successors, (14608), 22 states have internal predecessors, (14608), 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 20:44:28,853 INFO L175 Difference]: Start difference. First operand has 590 places, 547 transitions, 1230 flow. Second operand 21 states and 11086 transitions. [2022-11-02 20:44:28,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 610 places, 571 transitions, 1452 flow [2022-11-02 20:44:28,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 609 places, 571 transitions, 1438 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:44:28,859 INFO L231 Difference]: Finished difference. Result has 614 places, 560 transitions, 1354 flow [2022-11-02 20:44:28,860 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=664, PETRI_DIFFERENCE_MINUEND_FLOW=1224, PETRI_DIFFERENCE_MINUEND_PLACES=589, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1354, PETRI_PLACES=614, PETRI_TRANSITIONS=560} [2022-11-02 20:44:28,860 INFO L287 CegarLoopForPetriNet]: 589 programPoint places, 25 predicate places. [2022-11-02 20:44:28,860 INFO L495 AbstractCegarLoop]: Abstraction has has 614 places, 560 transitions, 1354 flow [2022-11-02 20:44:28,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 527.6111111111111) internal successors, (9497), 18 states have internal predecessors, (9497), 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 20:44:28,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:28,862 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:28,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-11-02 20:44:29,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:29,063 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:29,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:29,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1823577469, now seen corresponding path program 1 times [2022-11-02 20:44:29,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:29,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558940999] [2022-11-02 20:44:29,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:29,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:29,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:29,308 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:29,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:29,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558940999] [2022-11-02 20:44:29,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558940999] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:29,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126139278] [2022-11-02 20:44:29,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:29,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:29,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:29,315 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:29,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-02 20:44:29,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:29,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:44:29,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:29,820 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:29,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:30,130 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:30,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126139278] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:44:30,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:44:30,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-02 20:44:30,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450296504] [2022-11-02 20:44:30,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:30,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:44:30,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:30,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:44:30,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:44:30,141 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 525 out of 664 [2022-11-02 20:44:30,147 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 614 places, 560 transitions, 1354 flow. Second operand has 34 states, 34 states have (on average 527.7941176470588) internal successors, (17945), 34 states have internal predecessors, (17945), 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 20:44:30,147 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:30,147 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 525 of 664 [2022-11-02 20:44:30,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:31,181 INFO L130 PetriNetUnfolder]: 0/730 cut-off events. [2022-11-02 20:44:31,181 INFO L131 PetriNetUnfolder]: For 357/357 co-relation queries the response was YES. [2022-11-02 20:44:31,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1165 conditions, 730 events. 0/730 cut-off events. For 357/357 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1932 event pairs, 0 based on Foata normal form. 8/738 useless extension candidates. Maximal degree in co-relation 0. Up to 33 conditions per place. [2022-11-02 20:44:31,183 INFO L137 encePairwiseOnDemand]: 658/664 looper letters, 52 selfloop transitions, 45 changer transitions 0/611 dead transitions. [2022-11-02 20:44:31,183 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 658 places, 611 transitions, 1864 flow [2022-11-02 20:44:31,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-02 20:44:31,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-02 20:44:31,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 23730 transitions. [2022-11-02 20:44:31,194 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7941767068273092 [2022-11-02 20:44:31,194 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 23730 transitions. [2022-11-02 20:44:31,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 23730 transitions. [2022-11-02 20:44:31,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:31,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 23730 transitions. [2022-11-02 20:44:31,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 527.3333333333334) internal successors, (23730), 45 states have internal predecessors, (23730), 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 20:44:31,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 664.0) internal successors, (30544), 46 states have internal predecessors, (30544), 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 20:44:31,227 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 664.0) internal successors, (30544), 46 states have internal predecessors, (30544), 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 20:44:31,227 INFO L175 Difference]: Start difference. First operand has 614 places, 560 transitions, 1354 flow. Second operand 45 states and 23730 transitions. [2022-11-02 20:44:31,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 658 places, 611 transitions, 1864 flow [2022-11-02 20:44:31,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 652 places, 611 transitions, 1824 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-02 20:44:31,238 INFO L231 Difference]: Finished difference. Result has 661 places, 585 transitions, 1632 flow [2022-11-02 20:44:31,238 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=664, PETRI_DIFFERENCE_MINUEND_FLOW=1330, PETRI_DIFFERENCE_MINUEND_PLACES=608, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1632, PETRI_PLACES=661, PETRI_TRANSITIONS=585} [2022-11-02 20:44:31,239 INFO L287 CegarLoopForPetriNet]: 589 programPoint places, 72 predicate places. [2022-11-02 20:44:31,239 INFO L495 AbstractCegarLoop]: Abstraction has has 661 places, 585 transitions, 1632 flow [2022-11-02 20:44:31,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 527.7941176470588) internal successors, (17945), 34 states have internal predecessors, (17945), 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 20:44:31,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:31,241 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:31,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-11-02 20:44:31,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:31,442 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:31,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:31,442 INFO L85 PathProgramCache]: Analyzing trace with hash 828442231, now seen corresponding path program 1 times [2022-11-02 20:44:31,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:31,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766436695] [2022-11-02 20:44:31,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:31,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:31,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:32,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:32,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:32,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766436695] [2022-11-02 20:44:32,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766436695] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:32,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542522631] [2022-11-02 20:44:32,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:32,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:32,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:32,247 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:32,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-02 20:44:32,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:32,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 20:44:32,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:32,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:32,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:33,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:33,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542522631] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:44:33,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:44:33,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-02 20:44:33,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059867590] [2022-11-02 20:44:33,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:33,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-02 20:44:33,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:33,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-02 20:44:33,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-02 20:44:34,003 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 525 out of 664 [2022-11-02 20:44:34,014 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 661 places, 585 transitions, 1632 flow. Second operand has 66 states, 66 states have (on average 527.8939393939394) internal successors, (34841), 66 states have internal predecessors, (34841), 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 20:44:34,014 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:34,014 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 525 of 664 [2022-11-02 20:44:34,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:35,345 INFO L130 PetriNetUnfolder]: 0/686 cut-off events. [2022-11-02 20:44:35,345 INFO L131 PetriNetUnfolder]: For 651/651 co-relation queries the response was YES. [2022-11-02 20:44:35,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1158 conditions, 686 events. 0/686 cut-off events. For 651/651 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1659 event pairs, 0 based on Foata normal form. 4/690 useless extension candidates. Maximal degree in co-relation 0. Up to 32 conditions per place. [2022-11-02 20:44:35,347 INFO L137 encePairwiseOnDemand]: 659/664 looper letters, 57 selfloop transitions, 55 changer transitions 0/616 dead transitions. [2022-11-02 20:44:35,347 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 706 places, 616 transitions, 2082 flow [2022-11-02 20:44:35,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-02 20:44:35,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-11-02 20:44:35,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 30041 transitions. [2022-11-02 20:44:35,360 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7937275417459311 [2022-11-02 20:44:35,360 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 30041 transitions. [2022-11-02 20:44:35,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 30041 transitions. [2022-11-02 20:44:35,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:35,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 30041 transitions. [2022-11-02 20:44:35,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 527.0350877192982) internal successors, (30041), 57 states have internal predecessors, (30041), 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 20:44:35,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 664.0) internal successors, (38512), 58 states have internal predecessors, (38512), 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 20:44:35,403 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 664.0) internal successors, (38512), 58 states have internal predecessors, (38512), 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 20:44:35,403 INFO L175 Difference]: Start difference. First operand has 661 places, 585 transitions, 1632 flow. Second operand 57 states and 30041 transitions. [2022-11-02 20:44:35,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 706 places, 616 transitions, 2082 flow [2022-11-02 20:44:35,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 673 places, 616 transitions, 1929 flow, removed 13 selfloop flow, removed 33 redundant places. [2022-11-02 20:44:35,418 INFO L231 Difference]: Finished difference. Result has 673 places, 583 transitions, 1647 flow [2022-11-02 20:44:35,419 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=664, PETRI_DIFFERENCE_MINUEND_FLOW=1468, PETRI_DIFFERENCE_MINUEND_PLACES=617, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=1647, PETRI_PLACES=673, PETRI_TRANSITIONS=583} [2022-11-02 20:44:35,419 INFO L287 CegarLoopForPetriNet]: 589 programPoint places, 84 predicate places. [2022-11-02 20:44:35,419 INFO L495 AbstractCegarLoop]: Abstraction has has 673 places, 583 transitions, 1647 flow [2022-11-02 20:44:35,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 527.8939393939394) internal successors, (34841), 66 states have internal predecessors, (34841), 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 20:44:35,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:35,425 INFO L208 CegarLoopForPetriNet]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:44:35,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:35,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-11-02 20:44:35,639 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:35,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:35,639 INFO L85 PathProgramCache]: Analyzing trace with hash 444372635, now seen corresponding path program 1 times [2022-11-02 20:44:35,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:35,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151981750] [2022-11-02 20:44:35,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:35,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:35,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:44:35,673 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:44:35,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:44:35,730 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:44:35,730 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:44:35,730 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:44:35,731 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:44:35,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-11-02 20:44:35,731 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-02 20:44:35,732 WARN L233 ceAbstractionStarter]: 18 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:44:35,732 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 19 thread instances. [2022-11-02 20:44:35,799 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:44:35,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 618 places, 697 transitions, 1831 flow [2022-11-02 20:44:36,311 INFO L130 PetriNetUnfolder]: 194/1376 cut-off events. [2022-11-02 20:44:36,311 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2022-11-02 20:44:36,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1624 conditions, 1376 events. 194/1376 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 5004 event pairs, 0 based on Foata normal form. 0/1142 useless extension candidates. Maximal degree in co-relation 1505. Up to 40 conditions per place. [2022-11-02 20:44:36,356 INFO L82 GeneralOperation]: Start removeDead. Operand has 618 places, 697 transitions, 1831 flow [2022-11-02 20:44:36,371 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 618 places, 697 transitions, 1831 flow [2022-11-02 20:44:36,372 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:44:36,372 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;@4e0ca16a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:44:36,372 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:44:36,375 INFO L130 PetriNetUnfolder]: 2/73 cut-off events. [2022-11-02 20:44:36,375 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:44:36,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:36,376 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] [2022-11-02 20:44:36,376 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:36,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:36,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1672739810, now seen corresponding path program 1 times [2022-11-02 20:44:36,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:36,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336580631] [2022-11-02 20:44:36,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:36,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:36,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:36,395 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 20:44:36,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:36,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336580631] [2022-11-02 20:44:36,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336580631] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:44:36,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:44:36,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:44:36,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94960906] [2022-11-02 20:44:36,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:36,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:44:36,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:36,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:44:36,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:44:36,398 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 552 out of 697 [2022-11-02 20:44:36,399 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 618 places, 697 transitions, 1831 flow. Second operand has 3 states, 3 states have (on average 553.0) internal successors, (1659), 3 states have internal predecessors, (1659), 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 20:44:36,399 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:36,399 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 552 of 697 [2022-11-02 20:44:36,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:37,026 INFO L130 PetriNetUnfolder]: 0/1140 cut-off events. [2022-11-02 20:44:37,026 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2022-11-02 20:44:37,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1507 conditions, 1140 events. 0/1140 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4567 event pairs, 0 based on Foata normal form. 6162/7264 useless extension candidates. Maximal degree in co-relation 0. Up to 114 conditions per place. [2022-11-02 20:44:37,028 INFO L137 encePairwiseOnDemand]: 576/697 looper letters, 28 selfloop transitions, 2 changer transitions 11/582 dead transitions. [2022-11-02 20:44:37,028 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 619 places, 582 transitions, 1661 flow [2022-11-02 20:44:37,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:44:37,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:44:37,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1812 transitions. [2022-11-02 20:44:37,030 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.866571018651363 [2022-11-02 20:44:37,030 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1812 transitions. [2022-11-02 20:44:37,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1812 transitions. [2022-11-02 20:44:37,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:37,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1812 transitions. [2022-11-02 20:44:37,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 604.0) internal successors, (1812), 3 states have internal predecessors, (1812), 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 20:44:37,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 697.0) internal successors, (2788), 4 states have internal predecessors, (2788), 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 20:44:37,033 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 697.0) internal successors, (2788), 4 states have internal predecessors, (2788), 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 20:44:37,033 INFO L175 Difference]: Start difference. First operand has 618 places, 697 transitions, 1831 flow. Second operand 3 states and 1812 transitions. [2022-11-02 20:44:37,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 619 places, 582 transitions, 1661 flow [2022-11-02 20:44:37,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 619 places, 582 transitions, 1319 flow, removed 171 selfloop flow, removed 0 redundant places. [2022-11-02 20:44:37,042 INFO L231 Difference]: Finished difference. Result has 620 places, 568 transitions, 1241 flow [2022-11-02 20:44:37,042 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=697, PETRI_DIFFERENCE_MINUEND_FLOW=1251, PETRI_DIFFERENCE_MINUEND_PLACES=617, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1241, PETRI_PLACES=620, PETRI_TRANSITIONS=568} [2022-11-02 20:44:37,042 INFO L287 CegarLoopForPetriNet]: 618 programPoint places, 2 predicate places. [2022-11-02 20:44:37,043 INFO L495 AbstractCegarLoop]: Abstraction has has 620 places, 568 transitions, 1241 flow [2022-11-02 20:44:37,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 553.0) internal successors, (1659), 3 states have internal predecessors, (1659), 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 20:44:37,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:37,043 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] [2022-11-02 20:44:37,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-11-02 20:44:37,043 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:37,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:37,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1470482998, now seen corresponding path program 1 times [2022-11-02 20:44:37,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:37,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740032098] [2022-11-02 20:44:37,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:37,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:37,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:37,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:37,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:37,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740032098] [2022-11-02 20:44:37,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740032098] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:37,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030795399] [2022-11-02 20:44:37,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:37,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:37,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:37,083 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:37,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-02 20:44:37,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:37,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:44:37,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:37,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:37,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:37,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:37,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030795399] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:44:37,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:44:37,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:44:37,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037542915] [2022-11-02 20:44:37,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:37,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:44:37,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:37,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:44:37,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:44:37,546 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 551 out of 697 [2022-11-02 20:44:37,549 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 620 places, 568 transitions, 1241 flow. Second operand has 10 states, 10 states have (on average 553.3) internal successors, (5533), 10 states have internal predecessors, (5533), 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 20:44:37,549 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:37,549 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 551 of 697 [2022-11-02 20:44:37,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:38,117 INFO L130 PetriNetUnfolder]: 0/909 cut-off events. [2022-11-02 20:44:38,117 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-11-02 20:44:38,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1162 conditions, 909 events. 0/909 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2979 event pairs, 0 based on Foata normal form. 2/911 useless extension candidates. Maximal degree in co-relation 0. Up to 71 conditions per place. [2022-11-02 20:44:38,120 INFO L137 encePairwiseOnDemand]: 691/697 looper letters, 29 selfloop transitions, 9 changer transitions 0/578 dead transitions. [2022-11-02 20:44:38,120 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 617 places, 578 transitions, 1339 flow [2022-11-02 20:44:38,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:44:38,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:44:38,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4999 transitions. [2022-11-02 20:44:38,124 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7969073808385143 [2022-11-02 20:44:38,124 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4999 transitions. [2022-11-02 20:44:38,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4999 transitions. [2022-11-02 20:44:38,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:38,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4999 transitions. [2022-11-02 20:44:38,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 555.4444444444445) internal successors, (4999), 9 states have internal predecessors, (4999), 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 20:44:38,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 697.0) internal successors, (6970), 10 states have internal predecessors, (6970), 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 20:44:38,132 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 697.0) internal successors, (6970), 10 states have internal predecessors, (6970), 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 20:44:38,132 INFO L175 Difference]: Start difference. First operand has 620 places, 568 transitions, 1241 flow. Second operand 9 states and 4999 transitions. [2022-11-02 20:44:38,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 617 places, 578 transitions, 1339 flow [2022-11-02 20:44:38,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 616 places, 578 transitions, 1337 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:44:38,140 INFO L231 Difference]: Finished difference. Result has 619 places, 574 transitions, 1289 flow [2022-11-02 20:44:38,140 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=697, PETRI_DIFFERENCE_MINUEND_FLOW=1239, PETRI_DIFFERENCE_MINUEND_PLACES=608, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1289, PETRI_PLACES=619, PETRI_TRANSITIONS=574} [2022-11-02 20:44:38,141 INFO L287 CegarLoopForPetriNet]: 618 programPoint places, 1 predicate places. [2022-11-02 20:44:38,141 INFO L495 AbstractCegarLoop]: Abstraction has has 619 places, 574 transitions, 1289 flow [2022-11-02 20:44:38,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 553.3) internal successors, (5533), 10 states have internal predecessors, (5533), 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 20:44:38,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:38,142 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:38,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:38,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:38,342 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:38,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:38,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1494018209, now seen corresponding path program 1 times [2022-11-02 20:44:38,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:38,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034323819] [2022-11-02 20:44:38,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:38,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:38,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:38,432 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:38,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:38,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034323819] [2022-11-02 20:44:38,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034323819] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:38,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206039181] [2022-11-02 20:44:38,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:38,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:38,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:38,435 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:38,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-11-02 20:44:38,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:38,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:44:38,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:38,901 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:38,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:39,020 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:39,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206039181] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:44:39,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:44:39,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:44:39,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842743508] [2022-11-02 20:44:39,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:39,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:44:39,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:39,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:44:39,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:44:39,028 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 551 out of 697 [2022-11-02 20:44:39,032 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 619 places, 574 transitions, 1289 flow. Second operand has 18 states, 18 states have (on average 553.6111111111111) internal successors, (9965), 18 states have internal predecessors, (9965), 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 20:44:39,032 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:39,032 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 551 of 697 [2022-11-02 20:44:39,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:39,631 INFO L130 PetriNetUnfolder]: 0/865 cut-off events. [2022-11-02 20:44:39,631 INFO L131 PetriNetUnfolder]: For 108/108 co-relation queries the response was YES. [2022-11-02 20:44:39,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1251 conditions, 865 events. 0/865 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2685 event pairs, 0 based on Foata normal form. 4/869 useless extension candidates. Maximal degree in co-relation 0. Up to 55 conditions per place. [2022-11-02 20:44:39,633 INFO L137 encePairwiseOnDemand]: 691/697 looper letters, 37 selfloop transitions, 21 changer transitions 0/598 dead transitions. [2022-11-02 20:44:39,633 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 639 places, 598 transitions, 1513 flow [2022-11-02 20:44:39,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:44:39,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:44:39,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 11633 transitions. [2022-11-02 20:44:39,640 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.79476668716267 [2022-11-02 20:44:39,640 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 11633 transitions. [2022-11-02 20:44:39,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 11633 transitions. [2022-11-02 20:44:39,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:39,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 11633 transitions. [2022-11-02 20:44:39,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 553.952380952381) internal successors, (11633), 21 states have internal predecessors, (11633), 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 20:44:39,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 697.0) internal successors, (15334), 22 states have internal predecessors, (15334), 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 20:44:39,658 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 697.0) internal successors, (15334), 22 states have internal predecessors, (15334), 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 20:44:39,658 INFO L175 Difference]: Start difference. First operand has 619 places, 574 transitions, 1289 flow. Second operand 21 states and 11633 transitions. [2022-11-02 20:44:39,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 639 places, 598 transitions, 1513 flow [2022-11-02 20:44:39,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 638 places, 598 transitions, 1499 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:44:39,665 INFO L231 Difference]: Finished difference. Result has 643 places, 587 transitions, 1413 flow [2022-11-02 20:44:39,665 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=697, PETRI_DIFFERENCE_MINUEND_FLOW=1283, PETRI_DIFFERENCE_MINUEND_PLACES=618, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1413, PETRI_PLACES=643, PETRI_TRANSITIONS=587} [2022-11-02 20:44:39,666 INFO L287 CegarLoopForPetriNet]: 618 programPoint places, 25 predicate places. [2022-11-02 20:44:39,666 INFO L495 AbstractCegarLoop]: Abstraction has has 643 places, 587 transitions, 1413 flow [2022-11-02 20:44:39,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 553.6111111111111) internal successors, (9965), 18 states have internal predecessors, (9965), 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 20:44:39,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:39,667 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:39,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-11-02 20:44:39,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:39,871 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:39,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:39,871 INFO L85 PathProgramCache]: Analyzing trace with hash -432379517, now seen corresponding path program 1 times [2022-11-02 20:44:39,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:39,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263892425] [2022-11-02 20:44:39,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:39,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:39,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:40,087 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:40,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:40,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263892425] [2022-11-02 20:44:40,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263892425] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:40,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440520574] [2022-11-02 20:44:40,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:40,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:40,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:40,090 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:40,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-02 20:44:40,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:40,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:44:40,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:40,704 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:40,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:41,062 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:41,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440520574] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:44:41,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:44:41,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-02 20:44:41,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832503371] [2022-11-02 20:44:41,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:41,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:44:41,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:41,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:44:41,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:44:41,076 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 551 out of 697 [2022-11-02 20:44:41,086 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 643 places, 587 transitions, 1413 flow. Second operand has 34 states, 34 states have (on average 553.7941176470588) internal successors, (18829), 34 states have internal predecessors, (18829), 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 20:44:41,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:41,086 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 551 of 697 [2022-11-02 20:44:41,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:42,102 INFO L130 PetriNetUnfolder]: 0/777 cut-off events. [2022-11-02 20:44:42,102 INFO L131 PetriNetUnfolder]: For 384/384 co-relation queries the response was YES. [2022-11-02 20:44:42,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1242 conditions, 777 events. 0/777 cut-off events. For 384/384 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2101 event pairs, 0 based on Foata normal form. 8/785 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2022-11-02 20:44:42,104 INFO L137 encePairwiseOnDemand]: 691/697 looper letters, 53 selfloop transitions, 45 changer transitions 0/638 dead transitions. [2022-11-02 20:44:42,104 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 687 places, 638 transitions, 1925 flow [2022-11-02 20:44:42,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-02 20:44:42,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-02 20:44:42,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 24901 transitions. [2022-11-02 20:44:42,116 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7939104096923322 [2022-11-02 20:44:42,117 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 24901 transitions. [2022-11-02 20:44:42,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 24901 transitions. [2022-11-02 20:44:42,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:42,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 24901 transitions. [2022-11-02 20:44:42,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 553.3555555555556) internal successors, (24901), 45 states have internal predecessors, (24901), 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 20:44:42,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 697.0) internal successors, (32062), 46 states have internal predecessors, (32062), 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 20:44:42,152 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 697.0) internal successors, (32062), 46 states have internal predecessors, (32062), 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 20:44:42,152 INFO L175 Difference]: Start difference. First operand has 643 places, 587 transitions, 1413 flow. Second operand 45 states and 24901 transitions. [2022-11-02 20:44:42,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 687 places, 638 transitions, 1925 flow [2022-11-02 20:44:42,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 681 places, 638 transitions, 1885 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-02 20:44:42,162 INFO L231 Difference]: Finished difference. Result has 690 places, 612 transitions, 1691 flow [2022-11-02 20:44:42,162 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=697, PETRI_DIFFERENCE_MINUEND_FLOW=1389, PETRI_DIFFERENCE_MINUEND_PLACES=637, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1691, PETRI_PLACES=690, PETRI_TRANSITIONS=612} [2022-11-02 20:44:42,162 INFO L287 CegarLoopForPetriNet]: 618 programPoint places, 72 predicate places. [2022-11-02 20:44:42,163 INFO L495 AbstractCegarLoop]: Abstraction has has 690 places, 612 transitions, 1691 flow [2022-11-02 20:44:42,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 553.7941176470588) internal successors, (18829), 34 states have internal predecessors, (18829), 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 20:44:42,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:42,165 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:42,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:42,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:42,366 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:42,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:42,366 INFO L85 PathProgramCache]: Analyzing trace with hash 439149431, now seen corresponding path program 1 times [2022-11-02 20:44:42,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:42,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661033724] [2022-11-02 20:44:42,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:42,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:42,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:43,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:43,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:43,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661033724] [2022-11-02 20:44:43,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661033724] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:43,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638672119] [2022-11-02 20:44:43,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:43,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:43,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:43,160 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:43,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-02 20:44:43,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:43,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 20:44:43,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:43,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:43,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:44,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:44,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638672119] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:44:44,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:44:44,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-02 20:44:44,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553213388] [2022-11-02 20:44:44,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:44,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-02 20:44:44,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:44,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-02 20:44:44,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-02 20:44:44,881 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 551 out of 697 [2022-11-02 20:44:44,898 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 690 places, 612 transitions, 1691 flow. Second operand has 66 states, 66 states have (on average 553.8939393939394) internal successors, (36557), 66 states have internal predecessors, (36557), 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 20:44:44,898 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:44,899 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 551 of 697 [2022-11-02 20:44:44,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:46,340 INFO L130 PetriNetUnfolder]: 0/722 cut-off events. [2022-11-02 20:44:46,340 INFO L131 PetriNetUnfolder]: For 772/772 co-relation queries the response was YES. [2022-11-02 20:44:46,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1221 conditions, 722 events. 0/722 cut-off events. For 772/772 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1757 event pairs, 0 based on Foata normal form. 5/727 useless extension candidates. Maximal degree in co-relation 0. Up to 34 conditions per place. [2022-11-02 20:44:46,342 INFO L137 encePairwiseOnDemand]: 692/697 looper letters, 60 selfloop transitions, 58 changer transitions 0/648 dead transitions. [2022-11-02 20:44:46,342 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 738 places, 648 transitions, 2197 flow [2022-11-02 20:44:46,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-02 20:44:46,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-11-02 20:44:46,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 33183 transitions. [2022-11-02 20:44:46,359 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7934720229555237 [2022-11-02 20:44:46,359 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 33183 transitions. [2022-11-02 20:44:46,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 33183 transitions. [2022-11-02 20:44:46,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:46,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 33183 transitions. [2022-11-02 20:44:46,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 553.05) internal successors, (33183), 60 states have internal predecessors, (33183), 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 20:44:46,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 697.0) internal successors, (42517), 61 states have internal predecessors, (42517), 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 20:44:46,408 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 697.0) internal successors, (42517), 61 states have internal predecessors, (42517), 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 20:44:46,408 INFO L175 Difference]: Start difference. First operand has 690 places, 612 transitions, 1691 flow. Second operand 60 states and 33183 transitions. [2022-11-02 20:44:46,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 738 places, 648 transitions, 2197 flow [2022-11-02 20:44:46,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 705 places, 648 transitions, 2036 flow, removed 14 selfloop flow, removed 33 redundant places. [2022-11-02 20:44:46,419 INFO L231 Difference]: Finished difference. Result has 705 places, 613 transitions, 1735 flow [2022-11-02 20:44:46,419 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=697, PETRI_DIFFERENCE_MINUEND_FLOW=1527, PETRI_DIFFERENCE_MINUEND_PLACES=646, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=1735, PETRI_PLACES=705, PETRI_TRANSITIONS=613} [2022-11-02 20:44:46,420 INFO L287 CegarLoopForPetriNet]: 618 programPoint places, 87 predicate places. [2022-11-02 20:44:46,420 INFO L495 AbstractCegarLoop]: Abstraction has has 705 places, 613 transitions, 1735 flow [2022-11-02 20:44:46,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 553.8939393939394) internal successors, (36557), 66 states have internal predecessors, (36557), 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 20:44:46,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:46,425 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:44:46,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:46,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:46,626 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:46,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:46,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1902582593, now seen corresponding path program 1 times [2022-11-02 20:44:46,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:46,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489319808] [2022-11-02 20:44:46,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:46,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:46,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:44:46,657 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:44:46,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:44:46,720 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:44:46,720 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:44:46,721 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:44:46,721 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:44:46,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-11-02 20:44:46,721 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-02 20:44:46,722 WARN L233 ceAbstractionStarter]: 19 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:44:46,722 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 20 thread instances. [2022-11-02 20:44:46,779 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:44:46,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 647 places, 730 transitions, 1940 flow [2022-11-02 20:44:47,300 INFO L130 PetriNetUnfolder]: 204/1445 cut-off events. [2022-11-02 20:44:47,300 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2022-11-02 20:44:47,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1716 conditions, 1445 events. 204/1445 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 5280 event pairs, 0 based on Foata normal form. 0/1199 useless extension candidates. Maximal degree in co-relation 1596. Up to 42 conditions per place. [2022-11-02 20:44:47,381 INFO L82 GeneralOperation]: Start removeDead. Operand has 647 places, 730 transitions, 1940 flow [2022-11-02 20:44:47,402 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 647 places, 730 transitions, 1940 flow [2022-11-02 20:44:47,402 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:44:47,402 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;@4e0ca16a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:44:47,403 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:44:47,406 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-02 20:44:47,406 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:44:47,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:47,406 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] [2022-11-02 20:44:47,406 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:47,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:47,407 INFO L85 PathProgramCache]: Analyzing trace with hash -2123599711, now seen corresponding path program 1 times [2022-11-02 20:44:47,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:47,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014310366] [2022-11-02 20:44:47,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:47,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:47,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:47,421 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 20:44:47,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:47,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014310366] [2022-11-02 20:44:47,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014310366] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:44:47,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:44:47,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:44:47,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609131906] [2022-11-02 20:44:47,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:47,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:44:47,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:47,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:44:47,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:44:47,425 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 585 out of 730 [2022-11-02 20:44:47,425 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 647 places, 730 transitions, 1940 flow. Second operand has 2 states, 2 states have (on average 585.5) internal successors, (1171), 2 states have internal predecessors, (1171), 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 20:44:47,426 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:47,426 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 585 of 730 [2022-11-02 20:44:47,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:48,034 INFO L130 PetriNetUnfolder]: 0/1220 cut-off events. [2022-11-02 20:44:48,035 INFO L131 PetriNetUnfolder]: For 1730/1730 co-relation queries the response was YES. [2022-11-02 20:44:48,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1512 conditions, 1220 events. 0/1220 cut-off events. For 1730/1730 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4908 event pairs, 0 based on Foata normal form. 1232/2410 useless extension candidates. Maximal degree in co-relation 0. Up to 21 conditions per place. [2022-11-02 20:44:48,037 INFO L137 encePairwiseOnDemand]: 606/730 looper letters, 20 selfloop transitions, 0 changer transitions 11/605 dead transitions. [2022-11-02 20:44:48,037 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 647 places, 605 transitions, 1730 flow [2022-11-02 20:44:48,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:44:48,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:44:48,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1314 transitions. [2022-11-02 20:44:48,039 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9 [2022-11-02 20:44:48,039 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1314 transitions. [2022-11-02 20:44:48,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1314 transitions. [2022-11-02 20:44:48,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:48,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1314 transitions. [2022-11-02 20:44:48,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 657.0) internal successors, (1314), 2 states have internal predecessors, (1314), 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 20:44:48,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 730.0) internal successors, (2190), 3 states have internal predecessors, (2190), 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 20:44:48,041 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 730.0) internal successors, (2190), 3 states have internal predecessors, (2190), 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 20:44:48,041 INFO L175 Difference]: Start difference. First operand has 647 places, 730 transitions, 1940 flow. Second operand 2 states and 1314 transitions. [2022-11-02 20:44:48,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 647 places, 605 transitions, 1730 flow [2022-11-02 20:44:48,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 647 places, 605 transitions, 1350 flow, removed 190 selfloop flow, removed 0 redundant places. [2022-11-02 20:44:48,051 INFO L231 Difference]: Finished difference. Result has 647 places, 594 transitions, 1288 flow [2022-11-02 20:44:48,051 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=730, PETRI_DIFFERENCE_MINUEND_FLOW=1310, PETRI_DIFFERENCE_MINUEND_PLACES=646, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1288, PETRI_PLACES=647, PETRI_TRANSITIONS=594} [2022-11-02 20:44:48,052 INFO L287 CegarLoopForPetriNet]: 647 programPoint places, 0 predicate places. [2022-11-02 20:44:48,052 INFO L495 AbstractCegarLoop]: Abstraction has has 647 places, 594 transitions, 1288 flow [2022-11-02 20:44:48,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 585.5) internal successors, (1171), 2 states have internal predecessors, (1171), 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 20:44:48,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:48,053 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] [2022-11-02 20:44:48,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-11-02 20:44:48,053 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:48,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:48,054 INFO L85 PathProgramCache]: Analyzing trace with hash 374416226, now seen corresponding path program 1 times [2022-11-02 20:44:48,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:48,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260125594] [2022-11-02 20:44:48,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:48,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:48,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:48,076 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 20:44:48,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:48,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260125594] [2022-11-02 20:44:48,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260125594] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:44:48,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:44:48,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:44:48,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445097967] [2022-11-02 20:44:48,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:48,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:44:48,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:48,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:44:48,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:44:48,079 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 578 out of 730 [2022-11-02 20:44:48,080 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 647 places, 594 transitions, 1288 flow. Second operand has 3 states, 3 states have (on average 579.0) internal successors, (1737), 3 states have internal predecessors, (1737), 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 20:44:48,080 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:48,080 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 578 of 730 [2022-11-02 20:44:48,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:48,531 INFO L130 PetriNetUnfolder]: 0/978 cut-off events. [2022-11-02 20:44:48,531 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-02 20:44:48,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1185 conditions, 978 events. 0/978 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3280 event pairs, 0 based on Foata normal form. 0/958 useless extension candidates. Maximal degree in co-relation 0. Up to 120 conditions per place. [2022-11-02 20:44:48,533 INFO L137 encePairwiseOnDemand]: 727/730 looper letters, 29 selfloop transitions, 2 changer transitions 0/598 dead transitions. [2022-11-02 20:44:48,533 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 638 places, 598 transitions, 1358 flow [2022-11-02 20:44:48,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:44:48,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:44:48,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1766 transitions. [2022-11-02 20:44:48,535 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.806392694063927 [2022-11-02 20:44:48,535 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1766 transitions. [2022-11-02 20:44:48,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1766 transitions. [2022-11-02 20:44:48,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:48,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1766 transitions. [2022-11-02 20:44:48,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 588.6666666666666) internal successors, (1766), 3 states have internal predecessors, (1766), 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 20:44:48,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 730.0) internal successors, (2920), 4 states have internal predecessors, (2920), 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 20:44:48,540 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 730.0) internal successors, (2920), 4 states have internal predecessors, (2920), 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 20:44:48,540 INFO L175 Difference]: Start difference. First operand has 647 places, 594 transitions, 1288 flow. Second operand 3 states and 1766 transitions. [2022-11-02 20:44:48,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 638 places, 598 transitions, 1358 flow [2022-11-02 20:44:48,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 638 places, 598 transitions, 1358 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:44:48,550 INFO L231 Difference]: Finished difference. Result has 639 places, 595 transitions, 1300 flow [2022-11-02 20:44:48,551 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=730, PETRI_DIFFERENCE_MINUEND_FLOW=1288, PETRI_DIFFERENCE_MINUEND_PLACES=636, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1300, PETRI_PLACES=639, PETRI_TRANSITIONS=595} [2022-11-02 20:44:48,552 INFO L287 CegarLoopForPetriNet]: 647 programPoint places, -8 predicate places. [2022-11-02 20:44:48,552 INFO L495 AbstractCegarLoop]: Abstraction has has 639 places, 595 transitions, 1300 flow [2022-11-02 20:44:48,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 579.0) internal successors, (1737), 3 states have internal predecessors, (1737), 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 20:44:48,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:48,553 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] [2022-11-02 20:44:48,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-11-02 20:44:48,553 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:48,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:48,553 INFO L85 PathProgramCache]: Analyzing trace with hash 87751190, now seen corresponding path program 1 times [2022-11-02 20:44:48,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:48,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399453734] [2022-11-02 20:44:48,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:48,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:48,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:48,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:48,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:48,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399453734] [2022-11-02 20:44:48,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399453734] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:48,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327000452] [2022-11-02 20:44:48,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:48,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:48,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:48,619 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:48,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-11-02 20:44:49,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:49,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:44:49,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:49,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:49,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:49,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:49,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327000452] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:44:49,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:44:49,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:44:49,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146358130] [2022-11-02 20:44:49,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:49,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:44:49,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:49,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:44:49,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:44:49,112 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 577 out of 730 [2022-11-02 20:44:49,115 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 639 places, 595 transitions, 1300 flow. Second operand has 10 states, 10 states have (on average 579.3) internal successors, (5793), 10 states have internal predecessors, (5793), 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 20:44:49,115 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:49,115 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 577 of 730 [2022-11-02 20:44:49,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:49,859 INFO L130 PetriNetUnfolder]: 0/956 cut-off events. [2022-11-02 20:44:49,859 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-11-02 20:44:49,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1223 conditions, 956 events. 0/956 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3150 event pairs, 0 based on Foata normal form. 2/958 useless extension candidates. Maximal degree in co-relation 0. Up to 75 conditions per place. [2022-11-02 20:44:49,861 INFO L137 encePairwiseOnDemand]: 724/730 looper letters, 30 selfloop transitions, 9 changer transitions 0/605 dead transitions. [2022-11-02 20:44:49,861 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 647 places, 605 transitions, 1400 flow [2022-11-02 20:44:49,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:44:49,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:44:49,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 5234 transitions. [2022-11-02 20:44:49,865 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7966514459665145 [2022-11-02 20:44:49,865 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 5234 transitions. [2022-11-02 20:44:49,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 5234 transitions. [2022-11-02 20:44:49,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:49,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 5234 transitions. [2022-11-02 20:44:49,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 581.5555555555555) internal successors, (5234), 9 states have internal predecessors, (5234), 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 20:44:49,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 730.0) internal successors, (7300), 10 states have internal predecessors, (7300), 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 20:44:49,873 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 730.0) internal successors, (7300), 10 states have internal predecessors, (7300), 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 20:44:49,873 INFO L175 Difference]: Start difference. First operand has 639 places, 595 transitions, 1300 flow. Second operand 9 states and 5234 transitions. [2022-11-02 20:44:49,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 647 places, 605 transitions, 1400 flow [2022-11-02 20:44:49,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 646 places, 605 transitions, 1398 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:44:49,880 INFO L231 Difference]: Finished difference. Result has 649 places, 601 transitions, 1348 flow [2022-11-02 20:44:49,880 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=730, PETRI_DIFFERENCE_MINUEND_FLOW=1298, PETRI_DIFFERENCE_MINUEND_PLACES=638, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1348, PETRI_PLACES=649, PETRI_TRANSITIONS=601} [2022-11-02 20:44:49,880 INFO L287 CegarLoopForPetriNet]: 647 programPoint places, 2 predicate places. [2022-11-02 20:44:49,881 INFO L495 AbstractCegarLoop]: Abstraction has has 649 places, 601 transitions, 1348 flow [2022-11-02 20:44:49,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 579.3) internal successors, (5793), 10 states have internal predecessors, (5793), 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 20:44:49,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:49,881 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:49,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-11-02 20:44:50,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:50,082 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:50,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:50,082 INFO L85 PathProgramCache]: Analyzing trace with hash -151830207, now seen corresponding path program 1 times [2022-11-02 20:44:50,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:50,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203350523] [2022-11-02 20:44:50,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:50,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:50,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:50,156 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:50,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:50,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203350523] [2022-11-02 20:44:50,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203350523] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:50,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977406113] [2022-11-02 20:44:50,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:50,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:50,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:50,158 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:50,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-11-02 20:44:50,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:50,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:44:50,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:50,665 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:50,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:50,754 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:50,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977406113] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:44:50,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:44:50,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:44:50,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553902163] [2022-11-02 20:44:50,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:50,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:44:50,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:50,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:44:50,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:44:50,760 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 577 out of 730 [2022-11-02 20:44:50,764 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 649 places, 601 transitions, 1348 flow. Second operand has 18 states, 18 states have (on average 579.6111111111111) internal successors, (10433), 18 states have internal predecessors, (10433), 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 20:44:50,764 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:50,764 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 577 of 730 [2022-11-02 20:44:50,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:51,509 INFO L130 PetriNetUnfolder]: 0/912 cut-off events. [2022-11-02 20:44:51,510 INFO L131 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2022-11-02 20:44:51,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1320 conditions, 912 events. 0/912 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2858 event pairs, 0 based on Foata normal form. 4/916 useless extension candidates. Maximal degree in co-relation 0. Up to 59 conditions per place. [2022-11-02 20:44:51,512 INFO L137 encePairwiseOnDemand]: 724/730 looper letters, 38 selfloop transitions, 21 changer transitions 0/625 dead transitions. [2022-11-02 20:44:51,512 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 669 places, 625 transitions, 1574 flow [2022-11-02 20:44:51,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:44:51,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:44:51,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 12180 transitions. [2022-11-02 20:44:51,518 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7945205479452054 [2022-11-02 20:44:51,518 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 12180 transitions. [2022-11-02 20:44:51,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 12180 transitions. [2022-11-02 20:44:51,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:51,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 12180 transitions. [2022-11-02 20:44:51,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 580.0) internal successors, (12180), 21 states have internal predecessors, (12180), 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 20:44:51,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 730.0) internal successors, (16060), 22 states have internal predecessors, (16060), 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 20:44:51,536 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 730.0) internal successors, (16060), 22 states have internal predecessors, (16060), 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 20:44:51,536 INFO L175 Difference]: Start difference. First operand has 649 places, 601 transitions, 1348 flow. Second operand 21 states and 12180 transitions. [2022-11-02 20:44:51,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 669 places, 625 transitions, 1574 flow [2022-11-02 20:44:51,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 668 places, 625 transitions, 1560 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:44:51,543 INFO L231 Difference]: Finished difference. Result has 673 places, 614 transitions, 1472 flow [2022-11-02 20:44:51,544 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=730, PETRI_DIFFERENCE_MINUEND_FLOW=1342, PETRI_DIFFERENCE_MINUEND_PLACES=648, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=590, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1472, PETRI_PLACES=673, PETRI_TRANSITIONS=614} [2022-11-02 20:44:51,544 INFO L287 CegarLoopForPetriNet]: 647 programPoint places, 26 predicate places. [2022-11-02 20:44:51,544 INFO L495 AbstractCegarLoop]: Abstraction has has 673 places, 614 transitions, 1472 flow [2022-11-02 20:44:51,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 579.6111111111111) internal successors, (10433), 18 states have internal predecessors, (10433), 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 20:44:51,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:51,546 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:51,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-11-02 20:44:51,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:51,747 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:51,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:51,748 INFO L85 PathProgramCache]: Analyzing trace with hash -2060487773, now seen corresponding path program 1 times [2022-11-02 20:44:51,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:51,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857377001] [2022-11-02 20:44:51,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:51,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:51,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:51,932 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:51,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:51,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857377001] [2022-11-02 20:44:51,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857377001] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:51,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96936754] [2022-11-02 20:44:51,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:51,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:51,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:51,935 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:51,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-11-02 20:44:52,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:52,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:44:52,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:52,535 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:52,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:52,841 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:52,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96936754] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:44:52,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:44:52,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-02 20:44:52,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138352933] [2022-11-02 20:44:52,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:52,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:44:52,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:52,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:44:52,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:44:52,853 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 577 out of 730 [2022-11-02 20:44:52,859 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 673 places, 614 transitions, 1472 flow. Second operand has 34 states, 34 states have (on average 579.7941176470588) internal successors, (19713), 34 states have internal predecessors, (19713), 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 20:44:52,859 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:52,859 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 577 of 730 [2022-11-02 20:44:52,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:53,973 INFO L130 PetriNetUnfolder]: 0/824 cut-off events. [2022-11-02 20:44:53,973 INFO L131 PetriNetUnfolder]: For 411/411 co-relation queries the response was YES. [2022-11-02 20:44:53,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1320 conditions, 824 events. 0/824 cut-off events. For 411/411 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2268 event pairs, 0 based on Foata normal form. 8/832 useless extension candidates. Maximal degree in co-relation 0. Up to 37 conditions per place. [2022-11-02 20:44:53,975 INFO L137 encePairwiseOnDemand]: 724/730 looper letters, 54 selfloop transitions, 45 changer transitions 0/665 dead transitions. [2022-11-02 20:44:53,975 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 717 places, 665 transitions, 1986 flow [2022-11-02 20:44:53,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-02 20:44:53,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-02 20:44:53,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 26072 transitions. [2022-11-02 20:44:53,989 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7936681887366819 [2022-11-02 20:44:53,989 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 26072 transitions. [2022-11-02 20:44:53,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 26072 transitions. [2022-11-02 20:44:53,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:53,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 26072 transitions. [2022-11-02 20:44:54,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 579.3777777777777) internal successors, (26072), 45 states have internal predecessors, (26072), 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 20:44:54,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 730.0) internal successors, (33580), 46 states have internal predecessors, (33580), 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 20:44:54,028 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 730.0) internal successors, (33580), 46 states have internal predecessors, (33580), 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 20:44:54,028 INFO L175 Difference]: Start difference. First operand has 673 places, 614 transitions, 1472 flow. Second operand 45 states and 26072 transitions. [2022-11-02 20:44:54,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 717 places, 665 transitions, 1986 flow [2022-11-02 20:44:54,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 711 places, 665 transitions, 1946 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-02 20:44:54,046 INFO L231 Difference]: Finished difference. Result has 720 places, 639 transitions, 1750 flow [2022-11-02 20:44:54,047 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=730, PETRI_DIFFERENCE_MINUEND_FLOW=1448, PETRI_DIFFERENCE_MINUEND_PLACES=667, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1750, PETRI_PLACES=720, PETRI_TRANSITIONS=639} [2022-11-02 20:44:54,047 INFO L287 CegarLoopForPetriNet]: 647 programPoint places, 73 predicate places. [2022-11-02 20:44:54,047 INFO L495 AbstractCegarLoop]: Abstraction has has 720 places, 639 transitions, 1750 flow [2022-11-02 20:44:54,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 579.7941176470588) internal successors, (19713), 34 states have internal predecessors, (19713), 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 20:44:54,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:54,051 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:54,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-11-02 20:44:54,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-11-02 20:44:54,255 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:54,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:54,255 INFO L85 PathProgramCache]: Analyzing trace with hash -131018601, now seen corresponding path program 1 times [2022-11-02 20:44:54,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:54,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985275470] [2022-11-02 20:44:54,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:54,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:54,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:54,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:54,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:54,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985275470] [2022-11-02 20:44:54,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985275470] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:54,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562981264] [2022-11-02 20:44:54,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:54,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:54,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:54,902 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:54,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-11-02 20:44:55,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:55,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 20:44:55,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:55,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:55,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:56,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:56,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562981264] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:44:56,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:44:56,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-02 20:44:56,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552983526] [2022-11-02 20:44:56,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:56,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-02 20:44:56,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:56,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-02 20:44:56,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-02 20:44:56,646 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 577 out of 730 [2022-11-02 20:44:56,659 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 720 places, 639 transitions, 1750 flow. Second operand has 66 states, 66 states have (on average 579.8939393939394) internal successors, (38273), 66 states have internal predecessors, (38273), 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 20:44:56,660 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:56,660 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 577 of 730 [2022-11-02 20:44:56,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:44:58,239 INFO L130 PetriNetUnfolder]: 0/758 cut-off events. [2022-11-02 20:44:58,239 INFO L131 PetriNetUnfolder]: For 893/893 co-relation queries the response was YES. [2022-11-02 20:44:58,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1285 conditions, 758 events. 0/758 cut-off events. For 893/893 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1855 event pairs, 0 based on Foata normal form. 6/764 useless extension candidates. Maximal degree in co-relation 0. Up to 36 conditions per place. [2022-11-02 20:44:58,241 INFO L137 encePairwiseOnDemand]: 725/730 looper letters, 63 selfloop transitions, 61 changer transitions 0/680 dead transitions. [2022-11-02 20:44:58,241 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 771 places, 680 transitions, 2312 flow [2022-11-02 20:44:58,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-02 20:44:58,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-11-02 20:44:58,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 36481 transitions. [2022-11-02 20:44:58,264 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.793237660360948 [2022-11-02 20:44:58,264 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 36481 transitions. [2022-11-02 20:44:58,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 36481 transitions. [2022-11-02 20:44:58,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:44:58,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 36481 transitions. [2022-11-02 20:44:58,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 579.063492063492) internal successors, (36481), 63 states have internal predecessors, (36481), 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 20:44:58,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 730.0) internal successors, (46720), 64 states have internal predecessors, (46720), 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 20:44:58,336 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 730.0) internal successors, (46720), 64 states have internal predecessors, (46720), 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 20:44:58,336 INFO L175 Difference]: Start difference. First operand has 720 places, 639 transitions, 1750 flow. Second operand 63 states and 36481 transitions. [2022-11-02 20:44:58,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 771 places, 680 transitions, 2312 flow [2022-11-02 20:44:58,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 738 places, 680 transitions, 2143 flow, removed 15 selfloop flow, removed 33 redundant places. [2022-11-02 20:44:58,353 INFO L231 Difference]: Finished difference. Result has 738 places, 643 transitions, 1823 flow [2022-11-02 20:44:58,354 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=730, PETRI_DIFFERENCE_MINUEND_FLOW=1586, PETRI_DIFFERENCE_MINUEND_PLACES=676, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=1823, PETRI_PLACES=738, PETRI_TRANSITIONS=643} [2022-11-02 20:44:58,354 INFO L287 CegarLoopForPetriNet]: 647 programPoint places, 91 predicate places. [2022-11-02 20:44:58,354 INFO L495 AbstractCegarLoop]: Abstraction has has 738 places, 643 transitions, 1823 flow [2022-11-02 20:44:58,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 579.8939393939394) internal successors, (38273), 66 states have internal predecessors, (38273), 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 20:44:58,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:58,359 INFO L208 CegarLoopForPetriNet]: trace histogram [21, 21, 21, 21, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:44:58,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:58,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-11-02 20:44:58,559 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:58,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:58,559 INFO L85 PathProgramCache]: Analyzing trace with hash -988310136, now seen corresponding path program 1 times [2022-11-02 20:44:58,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:58,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841719938] [2022-11-02 20:44:58,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:58,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:58,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:44:58,599 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:44:58,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:44:58,665 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:44:58,665 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:44:58,665 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:44:58,666 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:44:58,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-11-02 20:44:58,666 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:58,666 WARN L233 ceAbstractionStarter]: 20 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:44:58,667 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 21 thread instances. [2022-11-02 20:44:58,729 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:44:58,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 676 places, 763 transitions, 2051 flow [2022-11-02 20:44:59,552 INFO L130 PetriNetUnfolder]: 214/1514 cut-off events. [2022-11-02 20:44:59,552 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2022-11-02 20:44:59,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1809 conditions, 1514 events. 214/1514 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 5525 event pairs, 0 based on Foata normal form. 0/1256 useless extension candidates. Maximal degree in co-relation 1688. Up to 44 conditions per place. [2022-11-02 20:44:59,664 INFO L82 GeneralOperation]: Start removeDead. Operand has 676 places, 763 transitions, 2051 flow [2022-11-02 20:44:59,689 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 676 places, 763 transitions, 2051 flow [2022-11-02 20:44:59,690 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:44:59,690 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;@4e0ca16a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:44:59,690 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:44:59,696 INFO L130 PetriNetUnfolder]: 3/75 cut-off events. [2022-11-02 20:44:59,696 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:44:59,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:44:59,697 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] [2022-11-02 20:44:59,697 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:44:59,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:59,697 INFO L85 PathProgramCache]: Analyzing trace with hash -997770527, now seen corresponding path program 1 times [2022-11-02 20:44:59,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:59,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717979986] [2022-11-02 20:44:59,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:59,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:59,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:59,711 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 20:44:59,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:59,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717979986] [2022-11-02 20:44:59,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717979986] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:44:59,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:44:59,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:44:59,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772973236] [2022-11-02 20:44:59,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:59,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:44:59,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:59,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:44:59,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:44:59,714 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 611 out of 763 [2022-11-02 20:44:59,715 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 676 places, 763 transitions, 2051 flow. Second operand has 2 states, 2 states have (on average 611.5) internal successors, (1223), 2 states have internal predecessors, (1223), 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 20:44:59,715 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:44:59,715 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 611 of 763 [2022-11-02 20:44:59,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:45:00,317 INFO L130 PetriNetUnfolder]: 0/1278 cut-off events. [2022-11-02 20:45:00,317 INFO L131 PetriNetUnfolder]: For 1981/1981 co-relation queries the response was YES. [2022-11-02 20:45:00,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1595 conditions, 1278 events. 0/1278 cut-off events. For 1981/1981 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 5176 event pairs, 0 based on Foata normal form. 1356/2590 useless extension candidates. Maximal degree in co-relation 0. Up to 22 conditions per place. [2022-11-02 20:45:00,319 INFO L137 encePairwiseOnDemand]: 633/763 looper letters, 21 selfloop transitions, 0 changer transitions 11/632 dead transitions. [2022-11-02 20:45:00,319 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 676 places, 632 transitions, 1831 flow [2022-11-02 20:45:00,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:45:00,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:45:00,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1373 transitions. [2022-11-02 20:45:00,320 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8997378768020969 [2022-11-02 20:45:00,321 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1373 transitions. [2022-11-02 20:45:00,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1373 transitions. [2022-11-02 20:45:00,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:45:00,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1373 transitions. [2022-11-02 20:45:00,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 686.5) internal successors, (1373), 2 states have internal predecessors, (1373), 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 20:45:00,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 763.0) internal successors, (2289), 3 states have internal predecessors, (2289), 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 20:45:00,323 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 763.0) internal successors, (2289), 3 states have internal predecessors, (2289), 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 20:45:00,323 INFO L175 Difference]: Start difference. First operand has 676 places, 763 transitions, 2051 flow. Second operand 2 states and 1373 transitions. [2022-11-02 20:45:00,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 676 places, 632 transitions, 1831 flow [2022-11-02 20:45:00,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 676 places, 632 transitions, 1411 flow, removed 210 selfloop flow, removed 0 redundant places. [2022-11-02 20:45:00,332 INFO L231 Difference]: Finished difference. Result has 676 places, 621 transitions, 1347 flow [2022-11-02 20:45:00,332 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=763, PETRI_DIFFERENCE_MINUEND_FLOW=1369, PETRI_DIFFERENCE_MINUEND_PLACES=675, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=632, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1347, PETRI_PLACES=676, PETRI_TRANSITIONS=621} [2022-11-02 20:45:00,332 INFO L287 CegarLoopForPetriNet]: 676 programPoint places, 0 predicate places. [2022-11-02 20:45:00,332 INFO L495 AbstractCegarLoop]: Abstraction has has 676 places, 621 transitions, 1347 flow [2022-11-02 20:45:00,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 611.5) internal successors, (1223), 2 states have internal predecessors, (1223), 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 20:45:00,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:00,333 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] [2022-11-02 20:45:00,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-11-02 20:45:00,333 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:45:00,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:00,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1500245410, now seen corresponding path program 1 times [2022-11-02 20:45:00,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:00,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962987797] [2022-11-02 20:45:00,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:00,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:00,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:00,359 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 20:45:00,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:00,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962987797] [2022-11-02 20:45:00,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962987797] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:45:00,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:45:00,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:45:00,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29290618] [2022-11-02 20:45:00,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:45:00,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:45:00,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:00,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:45:00,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:45:00,362 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 604 out of 763 [2022-11-02 20:45:00,363 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 676 places, 621 transitions, 1347 flow. Second operand has 3 states, 3 states have (on average 605.0) internal successors, (1815), 3 states have internal predecessors, (1815), 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 20:45:00,363 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:45:00,363 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 604 of 763 [2022-11-02 20:45:00,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:45:01,029 INFO L130 PetriNetUnfolder]: 0/1025 cut-off events. [2022-11-02 20:45:01,029 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-11-02 20:45:01,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1242 conditions, 1025 events. 0/1025 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3449 event pairs, 0 based on Foata normal form. 0/1004 useless extension candidates. Maximal degree in co-relation 0. Up to 126 conditions per place. [2022-11-02 20:45:01,031 INFO L137 encePairwiseOnDemand]: 760/763 looper letters, 30 selfloop transitions, 2 changer transitions 0/625 dead transitions. [2022-11-02 20:45:01,031 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 667 places, 625 transitions, 1419 flow [2022-11-02 20:45:01,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:45:01,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:45:01,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1845 transitions. [2022-11-02 20:45:01,034 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8060288335517694 [2022-11-02 20:45:01,034 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1845 transitions. [2022-11-02 20:45:01,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1845 transitions. [2022-11-02 20:45:01,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:45:01,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1845 transitions. [2022-11-02 20:45:01,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 615.0) internal successors, (1845), 3 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:45:01,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 763.0) internal successors, (3052), 4 states have internal predecessors, (3052), 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 20:45:01,037 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 763.0) internal successors, (3052), 4 states have internal predecessors, (3052), 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 20:45:01,037 INFO L175 Difference]: Start difference. First operand has 676 places, 621 transitions, 1347 flow. Second operand 3 states and 1845 transitions. [2022-11-02 20:45:01,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 667 places, 625 transitions, 1419 flow [2022-11-02 20:45:01,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 667 places, 625 transitions, 1419 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:45:01,044 INFO L231 Difference]: Finished difference. Result has 668 places, 622 transitions, 1359 flow [2022-11-02 20:45:01,045 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=763, PETRI_DIFFERENCE_MINUEND_FLOW=1347, PETRI_DIFFERENCE_MINUEND_PLACES=665, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1359, PETRI_PLACES=668, PETRI_TRANSITIONS=622} [2022-11-02 20:45:01,045 INFO L287 CegarLoopForPetriNet]: 676 programPoint places, -8 predicate places. [2022-11-02 20:45:01,045 INFO L495 AbstractCegarLoop]: Abstraction has has 668 places, 622 transitions, 1359 flow [2022-11-02 20:45:01,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 605.0) internal successors, (1815), 3 states have internal predecessors, (1815), 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 20:45:01,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:01,045 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] [2022-11-02 20:45:01,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-11-02 20:45:01,046 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:45:01,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:01,046 INFO L85 PathProgramCache]: Analyzing trace with hash -102751914, now seen corresponding path program 1 times [2022-11-02 20:45:01,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:01,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516913152] [2022-11-02 20:45:01,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:01,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:01,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:01,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:01,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:01,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516913152] [2022-11-02 20:45:01,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516913152] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:45:01,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886556057] [2022-11-02 20:45:01,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:01,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:01,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:01,085 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:45:01,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-11-02 20:45:01,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:01,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:45:01,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:45:01,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:01,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:45:01,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:01,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886556057] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:45:01,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:45:01,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:45:01,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149988789] [2022-11-02 20:45:01,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:45:01,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:45:01,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:01,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:45:01,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:45:01,623 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 603 out of 763 [2022-11-02 20:45:01,625 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 668 places, 622 transitions, 1359 flow. Second operand has 10 states, 10 states have (on average 605.3) internal successors, (6053), 10 states have internal predecessors, (6053), 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 20:45:01,625 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:45:01,625 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 603 of 763 [2022-11-02 20:45:01,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:45:02,239 INFO L130 PetriNetUnfolder]: 0/1003 cut-off events. [2022-11-02 20:45:02,239 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-11-02 20:45:02,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1283 conditions, 1003 events. 0/1003 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3319 event pairs, 0 based on Foata normal form. 2/1005 useless extension candidates. Maximal degree in co-relation 0. Up to 79 conditions per place. [2022-11-02 20:45:02,240 INFO L137 encePairwiseOnDemand]: 757/763 looper letters, 31 selfloop transitions, 9 changer transitions 0/632 dead transitions. [2022-11-02 20:45:02,240 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 676 places, 632 transitions, 1461 flow [2022-11-02 20:45:02,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:45:02,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:45:02,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 5469 transitions. [2022-11-02 20:45:02,244 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7964176496286588 [2022-11-02 20:45:02,244 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 5469 transitions. [2022-11-02 20:45:02,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 5469 transitions. [2022-11-02 20:45:02,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:45:02,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 5469 transitions. [2022-11-02 20:45:02,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 607.6666666666666) internal successors, (5469), 9 states have internal predecessors, (5469), 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 20:45:02,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 763.0) internal successors, (7630), 10 states have internal predecessors, (7630), 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 20:45:02,252 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 763.0) internal successors, (7630), 10 states have internal predecessors, (7630), 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 20:45:02,253 INFO L175 Difference]: Start difference. First operand has 668 places, 622 transitions, 1359 flow. Second operand 9 states and 5469 transitions. [2022-11-02 20:45:02,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 676 places, 632 transitions, 1461 flow [2022-11-02 20:45:02,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 675 places, 632 transitions, 1459 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:45:02,259 INFO L231 Difference]: Finished difference. Result has 678 places, 628 transitions, 1407 flow [2022-11-02 20:45:02,259 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=763, PETRI_DIFFERENCE_MINUEND_FLOW=1357, PETRI_DIFFERENCE_MINUEND_PLACES=667, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=616, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1407, PETRI_PLACES=678, PETRI_TRANSITIONS=628} [2022-11-02 20:45:02,260 INFO L287 CegarLoopForPetriNet]: 676 programPoint places, 2 predicate places. [2022-11-02 20:45:02,260 INFO L495 AbstractCegarLoop]: Abstraction has has 678 places, 628 transitions, 1407 flow [2022-11-02 20:45:02,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 605.3) internal successors, (6053), 10 states have internal predecessors, (6053), 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 20:45:02,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:02,261 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:45:02,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-11-02 20:45:02,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-11-02 20:45:02,462 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:45:02,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:02,462 INFO L85 PathProgramCache]: Analyzing trace with hash -414424447, now seen corresponding path program 1 times [2022-11-02 20:45:02,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:02,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056440941] [2022-11-02 20:45:02,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:02,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:02,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:02,533 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:02,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:02,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056440941] [2022-11-02 20:45:02,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056440941] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:45:02,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855721171] [2022-11-02 20:45:02,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:02,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:02,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:02,534 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:45:02,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-11-02 20:45:03,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:03,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:45:03,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:45:03,068 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:03,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:45:03,158 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:03,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855721171] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:45:03,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:45:03,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:45:03,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492162685] [2022-11-02 20:45:03,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:45:03,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:45:03,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:03,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:45:03,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:45:03,166 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 603 out of 763 [2022-11-02 20:45:03,170 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 678 places, 628 transitions, 1407 flow. Second operand has 18 states, 18 states have (on average 605.6111111111111) internal successors, (10901), 18 states have internal predecessors, (10901), 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 20:45:03,170 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:45:03,170 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 603 of 763 [2022-11-02 20:45:03,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:45:03,957 INFO L130 PetriNetUnfolder]: 0/959 cut-off events. [2022-11-02 20:45:03,957 INFO L131 PetriNetUnfolder]: For 120/120 co-relation queries the response was YES. [2022-11-02 20:45:03,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1388 conditions, 959 events. 0/959 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3013 event pairs, 0 based on Foata normal form. 4/963 useless extension candidates. Maximal degree in co-relation 0. Up to 63 conditions per place. [2022-11-02 20:45:03,959 INFO L137 encePairwiseOnDemand]: 757/763 looper letters, 39 selfloop transitions, 21 changer transitions 0/652 dead transitions. [2022-11-02 20:45:03,959 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 698 places, 652 transitions, 1635 flow [2022-11-02 20:45:03,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:45:03,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:45:03,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 12727 transitions. [2022-11-02 20:45:03,967 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7942956999313486 [2022-11-02 20:45:03,967 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 12727 transitions. [2022-11-02 20:45:03,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 12727 transitions. [2022-11-02 20:45:03,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:45:03,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 12727 transitions. [2022-11-02 20:45:03,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 606.047619047619) internal successors, (12727), 21 states have internal predecessors, (12727), 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 20:45:03,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 763.0) internal successors, (16786), 22 states have internal predecessors, (16786), 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 20:45:03,986 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 763.0) internal successors, (16786), 22 states have internal predecessors, (16786), 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 20:45:03,986 INFO L175 Difference]: Start difference. First operand has 678 places, 628 transitions, 1407 flow. Second operand 21 states and 12727 transitions. [2022-11-02 20:45:03,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 698 places, 652 transitions, 1635 flow [2022-11-02 20:45:03,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 697 places, 652 transitions, 1621 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:45:03,995 INFO L231 Difference]: Finished difference. Result has 702 places, 641 transitions, 1531 flow [2022-11-02 20:45:03,995 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=763, PETRI_DIFFERENCE_MINUEND_FLOW=1401, PETRI_DIFFERENCE_MINUEND_PLACES=677, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=617, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1531, PETRI_PLACES=702, PETRI_TRANSITIONS=641} [2022-11-02 20:45:03,996 INFO L287 CegarLoopForPetriNet]: 676 programPoint places, 26 predicate places. [2022-11-02 20:45:03,996 INFO L495 AbstractCegarLoop]: Abstraction has has 702 places, 641 transitions, 1531 flow [2022-11-02 20:45:03,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 605.6111111111111) internal successors, (10901), 18 states have internal predecessors, (10901), 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 20:45:03,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:03,997 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:45:04,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-11-02 20:45:04,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-11-02 20:45:04,201 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:45:04,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:04,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1882032355, now seen corresponding path program 1 times [2022-11-02 20:45:04,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:04,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444301181] [2022-11-02 20:45:04,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:04,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:04,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:04,385 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:04,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:04,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444301181] [2022-11-02 20:45:04,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444301181] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:45:04,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301237370] [2022-11-02 20:45:04,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:04,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:04,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:04,387 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:45:04,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-11-02 20:45:04,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:04,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:45:04,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:45:04,983 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:04,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:45:05,278 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:05,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301237370] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:45:05,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:45:05,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-02 20:45:05,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815724778] [2022-11-02 20:45:05,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:45:05,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:45:05,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:05,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:45:05,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:45:05,289 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 603 out of 763 [2022-11-02 20:45:05,295 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 702 places, 641 transitions, 1531 flow. Second operand has 34 states, 34 states have (on average 605.7941176470588) internal successors, (20597), 34 states have internal predecessors, (20597), 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 20:45:05,295 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:45:05,295 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 603 of 763 [2022-11-02 20:45:05,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:45:06,435 INFO L130 PetriNetUnfolder]: 0/871 cut-off events. [2022-11-02 20:45:06,435 INFO L131 PetriNetUnfolder]: For 438/438 co-relation queries the response was YES. [2022-11-02 20:45:06,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1397 conditions, 871 events. 0/871 cut-off events. For 438/438 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2445 event pairs, 0 based on Foata normal form. 8/879 useless extension candidates. Maximal degree in co-relation 0. Up to 39 conditions per place. [2022-11-02 20:45:06,438 INFO L137 encePairwiseOnDemand]: 757/763 looper letters, 55 selfloop transitions, 45 changer transitions 0/692 dead transitions. [2022-11-02 20:45:06,438 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 746 places, 692 transitions, 2047 flow [2022-11-02 20:45:06,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-02 20:45:06,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-02 20:45:06,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 27243 transitions. [2022-11-02 20:45:06,452 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7934469200524247 [2022-11-02 20:45:06,452 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 27243 transitions. [2022-11-02 20:45:06,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 27243 transitions. [2022-11-02 20:45:06,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:45:06,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 27243 transitions. [2022-11-02 20:45:06,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 605.4) internal successors, (27243), 45 states have internal predecessors, (27243), 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 20:45:06,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 763.0) internal successors, (35098), 46 states have internal predecessors, (35098), 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 20:45:06,493 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 763.0) internal successors, (35098), 46 states have internal predecessors, (35098), 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 20:45:06,494 INFO L175 Difference]: Start difference. First operand has 702 places, 641 transitions, 1531 flow. Second operand 45 states and 27243 transitions. [2022-11-02 20:45:06,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 746 places, 692 transitions, 2047 flow [2022-11-02 20:45:06,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 740 places, 692 transitions, 2007 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-02 20:45:06,509 INFO L231 Difference]: Finished difference. Result has 749 places, 666 transitions, 1809 flow [2022-11-02 20:45:06,509 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=763, PETRI_DIFFERENCE_MINUEND_FLOW=1507, PETRI_DIFFERENCE_MINUEND_PLACES=696, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=618, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1809, PETRI_PLACES=749, PETRI_TRANSITIONS=666} [2022-11-02 20:45:06,510 INFO L287 CegarLoopForPetriNet]: 676 programPoint places, 73 predicate places. [2022-11-02 20:45:06,510 INFO L495 AbstractCegarLoop]: Abstraction has has 749 places, 666 transitions, 1809 flow [2022-11-02 20:45:06,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 605.7941176470588) internal successors, (20597), 34 states have internal predecessors, (20597), 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 20:45:06,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:06,513 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:45:06,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-11-02 20:45:06,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:06,715 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:45:06,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:06,715 INFO L85 PathProgramCache]: Analyzing trace with hash -882061865, now seen corresponding path program 1 times [2022-11-02 20:45:06,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:06,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535031614] [2022-11-02 20:45:06,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:06,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:06,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:07,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:07,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:07,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535031614] [2022-11-02 20:45:07,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535031614] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:45:07,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871704627] [2022-11-02 20:45:07,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:07,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:07,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:07,539 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:45:07,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-11-02 20:45:08,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:08,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 20:45:08,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:45:08,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:08,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:45:09,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:09,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871704627] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:45:09,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:45:09,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-02 20:45:09,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181069014] [2022-11-02 20:45:09,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:45:09,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-02 20:45:09,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:09,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-02 20:45:09,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-02 20:45:09,417 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 603 out of 763 [2022-11-02 20:45:09,429 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 749 places, 666 transitions, 1809 flow. Second operand has 66 states, 66 states have (on average 605.8939393939394) internal successors, (39989), 66 states have internal predecessors, (39989), 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 20:45:09,430 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:45:09,430 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 603 of 763 [2022-11-02 20:45:09,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:45:11,186 INFO L130 PetriNetUnfolder]: 0/794 cut-off events. [2022-11-02 20:45:11,187 INFO L131 PetriNetUnfolder]: For 1014/1014 co-relation queries the response was YES. [2022-11-02 20:45:11,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1348 conditions, 794 events. 0/794 cut-off events. For 1014/1014 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1953 event pairs, 0 based on Foata normal form. 7/801 useless extension candidates. Maximal degree in co-relation 0. Up to 38 conditions per place. [2022-11-02 20:45:11,188 INFO L137 encePairwiseOnDemand]: 758/763 looper letters, 66 selfloop transitions, 64 changer transitions 0/712 dead transitions. [2022-11-02 20:45:11,188 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 803 places, 712 transitions, 2427 flow [2022-11-02 20:45:11,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-02 20:45:11,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2022-11-02 20:45:11,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 39935 transitions. [2022-11-02 20:45:11,219 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7930219627467334 [2022-11-02 20:45:11,219 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 39935 transitions. [2022-11-02 20:45:11,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 39935 transitions. [2022-11-02 20:45:11,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:45:11,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 39935 transitions. [2022-11-02 20:45:11,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 605.0757575757576) internal successors, (39935), 66 states have internal predecessors, (39935), 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 20:45:11,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 763.0) internal successors, (51121), 67 states have internal predecessors, (51121), 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 20:45:11,300 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 763.0) internal successors, (51121), 67 states have internal predecessors, (51121), 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 20:45:11,300 INFO L175 Difference]: Start difference. First operand has 749 places, 666 transitions, 1809 flow. Second operand 66 states and 39935 transitions. [2022-11-02 20:45:11,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 803 places, 712 transitions, 2427 flow [2022-11-02 20:45:11,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 770 places, 712 transitions, 2250 flow, removed 16 selfloop flow, removed 33 redundant places. [2022-11-02 20:45:11,310 INFO L231 Difference]: Finished difference. Result has 770 places, 673 transitions, 1911 flow [2022-11-02 20:45:11,311 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=763, PETRI_DIFFERENCE_MINUEND_FLOW=1645, PETRI_DIFFERENCE_MINUEND_PLACES=705, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=1911, PETRI_PLACES=770, PETRI_TRANSITIONS=673} [2022-11-02 20:45:11,311 INFO L287 CegarLoopForPetriNet]: 676 programPoint places, 94 predicate places. [2022-11-02 20:45:11,311 INFO L495 AbstractCegarLoop]: Abstraction has has 770 places, 673 transitions, 1911 flow [2022-11-02 20:45:11,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 605.8939393939394) internal successors, (39989), 66 states have internal predecessors, (39989), 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 20:45:11,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:11,316 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 22, 22, 22, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:45:11,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-11-02 20:45:11,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:11,517 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:45:11,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:11,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1428775408, now seen corresponding path program 1 times [2022-11-02 20:45:11,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:11,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340624652] [2022-11-02 20:45:11,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:11,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:11,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:45:11,551 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:45:11,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:45:11,621 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:45:11,622 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:45:11,622 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:45:11,622 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:45:11,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-11-02 20:45:11,623 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:45:11,623 WARN L233 ceAbstractionStarter]: 21 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:45:11,623 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 22 thread instances. [2022-11-02 20:45:11,692 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:45:11,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 705 places, 796 transitions, 2164 flow [2022-11-02 20:45:12,617 INFO L130 PetriNetUnfolder]: 224/1583 cut-off events. [2022-11-02 20:45:12,617 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2022-11-02 20:45:12,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1903 conditions, 1583 events. 224/1583 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 5776 event pairs, 0 based on Foata normal form. 0/1313 useless extension candidates. Maximal degree in co-relation 1781. Up to 46 conditions per place. [2022-11-02 20:45:12,730 INFO L82 GeneralOperation]: Start removeDead. Operand has 705 places, 796 transitions, 2164 flow [2022-11-02 20:45:12,776 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 705 places, 796 transitions, 2164 flow [2022-11-02 20:45:12,777 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:45:12,777 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;@4e0ca16a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:45:12,777 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:45:12,783 INFO L130 PetriNetUnfolder]: 2/72 cut-off events. [2022-11-02 20:45:12,783 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:45:12,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:12,784 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] [2022-11-02 20:45:12,784 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:45:12,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:12,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1742755871, now seen corresponding path program 1 times [2022-11-02 20:45:12,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:12,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353548589] [2022-11-02 20:45:12,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:12,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:12,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:12,805 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 20:45:12,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:12,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353548589] [2022-11-02 20:45:12,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353548589] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:45:12,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:45:12,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:45:12,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804276340] [2022-11-02 20:45:12,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:45:12,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:45:12,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:12,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:45:12,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:45:12,809 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 637 out of 796 [2022-11-02 20:45:12,810 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 705 places, 796 transitions, 2164 flow. Second operand has 2 states, 2 states have (on average 637.5) internal successors, (1275), 2 states have internal predecessors, (1275), 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 20:45:12,810 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:45:12,810 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 637 of 796 [2022-11-02 20:45:12,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:45:13,485 INFO L130 PetriNetUnfolder]: 0/1336 cut-off events. [2022-11-02 20:45:13,486 INFO L131 PetriNetUnfolder]: For 2255/2255 co-relation queries the response was YES. [2022-11-02 20:45:13,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1679 conditions, 1336 events. 0/1336 cut-off events. For 2255/2255 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 5425 event pairs, 0 based on Foata normal form. 1486/2776 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2022-11-02 20:45:13,488 INFO L137 encePairwiseOnDemand]: 660/796 looper letters, 22 selfloop transitions, 0 changer transitions 11/659 dead transitions. [2022-11-02 20:45:13,488 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 705 places, 659 transitions, 1934 flow [2022-11-02 20:45:13,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:45:13,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:45:13,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1432 transitions. [2022-11-02 20:45:13,489 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8994974874371859 [2022-11-02 20:45:13,489 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1432 transitions. [2022-11-02 20:45:13,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1432 transitions. [2022-11-02 20:45:13,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:45:13,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1432 transitions. [2022-11-02 20:45:13,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 716.0) internal successors, (1432), 2 states have internal predecessors, (1432), 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 20:45:13,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 796.0) internal successors, (2388), 3 states have internal predecessors, (2388), 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 20:45:13,492 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 796.0) internal successors, (2388), 3 states have internal predecessors, (2388), 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 20:45:13,492 INFO L175 Difference]: Start difference. First operand has 705 places, 796 transitions, 2164 flow. Second operand 2 states and 1432 transitions. [2022-11-02 20:45:13,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 705 places, 659 transitions, 1934 flow [2022-11-02 20:45:13,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 705 places, 659 transitions, 1472 flow, removed 231 selfloop flow, removed 0 redundant places. [2022-11-02 20:45:13,500 INFO L231 Difference]: Finished difference. Result has 705 places, 648 transitions, 1406 flow [2022-11-02 20:45:13,501 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=1428, PETRI_DIFFERENCE_MINUEND_PLACES=704, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=659, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1406, PETRI_PLACES=705, PETRI_TRANSITIONS=648} [2022-11-02 20:45:13,501 INFO L287 CegarLoopForPetriNet]: 705 programPoint places, 0 predicate places. [2022-11-02 20:45:13,501 INFO L495 AbstractCegarLoop]: Abstraction has has 705 places, 648 transitions, 1406 flow [2022-11-02 20:45:13,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 637.5) internal successors, (1275), 2 states have internal predecessors, (1275), 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 20:45:13,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:13,501 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] [2022-11-02 20:45:13,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-11-02 20:45:13,502 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:45:13,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:13,502 INFO L85 PathProgramCache]: Analyzing trace with hash 755260066, now seen corresponding path program 1 times [2022-11-02 20:45:13,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:13,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379681219] [2022-11-02 20:45:13,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:13,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:13,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:13,521 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 20:45:13,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:13,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379681219] [2022-11-02 20:45:13,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379681219] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:45:13,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:45:13,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:45:13,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100359606] [2022-11-02 20:45:13,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:45:13,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:45:13,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:13,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:45:13,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:45:13,524 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 630 out of 796 [2022-11-02 20:45:13,525 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 705 places, 648 transitions, 1406 flow. Second operand has 3 states, 3 states have (on average 631.0) internal successors, (1893), 3 states have internal predecessors, (1893), 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 20:45:13,526 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:45:13,526 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 630 of 796 [2022-11-02 20:45:13,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:45:14,069 INFO L130 PetriNetUnfolder]: 0/1072 cut-off events. [2022-11-02 20:45:14,070 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-11-02 20:45:14,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1299 conditions, 1072 events. 0/1072 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3602 event pairs, 0 based on Foata normal form. 0/1050 useless extension candidates. Maximal degree in co-relation 0. Up to 132 conditions per place. [2022-11-02 20:45:14,072 INFO L137 encePairwiseOnDemand]: 793/796 looper letters, 31 selfloop transitions, 2 changer transitions 0/652 dead transitions. [2022-11-02 20:45:14,072 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 696 places, 652 transitions, 1480 flow [2022-11-02 20:45:14,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:45:14,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:45:14,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1924 transitions. [2022-11-02 20:45:14,074 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8056951423785594 [2022-11-02 20:45:14,074 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1924 transitions. [2022-11-02 20:45:14,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1924 transitions. [2022-11-02 20:45:14,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:45:14,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1924 transitions. [2022-11-02 20:45:14,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 641.3333333333334) internal successors, (1924), 3 states have internal predecessors, (1924), 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 20:45:14,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 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 20:45:14,078 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 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 20:45:14,078 INFO L175 Difference]: Start difference. First operand has 705 places, 648 transitions, 1406 flow. Second operand 3 states and 1924 transitions. [2022-11-02 20:45:14,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 696 places, 652 transitions, 1480 flow [2022-11-02 20:45:14,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 696 places, 652 transitions, 1480 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:45:14,086 INFO L231 Difference]: Finished difference. Result has 697 places, 649 transitions, 1418 flow [2022-11-02 20:45:14,086 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=1406, PETRI_DIFFERENCE_MINUEND_PLACES=694, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=646, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1418, PETRI_PLACES=697, PETRI_TRANSITIONS=649} [2022-11-02 20:45:14,086 INFO L287 CegarLoopForPetriNet]: 705 programPoint places, -8 predicate places. [2022-11-02 20:45:14,087 INFO L495 AbstractCegarLoop]: Abstraction has has 697 places, 649 transitions, 1418 flow [2022-11-02 20:45:14,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 631.0) internal successors, (1893), 3 states have internal predecessors, (1893), 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 20:45:14,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:14,087 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] [2022-11-02 20:45:14,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-11-02 20:45:14,087 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:45:14,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:14,088 INFO L85 PathProgramCache]: Analyzing trace with hash 898973686, now seen corresponding path program 1 times [2022-11-02 20:45:14,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:14,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691716840] [2022-11-02 20:45:14,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:14,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:14,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:14,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:14,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:14,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691716840] [2022-11-02 20:45:14,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691716840] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:45:14,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875592494] [2022-11-02 20:45:14,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:14,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:14,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:14,129 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:45:14,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-11-02 20:45:14,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:14,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:45:14,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:45:14,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:14,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:45:14,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:14,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875592494] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:45:14,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:45:14,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:45:14,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60203719] [2022-11-02 20:45:14,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:45:14,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:45:14,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:14,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:45:14,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:45:14,696 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 629 out of 796 [2022-11-02 20:45:14,698 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 697 places, 649 transitions, 1418 flow. Second operand has 10 states, 10 states have (on average 631.3) internal successors, (6313), 10 states have internal predecessors, (6313), 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 20:45:14,698 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:45:14,699 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 629 of 796 [2022-11-02 20:45:14,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:45:15,337 INFO L130 PetriNetUnfolder]: 0/1050 cut-off events. [2022-11-02 20:45:15,337 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-11-02 20:45:15,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1343 conditions, 1050 events. 0/1050 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3472 event pairs, 0 based on Foata normal form. 2/1052 useless extension candidates. Maximal degree in co-relation 0. Up to 83 conditions per place. [2022-11-02 20:45:15,339 INFO L137 encePairwiseOnDemand]: 790/796 looper letters, 32 selfloop transitions, 9 changer transitions 0/659 dead transitions. [2022-11-02 20:45:15,339 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 705 places, 659 transitions, 1522 flow [2022-11-02 20:45:15,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:45:15,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:45:15,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 5704 transitions. [2022-11-02 20:45:15,343 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7962032384142937 [2022-11-02 20:45:15,343 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 5704 transitions. [2022-11-02 20:45:15,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 5704 transitions. [2022-11-02 20:45:15,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:45:15,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 5704 transitions. [2022-11-02 20:45:15,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 633.7777777777778) internal successors, (5704), 9 states have internal predecessors, (5704), 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 20:45:15,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 796.0) internal successors, (7960), 10 states have internal predecessors, (7960), 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 20:45:15,351 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 796.0) internal successors, (7960), 10 states have internal predecessors, (7960), 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 20:45:15,352 INFO L175 Difference]: Start difference. First operand has 697 places, 649 transitions, 1418 flow. Second operand 9 states and 5704 transitions. [2022-11-02 20:45:15,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 705 places, 659 transitions, 1522 flow [2022-11-02 20:45:15,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 704 places, 659 transitions, 1520 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:45:15,359 INFO L231 Difference]: Finished difference. Result has 707 places, 655 transitions, 1466 flow [2022-11-02 20:45:15,359 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=1416, PETRI_DIFFERENCE_MINUEND_PLACES=696, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=643, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1466, PETRI_PLACES=707, PETRI_TRANSITIONS=655} [2022-11-02 20:45:15,360 INFO L287 CegarLoopForPetriNet]: 705 programPoint places, 2 predicate places. [2022-11-02 20:45:15,360 INFO L495 AbstractCegarLoop]: Abstraction has has 707 places, 655 transitions, 1466 flow [2022-11-02 20:45:15,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 631.3) internal successors, (6313), 10 states have internal predecessors, (6313), 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 20:45:15,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:15,361 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:45:15,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-11-02 20:45:15,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-11-02 20:45:15,561 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:45:15,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:15,562 INFO L85 PathProgramCache]: Analyzing trace with hash 706235489, now seen corresponding path program 1 times [2022-11-02 20:45:15,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:15,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995477975] [2022-11-02 20:45:15,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:15,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:15,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:15,636 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:15,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:15,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995477975] [2022-11-02 20:45:15,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995477975] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:45:15,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493953069] [2022-11-02 20:45:15,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:15,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:15,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:15,638 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:45:15,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-11-02 20:45:16,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:16,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:45:16,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:45:16,205 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:16,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:45:16,295 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:16,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493953069] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:45:16,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:45:16,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:45:16,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912563948] [2022-11-02 20:45:16,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:45:16,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:45:16,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:16,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:45:16,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:45:16,302 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 629 out of 796 [2022-11-02 20:45:16,306 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 707 places, 655 transitions, 1466 flow. Second operand has 18 states, 18 states have (on average 631.6111111111111) internal successors, (11369), 18 states have internal predecessors, (11369), 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 20:45:16,306 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:45:16,306 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 629 of 796 [2022-11-02 20:45:16,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:45:17,148 INFO L130 PetriNetUnfolder]: 0/1006 cut-off events. [2022-11-02 20:45:17,149 INFO L131 PetriNetUnfolder]: For 126/126 co-relation queries the response was YES. [2022-11-02 20:45:17,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1456 conditions, 1006 events. 0/1006 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3200 event pairs, 0 based on Foata normal form. 4/1010 useless extension candidates. Maximal degree in co-relation 0. Up to 67 conditions per place. [2022-11-02 20:45:17,150 INFO L137 encePairwiseOnDemand]: 790/796 looper letters, 40 selfloop transitions, 21 changer transitions 0/679 dead transitions. [2022-11-02 20:45:17,151 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 727 places, 679 transitions, 1696 flow [2022-11-02 20:45:17,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:45:17,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:45:17,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 13274 transitions. [2022-11-02 20:45:17,159 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7940894950945202 [2022-11-02 20:45:17,159 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 13274 transitions. [2022-11-02 20:45:17,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 13274 transitions. [2022-11-02 20:45:17,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:45:17,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 13274 transitions. [2022-11-02 20:45:17,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 632.0952380952381) internal successors, (13274), 21 states have internal predecessors, (13274), 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 20:45:17,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 796.0) internal successors, (17512), 22 states have internal predecessors, (17512), 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 20:45:17,178 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 796.0) internal successors, (17512), 22 states have internal predecessors, (17512), 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 20:45:17,178 INFO L175 Difference]: Start difference. First operand has 707 places, 655 transitions, 1466 flow. Second operand 21 states and 13274 transitions. [2022-11-02 20:45:17,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 727 places, 679 transitions, 1696 flow [2022-11-02 20:45:17,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 726 places, 679 transitions, 1682 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:45:17,186 INFO L231 Difference]: Finished difference. Result has 731 places, 668 transitions, 1590 flow [2022-11-02 20:45:17,186 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=1460, PETRI_DIFFERENCE_MINUEND_PLACES=706, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=644, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1590, PETRI_PLACES=731, PETRI_TRANSITIONS=668} [2022-11-02 20:45:17,187 INFO L287 CegarLoopForPetriNet]: 705 programPoint places, 26 predicate places. [2022-11-02 20:45:17,187 INFO L495 AbstractCegarLoop]: Abstraction has has 731 places, 668 transitions, 1590 flow [2022-11-02 20:45:17,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 631.6111111111111) internal successors, (11369), 18 states have internal predecessors, (11369), 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 20:45:17,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:17,189 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:45:17,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-11-02 20:45:17,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-11-02 20:45:17,394 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:45:17,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:17,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1489721021, now seen corresponding path program 1 times [2022-11-02 20:45:17,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:17,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787660067] [2022-11-02 20:45:17,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:17,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:17,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:17,582 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:17,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:17,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787660067] [2022-11-02 20:45:17,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787660067] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:45:17,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52419605] [2022-11-02 20:45:17,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:17,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:17,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:17,585 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:45:17,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-11-02 20:45:18,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:18,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:45:18,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:45:18,242 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:18,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:45:18,525 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:18,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52419605] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:45:18,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:45:18,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-02 20:45:18,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605989545] [2022-11-02 20:45:18,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:45:18,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:45:18,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:18,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:45:18,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:45:18,538 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 629 out of 796 [2022-11-02 20:45:18,545 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 731 places, 668 transitions, 1590 flow. Second operand has 34 states, 34 states have (on average 631.7941176470588) internal successors, (21481), 34 states have internal predecessors, (21481), 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 20:45:18,545 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:45:18,545 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 629 of 796 [2022-11-02 20:45:18,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:45:19,697 INFO L130 PetriNetUnfolder]: 0/918 cut-off events. [2022-11-02 20:45:19,697 INFO L131 PetriNetUnfolder]: For 465/465 co-relation queries the response was YES. [2022-11-02 20:45:19,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1474 conditions, 918 events. 0/918 cut-off events. For 465/465 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2606 event pairs, 0 based on Foata normal form. 8/926 useless extension candidates. Maximal degree in co-relation 0. Up to 41 conditions per place. [2022-11-02 20:45:19,700 INFO L137 encePairwiseOnDemand]: 790/796 looper letters, 56 selfloop transitions, 45 changer transitions 0/719 dead transitions. [2022-11-02 20:45:19,700 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 775 places, 719 transitions, 2108 flow [2022-11-02 20:45:19,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-02 20:45:19,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-02 20:45:19,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 28414 transitions. [2022-11-02 20:45:19,714 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7932439977666108 [2022-11-02 20:45:19,714 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 28414 transitions. [2022-11-02 20:45:19,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 28414 transitions. [2022-11-02 20:45:19,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:45:19,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 28414 transitions. [2022-11-02 20:45:19,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 631.4222222222222) internal successors, (28414), 45 states have internal predecessors, (28414), 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 20:45:19,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 796.0) internal successors, (36616), 46 states have internal predecessors, (36616), 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 20:45:19,754 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 796.0) internal successors, (36616), 46 states have internal predecessors, (36616), 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 20:45:19,754 INFO L175 Difference]: Start difference. First operand has 731 places, 668 transitions, 1590 flow. Second operand 45 states and 28414 transitions. [2022-11-02 20:45:19,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 775 places, 719 transitions, 2108 flow [2022-11-02 20:45:19,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 769 places, 719 transitions, 2068 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-02 20:45:19,763 INFO L231 Difference]: Finished difference. Result has 778 places, 693 transitions, 1868 flow [2022-11-02 20:45:19,764 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=1566, PETRI_DIFFERENCE_MINUEND_PLACES=725, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=645, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1868, PETRI_PLACES=778, PETRI_TRANSITIONS=693} [2022-11-02 20:45:19,764 INFO L287 CegarLoopForPetriNet]: 705 programPoint places, 73 predicate places. [2022-11-02 20:45:19,764 INFO L495 AbstractCegarLoop]: Abstraction has has 778 places, 693 transitions, 1868 flow [2022-11-02 20:45:19,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 631.7941176470588) internal successors, (21481), 34 states have internal predecessors, (21481), 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 20:45:19,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:19,767 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:45:19,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-11-02 20:45:19,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2022-11-02 20:45:19,967 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:45:19,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:19,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1813980361, now seen corresponding path program 1 times [2022-11-02 20:45:19,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:19,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746587843] [2022-11-02 20:45:19,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:19,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:19,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:20,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:20,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:20,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746587843] [2022-11-02 20:45:20,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746587843] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:45:20,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410335757] [2022-11-02 20:45:20,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:20,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:20,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:20,607 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:45:20,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-11-02 20:45:21,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:21,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 20:45:21,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:45:21,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:21,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:45:22,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:22,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410335757] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:45:22,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:45:22,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-02 20:45:22,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416028985] [2022-11-02 20:45:22,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:45:22,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-02 20:45:22,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:22,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-02 20:45:22,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-02 20:45:22,413 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 629 out of 796 [2022-11-02 20:45:22,433 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 778 places, 693 transitions, 1868 flow. Second operand has 66 states, 66 states have (on average 631.8939393939394) internal successors, (41705), 66 states have internal predecessors, (41705), 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 20:45:22,434 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:45:22,434 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 629 of 796 [2022-11-02 20:45:22,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:45:24,177 INFO L130 PetriNetUnfolder]: 0/830 cut-off events. [2022-11-02 20:45:24,178 INFO L131 PetriNetUnfolder]: For 1135/1135 co-relation queries the response was YES. [2022-11-02 20:45:24,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1411 conditions, 830 events. 0/830 cut-off events. For 1135/1135 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2051 event pairs, 0 based on Foata normal form. 8/838 useless extension candidates. Maximal degree in co-relation 0. Up to 40 conditions per place. [2022-11-02 20:45:24,179 INFO L137 encePairwiseOnDemand]: 791/796 looper letters, 69 selfloop transitions, 67 changer transitions 0/744 dead transitions. [2022-11-02 20:45:24,179 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 835 places, 744 transitions, 2542 flow [2022-11-02 20:45:24,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-02 20:45:24,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2022-11-02 20:45:24,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 43545 transitions. [2022-11-02 20:45:24,199 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7928228097006773 [2022-11-02 20:45:24,199 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 43545 transitions. [2022-11-02 20:45:24,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 43545 transitions. [2022-11-02 20:45:24,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:45:24,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 43545 transitions. [2022-11-02 20:45:24,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 631.0869565217391) internal successors, (43545), 69 states have internal predecessors, (43545), 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 20:45:24,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 796.0) internal successors, (55720), 70 states have internal predecessors, (55720), 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 20:45:24,261 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 796.0) internal successors, (55720), 70 states have internal predecessors, (55720), 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 20:45:24,261 INFO L175 Difference]: Start difference. First operand has 778 places, 693 transitions, 1868 flow. Second operand 69 states and 43545 transitions. [2022-11-02 20:45:24,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 835 places, 744 transitions, 2542 flow [2022-11-02 20:45:24,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 802 places, 744 transitions, 2357 flow, removed 17 selfloop flow, removed 33 redundant places. [2022-11-02 20:45:24,273 INFO L231 Difference]: Finished difference. Result has 802 places, 703 transitions, 1999 flow [2022-11-02 20:45:24,274 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=1704, PETRI_DIFFERENCE_MINUEND_PLACES=734, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=636, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=1999, PETRI_PLACES=802, PETRI_TRANSITIONS=703} [2022-11-02 20:45:24,274 INFO L287 CegarLoopForPetriNet]: 705 programPoint places, 97 predicate places. [2022-11-02 20:45:24,274 INFO L495 AbstractCegarLoop]: Abstraction has has 802 places, 703 transitions, 1999 flow [2022-11-02 20:45:24,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 631.8939393939394) internal successors, (41705), 66 states have internal predecessors, (41705), 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 20:45:24,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:24,282 INFO L208 CegarLoopForPetriNet]: trace histogram [23, 23, 23, 23, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:45:24,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-11-02 20:45:24,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2022-11-02 20:45:24,487 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:45:24,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:24,487 INFO L85 PathProgramCache]: Analyzing trace with hash -780882567, now seen corresponding path program 1 times [2022-11-02 20:45:24,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:24,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417103367] [2022-11-02 20:45:24,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:24,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:24,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:45:24,518 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:45:24,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:45:24,596 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:45:24,596 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:45:24,596 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:45:24,596 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:45:24,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-11-02 20:45:24,597 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:45:24,597 WARN L233 ceAbstractionStarter]: 22 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:45:24,597 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 23 thread instances. [2022-11-02 20:45:24,673 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:45:24,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 734 places, 829 transitions, 2279 flow [2022-11-02 20:45:25,399 INFO L130 PetriNetUnfolder]: 234/1652 cut-off events. [2022-11-02 20:45:25,399 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2022-11-02 20:45:25,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1998 conditions, 1652 events. 234/1652 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 6075 event pairs, 0 based on Foata normal form. 0/1370 useless extension candidates. Maximal degree in co-relation 1875. Up to 48 conditions per place. [2022-11-02 20:45:25,473 INFO L82 GeneralOperation]: Start removeDead. Operand has 734 places, 829 transitions, 2279 flow [2022-11-02 20:45:25,497 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 734 places, 829 transitions, 2279 flow [2022-11-02 20:45:25,498 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:45:25,498 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;@4e0ca16a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:45:25,498 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:45:25,502 INFO L130 PetriNetUnfolder]: 2/72 cut-off events. [2022-11-02 20:45:25,502 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:45:25,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:25,502 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] [2022-11-02 20:45:25,502 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:45:25,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:25,502 INFO L85 PathProgramCache]: Analyzing trace with hash -63588447, now seen corresponding path program 1 times [2022-11-02 20:45:25,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:25,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19668184] [2022-11-02 20:45:25,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:25,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:25,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:25,516 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 20:45:25,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:25,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19668184] [2022-11-02 20:45:25,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19668184] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:45:25,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:45:25,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:45:25,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704471027] [2022-11-02 20:45:25,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:45:25,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:45:25,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:25,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:45:25,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:45:25,520 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 663 out of 829 [2022-11-02 20:45:25,520 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 734 places, 829 transitions, 2279 flow. Second operand has 2 states, 2 states have (on average 663.5) internal successors, (1327), 2 states have internal predecessors, (1327), 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 20:45:25,520 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:45:25,520 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 663 of 829 [2022-11-02 20:45:25,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:45:26,164 INFO L130 PetriNetUnfolder]: 0/1394 cut-off events. [2022-11-02 20:45:26,165 INFO L131 PetriNetUnfolder]: For 2553/2553 co-relation queries the response was YES. [2022-11-02 20:45:26,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1764 conditions, 1394 events. 0/1394 cut-off events. For 2553/2553 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 5656 event pairs, 0 based on Foata normal form. 1622/2968 useless extension candidates. Maximal degree in co-relation 0. Up to 24 conditions per place. [2022-11-02 20:45:26,167 INFO L137 encePairwiseOnDemand]: 687/829 looper letters, 23 selfloop transitions, 0 changer transitions 11/686 dead transitions. [2022-11-02 20:45:26,167 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 734 places, 686 transitions, 2039 flow [2022-11-02 20:45:26,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:45:26,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:45:26,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1491 transitions. [2022-11-02 20:45:26,169 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8992762364294331 [2022-11-02 20:45:26,169 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1491 transitions. [2022-11-02 20:45:26,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1491 transitions. [2022-11-02 20:45:26,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:45:26,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1491 transitions. [2022-11-02 20:45:26,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 745.5) internal successors, (1491), 2 states have internal predecessors, (1491), 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 20:45:26,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 829.0) internal successors, (2487), 3 states have internal predecessors, (2487), 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 20:45:26,172 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 829.0) internal successors, (2487), 3 states have internal predecessors, (2487), 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 20:45:26,172 INFO L175 Difference]: Start difference. First operand has 734 places, 829 transitions, 2279 flow. Second operand 2 states and 1491 transitions. [2022-11-02 20:45:26,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 734 places, 686 transitions, 2039 flow [2022-11-02 20:45:26,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 734 places, 686 transitions, 1533 flow, removed 253 selfloop flow, removed 0 redundant places. [2022-11-02 20:45:26,181 INFO L231 Difference]: Finished difference. Result has 734 places, 675 transitions, 1465 flow [2022-11-02 20:45:26,182 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=829, PETRI_DIFFERENCE_MINUEND_FLOW=1487, PETRI_DIFFERENCE_MINUEND_PLACES=733, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=686, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1465, PETRI_PLACES=734, PETRI_TRANSITIONS=675} [2022-11-02 20:45:26,182 INFO L287 CegarLoopForPetriNet]: 734 programPoint places, 0 predicate places. [2022-11-02 20:45:26,182 INFO L495 AbstractCegarLoop]: Abstraction has has 734 places, 675 transitions, 1465 flow [2022-11-02 20:45:26,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 663.5) internal successors, (1327), 2 states have internal predecessors, (1327), 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 20:45:26,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:26,183 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] [2022-11-02 20:45:26,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-11-02 20:45:26,183 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:45:26,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:26,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1860539806, now seen corresponding path program 1 times [2022-11-02 20:45:26,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:26,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621737106] [2022-11-02 20:45:26,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:26,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:26,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:26,202 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 20:45:26,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:26,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621737106] [2022-11-02 20:45:26,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621737106] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:45:26,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:45:26,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:45:26,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351356125] [2022-11-02 20:45:26,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:45:26,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:45:26,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:26,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:45:26,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:45:26,206 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 656 out of 829 [2022-11-02 20:45:26,206 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 734 places, 675 transitions, 1465 flow. Second operand has 3 states, 3 states have (on average 657.0) internal successors, (1971), 3 states have internal predecessors, (1971), 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 20:45:26,206 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:45:26,207 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 656 of 829 [2022-11-02 20:45:26,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:45:26,807 INFO L130 PetriNetUnfolder]: 0/1119 cut-off events. [2022-11-02 20:45:26,807 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-11-02 20:45:26,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1356 conditions, 1119 events. 0/1119 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3771 event pairs, 0 based on Foata normal form. 0/1096 useless extension candidates. Maximal degree in co-relation 0. Up to 138 conditions per place. [2022-11-02 20:45:26,810 INFO L137 encePairwiseOnDemand]: 826/829 looper letters, 32 selfloop transitions, 2 changer transitions 0/679 dead transitions. [2022-11-02 20:45:26,811 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 725 places, 679 transitions, 1541 flow [2022-11-02 20:45:26,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:45:26,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:45:26,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2003 transitions. [2022-11-02 20:45:26,813 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8053880176919984 [2022-11-02 20:45:26,813 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2003 transitions. [2022-11-02 20:45:26,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2003 transitions. [2022-11-02 20:45:26,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:45:26,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2003 transitions. [2022-11-02 20:45:26,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 667.6666666666666) internal successors, (2003), 3 states have internal predecessors, (2003), 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 20:45:26,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 829.0) internal successors, (3316), 4 states have internal predecessors, (3316), 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 20:45:26,816 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 829.0) internal successors, (3316), 4 states have internal predecessors, (3316), 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 20:45:26,816 INFO L175 Difference]: Start difference. First operand has 734 places, 675 transitions, 1465 flow. Second operand 3 states and 2003 transitions. [2022-11-02 20:45:26,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 725 places, 679 transitions, 1541 flow [2022-11-02 20:45:26,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 725 places, 679 transitions, 1541 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:45:26,825 INFO L231 Difference]: Finished difference. Result has 726 places, 676 transitions, 1477 flow [2022-11-02 20:45:26,826 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=829, PETRI_DIFFERENCE_MINUEND_FLOW=1465, PETRI_DIFFERENCE_MINUEND_PLACES=723, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=673, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1477, PETRI_PLACES=726, PETRI_TRANSITIONS=676} [2022-11-02 20:45:26,826 INFO L287 CegarLoopForPetriNet]: 734 programPoint places, -8 predicate places. [2022-11-02 20:45:26,827 INFO L495 AbstractCegarLoop]: Abstraction has has 726 places, 676 transitions, 1477 flow [2022-11-02 20:45:26,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 657.0) internal successors, (1971), 3 states have internal predecessors, (1971), 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 20:45:26,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:26,827 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] [2022-11-02 20:45:26,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-11-02 20:45:26,828 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:45:26,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:26,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1202039306, now seen corresponding path program 1 times [2022-11-02 20:45:26,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:26,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71170561] [2022-11-02 20:45:26,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:26,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:26,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:26,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:26,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:26,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71170561] [2022-11-02 20:45:26,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71170561] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:45:26,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964122536] [2022-11-02 20:45:26,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:26,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:26,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:26,896 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:45:26,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-11-02 20:45:27,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:27,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:45:27,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:45:27,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:27,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:45:27,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:27,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964122536] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:45:27,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:45:27,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:45:27,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170205911] [2022-11-02 20:45:27,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:45:27,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:45:27,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:27,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:45:27,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:45:27,507 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 655 out of 829 [2022-11-02 20:45:27,509 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 726 places, 676 transitions, 1477 flow. Second operand has 10 states, 10 states have (on average 657.3) internal successors, (6573), 10 states have internal predecessors, (6573), 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 20:45:27,509 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:45:27,509 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 655 of 829 [2022-11-02 20:45:27,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:45:28,242 INFO L130 PetriNetUnfolder]: 0/1097 cut-off events. [2022-11-02 20:45:28,242 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2022-11-02 20:45:28,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1403 conditions, 1097 events. 0/1097 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3642 event pairs, 0 based on Foata normal form. 2/1099 useless extension candidates. Maximal degree in co-relation 0. Up to 87 conditions per place. [2022-11-02 20:45:28,245 INFO L137 encePairwiseOnDemand]: 823/829 looper letters, 33 selfloop transitions, 9 changer transitions 0/686 dead transitions. [2022-11-02 20:45:28,245 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 734 places, 686 transitions, 1583 flow [2022-11-02 20:45:28,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:45:28,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:45:28,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 5939 transitions. [2022-11-02 20:45:28,249 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7960058973327973 [2022-11-02 20:45:28,250 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 5939 transitions. [2022-11-02 20:45:28,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 5939 transitions. [2022-11-02 20:45:28,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:45:28,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 5939 transitions. [2022-11-02 20:45:28,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 659.8888888888889) internal successors, (5939), 9 states have internal predecessors, (5939), 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 20:45:28,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 829.0) internal successors, (8290), 10 states have internal predecessors, (8290), 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 20:45:28,261 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 829.0) internal successors, (8290), 10 states have internal predecessors, (8290), 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 20:45:28,261 INFO L175 Difference]: Start difference. First operand has 726 places, 676 transitions, 1477 flow. Second operand 9 states and 5939 transitions. [2022-11-02 20:45:28,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 734 places, 686 transitions, 1583 flow [2022-11-02 20:45:28,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 733 places, 686 transitions, 1581 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:45:28,272 INFO L231 Difference]: Finished difference. Result has 736 places, 682 transitions, 1525 flow [2022-11-02 20:45:28,273 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=829, PETRI_DIFFERENCE_MINUEND_FLOW=1475, PETRI_DIFFERENCE_MINUEND_PLACES=725, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=670, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1525, PETRI_PLACES=736, PETRI_TRANSITIONS=682} [2022-11-02 20:45:28,274 INFO L287 CegarLoopForPetriNet]: 734 programPoint places, 2 predicate places. [2022-11-02 20:45:28,274 INFO L495 AbstractCegarLoop]: Abstraction has has 736 places, 682 transitions, 1525 flow [2022-11-02 20:45:28,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 657.3) internal successors, (6573), 10 states have internal predecessors, (6573), 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 20:45:28,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:28,275 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:45:28,312 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-11-02 20:45:28,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:28,499 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:45:28,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:28,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1084817695, now seen corresponding path program 1 times [2022-11-02 20:45:28,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:28,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65481890] [2022-11-02 20:45:28,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:28,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:28,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:28,579 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:28,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:28,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65481890] [2022-11-02 20:45:28,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65481890] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:45:28,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896915529] [2022-11-02 20:45:28,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:28,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:28,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:28,581 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:45:28,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-11-02 20:45:29,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:29,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:45:29,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:45:29,187 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:29,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:45:29,283 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:29,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896915529] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:45:29,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:45:29,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:45:29,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678827650] [2022-11-02 20:45:29,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:45:29,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:45:29,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:29,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:45:29,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:45:29,290 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 655 out of 829 [2022-11-02 20:45:29,294 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 736 places, 682 transitions, 1525 flow. Second operand has 18 states, 18 states have (on average 657.6111111111111) internal successors, (11837), 18 states have internal predecessors, (11837), 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 20:45:29,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:45:29,295 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 655 of 829 [2022-11-02 20:45:29,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:45:30,232 INFO L130 PetriNetUnfolder]: 0/1053 cut-off events. [2022-11-02 20:45:30,232 INFO L131 PetriNetUnfolder]: For 132/132 co-relation queries the response was YES. [2022-11-02 20:45:30,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1524 conditions, 1053 events. 0/1053 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3371 event pairs, 0 based on Foata normal form. 4/1057 useless extension candidates. Maximal degree in co-relation 0. Up to 71 conditions per place. [2022-11-02 20:45:30,235 INFO L137 encePairwiseOnDemand]: 823/829 looper letters, 41 selfloop transitions, 21 changer transitions 0/706 dead transitions. [2022-11-02 20:45:30,235 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 756 places, 706 transitions, 1757 flow [2022-11-02 20:45:30,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:45:30,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:45:30,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 13821 transitions. [2022-11-02 20:45:30,247 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7938997070480786 [2022-11-02 20:45:30,247 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 13821 transitions. [2022-11-02 20:45:30,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 13821 transitions. [2022-11-02 20:45:30,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:45:30,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 13821 transitions. [2022-11-02 20:45:30,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 658.1428571428571) internal successors, (13821), 21 states have internal predecessors, (13821), 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 20:45:30,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 829.0) internal successors, (18238), 22 states have internal predecessors, (18238), 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 20:45:30,267 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 829.0) internal successors, (18238), 22 states have internal predecessors, (18238), 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 20:45:30,267 INFO L175 Difference]: Start difference. First operand has 736 places, 682 transitions, 1525 flow. Second operand 21 states and 13821 transitions. [2022-11-02 20:45:30,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 756 places, 706 transitions, 1757 flow [2022-11-02 20:45:30,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 755 places, 706 transitions, 1743 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:45:30,277 INFO L231 Difference]: Finished difference. Result has 760 places, 695 transitions, 1649 flow [2022-11-02 20:45:30,278 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=829, PETRI_DIFFERENCE_MINUEND_FLOW=1519, PETRI_DIFFERENCE_MINUEND_PLACES=735, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=671, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1649, PETRI_PLACES=760, PETRI_TRANSITIONS=695} [2022-11-02 20:45:30,278 INFO L287 CegarLoopForPetriNet]: 734 programPoint places, 26 predicate places. [2022-11-02 20:45:30,278 INFO L495 AbstractCegarLoop]: Abstraction has has 760 places, 695 transitions, 1649 flow [2022-11-02 20:45:30,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 657.6111111111111) internal successors, (11837), 18 states have internal predecessors, (11837), 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 20:45:30,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:30,280 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:45:30,305 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-11-02 20:45:30,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:30,480 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:45:30,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:30,480 INFO L85 PathProgramCache]: Analyzing trace with hash 709153987, now seen corresponding path program 1 times [2022-11-02 20:45:30,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:30,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879563982] [2022-11-02 20:45:30,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:30,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:30,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:30,682 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:30,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:30,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879563982] [2022-11-02 20:45:30,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879563982] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:45:30,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754588196] [2022-11-02 20:45:30,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:30,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:30,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:30,684 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:45:30,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-11-02 20:45:31,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:31,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:45:31,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:45:31,401 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:31,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:45:31,730 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:31,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754588196] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:45:31,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:45:31,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-02 20:45:31,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499050944] [2022-11-02 20:45:31,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:45:31,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:45:31,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:31,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:45:31,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:45:31,749 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 655 out of 829 [2022-11-02 20:45:31,760 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 760 places, 695 transitions, 1649 flow. Second operand has 34 states, 34 states have (on average 657.7941176470588) internal successors, (22365), 34 states have internal predecessors, (22365), 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 20:45:31,761 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:45:31,761 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 655 of 829 [2022-11-02 20:45:31,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:45:33,034 INFO L130 PetriNetUnfolder]: 0/965 cut-off events. [2022-11-02 20:45:33,035 INFO L131 PetriNetUnfolder]: For 492/492 co-relation queries the response was YES. [2022-11-02 20:45:33,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1551 conditions, 965 events. 0/965 cut-off events. For 492/492 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2782 event pairs, 0 based on Foata normal form. 8/973 useless extension candidates. Maximal degree in co-relation 0. Up to 43 conditions per place. [2022-11-02 20:45:33,037 INFO L137 encePairwiseOnDemand]: 823/829 looper letters, 57 selfloop transitions, 45 changer transitions 0/746 dead transitions. [2022-11-02 20:45:33,037 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 804 places, 746 transitions, 2169 flow [2022-11-02 20:45:33,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-02 20:45:33,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-02 20:45:33,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 29585 transitions. [2022-11-02 20:45:33,051 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7930572309341911 [2022-11-02 20:45:33,051 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 29585 transitions. [2022-11-02 20:45:33,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 29585 transitions. [2022-11-02 20:45:33,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:45:33,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 29585 transitions. [2022-11-02 20:45:33,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 657.4444444444445) internal successors, (29585), 45 states have internal predecessors, (29585), 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 20:45:33,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 829.0) internal successors, (38134), 46 states have internal predecessors, (38134), 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 20:45:33,093 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 829.0) internal successors, (38134), 46 states have internal predecessors, (38134), 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 20:45:33,093 INFO L175 Difference]: Start difference. First operand has 760 places, 695 transitions, 1649 flow. Second operand 45 states and 29585 transitions. [2022-11-02 20:45:33,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 804 places, 746 transitions, 2169 flow [2022-11-02 20:45:33,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 798 places, 746 transitions, 2129 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-02 20:45:33,104 INFO L231 Difference]: Finished difference. Result has 807 places, 720 transitions, 1927 flow [2022-11-02 20:45:33,104 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=829, PETRI_DIFFERENCE_MINUEND_FLOW=1625, PETRI_DIFFERENCE_MINUEND_PLACES=754, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=672, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1927, PETRI_PLACES=807, PETRI_TRANSITIONS=720} [2022-11-02 20:45:33,105 INFO L287 CegarLoopForPetriNet]: 734 programPoint places, 73 predicate places. [2022-11-02 20:45:33,105 INFO L495 AbstractCegarLoop]: Abstraction has has 807 places, 720 transitions, 1927 flow [2022-11-02 20:45:33,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 657.7941176470588) internal successors, (22365), 34 states have internal predecessors, (22365), 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 20:45:33,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:33,109 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:45:33,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-11-02 20:45:33,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-11-02 20:45:33,310 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:45:33,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:33,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1368193207, now seen corresponding path program 1 times [2022-11-02 20:45:33,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:33,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183080934] [2022-11-02 20:45:33,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:33,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:33,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:33,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:33,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:33,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183080934] [2022-11-02 20:45:33,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183080934] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:45:33,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007883510] [2022-11-02 20:45:33,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:33,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:33,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:33,911 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:45:33,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-11-02 20:45:34,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:34,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 20:45:34,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:45:34,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:34,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:45:35,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:35,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007883510] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:45:35,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:45:35,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-02 20:45:35,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213754111] [2022-11-02 20:45:35,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:45:35,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-02 20:45:35,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:35,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-02 20:45:35,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-02 20:45:35,753 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 655 out of 829 [2022-11-02 20:45:35,775 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 807 places, 720 transitions, 1927 flow. Second operand has 66 states, 66 states have (on average 657.8939393939394) internal successors, (43421), 66 states have internal predecessors, (43421), 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 20:45:35,775 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:45:35,775 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 655 of 829 [2022-11-02 20:45:35,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:45:37,709 INFO L130 PetriNetUnfolder]: 0/866 cut-off events. [2022-11-02 20:45:37,709 INFO L131 PetriNetUnfolder]: For 1256/1256 co-relation queries the response was YES. [2022-11-02 20:45:37,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1474 conditions, 866 events. 0/866 cut-off events. For 1256/1256 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2149 event pairs, 0 based on Foata normal form. 9/875 useless extension candidates. Maximal degree in co-relation 0. Up to 42 conditions per place. [2022-11-02 20:45:37,711 INFO L137 encePairwiseOnDemand]: 824/829 looper letters, 72 selfloop transitions, 70 changer transitions 0/776 dead transitions. [2022-11-02 20:45:37,711 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 867 places, 776 transitions, 2657 flow [2022-11-02 20:45:37,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-02 20:45:37,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2022-11-02 20:45:37,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 47311 transitions. [2022-11-02 20:45:37,732 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7926383862752983 [2022-11-02 20:45:37,732 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 47311 transitions. [2022-11-02 20:45:37,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 47311 transitions. [2022-11-02 20:45:37,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:45:37,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 47311 transitions. [2022-11-02 20:45:37,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 657.0972222222222) internal successors, (47311), 72 states have internal predecessors, (47311), 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 20:45:37,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 829.0) internal successors, (60517), 73 states have internal predecessors, (60517), 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 20:45:37,799 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 829.0) internal successors, (60517), 73 states have internal predecessors, (60517), 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 20:45:37,799 INFO L175 Difference]: Start difference. First operand has 807 places, 720 transitions, 1927 flow. Second operand 72 states and 47311 transitions. [2022-11-02 20:45:37,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 867 places, 776 transitions, 2657 flow [2022-11-02 20:45:37,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 834 places, 776 transitions, 2464 flow, removed 18 selfloop flow, removed 33 redundant places. [2022-11-02 20:45:37,810 INFO L231 Difference]: Finished difference. Result has 834 places, 733 transitions, 2087 flow [2022-11-02 20:45:37,811 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=829, PETRI_DIFFERENCE_MINUEND_FLOW=1763, PETRI_DIFFERENCE_MINUEND_PLACES=763, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=663, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=2087, PETRI_PLACES=834, PETRI_TRANSITIONS=733} [2022-11-02 20:45:37,811 INFO L287 CegarLoopForPetriNet]: 734 programPoint places, 100 predicate places. [2022-11-02 20:45:37,811 INFO L495 AbstractCegarLoop]: Abstraction has has 834 places, 733 transitions, 2087 flow [2022-11-02 20:45:37,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 657.8939393939394) internal successors, (43421), 66 states have internal predecessors, (43421), 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 20:45:37,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:37,815 INFO L208 CegarLoopForPetriNet]: trace histogram [24, 24, 24, 24, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:45:37,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-11-02 20:45:38,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:38,016 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:45:38,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:38,016 INFO L85 PathProgramCache]: Analyzing trace with hash -136700829, now seen corresponding path program 1 times [2022-11-02 20:45:38,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:38,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38233039] [2022-11-02 20:45:38,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:38,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:38,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:45:38,051 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:45:38,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:45:38,124 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:45:38,125 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:45:38,125 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:45:38,125 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:45:38,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-11-02 20:45:38,125 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:45:38,126 WARN L233 ceAbstractionStarter]: 23 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:45:38,126 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 24 thread instances. [2022-11-02 20:45:38,199 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:45:38,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 763 places, 862 transitions, 2396 flow [2022-11-02 20:45:39,004 INFO L130 PetriNetUnfolder]: 244/1721 cut-off events. [2022-11-02 20:45:39,004 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2022-11-02 20:45:39,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2094 conditions, 1721 events. 244/1721 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 6349 event pairs, 0 based on Foata normal form. 0/1427 useless extension candidates. Maximal degree in co-relation 1970. Up to 50 conditions per place. [2022-11-02 20:45:39,106 INFO L82 GeneralOperation]: Start removeDead. Operand has 763 places, 862 transitions, 2396 flow [2022-11-02 20:45:39,139 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 763 places, 862 transitions, 2396 flow [2022-11-02 20:45:39,139 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:45:39,140 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;@4e0ca16a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:45:39,140 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:45:39,144 INFO L130 PetriNetUnfolder]: 5/82 cut-off events. [2022-11-02 20:45:39,144 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:45:39,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:39,144 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] [2022-11-02 20:45:39,144 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:45:39,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:39,144 INFO L85 PathProgramCache]: Analyzing trace with hash -255235551, now seen corresponding path program 1 times [2022-11-02 20:45:39,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:39,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940217065] [2022-11-02 20:45:39,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:39,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:39,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:39,160 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 20:45:39,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:39,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940217065] [2022-11-02 20:45:39,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940217065] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:45:39,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:45:39,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:45:39,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642606654] [2022-11-02 20:45:39,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:45:39,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:45:39,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:39,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:45:39,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:45:39,162 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 689 out of 862 [2022-11-02 20:45:39,163 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 763 places, 862 transitions, 2396 flow. Second operand has 2 states, 2 states have (on average 689.5) internal successors, (1379), 2 states have internal predecessors, (1379), 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 20:45:39,163 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:45:39,163 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 689 of 862 [2022-11-02 20:45:39,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:45:39,820 INFO L130 PetriNetUnfolder]: 0/1452 cut-off events. [2022-11-02 20:45:39,820 INFO L131 PetriNetUnfolder]: For 2876/2876 co-relation queries the response was YES. [2022-11-02 20:45:39,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1850 conditions, 1452 events. 0/1452 cut-off events. For 2876/2876 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 5840 event pairs, 0 based on Foata normal form. 1764/3166 useless extension candidates. Maximal degree in co-relation 0. Up to 25 conditions per place. [2022-11-02 20:45:39,822 INFO L137 encePairwiseOnDemand]: 714/862 looper letters, 24 selfloop transitions, 0 changer transitions 11/713 dead transitions. [2022-11-02 20:45:39,823 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 763 places, 713 transitions, 2146 flow [2022-11-02 20:45:39,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:45:39,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:45:39,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1550 transitions. [2022-11-02 20:45:39,824 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8990719257540604 [2022-11-02 20:45:39,824 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1550 transitions. [2022-11-02 20:45:39,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1550 transitions. [2022-11-02 20:45:39,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:45:39,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1550 transitions. [2022-11-02 20:45:39,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 775.0) internal successors, (1550), 2 states have internal predecessors, (1550), 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 20:45:39,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 862.0) internal successors, (2586), 3 states have internal predecessors, (2586), 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 20:45:39,827 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 862.0) internal successors, (2586), 3 states have internal predecessors, (2586), 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 20:45:39,827 INFO L175 Difference]: Start difference. First operand has 763 places, 862 transitions, 2396 flow. Second operand 2 states and 1550 transitions. [2022-11-02 20:45:39,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 763 places, 713 transitions, 2146 flow [2022-11-02 20:45:39,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 763 places, 713 transitions, 1594 flow, removed 276 selfloop flow, removed 0 redundant places. [2022-11-02 20:45:39,837 INFO L231 Difference]: Finished difference. Result has 763 places, 702 transitions, 1524 flow [2022-11-02 20:45:39,838 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=862, PETRI_DIFFERENCE_MINUEND_FLOW=1546, PETRI_DIFFERENCE_MINUEND_PLACES=762, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=713, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1524, PETRI_PLACES=763, PETRI_TRANSITIONS=702} [2022-11-02 20:45:39,838 INFO L287 CegarLoopForPetriNet]: 763 programPoint places, 0 predicate places. [2022-11-02 20:45:39,839 INFO L495 AbstractCegarLoop]: Abstraction has has 763 places, 702 transitions, 1524 flow [2022-11-02 20:45:39,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 689.5) internal successors, (1379), 2 states have internal predecessors, (1379), 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 20:45:39,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:39,839 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] [2022-11-02 20:45:39,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-11-02 20:45:39,839 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:45:39,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:39,839 INFO L85 PathProgramCache]: Analyzing trace with hash -2052186910, now seen corresponding path program 1 times [2022-11-02 20:45:39,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:39,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136934259] [2022-11-02 20:45:39,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:39,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:39,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:39,858 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 20:45:39,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:39,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136934259] [2022-11-02 20:45:39,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136934259] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:45:39,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:45:39,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:45:39,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156720085] [2022-11-02 20:45:39,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:45:39,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:45:39,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:39,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:45:39,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:45:39,862 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 682 out of 862 [2022-11-02 20:45:39,863 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 763 places, 702 transitions, 1524 flow. Second operand has 3 states, 3 states have (on average 683.0) internal successors, (2049), 3 states have internal predecessors, (2049), 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 20:45:39,863 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:45:39,863 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 682 of 862 [2022-11-02 20:45:39,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:45:40,524 INFO L130 PetriNetUnfolder]: 0/1166 cut-off events. [2022-11-02 20:45:40,525 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-11-02 20:45:40,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1413 conditions, 1166 events. 0/1166 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3964 event pairs, 0 based on Foata normal form. 0/1142 useless extension candidates. Maximal degree in co-relation 0. Up to 144 conditions per place. [2022-11-02 20:45:40,527 INFO L137 encePairwiseOnDemand]: 859/862 looper letters, 33 selfloop transitions, 2 changer transitions 0/706 dead transitions. [2022-11-02 20:45:40,528 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 754 places, 706 transitions, 1602 flow [2022-11-02 20:45:40,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:45:40,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:45:40,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2082 transitions. [2022-11-02 20:45:40,530 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8051044083526682 [2022-11-02 20:45:40,530 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2082 transitions. [2022-11-02 20:45:40,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2082 transitions. [2022-11-02 20:45:40,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:45:40,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2082 transitions. [2022-11-02 20:45:40,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 694.0) internal successors, (2082), 3 states have internal predecessors, (2082), 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 20:45:40,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 862.0) internal successors, (3448), 4 states have internal predecessors, (3448), 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 20:45:40,534 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 862.0) internal successors, (3448), 4 states have internal predecessors, (3448), 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 20:45:40,535 INFO L175 Difference]: Start difference. First operand has 763 places, 702 transitions, 1524 flow. Second operand 3 states and 2082 transitions. [2022-11-02 20:45:40,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 754 places, 706 transitions, 1602 flow [2022-11-02 20:45:40,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 754 places, 706 transitions, 1602 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:45:40,546 INFO L231 Difference]: Finished difference. Result has 755 places, 703 transitions, 1536 flow [2022-11-02 20:45:40,547 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=862, PETRI_DIFFERENCE_MINUEND_FLOW=1524, PETRI_DIFFERENCE_MINUEND_PLACES=752, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=700, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1536, PETRI_PLACES=755, PETRI_TRANSITIONS=703} [2022-11-02 20:45:40,547 INFO L287 CegarLoopForPetriNet]: 763 programPoint places, -8 predicate places. [2022-11-02 20:45:40,547 INFO L495 AbstractCegarLoop]: Abstraction has has 755 places, 703 transitions, 1536 flow [2022-11-02 20:45:40,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 683.0) internal successors, (2049), 3 states have internal predecessors, (2049), 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 20:45:40,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:40,548 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] [2022-11-02 20:45:40,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-11-02 20:45:40,549 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:45:40,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:40,549 INFO L85 PathProgramCache]: Analyzing trace with hash -2110823594, now seen corresponding path program 1 times [2022-11-02 20:45:40,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:40,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221777755] [2022-11-02 20:45:40,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:40,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:40,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:40,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:40,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:40,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221777755] [2022-11-02 20:45:40,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221777755] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:45:40,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454706429] [2022-11-02 20:45:40,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:40,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:40,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:40,598 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:45:40,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-11-02 20:45:41,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:41,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:45:41,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:45:41,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:41,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:45:41,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:41,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454706429] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:45:41,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:45:41,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:45:41,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117771709] [2022-11-02 20:45:41,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:45:41,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:45:41,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:41,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:45:41,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:45:41,247 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 681 out of 862 [2022-11-02 20:45:41,249 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 755 places, 703 transitions, 1536 flow. Second operand has 10 states, 10 states have (on average 683.3) internal successors, (6833), 10 states have internal predecessors, (6833), 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 20:45:41,250 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:45:41,250 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 681 of 862 [2022-11-02 20:45:41,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:45:41,964 INFO L130 PetriNetUnfolder]: 0/1144 cut-off events. [2022-11-02 20:45:41,964 INFO L131 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-11-02 20:45:41,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1463 conditions, 1144 events. 0/1144 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3834 event pairs, 0 based on Foata normal form. 2/1146 useless extension candidates. Maximal degree in co-relation 0. Up to 91 conditions per place. [2022-11-02 20:45:41,966 INFO L137 encePairwiseOnDemand]: 856/862 looper letters, 34 selfloop transitions, 9 changer transitions 0/713 dead transitions. [2022-11-02 20:45:41,966 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 763 places, 713 transitions, 1644 flow [2022-11-02 20:45:41,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:45:41,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:45:41,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 6174 transitions. [2022-11-02 20:45:41,971 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7958236658932715 [2022-11-02 20:45:41,971 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 6174 transitions. [2022-11-02 20:45:41,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 6174 transitions. [2022-11-02 20:45:41,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:45:41,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 6174 transitions. [2022-11-02 20:45:41,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 686.0) internal successors, (6174), 9 states have internal predecessors, (6174), 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 20:45:41,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 862.0) internal successors, (8620), 10 states have internal predecessors, (8620), 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 20:45:41,980 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 862.0) internal successors, (8620), 10 states have internal predecessors, (8620), 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 20:45:41,980 INFO L175 Difference]: Start difference. First operand has 755 places, 703 transitions, 1536 flow. Second operand 9 states and 6174 transitions. [2022-11-02 20:45:41,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 763 places, 713 transitions, 1644 flow [2022-11-02 20:45:41,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 762 places, 713 transitions, 1642 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:45:41,989 INFO L231 Difference]: Finished difference. Result has 765 places, 709 transitions, 1584 flow [2022-11-02 20:45:41,990 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=862, PETRI_DIFFERENCE_MINUEND_FLOW=1534, PETRI_DIFFERENCE_MINUEND_PLACES=754, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=697, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1584, PETRI_PLACES=765, PETRI_TRANSITIONS=709} [2022-11-02 20:45:41,990 INFO L287 CegarLoopForPetriNet]: 763 programPoint places, 2 predicate places. [2022-11-02 20:45:41,990 INFO L495 AbstractCegarLoop]: Abstraction has has 765 places, 709 transitions, 1584 flow [2022-11-02 20:45:41,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 683.3) internal successors, (6833), 10 states have internal predecessors, (6833), 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 20:45:41,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:41,991 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:45:42,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-11-02 20:45:42,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:42,195 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:45:42,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:42,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1492616703, now seen corresponding path program 1 times [2022-11-02 20:45:42,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:42,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940138551] [2022-11-02 20:45:42,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:42,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:42,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:42,266 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:42,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:42,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940138551] [2022-11-02 20:45:42,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940138551] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:45:42,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376897202] [2022-11-02 20:45:42,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:42,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:42,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:42,267 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:45:42,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-11-02 20:45:42,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:42,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:45:42,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:45:42,961 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:42,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:45:43,070 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:43,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376897202] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:45:43,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:45:43,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:45:43,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730248765] [2022-11-02 20:45:43,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:45:43,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:45:43,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:43,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:45:43,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:45:43,083 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 681 out of 862 [2022-11-02 20:45:43,087 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 765 places, 709 transitions, 1584 flow. Second operand has 18 states, 18 states have (on average 683.6111111111111) internal successors, (12305), 18 states have internal predecessors, (12305), 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 20:45:43,087 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:45:43,087 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 681 of 862 [2022-11-02 20:45:43,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:45:44,056 INFO L130 PetriNetUnfolder]: 0/1100 cut-off events. [2022-11-02 20:45:44,056 INFO L131 PetriNetUnfolder]: For 138/138 co-relation queries the response was YES. [2022-11-02 20:45:44,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1592 conditions, 1100 events. 0/1100 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3542 event pairs, 0 based on Foata normal form. 4/1104 useless extension candidates. Maximal degree in co-relation 0. Up to 75 conditions per place. [2022-11-02 20:45:44,059 INFO L137 encePairwiseOnDemand]: 856/862 looper letters, 42 selfloop transitions, 21 changer transitions 0/733 dead transitions. [2022-11-02 20:45:44,059 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 785 places, 733 transitions, 1818 flow [2022-11-02 20:45:44,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:45:44,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:45:44,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 14368 transitions. [2022-11-02 20:45:44,066 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7937244503369794 [2022-11-02 20:45:44,066 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 14368 transitions. [2022-11-02 20:45:44,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 14368 transitions. [2022-11-02 20:45:44,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:45:44,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 14368 transitions. [2022-11-02 20:45:44,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 684.1904761904761) internal successors, (14368), 21 states have internal predecessors, (14368), 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 20:45:44,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 862.0) internal successors, (18964), 22 states have internal predecessors, (18964), 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 20:45:44,088 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 862.0) internal successors, (18964), 22 states have internal predecessors, (18964), 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 20:45:44,088 INFO L175 Difference]: Start difference. First operand has 765 places, 709 transitions, 1584 flow. Second operand 21 states and 14368 transitions. [2022-11-02 20:45:44,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 785 places, 733 transitions, 1818 flow [2022-11-02 20:45:44,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 784 places, 733 transitions, 1804 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:45:44,098 INFO L231 Difference]: Finished difference. Result has 789 places, 722 transitions, 1708 flow [2022-11-02 20:45:44,098 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=862, PETRI_DIFFERENCE_MINUEND_FLOW=1578, PETRI_DIFFERENCE_MINUEND_PLACES=764, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=698, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1708, PETRI_PLACES=789, PETRI_TRANSITIONS=722} [2022-11-02 20:45:44,098 INFO L287 CegarLoopForPetriNet]: 763 programPoint places, 26 predicate places. [2022-11-02 20:45:44,099 INFO L495 AbstractCegarLoop]: Abstraction has has 789 places, 722 transitions, 1708 flow [2022-11-02 20:45:44,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 683.6111111111111) internal successors, (12305), 18 states have internal predecessors, (12305), 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 20:45:44,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:44,100 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:45:44,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-11-02 20:45:44,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-11-02 20:45:44,301 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:45:44,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:44,301 INFO L85 PathProgramCache]: Analyzing trace with hash -111277213, now seen corresponding path program 1 times [2022-11-02 20:45:44,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:44,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715054112] [2022-11-02 20:45:44,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:44,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:44,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:44,500 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:44,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:44,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715054112] [2022-11-02 20:45:44,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715054112] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:45:44,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335482933] [2022-11-02 20:45:44,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:44,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:44,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:44,502 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:45:44,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-11-02 20:45:45,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:45,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:45:45,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:45:45,227 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:45,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:45:45,524 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:45,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335482933] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:45:45,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:45:45,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-02 20:45:45,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726817567] [2022-11-02 20:45:45,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:45:45,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:45:45,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:45,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:45:45,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:45:45,538 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 681 out of 862 [2022-11-02 20:45:45,545 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 789 places, 722 transitions, 1708 flow. Second operand has 34 states, 34 states have (on average 683.7941176470588) internal successors, (23249), 34 states have internal predecessors, (23249), 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 20:45:45,545 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:45:45,545 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 681 of 862 [2022-11-02 20:45:45,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:45:46,789 INFO L130 PetriNetUnfolder]: 0/1012 cut-off events. [2022-11-02 20:45:46,789 INFO L131 PetriNetUnfolder]: For 519/519 co-relation queries the response was YES. [2022-11-02 20:45:46,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1628 conditions, 1012 events. 0/1012 cut-off events. For 519/519 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2958 event pairs, 0 based on Foata normal form. 8/1020 useless extension candidates. Maximal degree in co-relation 0. Up to 45 conditions per place. [2022-11-02 20:45:46,792 INFO L137 encePairwiseOnDemand]: 856/862 looper letters, 58 selfloop transitions, 45 changer transitions 0/773 dead transitions. [2022-11-02 20:45:46,792 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 833 places, 773 transitions, 2230 flow [2022-11-02 20:45:46,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-02 20:45:46,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-02 20:45:46,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 30756 transitions. [2022-11-02 20:45:46,815 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7928847641144625 [2022-11-02 20:45:46,815 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 30756 transitions. [2022-11-02 20:45:46,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 30756 transitions. [2022-11-02 20:45:46,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:45:46,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 30756 transitions. [2022-11-02 20:45:46,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 683.4666666666667) internal successors, (30756), 45 states have internal predecessors, (30756), 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 20:45:46,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 862.0) internal successors, (39652), 46 states have internal predecessors, (39652), 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 20:45:46,875 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 862.0) internal successors, (39652), 46 states have internal predecessors, (39652), 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 20:45:46,875 INFO L175 Difference]: Start difference. First operand has 789 places, 722 transitions, 1708 flow. Second operand 45 states and 30756 transitions. [2022-11-02 20:45:46,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 833 places, 773 transitions, 2230 flow [2022-11-02 20:45:46,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 827 places, 773 transitions, 2190 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-02 20:45:46,886 INFO L231 Difference]: Finished difference. Result has 836 places, 747 transitions, 1986 flow [2022-11-02 20:45:46,886 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=862, PETRI_DIFFERENCE_MINUEND_FLOW=1684, PETRI_DIFFERENCE_MINUEND_PLACES=783, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=699, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1986, PETRI_PLACES=836, PETRI_TRANSITIONS=747} [2022-11-02 20:45:46,886 INFO L287 CegarLoopForPetriNet]: 763 programPoint places, 73 predicate places. [2022-11-02 20:45:46,886 INFO L495 AbstractCegarLoop]: Abstraction has has 836 places, 747 transitions, 1986 flow [2022-11-02 20:45:46,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 683.7941176470588) internal successors, (23249), 34 states have internal predecessors, (23249), 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 20:45:46,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:46,889 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:45:46,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-11-02 20:45:47,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-11-02 20:45:47,089 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:45:47,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:47,089 INFO L85 PathProgramCache]: Analyzing trace with hash 74524247, now seen corresponding path program 1 times [2022-11-02 20:45:47,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:47,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386342347] [2022-11-02 20:45:47,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:47,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:47,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:47,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:47,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:47,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386342347] [2022-11-02 20:45:47,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386342347] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:45:47,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192185522] [2022-11-02 20:45:47,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:47,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:47,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:47,669 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:45:47,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-11-02 20:45:48,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:48,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 20:45:48,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:45:48,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:48,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:45:49,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:49,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192185522] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:45:49,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:45:49,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-02 20:45:49,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578177924] [2022-11-02 20:45:49,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:45:49,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-02 20:45:49,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:49,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-02 20:45:49,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-02 20:45:49,493 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 681 out of 862 [2022-11-02 20:45:49,507 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 836 places, 747 transitions, 1986 flow. Second operand has 66 states, 66 states have (on average 683.8939393939394) internal successors, (45137), 66 states have internal predecessors, (45137), 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 20:45:49,507 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:45:49,507 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 681 of 862 [2022-11-02 20:45:49,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:45:51,526 INFO L130 PetriNetUnfolder]: 0/902 cut-off events. [2022-11-02 20:45:51,526 INFO L131 PetriNetUnfolder]: For 1377/1377 co-relation queries the response was YES. [2022-11-02 20:45:51,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1537 conditions, 902 events. 0/902 cut-off events. For 1377/1377 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2247 event pairs, 0 based on Foata normal form. 10/912 useless extension candidates. Maximal degree in co-relation 0. Up to 44 conditions per place. [2022-11-02 20:45:51,527 INFO L137 encePairwiseOnDemand]: 857/862 looper letters, 75 selfloop transitions, 73 changer transitions 0/808 dead transitions. [2022-11-02 20:45:51,527 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 899 places, 808 transitions, 2772 flow [2022-11-02 20:45:51,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-11-02 20:45:51,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-11-02 20:45:51,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 51233 transitions. [2022-11-02 20:45:51,548 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7924671307037896 [2022-11-02 20:45:51,548 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 51233 transitions. [2022-11-02 20:45:51,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 51233 transitions. [2022-11-02 20:45:51,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:45:51,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 51233 transitions. [2022-11-02 20:45:51,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 683.1066666666667) internal successors, (51233), 75 states have internal predecessors, (51233), 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 20:45:51,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 862.0) internal successors, (65512), 76 states have internal predecessors, (65512), 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 20:45:51,618 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 862.0) internal successors, (65512), 76 states have internal predecessors, (65512), 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 20:45:51,618 INFO L175 Difference]: Start difference. First operand has 836 places, 747 transitions, 1986 flow. Second operand 75 states and 51233 transitions. [2022-11-02 20:45:51,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 899 places, 808 transitions, 2772 flow [2022-11-02 20:45:51,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 866 places, 808 transitions, 2571 flow, removed 19 selfloop flow, removed 33 redundant places. [2022-11-02 20:45:51,635 INFO L231 Difference]: Finished difference. Result has 866 places, 763 transitions, 2175 flow [2022-11-02 20:45:51,635 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=862, PETRI_DIFFERENCE_MINUEND_FLOW=1822, PETRI_DIFFERENCE_MINUEND_PLACES=792, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=690, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=2175, PETRI_PLACES=866, PETRI_TRANSITIONS=763} [2022-11-02 20:45:51,636 INFO L287 CegarLoopForPetriNet]: 763 programPoint places, 103 predicate places. [2022-11-02 20:45:51,636 INFO L495 AbstractCegarLoop]: Abstraction has has 866 places, 763 transitions, 2175 flow [2022-11-02 20:45:51,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 683.8939393939394) internal successors, (45137), 66 states have internal predecessors, (45137), 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 20:45:51,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:51,641 INFO L208 CegarLoopForPetriNet]: trace histogram [25, 25, 25, 25, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:45:51,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-11-02 20:45:51,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:51,855 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:45:51,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:51,855 INFO L85 PathProgramCache]: Analyzing trace with hash 488055662, now seen corresponding path program 1 times [2022-11-02 20:45:51,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:51,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341689833] [2022-11-02 20:45:51,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:51,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:51,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:45:51,896 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:45:51,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:45:51,970 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:45:51,971 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:45:51,971 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:45:51,971 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:45:51,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2022-11-02 20:45:51,971 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:45:51,972 WARN L233 ceAbstractionStarter]: 24 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:45:51,972 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 25 thread instances. [2022-11-02 20:45:52,051 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:45:52,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 792 places, 895 transitions, 2515 flow [2022-11-02 20:45:52,877 INFO L130 PetriNetUnfolder]: 254/1790 cut-off events. [2022-11-02 20:45:52,878 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2022-11-02 20:45:53,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2191 conditions, 1790 events. 254/1790 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 6586 event pairs, 0 based on Foata normal form. 0/1484 useless extension candidates. Maximal degree in co-relation 2066. Up to 52 conditions per place. [2022-11-02 20:45:53,036 INFO L82 GeneralOperation]: Start removeDead. Operand has 792 places, 895 transitions, 2515 flow [2022-11-02 20:45:53,086 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 792 places, 895 transitions, 2515 flow [2022-11-02 20:45:53,086 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:45:53,087 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;@4e0ca16a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:45:53,087 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:45:53,090 INFO L130 PetriNetUnfolder]: 3/75 cut-off events. [2022-11-02 20:45:53,091 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:45:53,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:53,091 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] [2022-11-02 20:45:53,091 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:45:53,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:53,091 INFO L85 PathProgramCache]: Analyzing trace with hash 180318754, now seen corresponding path program 1 times [2022-11-02 20:45:53,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:53,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840469715] [2022-11-02 20:45:53,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:53,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:53,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:53,113 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 20:45:53,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:53,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840469715] [2022-11-02 20:45:53,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840469715] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:45:53,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:45:53,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:45:53,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168682589] [2022-11-02 20:45:53,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:45:53,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:45:53,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:53,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:45:53,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:45:53,117 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 708 out of 895 [2022-11-02 20:45:53,118 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 792 places, 895 transitions, 2515 flow. Second operand has 3 states, 3 states have (on average 709.0) internal successors, (2127), 3 states have internal predecessors, (2127), 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 20:45:53,118 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:45:53,118 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 708 of 895 [2022-11-02 20:45:53,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:45:54,078 INFO L130 PetriNetUnfolder]: 0/1488 cut-off events. [2022-11-02 20:45:54,078 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2022-11-02 20:45:54,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2044 conditions, 1488 events. 0/1488 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 6075 event pairs, 0 based on Foata normal form. 10799/12237 useless extension candidates. Maximal degree in co-relation 0. Up to 150 conditions per place. [2022-11-02 20:45:54,080 INFO L137 encePairwiseOnDemand]: 738/895 looper letters, 34 selfloop transitions, 2 changer transitions 11/744 dead transitions. [2022-11-02 20:45:54,081 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 793 places, 744 transitions, 2285 flow [2022-11-02 20:45:54,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:45:54,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:45:54,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2322 transitions. [2022-11-02 20:45:54,083 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.864804469273743 [2022-11-02 20:45:54,083 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2322 transitions. [2022-11-02 20:45:54,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2322 transitions. [2022-11-02 20:45:54,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:45:54,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2322 transitions. [2022-11-02 20:45:54,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 774.0) internal successors, (2322), 3 states have internal predecessors, (2322), 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 20:45:54,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 895.0) internal successors, (3580), 4 states have internal predecessors, (3580), 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 20:45:54,086 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 895.0) internal successors, (3580), 4 states have internal predecessors, (3580), 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 20:45:54,086 INFO L175 Difference]: Start difference. First operand has 792 places, 895 transitions, 2515 flow. Second operand 3 states and 2322 transitions. [2022-11-02 20:45:54,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 793 places, 744 transitions, 2285 flow [2022-11-02 20:45:54,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 793 places, 744 transitions, 1685 flow, removed 300 selfloop flow, removed 0 redundant places. [2022-11-02 20:45:54,099 INFO L231 Difference]: Finished difference. Result has 794 places, 730 transitions, 1595 flow [2022-11-02 20:45:54,099 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=895, PETRI_DIFFERENCE_MINUEND_FLOW=1605, PETRI_DIFFERENCE_MINUEND_PLACES=791, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=740, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=738, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1595, PETRI_PLACES=794, PETRI_TRANSITIONS=730} [2022-11-02 20:45:54,100 INFO L287 CegarLoopForPetriNet]: 792 programPoint places, 2 predicate places. [2022-11-02 20:45:54,100 INFO L495 AbstractCegarLoop]: Abstraction has has 794 places, 730 transitions, 1595 flow [2022-11-02 20:45:54,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 709.0) internal successors, (2127), 3 states have internal predecessors, (2127), 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 20:45:54,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:54,100 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] [2022-11-02 20:45:54,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2022-11-02 20:45:54,101 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:45:54,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:54,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1827379178, now seen corresponding path program 1 times [2022-11-02 20:45:54,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:54,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233776816] [2022-11-02 20:45:54,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:54,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:54,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:54,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:54,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:54,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233776816] [2022-11-02 20:45:54,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233776816] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:45:54,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610480744] [2022-11-02 20:45:54,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:54,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:54,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:54,150 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:45:54,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-11-02 20:45:54,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:54,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:45:54,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:45:54,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:54,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:45:54,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:54,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610480744] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:45:54,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:45:54,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:45:54,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003797648] [2022-11-02 20:45:54,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:45:54,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:45:54,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:54,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:45:54,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:45:54,842 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 707 out of 895 [2022-11-02 20:45:54,844 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 794 places, 730 transitions, 1595 flow. Second operand has 10 states, 10 states have (on average 709.3) internal successors, (7093), 10 states have internal predecessors, (7093), 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 20:45:54,845 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:45:54,845 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 707 of 895 [2022-11-02 20:45:54,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:45:55,696 INFO L130 PetriNetUnfolder]: 0/1191 cut-off events. [2022-11-02 20:45:55,696 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2022-11-02 20:45:55,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1522 conditions, 1191 events. 0/1191 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3982 event pairs, 0 based on Foata normal form. 2/1193 useless extension candidates. Maximal degree in co-relation 0. Up to 95 conditions per place. [2022-11-02 20:45:55,699 INFO L137 encePairwiseOnDemand]: 889/895 looper letters, 35 selfloop transitions, 9 changer transitions 0/740 dead transitions. [2022-11-02 20:45:55,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 791 places, 740 transitions, 1705 flow [2022-11-02 20:45:55,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:45:55,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:45:55,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 6409 transitions. [2022-11-02 20:45:55,704 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7956548727498448 [2022-11-02 20:45:55,704 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 6409 transitions. [2022-11-02 20:45:55,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 6409 transitions. [2022-11-02 20:45:55,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:45:55,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 6409 transitions. [2022-11-02 20:45:55,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 712.1111111111111) internal successors, (6409), 9 states have internal predecessors, (6409), 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 20:45:55,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 895.0) internal successors, (8950), 10 states have internal predecessors, (8950), 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 20:45:55,717 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 895.0) internal successors, (8950), 10 states have internal predecessors, (8950), 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 20:45:55,717 INFO L175 Difference]: Start difference. First operand has 794 places, 730 transitions, 1595 flow. Second operand 9 states and 6409 transitions. [2022-11-02 20:45:55,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 791 places, 740 transitions, 1705 flow [2022-11-02 20:45:55,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 790 places, 740 transitions, 1703 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:45:55,725 INFO L231 Difference]: Finished difference. Result has 793 places, 736 transitions, 1643 flow [2022-11-02 20:45:55,725 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=895, PETRI_DIFFERENCE_MINUEND_FLOW=1593, PETRI_DIFFERENCE_MINUEND_PLACES=782, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=724, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1643, PETRI_PLACES=793, PETRI_TRANSITIONS=736} [2022-11-02 20:45:55,725 INFO L287 CegarLoopForPetriNet]: 792 programPoint places, 1 predicate places. [2022-11-02 20:45:55,725 INFO L495 AbstractCegarLoop]: Abstraction has has 793 places, 736 transitions, 1643 flow [2022-11-02 20:45:55,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 709.3) internal successors, (7093), 10 states have internal predecessors, (7093), 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 20:45:55,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:55,726 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:45:55,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-11-02 20:45:55,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-11-02 20:45:55,927 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:45:55,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:55,927 INFO L85 PathProgramCache]: Analyzing trace with hash -517161535, now seen corresponding path program 1 times [2022-11-02 20:45:55,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:55,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537108639] [2022-11-02 20:45:55,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:55,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:55,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:56,007 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:56,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:56,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537108639] [2022-11-02 20:45:56,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537108639] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:45:56,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485337687] [2022-11-02 20:45:56,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:56,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:56,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:56,009 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:45:56,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-11-02 20:45:56,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:56,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:45:56,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:45:56,738 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:56,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:45:56,833 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:56,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485337687] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:45:56,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:45:56,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:45:56,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639515246] [2022-11-02 20:45:56,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:45:56,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:45:56,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:56,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:45:56,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:45:56,843 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 707 out of 895 [2022-11-02 20:45:56,850 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 793 places, 736 transitions, 1643 flow. Second operand has 18 states, 18 states have (on average 709.6111111111111) internal successors, (12773), 18 states have internal predecessors, (12773), 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 20:45:56,850 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:45:56,850 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 707 of 895 [2022-11-02 20:45:56,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:45:57,837 INFO L130 PetriNetUnfolder]: 0/1147 cut-off events. [2022-11-02 20:45:57,837 INFO L131 PetriNetUnfolder]: For 144/144 co-relation queries the response was YES. [2022-11-02 20:45:57,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1659 conditions, 1147 events. 0/1147 cut-off events. For 144/144 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3713 event pairs, 0 based on Foata normal form. 4/1151 useless extension candidates. Maximal degree in co-relation 0. Up to 79 conditions per place. [2022-11-02 20:45:57,839 INFO L137 encePairwiseOnDemand]: 889/895 looper letters, 43 selfloop transitions, 21 changer transitions 0/760 dead transitions. [2022-11-02 20:45:57,840 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 813 places, 760 transitions, 1879 flow [2022-11-02 20:45:57,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:45:57,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:45:57,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 14915 transitions. [2022-11-02 20:45:57,849 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7935621175844639 [2022-11-02 20:45:57,849 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 14915 transitions. [2022-11-02 20:45:57,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 14915 transitions. [2022-11-02 20:45:57,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:45:57,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 14915 transitions. [2022-11-02 20:45:57,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 710.2380952380952) internal successors, (14915), 21 states have internal predecessors, (14915), 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 20:45:57,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 895.0) internal successors, (19690), 22 states have internal predecessors, (19690), 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 20:45:57,872 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 895.0) internal successors, (19690), 22 states have internal predecessors, (19690), 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 20:45:57,872 INFO L175 Difference]: Start difference. First operand has 793 places, 736 transitions, 1643 flow. Second operand 21 states and 14915 transitions. [2022-11-02 20:45:57,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 813 places, 760 transitions, 1879 flow [2022-11-02 20:45:57,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 812 places, 760 transitions, 1865 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:45:57,883 INFO L231 Difference]: Finished difference. Result has 817 places, 749 transitions, 1767 flow [2022-11-02 20:45:57,883 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=895, PETRI_DIFFERENCE_MINUEND_FLOW=1637, PETRI_DIFFERENCE_MINUEND_PLACES=792, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=725, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1767, PETRI_PLACES=817, PETRI_TRANSITIONS=749} [2022-11-02 20:45:57,884 INFO L287 CegarLoopForPetriNet]: 792 programPoint places, 25 predicate places. [2022-11-02 20:45:57,884 INFO L495 AbstractCegarLoop]: Abstraction has has 817 places, 749 transitions, 1767 flow [2022-11-02 20:45:57,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 709.6111111111111) internal successors, (12773), 18 states have internal predecessors, (12773), 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 20:45:57,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:57,885 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:45:57,914 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-11-02 20:45:58,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-11-02 20:45:58,086 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:45:58,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:58,086 INFO L85 PathProgramCache]: Analyzing trace with hash 343952675, now seen corresponding path program 1 times [2022-11-02 20:45:58,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:58,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434335527] [2022-11-02 20:45:58,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:58,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:58,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:58,284 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:58,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:58,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434335527] [2022-11-02 20:45:58,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434335527] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:45:58,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222720786] [2022-11-02 20:45:58,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:58,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:58,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:58,286 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:45:58,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-11-02 20:45:58,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:58,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:45:58,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:45:59,048 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:59,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:45:59,331 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:59,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222720786] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:45:59,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:45:59,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-02 20:45:59,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263174170] [2022-11-02 20:45:59,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:45:59,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:45:59,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:59,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:45:59,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:45:59,344 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 707 out of 895 [2022-11-02 20:45:59,351 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 817 places, 749 transitions, 1767 flow. Second operand has 34 states, 34 states have (on average 709.7941176470588) internal successors, (24133), 34 states have internal predecessors, (24133), 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 20:45:59,351 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:45:59,351 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 707 of 895 [2022-11-02 20:45:59,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:46:00,707 INFO L130 PetriNetUnfolder]: 0/1059 cut-off events. [2022-11-02 20:46:00,707 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2022-11-02 20:46:00,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1704 conditions, 1059 events. 0/1059 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3118 event pairs, 0 based on Foata normal form. 8/1067 useless extension candidates. Maximal degree in co-relation 0. Up to 47 conditions per place. [2022-11-02 20:46:00,709 INFO L137 encePairwiseOnDemand]: 889/895 looper letters, 59 selfloop transitions, 45 changer transitions 0/800 dead transitions. [2022-11-02 20:46:00,709 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 861 places, 800 transitions, 2291 flow [2022-11-02 20:46:00,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-02 20:46:00,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-02 20:46:00,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 31927 transitions. [2022-11-02 20:46:00,725 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7927250155183116 [2022-11-02 20:46:00,725 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 31927 transitions. [2022-11-02 20:46:00,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 31927 transitions. [2022-11-02 20:46:00,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:46:00,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 31927 transitions. [2022-11-02 20:46:00,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 709.4888888888889) internal successors, (31927), 45 states have internal predecessors, (31927), 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 20:46:00,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 895.0) internal successors, (41170), 46 states have internal predecessors, (41170), 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 20:46:00,771 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 895.0) internal successors, (41170), 46 states have internal predecessors, (41170), 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 20:46:00,771 INFO L175 Difference]: Start difference. First operand has 817 places, 749 transitions, 1767 flow. Second operand 45 states and 31927 transitions. [2022-11-02 20:46:00,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 861 places, 800 transitions, 2291 flow [2022-11-02 20:46:00,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 855 places, 800 transitions, 2251 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-02 20:46:00,781 INFO L231 Difference]: Finished difference. Result has 864 places, 774 transitions, 2045 flow [2022-11-02 20:46:00,782 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=895, PETRI_DIFFERENCE_MINUEND_FLOW=1743, PETRI_DIFFERENCE_MINUEND_PLACES=811, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=726, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2045, PETRI_PLACES=864, PETRI_TRANSITIONS=774} [2022-11-02 20:46:00,782 INFO L287 CegarLoopForPetriNet]: 792 programPoint places, 72 predicate places. [2022-11-02 20:46:00,782 INFO L495 AbstractCegarLoop]: Abstraction has has 864 places, 774 transitions, 2045 flow [2022-11-02 20:46:00,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 709.7941176470588) internal successors, (24133), 34 states have internal predecessors, (24133), 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 20:46:00,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:46:00,784 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:46:00,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-11-02 20:46:00,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-11-02 20:46:00,985 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:46:00,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:46:00,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1400019945, now seen corresponding path program 1 times [2022-11-02 20:46:00,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:46:00,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120705692] [2022-11-02 20:46:00,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:00,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:46:01,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:01,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:01,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:46:01,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120705692] [2022-11-02 20:46:01,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120705692] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:46:01,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056259831] [2022-11-02 20:46:01,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:01,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:46:01,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:46:01,611 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:46:01,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-11-02 20:46:02,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:02,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 20:46:02,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:46:02,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:02,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:46:03,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:03,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056259831] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:46:03,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:46:03,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-02 20:46:03,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284237335] [2022-11-02 20:46:03,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:46:03,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-02 20:46:03,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:46:03,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-02 20:46:03,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-02 20:46:03,605 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 707 out of 895 [2022-11-02 20:46:03,619 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 864 places, 774 transitions, 2045 flow. Second operand has 66 states, 66 states have (on average 709.8939393939394) internal successors, (46853), 66 states have internal predecessors, (46853), 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 20:46:03,619 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:46:03,619 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 707 of 895 [2022-11-02 20:46:03,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:46:05,857 INFO L130 PetriNetUnfolder]: 0/938 cut-off events. [2022-11-02 20:46:05,857 INFO L131 PetriNetUnfolder]: For 1498/1498 co-relation queries the response was YES. [2022-11-02 20:46:05,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1599 conditions, 938 events. 0/938 cut-off events. For 1498/1498 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2345 event pairs, 0 based on Foata normal form. 11/949 useless extension candidates. Maximal degree in co-relation 0. Up to 46 conditions per place. [2022-11-02 20:46:05,858 INFO L137 encePairwiseOnDemand]: 890/895 looper letters, 78 selfloop transitions, 76 changer transitions 0/840 dead transitions. [2022-11-02 20:46:05,858 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 930 places, 840 transitions, 2887 flow [2022-11-02 20:46:05,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-11-02 20:46:05,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2022-11-02 20:46:05,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 55311 transitions. [2022-11-02 20:46:05,882 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7923076923076923 [2022-11-02 20:46:05,882 INFO L72 ComplementDD]: Start complementDD. Operand 78 states and 55311 transitions. [2022-11-02 20:46:05,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 78 states and 55311 transitions. [2022-11-02 20:46:05,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:46:05,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 78 states and 55311 transitions. [2022-11-02 20:46:05,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 79 states, 78 states have (on average 709.1153846153846) internal successors, (55311), 78 states have internal predecessors, (55311), 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 20:46:05,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 79 states, 79 states have (on average 895.0) internal successors, (70705), 79 states have internal predecessors, (70705), 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 20:46:05,972 INFO L81 ComplementDD]: Finished complementDD. Result has 79 states, 79 states have (on average 895.0) internal successors, (70705), 79 states have internal predecessors, (70705), 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 20:46:05,972 INFO L175 Difference]: Start difference. First operand has 864 places, 774 transitions, 2045 flow. Second operand 78 states and 55311 transitions. [2022-11-02 20:46:05,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 930 places, 840 transitions, 2887 flow [2022-11-02 20:46:05,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 897 places, 840 transitions, 2678 flow, removed 20 selfloop flow, removed 33 redundant places. [2022-11-02 20:46:05,985 INFO L231 Difference]: Finished difference. Result has 897 places, 793 transitions, 2263 flow [2022-11-02 20:46:05,985 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=895, PETRI_DIFFERENCE_MINUEND_FLOW=1881, PETRI_DIFFERENCE_MINUEND_PLACES=820, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=763, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=717, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=2263, PETRI_PLACES=897, PETRI_TRANSITIONS=793} [2022-11-02 20:46:05,986 INFO L287 CegarLoopForPetriNet]: 792 programPoint places, 105 predicate places. [2022-11-02 20:46:05,986 INFO L495 AbstractCegarLoop]: Abstraction has has 897 places, 793 transitions, 2263 flow [2022-11-02 20:46:05,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 709.8939393939394) internal successors, (46853), 66 states have internal predecessors, (46853), 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 20:46:05,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:46:05,990 INFO L208 CegarLoopForPetriNet]: trace histogram [26, 26, 26, 26, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:46:06,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-11-02 20:46:06,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-11-02 20:46:06,191 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:46:06,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:46:06,191 INFO L85 PathProgramCache]: Analyzing trace with hash -906765510, now seen corresponding path program 1 times [2022-11-02 20:46:06,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:46:06,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798755628] [2022-11-02 20:46:06,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:06,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:46:06,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:46:06,228 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:46:06,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:46:06,307 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:46:06,308 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:46:06,308 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:46:06,308 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:46:06,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2022-11-02 20:46:06,308 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-02 20:46:06,309 WARN L233 ceAbstractionStarter]: 25 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:46:06,309 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 26 thread instances. [2022-11-02 20:46:06,383 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:46:06,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 821 places, 928 transitions, 2636 flow [2022-11-02 20:46:07,429 INFO L130 PetriNetUnfolder]: 264/1859 cut-off events. [2022-11-02 20:46:07,429 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2022-11-02 20:46:07,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2289 conditions, 1859 events. 264/1859 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 6769 event pairs, 0 based on Foata normal form. 0/1541 useless extension candidates. Maximal degree in co-relation 2163. Up to 54 conditions per place. [2022-11-02 20:46:07,576 INFO L82 GeneralOperation]: Start removeDead. Operand has 821 places, 928 transitions, 2636 flow [2022-11-02 20:46:07,616 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 821 places, 928 transitions, 2636 flow [2022-11-02 20:46:07,616 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:46:07,617 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;@4e0ca16a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:46:07,617 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:46:07,621 INFO L130 PetriNetUnfolder]: 5/82 cut-off events. [2022-11-02 20:46:07,621 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:46:07,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:46:07,621 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] [2022-11-02 20:46:07,621 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:46:07,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:46:07,621 INFO L85 PathProgramCache]: Analyzing trace with hash 542009890, now seen corresponding path program 1 times [2022-11-02 20:46:07,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:46:07,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816092171] [2022-11-02 20:46:07,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:07,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:46:07,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:07,645 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 20:46:07,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:46:07,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816092171] [2022-11-02 20:46:07,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816092171] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:46:07,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:46:07,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:46:07,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396697439] [2022-11-02 20:46:07,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:46:07,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:46:07,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:46:07,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:46:07,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:46:07,649 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 734 out of 928 [2022-11-02 20:46:07,650 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 821 places, 928 transitions, 2636 flow. Second operand has 3 states, 3 states have (on average 735.0) internal successors, (2205), 3 states have internal predecessors, (2205), 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 20:46:07,650 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:46:07,650 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 734 of 928 [2022-11-02 20:46:07,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:46:08,579 INFO L130 PetriNetUnfolder]: 0/1546 cut-off events. [2022-11-02 20:46:08,579 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2022-11-02 20:46:08,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2137 conditions, 1546 events. 0/1546 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 6326 event pairs, 0 based on Foata normal form. 11698/13192 useless extension candidates. Maximal degree in co-relation 0. Up to 156 conditions per place. [2022-11-02 20:46:08,582 INFO L137 encePairwiseOnDemand]: 765/928 looper letters, 35 selfloop transitions, 2 changer transitions 11/771 dead transitions. [2022-11-02 20:46:08,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 822 places, 771 transitions, 2396 flow [2022-11-02 20:46:08,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:46:08,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:46:08,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2407 transitions. [2022-11-02 20:46:08,584 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8645833333333334 [2022-11-02 20:46:08,584 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2407 transitions. [2022-11-02 20:46:08,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2407 transitions. [2022-11-02 20:46:08,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:46:08,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2407 transitions. [2022-11-02 20:46:08,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 802.3333333333334) internal successors, (2407), 3 states have internal predecessors, (2407), 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 20:46:08,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 928.0) internal successors, (3712), 4 states have internal predecessors, (3712), 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 20:46:08,588 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 928.0) internal successors, (3712), 4 states have internal predecessors, (3712), 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 20:46:08,588 INFO L175 Difference]: Start difference. First operand has 821 places, 928 transitions, 2636 flow. Second operand 3 states and 2407 transitions. [2022-11-02 20:46:08,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 822 places, 771 transitions, 2396 flow [2022-11-02 20:46:08,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 822 places, 771 transitions, 1746 flow, removed 325 selfloop flow, removed 0 redundant places. [2022-11-02 20:46:08,601 INFO L231 Difference]: Finished difference. Result has 823 places, 757 transitions, 1654 flow [2022-11-02 20:46:08,601 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=928, PETRI_DIFFERENCE_MINUEND_FLOW=1664, PETRI_DIFFERENCE_MINUEND_PLACES=820, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=767, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=765, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1654, PETRI_PLACES=823, PETRI_TRANSITIONS=757} [2022-11-02 20:46:08,602 INFO L287 CegarLoopForPetriNet]: 821 programPoint places, 2 predicate places. [2022-11-02 20:46:08,602 INFO L495 AbstractCegarLoop]: Abstraction has has 823 places, 757 transitions, 1654 flow [2022-11-02 20:46:08,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 735.0) internal successors, (2205), 3 states have internal predecessors, (2205), 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 20:46:08,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:46:08,603 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] [2022-11-02 20:46:08,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2022-11-02 20:46:08,603 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:46:08,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:46:08,604 INFO L85 PathProgramCache]: Analyzing trace with hash -351706058, now seen corresponding path program 1 times [2022-11-02 20:46:08,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:46:08,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773533486] [2022-11-02 20:46:08,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:08,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:46:08,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:08,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:08,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:46:08,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773533486] [2022-11-02 20:46:08,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773533486] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:46:08,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415407982] [2022-11-02 20:46:08,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:08,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:46:08,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:46:08,659 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:46:08,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-11-02 20:46:09,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:09,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:46:09,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:46:09,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:09,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:46:09,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:09,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415407982] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:46:09,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:46:09,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:46:09,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941421973] [2022-11-02 20:46:09,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:46:09,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:46:09,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:46:09,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:46:09,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:46:09,433 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 733 out of 928 [2022-11-02 20:46:09,435 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 823 places, 757 transitions, 1654 flow. Second operand has 10 states, 10 states have (on average 735.3) internal successors, (7353), 10 states have internal predecessors, (7353), 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 20:46:09,435 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:46:09,435 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 733 of 928 [2022-11-02 20:46:09,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:46:10,281 INFO L130 PetriNetUnfolder]: 0/1238 cut-off events. [2022-11-02 20:46:10,282 INFO L131 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-11-02 20:46:10,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1582 conditions, 1238 events. 0/1238 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4176 event pairs, 0 based on Foata normal form. 2/1240 useless extension candidates. Maximal degree in co-relation 0. Up to 99 conditions per place. [2022-11-02 20:46:10,284 INFO L137 encePairwiseOnDemand]: 922/928 looper letters, 36 selfloop transitions, 9 changer transitions 0/767 dead transitions. [2022-11-02 20:46:10,284 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 820 places, 767 transitions, 1766 flow [2022-11-02 20:46:10,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:46:10,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:46:10,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 6644 transitions. [2022-11-02 20:46:10,289 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7954980842911877 [2022-11-02 20:46:10,289 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 6644 transitions. [2022-11-02 20:46:10,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 6644 transitions. [2022-11-02 20:46:10,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:46:10,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 6644 transitions. [2022-11-02 20:46:10,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 738.2222222222222) internal successors, (6644), 9 states have internal predecessors, (6644), 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 20:46:10,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 928.0) internal successors, (9280), 10 states have internal predecessors, (9280), 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 20:46:10,298 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 928.0) internal successors, (9280), 10 states have internal predecessors, (9280), 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 20:46:10,298 INFO L175 Difference]: Start difference. First operand has 823 places, 757 transitions, 1654 flow. Second operand 9 states and 6644 transitions. [2022-11-02 20:46:10,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 820 places, 767 transitions, 1766 flow [2022-11-02 20:46:10,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 819 places, 767 transitions, 1764 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:46:10,306 INFO L231 Difference]: Finished difference. Result has 822 places, 763 transitions, 1702 flow [2022-11-02 20:46:10,307 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=928, PETRI_DIFFERENCE_MINUEND_FLOW=1652, PETRI_DIFFERENCE_MINUEND_PLACES=811, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=757, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=751, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1702, PETRI_PLACES=822, PETRI_TRANSITIONS=763} [2022-11-02 20:46:10,307 INFO L287 CegarLoopForPetriNet]: 821 programPoint places, 1 predicate places. [2022-11-02 20:46:10,307 INFO L495 AbstractCegarLoop]: Abstraction has has 822 places, 763 transitions, 1702 flow [2022-11-02 20:46:10,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 735.3) internal successors, (7353), 10 states have internal predecessors, (7353), 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 20:46:10,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:46:10,308 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:46:10,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-11-02 20:46:10,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:46:10,509 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:46:10,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:46:10,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1841547809, now seen corresponding path program 1 times [2022-11-02 20:46:10,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:46:10,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869130065] [2022-11-02 20:46:10,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:10,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:46:10,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:10,580 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:10,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:46:10,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869130065] [2022-11-02 20:46:10,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869130065] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:46:10,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110045383] [2022-11-02 20:46:10,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:10,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:46:10,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:46:10,582 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:46:10,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-11-02 20:46:11,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:11,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:46:11,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:46:11,350 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:11,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:46:11,440 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:11,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110045383] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:46:11,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:46:11,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:46:11,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810972005] [2022-11-02 20:46:11,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:46:11,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:46:11,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:46:11,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:46:11,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:46:11,450 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 733 out of 928 [2022-11-02 20:46:11,454 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 822 places, 763 transitions, 1702 flow. Second operand has 18 states, 18 states have (on average 735.6111111111111) internal successors, (13241), 18 states have internal predecessors, (13241), 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 20:46:11,454 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:46:11,454 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 733 of 928 [2022-11-02 20:46:11,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:46:12,483 INFO L130 PetriNetUnfolder]: 0/1194 cut-off events. [2022-11-02 20:46:12,483 INFO L131 PetriNetUnfolder]: For 150/150 co-relation queries the response was YES. [2022-11-02 20:46:12,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1727 conditions, 1194 events. 0/1194 cut-off events. For 150/150 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3864 event pairs, 0 based on Foata normal form. 4/1198 useless extension candidates. Maximal degree in co-relation 0. Up to 83 conditions per place. [2022-11-02 20:46:12,486 INFO L137 encePairwiseOnDemand]: 922/928 looper letters, 44 selfloop transitions, 21 changer transitions 0/787 dead transitions. [2022-11-02 20:46:12,486 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 842 places, 787 transitions, 1940 flow [2022-11-02 20:46:12,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:46:12,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:46:12,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 15462 transitions. [2022-11-02 20:46:12,496 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7934113300492611 [2022-11-02 20:46:12,496 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 15462 transitions. [2022-11-02 20:46:12,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 15462 transitions. [2022-11-02 20:46:12,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:46:12,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 15462 transitions. [2022-11-02 20:46:12,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 736.2857142857143) internal successors, (15462), 21 states have internal predecessors, (15462), 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 20:46:12,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 928.0) internal successors, (20416), 22 states have internal predecessors, (20416), 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 20:46:12,518 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 928.0) internal successors, (20416), 22 states have internal predecessors, (20416), 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 20:46:12,518 INFO L175 Difference]: Start difference. First operand has 822 places, 763 transitions, 1702 flow. Second operand 21 states and 15462 transitions. [2022-11-02 20:46:12,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 842 places, 787 transitions, 1940 flow [2022-11-02 20:46:12,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 841 places, 787 transitions, 1926 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:46:12,531 INFO L231 Difference]: Finished difference. Result has 846 places, 776 transitions, 1826 flow [2022-11-02 20:46:12,531 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=928, PETRI_DIFFERENCE_MINUEND_FLOW=1696, PETRI_DIFFERENCE_MINUEND_PLACES=821, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=763, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=752, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1826, PETRI_PLACES=846, PETRI_TRANSITIONS=776} [2022-11-02 20:46:12,531 INFO L287 CegarLoopForPetriNet]: 821 programPoint places, 25 predicate places. [2022-11-02 20:46:12,531 INFO L495 AbstractCegarLoop]: Abstraction has has 846 places, 776 transitions, 1826 flow [2022-11-02 20:46:12,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 735.6111111111111) internal successors, (13241), 18 states have internal predecessors, (13241), 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 20:46:12,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:46:12,533 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:46:12,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-11-02 20:46:12,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:46:12,734 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:46:12,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:46:12,734 INFO L85 PathProgramCache]: Analyzing trace with hash 2074843651, now seen corresponding path program 1 times [2022-11-02 20:46:12,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:46:12,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463907041] [2022-11-02 20:46:12,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:12,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:46:12,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:12,918 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:12,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:46:12,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463907041] [2022-11-02 20:46:12,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463907041] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:46:12,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493128215] [2022-11-02 20:46:12,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:12,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:46:12,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:46:12,923 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:46:12,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-11-02 20:46:13,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:13,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:46:13,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:46:13,777 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:13,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:46:14,096 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:14,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493128215] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:46:14,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:46:14,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-02 20:46:14,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944858724] [2022-11-02 20:46:14,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:46:14,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:46:14,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:46:14,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:46:14,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:46:14,110 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 733 out of 928 [2022-11-02 20:46:14,118 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 846 places, 776 transitions, 1826 flow. Second operand has 34 states, 34 states have (on average 735.7941176470588) internal successors, (25017), 34 states have internal predecessors, (25017), 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 20:46:14,118 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:46:14,118 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 733 of 928 [2022-11-02 20:46:14,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:46:15,615 INFO L130 PetriNetUnfolder]: 0/1106 cut-off events. [2022-11-02 20:46:15,615 INFO L131 PetriNetUnfolder]: For 573/573 co-relation queries the response was YES. [2022-11-02 20:46:15,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1781 conditions, 1106 events. 0/1106 cut-off events. For 573/573 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3283 event pairs, 0 based on Foata normal form. 8/1114 useless extension candidates. Maximal degree in co-relation 0. Up to 51 conditions per place. [2022-11-02 20:46:15,617 INFO L137 encePairwiseOnDemand]: 922/928 looper letters, 60 selfloop transitions, 45 changer transitions 0/827 dead transitions. [2022-11-02 20:46:15,617 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 890 places, 827 transitions, 2352 flow [2022-11-02 20:46:15,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-02 20:46:15,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-02 20:46:15,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 33098 transitions. [2022-11-02 20:46:15,632 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7925766283524904 [2022-11-02 20:46:15,632 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 33098 transitions. [2022-11-02 20:46:15,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 33098 transitions. [2022-11-02 20:46:15,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:46:15,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 33098 transitions. [2022-11-02 20:46:15,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 735.5111111111111) internal successors, (33098), 45 states have internal predecessors, (33098), 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 20:46:15,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 928.0) internal successors, (42688), 46 states have internal predecessors, (42688), 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 20:46:15,693 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 928.0) internal successors, (42688), 46 states have internal predecessors, (42688), 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 20:46:15,693 INFO L175 Difference]: Start difference. First operand has 846 places, 776 transitions, 1826 flow. Second operand 45 states and 33098 transitions. [2022-11-02 20:46:15,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 890 places, 827 transitions, 2352 flow [2022-11-02 20:46:15,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 884 places, 827 transitions, 2312 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-02 20:46:15,705 INFO L231 Difference]: Finished difference. Result has 893 places, 801 transitions, 2104 flow [2022-11-02 20:46:15,705 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=928, PETRI_DIFFERENCE_MINUEND_FLOW=1802, PETRI_DIFFERENCE_MINUEND_PLACES=840, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=776, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=753, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2104, PETRI_PLACES=893, PETRI_TRANSITIONS=801} [2022-11-02 20:46:15,705 INFO L287 CegarLoopForPetriNet]: 821 programPoint places, 72 predicate places. [2022-11-02 20:46:15,705 INFO L495 AbstractCegarLoop]: Abstraction has has 893 places, 801 transitions, 2104 flow [2022-11-02 20:46:15,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 735.7941176470588) internal successors, (25017), 34 states have internal predecessors, (25017), 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 20:46:15,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:46:15,708 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:46:15,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-11-02 20:46:15,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:46:15,908 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:46:15,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:46:15,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1239527927, now seen corresponding path program 1 times [2022-11-02 20:46:15,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:46:15,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402480925] [2022-11-02 20:46:15,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:15,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:46:15,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:16,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:16,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:46:16,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402480925] [2022-11-02 20:46:16,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402480925] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:46:16,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415538981] [2022-11-02 20:46:16,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:16,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:46:16,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:46:16,540 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:46:16,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-11-02 20:46:17,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:17,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 20:46:17,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:46:17,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:17,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:46:18,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:18,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415538981] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:46:18,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:46:18,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-02 20:46:18,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781627203] [2022-11-02 20:46:18,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:46:18,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-02 20:46:18,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:46:18,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-02 20:46:18,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-02 20:46:18,497 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 733 out of 928 [2022-11-02 20:46:18,513 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 893 places, 801 transitions, 2104 flow. Second operand has 66 states, 66 states have (on average 735.8939393939394) internal successors, (48569), 66 states have internal predecessors, (48569), 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 20:46:18,513 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:46:18,513 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 733 of 928 [2022-11-02 20:46:18,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:46:21,013 INFO L130 PetriNetUnfolder]: 0/974 cut-off events. [2022-11-02 20:46:21,013 INFO L131 PetriNetUnfolder]: For 1619/1619 co-relation queries the response was YES. [2022-11-02 20:46:21,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1662 conditions, 974 events. 0/974 cut-off events. For 1619/1619 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2443 event pairs, 0 based on Foata normal form. 12/986 useless extension candidates. Maximal degree in co-relation 0. Up to 48 conditions per place. [2022-11-02 20:46:21,015 INFO L137 encePairwiseOnDemand]: 923/928 looper letters, 81 selfloop transitions, 79 changer transitions 0/872 dead transitions. [2022-11-02 20:46:21,016 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 962 places, 872 transitions, 3002 flow [2022-11-02 20:46:21,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-11-02 20:46:21,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2022-11-02 20:46:21,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 59545 transitions. [2022-11-02 20:46:21,063 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7921588974031503 [2022-11-02 20:46:21,063 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 59545 transitions. [2022-11-02 20:46:21,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 59545 transitions. [2022-11-02 20:46:21,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:46:21,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 59545 transitions. [2022-11-02 20:46:21,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 735.1234567901234) internal successors, (59545), 81 states have internal predecessors, (59545), 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 20:46:21,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 928.0) internal successors, (76096), 82 states have internal predecessors, (76096), 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 20:46:21,198 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 928.0) internal successors, (76096), 82 states have internal predecessors, (76096), 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 20:46:21,198 INFO L175 Difference]: Start difference. First operand has 893 places, 801 transitions, 2104 flow. Second operand 81 states and 59545 transitions. [2022-11-02 20:46:21,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 962 places, 872 transitions, 3002 flow [2022-11-02 20:46:21,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 929 places, 872 transitions, 2785 flow, removed 21 selfloop flow, removed 33 redundant places. [2022-11-02 20:46:21,210 INFO L231 Difference]: Finished difference. Result has 929 places, 823 transitions, 2351 flow [2022-11-02 20:46:21,211 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=928, PETRI_DIFFERENCE_MINUEND_FLOW=1940, PETRI_DIFFERENCE_MINUEND_PLACES=849, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=790, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=744, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=2351, PETRI_PLACES=929, PETRI_TRANSITIONS=823} [2022-11-02 20:46:21,211 INFO L287 CegarLoopForPetriNet]: 821 programPoint places, 108 predicate places. [2022-11-02 20:46:21,211 INFO L495 AbstractCegarLoop]: Abstraction has has 929 places, 823 transitions, 2351 flow [2022-11-02 20:46:21,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 735.8939393939394) internal successors, (48569), 66 states have internal predecessors, (48569), 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 20:46:21,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:46:21,215 INFO L208 CegarLoopForPetriNet]: trace histogram [27, 27, 27, 27, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:46:21,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-11-02 20:46:21,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:46:21,416 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:46:21,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:46:21,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1409301607, now seen corresponding path program 1 times [2022-11-02 20:46:21,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:46:21,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543830119] [2022-11-02 20:46:21,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:21,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:46:21,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:46:21,455 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:46:21,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:46:21,531 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:46:21,531 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:46:21,531 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:46:21,531 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:46:21,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2022-11-02 20:46:21,532 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-02 20:46:21,532 WARN L233 ceAbstractionStarter]: 26 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:46:21,532 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 27 thread instances. [2022-11-02 20:46:21,603 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:46:21,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 850 places, 961 transitions, 2759 flow [2022-11-02 20:46:22,684 INFO L130 PetriNetUnfolder]: 274/1928 cut-off events. [2022-11-02 20:46:22,684 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2022-11-02 20:46:22,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2388 conditions, 1928 events. 274/1928 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 7037 event pairs, 0 based on Foata normal form. 0/1598 useless extension candidates. Maximal degree in co-relation 2261. Up to 56 conditions per place. [2022-11-02 20:46:22,844 INFO L82 GeneralOperation]: Start removeDead. Operand has 850 places, 961 transitions, 2759 flow [2022-11-02 20:46:22,898 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 850 places, 961 transitions, 2759 flow [2022-11-02 20:46:22,898 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:46:22,898 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;@4e0ca16a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:46:22,899 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:46:22,905 INFO L130 PetriNetUnfolder]: 2/73 cut-off events. [2022-11-02 20:46:22,905 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:46:22,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:46:22,906 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] [2022-11-02 20:46:22,906 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:46:22,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:46:22,906 INFO L85 PathProgramCache]: Analyzing trace with hash -967113502, now seen corresponding path program 1 times [2022-11-02 20:46:22,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:46:22,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648618984] [2022-11-02 20:46:22,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:22,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:46:22,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:22,937 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 20:46:22,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:46:22,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648618984] [2022-11-02 20:46:22,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648618984] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:46:22,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:46:22,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:46:22,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521154874] [2022-11-02 20:46:22,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:46:22,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:46:22,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:46:22,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:46:22,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:46:22,941 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 760 out of 961 [2022-11-02 20:46:22,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 850 places, 961 transitions, 2759 flow. Second operand has 3 states, 3 states have (on average 761.0) internal successors, (2283), 3 states have internal predecessors, (2283), 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 20:46:22,942 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:46:22,942 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 760 of 961 [2022-11-02 20:46:22,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:46:23,887 INFO L130 PetriNetUnfolder]: 0/1604 cut-off events. [2022-11-02 20:46:23,887 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2022-11-02 20:46:23,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2231 conditions, 1604 events. 0/1604 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 6577 event pairs, 0 based on Foata normal form. 12633/14183 useless extension candidates. Maximal degree in co-relation 0. Up to 162 conditions per place. [2022-11-02 20:46:23,890 INFO L137 encePairwiseOnDemand]: 792/961 looper letters, 36 selfloop transitions, 2 changer transitions 11/798 dead transitions. [2022-11-02 20:46:23,890 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 851 places, 798 transitions, 2509 flow [2022-11-02 20:46:23,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:46:23,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:46:23,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2492 transitions. [2022-11-02 20:46:23,893 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8643773846687478 [2022-11-02 20:46:23,893 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2492 transitions. [2022-11-02 20:46:23,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2492 transitions. [2022-11-02 20:46:23,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:46:23,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2492 transitions. [2022-11-02 20:46:23,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 830.6666666666666) internal successors, (2492), 3 states have internal predecessors, (2492), 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 20:46:23,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 961.0) internal successors, (3844), 4 states have internal predecessors, (3844), 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 20:46:23,896 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 961.0) internal successors, (3844), 4 states have internal predecessors, (3844), 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 20:46:23,896 INFO L175 Difference]: Start difference. First operand has 850 places, 961 transitions, 2759 flow. Second operand 3 states and 2492 transitions. [2022-11-02 20:46:23,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 851 places, 798 transitions, 2509 flow [2022-11-02 20:46:23,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 851 places, 798 transitions, 1807 flow, removed 351 selfloop flow, removed 0 redundant places. [2022-11-02 20:46:23,908 INFO L231 Difference]: Finished difference. Result has 852 places, 784 transitions, 1713 flow [2022-11-02 20:46:23,908 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=961, PETRI_DIFFERENCE_MINUEND_FLOW=1723, PETRI_DIFFERENCE_MINUEND_PLACES=849, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=794, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=792, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1713, PETRI_PLACES=852, PETRI_TRANSITIONS=784} [2022-11-02 20:46:23,909 INFO L287 CegarLoopForPetriNet]: 850 programPoint places, 2 predicate places. [2022-11-02 20:46:23,909 INFO L495 AbstractCegarLoop]: Abstraction has has 852 places, 784 transitions, 1713 flow [2022-11-02 20:46:23,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 761.0) internal successors, (2283), 3 states have internal predecessors, (2283), 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 20:46:23,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:46:23,909 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] [2022-11-02 20:46:23,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2022-11-02 20:46:23,909 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:46:23,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:46:23,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1978771530, now seen corresponding path program 1 times [2022-11-02 20:46:23,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:46:23,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132286681] [2022-11-02 20:46:23,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:23,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:46:23,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:23,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:23,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:46:23,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132286681] [2022-11-02 20:46:23,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132286681] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:46:23,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917726510] [2022-11-02 20:46:23,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:23,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:46:23,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:46:23,947 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:46:23,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-11-02 20:46:24,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:24,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:46:24,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:46:24,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:24,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:46:24,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:24,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917726510] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:46:24,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:46:24,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:46:24,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500482348] [2022-11-02 20:46:24,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:46:24,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:46:24,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:46:24,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:46:24,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:46:24,736 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 759 out of 961 [2022-11-02 20:46:24,739 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 852 places, 784 transitions, 1713 flow. Second operand has 10 states, 10 states have (on average 761.3) internal successors, (7613), 10 states have internal predecessors, (7613), 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 20:46:24,739 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:46:24,739 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 759 of 961 [2022-11-02 20:46:24,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:46:25,677 INFO L130 PetriNetUnfolder]: 0/1285 cut-off events. [2022-11-02 20:46:25,677 INFO L131 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2022-11-02 20:46:25,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1642 conditions, 1285 events. 0/1285 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4322 event pairs, 0 based on Foata normal form. 2/1287 useless extension candidates. Maximal degree in co-relation 0. Up to 103 conditions per place. [2022-11-02 20:46:25,680 INFO L137 encePairwiseOnDemand]: 955/961 looper letters, 37 selfloop transitions, 9 changer transitions 0/794 dead transitions. [2022-11-02 20:46:25,680 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 849 places, 794 transitions, 1827 flow [2022-11-02 20:46:25,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:46:25,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:46:25,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 6879 transitions. [2022-11-02 20:46:25,685 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7953520638224072 [2022-11-02 20:46:25,685 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 6879 transitions. [2022-11-02 20:46:25,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 6879 transitions. [2022-11-02 20:46:25,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:46:25,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 6879 transitions. [2022-11-02 20:46:25,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 764.3333333333334) internal successors, (6879), 9 states have internal predecessors, (6879), 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 20:46:25,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 961.0) internal successors, (9610), 10 states have internal predecessors, (9610), 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 20:46:25,695 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 961.0) internal successors, (9610), 10 states have internal predecessors, (9610), 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 20:46:25,695 INFO L175 Difference]: Start difference. First operand has 852 places, 784 transitions, 1713 flow. Second operand 9 states and 6879 transitions. [2022-11-02 20:46:25,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 849 places, 794 transitions, 1827 flow [2022-11-02 20:46:25,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 848 places, 794 transitions, 1825 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:46:25,704 INFO L231 Difference]: Finished difference. Result has 851 places, 790 transitions, 1761 flow [2022-11-02 20:46:25,704 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=961, PETRI_DIFFERENCE_MINUEND_FLOW=1711, PETRI_DIFFERENCE_MINUEND_PLACES=840, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=784, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=778, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1761, PETRI_PLACES=851, PETRI_TRANSITIONS=790} [2022-11-02 20:46:25,705 INFO L287 CegarLoopForPetriNet]: 850 programPoint places, 1 predicate places. [2022-11-02 20:46:25,705 INFO L495 AbstractCegarLoop]: Abstraction has has 851 places, 790 transitions, 1761 flow [2022-11-02 20:46:25,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 761.3) internal successors, (7613), 10 states have internal predecessors, (7613), 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 20:46:25,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:46:25,706 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:46:25,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-11-02 20:46:25,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-11-02 20:46:25,906 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:46:25,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:46:25,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1288544033, now seen corresponding path program 1 times [2022-11-02 20:46:25,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:46:25,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148500197] [2022-11-02 20:46:25,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:25,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:46:25,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:25,991 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:25,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:46:25,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148500197] [2022-11-02 20:46:25,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148500197] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:46:25,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322528250] [2022-11-02 20:46:25,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:25,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:46:25,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:46:25,993 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:46:25,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-11-02 20:46:26,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:26,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:46:26,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:46:26,780 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:26,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:46:26,868 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:26,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322528250] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:46:26,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:46:26,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:46:26,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838385242] [2022-11-02 20:46:26,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:46:26,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:46:26,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:46:26,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:46:26,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:46:26,875 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 759 out of 961 [2022-11-02 20:46:26,880 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 851 places, 790 transitions, 1761 flow. Second operand has 18 states, 18 states have (on average 761.6111111111111) internal successors, (13709), 18 states have internal predecessors, (13709), 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 20:46:26,880 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:46:26,880 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 759 of 961 [2022-11-02 20:46:26,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:46:27,912 INFO L130 PetriNetUnfolder]: 0/1241 cut-off events. [2022-11-02 20:46:27,912 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2022-11-02 20:46:27,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1795 conditions, 1241 events. 0/1241 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4052 event pairs, 0 based on Foata normal form. 4/1245 useless extension candidates. Maximal degree in co-relation 0. Up to 87 conditions per place. [2022-11-02 20:46:27,915 INFO L137 encePairwiseOnDemand]: 955/961 looper letters, 45 selfloop transitions, 21 changer transitions 0/814 dead transitions. [2022-11-02 20:46:27,915 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 871 places, 814 transitions, 2001 flow [2022-11-02 20:46:27,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:46:27,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:46:27,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 16009 transitions. [2022-11-02 20:46:27,924 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7932708983697537 [2022-11-02 20:46:27,924 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 16009 transitions. [2022-11-02 20:46:27,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 16009 transitions. [2022-11-02 20:46:27,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:46:27,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 16009 transitions. [2022-11-02 20:46:27,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 762.3333333333334) internal successors, (16009), 21 states have internal predecessors, (16009), 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 20:46:27,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 961.0) internal successors, (21142), 22 states have internal predecessors, (21142), 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 20:46:27,946 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 961.0) internal successors, (21142), 22 states have internal predecessors, (21142), 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 20:46:27,946 INFO L175 Difference]: Start difference. First operand has 851 places, 790 transitions, 1761 flow. Second operand 21 states and 16009 transitions. [2022-11-02 20:46:27,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 871 places, 814 transitions, 2001 flow [2022-11-02 20:46:27,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 870 places, 814 transitions, 1987 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:46:27,956 INFO L231 Difference]: Finished difference. Result has 875 places, 803 transitions, 1885 flow [2022-11-02 20:46:27,956 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=961, PETRI_DIFFERENCE_MINUEND_FLOW=1755, PETRI_DIFFERENCE_MINUEND_PLACES=850, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=790, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=779, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1885, PETRI_PLACES=875, PETRI_TRANSITIONS=803} [2022-11-02 20:46:27,956 INFO L287 CegarLoopForPetriNet]: 850 programPoint places, 25 predicate places. [2022-11-02 20:46:27,956 INFO L495 AbstractCegarLoop]: Abstraction has has 875 places, 803 transitions, 1885 flow [2022-11-02 20:46:27,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 761.6111111111111) internal successors, (13709), 18 states have internal predecessors, (13709), 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 20:46:27,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:46:27,958 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:46:27,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-11-02 20:46:28,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-11-02 20:46:28,163 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:46:28,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:46:28,163 INFO L85 PathProgramCache]: Analyzing trace with hash 786428419, now seen corresponding path program 1 times [2022-11-02 20:46:28,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:46:28,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889846293] [2022-11-02 20:46:28,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:28,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:46:28,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:28,366 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:28,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:46:28,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889846293] [2022-11-02 20:46:28,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889846293] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:46:28,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776535560] [2022-11-02 20:46:28,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:28,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:46:28,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:46:28,371 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:46:28,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-11-02 20:46:29,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:29,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:46:29,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:46:29,225 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:29,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:46:29,508 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:29,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776535560] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:46:29,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:46:29,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-02 20:46:29,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942270997] [2022-11-02 20:46:29,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:46:29,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:46:29,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:46:29,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:46:29,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:46:29,523 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 759 out of 961 [2022-11-02 20:46:29,531 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 875 places, 803 transitions, 1885 flow. Second operand has 34 states, 34 states have (on average 761.7941176470588) internal successors, (25901), 34 states have internal predecessors, (25901), 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 20:46:29,531 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:46:29,531 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 759 of 961 [2022-11-02 20:46:29,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:46:31,008 INFO L130 PetriNetUnfolder]: 0/1153 cut-off events. [2022-11-02 20:46:31,008 INFO L131 PetriNetUnfolder]: For 600/600 co-relation queries the response was YES. [2022-11-02 20:46:31,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1858 conditions, 1153 events. 0/1153 cut-off events. For 600/600 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3458 event pairs, 0 based on Foata normal form. 8/1161 useless extension candidates. Maximal degree in co-relation 0. Up to 55 conditions per place. [2022-11-02 20:46:31,011 INFO L137 encePairwiseOnDemand]: 955/961 looper letters, 61 selfloop transitions, 45 changer transitions 0/854 dead transitions. [2022-11-02 20:46:31,011 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 919 places, 854 transitions, 2413 flow [2022-11-02 20:46:31,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-02 20:46:31,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-02 20:46:31,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 34269 transitions. [2022-11-02 20:46:31,027 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7924384321886924 [2022-11-02 20:46:31,028 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 34269 transitions. [2022-11-02 20:46:31,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 34269 transitions. [2022-11-02 20:46:31,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:46:31,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 34269 transitions. [2022-11-02 20:46:31,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 761.5333333333333) internal successors, (34269), 45 states have internal predecessors, (34269), 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 20:46:31,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 961.0) internal successors, (44206), 46 states have internal predecessors, (44206), 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 20:46:31,076 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 961.0) internal successors, (44206), 46 states have internal predecessors, (44206), 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 20:46:31,076 INFO L175 Difference]: Start difference. First operand has 875 places, 803 transitions, 1885 flow. Second operand 45 states and 34269 transitions. [2022-11-02 20:46:31,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 919 places, 854 transitions, 2413 flow [2022-11-02 20:46:31,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 913 places, 854 transitions, 2373 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-02 20:46:31,089 INFO L231 Difference]: Finished difference. Result has 922 places, 828 transitions, 2163 flow [2022-11-02 20:46:31,089 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=961, PETRI_DIFFERENCE_MINUEND_FLOW=1861, PETRI_DIFFERENCE_MINUEND_PLACES=869, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=803, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=780, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2163, PETRI_PLACES=922, PETRI_TRANSITIONS=828} [2022-11-02 20:46:31,090 INFO L287 CegarLoopForPetriNet]: 850 programPoint places, 72 predicate places. [2022-11-02 20:46:31,090 INFO L495 AbstractCegarLoop]: Abstraction has has 922 places, 828 transitions, 2163 flow [2022-11-02 20:46:31,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 761.7941176470588) internal successors, (25901), 34 states have internal predecessors, (25901), 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 20:46:31,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:46:31,093 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:46:31,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-11-02 20:46:31,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-11-02 20:46:31,293 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:46:31,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:46:31,294 INFO L85 PathProgramCache]: Analyzing trace with hash -596766729, now seen corresponding path program 1 times [2022-11-02 20:46:31,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:46:31,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105459433] [2022-11-02 20:46:31,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:31,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:46:31,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:31,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:31,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:46:31,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105459433] [2022-11-02 20:46:31,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105459433] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:46:31,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045494177] [2022-11-02 20:46:31,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:31,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:46:31,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:46:31,970 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:46:31,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-11-02 20:46:32,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:32,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 20:46:32,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:46:33,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:33,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:46:34,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:34,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045494177] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:46:34,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:46:34,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-02 20:46:34,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325426624] [2022-11-02 20:46:34,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:46:34,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-02 20:46:34,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:46:34,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-02 20:46:34,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-02 20:46:34,033 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 759 out of 961 [2022-11-02 20:46:34,049 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 922 places, 828 transitions, 2163 flow. Second operand has 66 states, 66 states have (on average 761.8939393939394) internal successors, (50285), 66 states have internal predecessors, (50285), 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 20:46:34,049 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:46:34,049 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 759 of 961 [2022-11-02 20:46:34,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:46:36,588 INFO L130 PetriNetUnfolder]: 0/1010 cut-off events. [2022-11-02 20:46:36,588 INFO L131 PetriNetUnfolder]: For 1740/1740 co-relation queries the response was YES. [2022-11-02 20:46:36,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1725 conditions, 1010 events. 0/1010 cut-off events. For 1740/1740 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2541 event pairs, 0 based on Foata normal form. 13/1023 useless extension candidates. Maximal degree in co-relation 0. Up to 50 conditions per place. [2022-11-02 20:46:36,590 INFO L137 encePairwiseOnDemand]: 956/961 looper letters, 84 selfloop transitions, 82 changer transitions 0/904 dead transitions. [2022-11-02 20:46:36,591 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 994 places, 904 transitions, 3117 flow [2022-11-02 20:46:36,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-11-02 20:46:36,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2022-11-02 20:46:36,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 63935 transitions. [2022-11-02 20:46:36,619 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7920197215202418 [2022-11-02 20:46:36,619 INFO L72 ComplementDD]: Start complementDD. Operand 84 states and 63935 transitions. [2022-11-02 20:46:36,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 84 states and 63935 transitions. [2022-11-02 20:46:36,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:46:36,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 84 states and 63935 transitions. [2022-11-02 20:46:36,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 85 states, 84 states have (on average 761.1309523809524) internal successors, (63935), 84 states have internal predecessors, (63935), 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 20:46:36,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 85 states, 85 states have (on average 961.0) internal successors, (81685), 85 states have internal predecessors, (81685), 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 20:46:36,710 INFO L81 ComplementDD]: Finished complementDD. Result has 85 states, 85 states have (on average 961.0) internal successors, (81685), 85 states have internal predecessors, (81685), 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 20:46:36,710 INFO L175 Difference]: Start difference. First operand has 922 places, 828 transitions, 2163 flow. Second operand 84 states and 63935 transitions. [2022-11-02 20:46:36,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 994 places, 904 transitions, 3117 flow [2022-11-02 20:46:36,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 961 places, 904 transitions, 2892 flow, removed 22 selfloop flow, removed 33 redundant places. [2022-11-02 20:46:36,724 INFO L231 Difference]: Finished difference. Result has 961 places, 853 transitions, 2439 flow [2022-11-02 20:46:36,725 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=961, PETRI_DIFFERENCE_MINUEND_FLOW=1999, PETRI_DIFFERENCE_MINUEND_PLACES=878, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=817, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=771, PETRI_DIFFERENCE_SUBTRAHEND_STATES=84, PETRI_FLOW=2439, PETRI_PLACES=961, PETRI_TRANSITIONS=853} [2022-11-02 20:46:36,725 INFO L287 CegarLoopForPetriNet]: 850 programPoint places, 111 predicate places. [2022-11-02 20:46:36,725 INFO L495 AbstractCegarLoop]: Abstraction has has 961 places, 853 transitions, 2439 flow [2022-11-02 20:46:36,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 761.8939393939394) internal successors, (50285), 66 states have internal predecessors, (50285), 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 20:46:36,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:46:36,731 INFO L208 CegarLoopForPetriNet]: trace histogram [28, 28, 28, 28, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:46:36,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-11-02 20:46:36,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:46:36,931 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:46:36,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:46:36,932 INFO L85 PathProgramCache]: Analyzing trace with hash -98295915, now seen corresponding path program 1 times [2022-11-02 20:46:36,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:46:36,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282940525] [2022-11-02 20:46:36,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:36,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:46:36,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:46:36,973 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:46:36,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:46:37,059 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:46:37,060 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:46:37,060 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:46:37,060 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:46:37,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2022-11-02 20:46:37,060 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-02 20:46:37,061 WARN L233 ceAbstractionStarter]: 27 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:46:37,061 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 28 thread instances. [2022-11-02 20:46:37,141 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:46:37,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 879 places, 994 transitions, 2884 flow [2022-11-02 20:46:38,124 INFO L130 PetriNetUnfolder]: 284/1997 cut-off events. [2022-11-02 20:46:38,124 INFO L131 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2022-11-02 20:46:38,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2488 conditions, 1997 events. 284/1997 cut-off events. For 4032/4032 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 7284 event pairs, 0 based on Foata normal form. 0/1655 useless extension candidates. Maximal degree in co-relation 2360. Up to 58 conditions per place. [2022-11-02 20:46:38,267 INFO L82 GeneralOperation]: Start removeDead. Operand has 879 places, 994 transitions, 2884 flow [2022-11-02 20:46:38,311 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 879 places, 994 transitions, 2884 flow [2022-11-02 20:46:38,312 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:46:38,312 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;@4e0ca16a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:46:38,312 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:46:38,317 INFO L130 PetriNetUnfolder]: 2/73 cut-off events. [2022-11-02 20:46:38,317 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:46:38,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:46:38,317 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] [2022-11-02 20:46:38,317 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:46:38,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:46:38,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1744867233, now seen corresponding path program 1 times [2022-11-02 20:46:38,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:46:38,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774855071] [2022-11-02 20:46:38,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:38,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:46:38,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:38,333 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 20:46:38,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:46:38,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774855071] [2022-11-02 20:46:38,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774855071] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:46:38,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:46:38,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:46:38,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559013494] [2022-11-02 20:46:38,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:46:38,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:46:38,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:46:38,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:46:38,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:46:38,335 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 793 out of 994 [2022-11-02 20:46:38,336 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 879 places, 994 transitions, 2884 flow. Second operand has 2 states, 2 states have (on average 793.5) internal successors, (1587), 2 states have internal predecessors, (1587), 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 20:46:38,336 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:46:38,336 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 793 of 994 [2022-11-02 20:46:38,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:46:39,295 INFO L130 PetriNetUnfolder]: 0/1684 cut-off events. [2022-11-02 20:46:39,296 INFO L131 PetriNetUnfolder]: For 4438/4438 co-relation queries the response was YES. [2022-11-02 20:46:39,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2204 conditions, 1684 events. 0/1684 cut-off events. For 4438/4438 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 6898 event pairs, 0 based on Foata normal form. 2392/4018 useless extension candidates. Maximal degree in co-relation 0. Up to 29 conditions per place. [2022-11-02 20:46:39,298 INFO L137 encePairwiseOnDemand]: 822/994 looper letters, 28 selfloop transitions, 0 changer transitions 11/821 dead transitions. [2022-11-02 20:46:39,298 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 879 places, 821 transitions, 2594 flow [2022-11-02 20:46:39,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:46:39,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:46:39,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1786 transitions. [2022-11-02 20:46:39,300 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8983903420523138 [2022-11-02 20:46:39,300 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1786 transitions. [2022-11-02 20:46:39,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1786 transitions. [2022-11-02 20:46:39,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:46:39,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1786 transitions. [2022-11-02 20:46:39,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 893.0) internal successors, (1786), 2 states have internal predecessors, (1786), 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 20:46:39,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 994.0) internal successors, (2982), 3 states have internal predecessors, (2982), 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 20:46:39,303 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 994.0) internal successors, (2982), 3 states have internal predecessors, (2982), 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 20:46:39,303 INFO L175 Difference]: Start difference. First operand has 879 places, 994 transitions, 2884 flow. Second operand 2 states and 1786 transitions. [2022-11-02 20:46:39,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 879 places, 821 transitions, 2594 flow [2022-11-02 20:46:39,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 879 places, 821 transitions, 1838 flow, removed 378 selfloop flow, removed 0 redundant places. [2022-11-02 20:46:39,316 INFO L231 Difference]: Finished difference. Result has 879 places, 810 transitions, 1760 flow [2022-11-02 20:46:39,316 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=994, PETRI_DIFFERENCE_MINUEND_FLOW=1782, PETRI_DIFFERENCE_MINUEND_PLACES=878, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=821, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=821, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1760, PETRI_PLACES=879, PETRI_TRANSITIONS=810} [2022-11-02 20:46:39,317 INFO L287 CegarLoopForPetriNet]: 879 programPoint places, 0 predicate places. [2022-11-02 20:46:39,317 INFO L495 AbstractCegarLoop]: Abstraction has has 879 places, 810 transitions, 1760 flow [2022-11-02 20:46:39,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 793.5) internal successors, (1587), 2 states have internal predecessors, (1587), 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 20:46:39,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:46:39,317 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] [2022-11-02 20:46:39,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2022-11-02 20:46:39,317 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:46:39,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:46:39,318 INFO L85 PathProgramCache]: Analyzing trace with hash -52084126, now seen corresponding path program 1 times [2022-11-02 20:46:39,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:46:39,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33631979] [2022-11-02 20:46:39,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:39,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:46:39,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:39,342 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 20:46:39,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:46:39,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33631979] [2022-11-02 20:46:39,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33631979] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:46:39,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:46:39,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:46:39,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706798962] [2022-11-02 20:46:39,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:46:39,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:46:39,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:46:39,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:46:39,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:46:39,344 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 786 out of 994 [2022-11-02 20:46:39,345 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 879 places, 810 transitions, 1760 flow. Second operand has 3 states, 3 states have (on average 787.0) internal successors, (2361), 3 states have internal predecessors, (2361), 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 20:46:39,346 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:46:39,346 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 786 of 994 [2022-11-02 20:46:39,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:46:40,175 INFO L130 PetriNetUnfolder]: 0/1354 cut-off events. [2022-11-02 20:46:40,175 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2022-11-02 20:46:40,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1641 conditions, 1354 events. 0/1354 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4621 event pairs, 0 based on Foata normal form. 0/1326 useless extension candidates. Maximal degree in co-relation 0. Up to 168 conditions per place. [2022-11-02 20:46:40,178 INFO L137 encePairwiseOnDemand]: 991/994 looper letters, 37 selfloop transitions, 2 changer transitions 0/814 dead transitions. [2022-11-02 20:46:40,178 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 870 places, 814 transitions, 1846 flow [2022-11-02 20:46:40,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:46:40,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:46:40,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2398 transitions. [2022-11-02 20:46:40,180 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8041582830315225 [2022-11-02 20:46:40,180 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2398 transitions. [2022-11-02 20:46:40,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2398 transitions. [2022-11-02 20:46:40,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:46:40,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2398 transitions. [2022-11-02 20:46:40,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 799.3333333333334) internal successors, (2398), 3 states have internal predecessors, (2398), 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 20:46:40,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 994.0) internal successors, (3976), 4 states have internal predecessors, (3976), 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 20:46:40,184 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 994.0) internal successors, (3976), 4 states have internal predecessors, (3976), 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 20:46:40,184 INFO L175 Difference]: Start difference. First operand has 879 places, 810 transitions, 1760 flow. Second operand 3 states and 2398 transitions. [2022-11-02 20:46:40,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 870 places, 814 transitions, 1846 flow [2022-11-02 20:46:40,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 870 places, 814 transitions, 1846 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:46:40,192 INFO L231 Difference]: Finished difference. Result has 871 places, 811 transitions, 1772 flow [2022-11-02 20:46:40,192 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=994, PETRI_DIFFERENCE_MINUEND_FLOW=1760, PETRI_DIFFERENCE_MINUEND_PLACES=868, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=810, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=808, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1772, PETRI_PLACES=871, PETRI_TRANSITIONS=811} [2022-11-02 20:46:40,193 INFO L287 CegarLoopForPetriNet]: 879 programPoint places, -8 predicate places. [2022-11-02 20:46:40,193 INFO L495 AbstractCegarLoop]: Abstraction has has 871 places, 811 transitions, 1772 flow [2022-11-02 20:46:40,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 787.0) internal successors, (2361), 3 states have internal predecessors, (2361), 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 20:46:40,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:46:40,193 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] [2022-11-02 20:46:40,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2022-11-02 20:46:40,193 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:46:40,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:46:40,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1881358998, now seen corresponding path program 1 times [2022-11-02 20:46:40,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:46:40,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460132621] [2022-11-02 20:46:40,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:40,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:46:40,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:40,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:40,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:46:40,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460132621] [2022-11-02 20:46:40,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460132621] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:46:40,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958561384] [2022-11-02 20:46:40,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:40,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:46:40,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:46:40,243 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:46:40,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-11-02 20:46:41,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:41,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:46:41,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:46:41,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:41,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:46:41,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:41,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958561384] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:46:41,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:46:41,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:46:41,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375664012] [2022-11-02 20:46:41,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:46:41,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:46:41,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:46:41,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:46:41,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:46:41,080 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 785 out of 994 [2022-11-02 20:46:41,083 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 871 places, 811 transitions, 1772 flow. Second operand has 10 states, 10 states have (on average 787.3) internal successors, (7873), 10 states have internal predecessors, (7873), 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 20:46:41,084 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:46:41,084 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 785 of 994 [2022-11-02 20:46:41,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:46:42,041 INFO L130 PetriNetUnfolder]: 0/1332 cut-off events. [2022-11-02 20:46:42,041 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-02 20:46:42,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1703 conditions, 1332 events. 0/1332 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4491 event pairs, 0 based on Foata normal form. 2/1334 useless extension candidates. Maximal degree in co-relation 0. Up to 107 conditions per place. [2022-11-02 20:46:42,044 INFO L137 encePairwiseOnDemand]: 988/994 looper letters, 38 selfloop transitions, 9 changer transitions 0/821 dead transitions. [2022-11-02 20:46:42,044 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 879 places, 821 transitions, 1888 flow [2022-11-02 20:46:42,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:46:42,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:46:42,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 7114 transitions. [2022-11-02 20:46:42,049 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7952157388777107 [2022-11-02 20:46:42,049 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 7114 transitions. [2022-11-02 20:46:42,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 7114 transitions. [2022-11-02 20:46:42,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:46:42,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 7114 transitions. [2022-11-02 20:46:42,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 790.4444444444445) internal successors, (7114), 9 states have internal predecessors, (7114), 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 20:46:42,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 994.0) internal successors, (9940), 10 states have internal predecessors, (9940), 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 20:46:42,060 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 994.0) internal successors, (9940), 10 states have internal predecessors, (9940), 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 20:46:42,060 INFO L175 Difference]: Start difference. First operand has 871 places, 811 transitions, 1772 flow. Second operand 9 states and 7114 transitions. [2022-11-02 20:46:42,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 879 places, 821 transitions, 1888 flow [2022-11-02 20:46:42,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 878 places, 821 transitions, 1886 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:46:42,069 INFO L231 Difference]: Finished difference. Result has 881 places, 817 transitions, 1820 flow [2022-11-02 20:46:42,070 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=994, PETRI_DIFFERENCE_MINUEND_FLOW=1770, PETRI_DIFFERENCE_MINUEND_PLACES=870, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=811, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=805, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1820, PETRI_PLACES=881, PETRI_TRANSITIONS=817} [2022-11-02 20:46:42,070 INFO L287 CegarLoopForPetriNet]: 879 programPoint places, 2 predicate places. [2022-11-02 20:46:42,070 INFO L495 AbstractCegarLoop]: Abstraction has has 881 places, 817 transitions, 1820 flow [2022-11-02 20:46:42,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 787.3) internal successors, (7873), 10 states have internal predecessors, (7873), 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 20:46:42,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:46:42,071 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:46:42,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-11-02 20:46:42,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:46:42,272 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:46:42,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:46:42,272 INFO L85 PathProgramCache]: Analyzing trace with hash 2118794433, now seen corresponding path program 1 times [2022-11-02 20:46:42,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:46:42,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295825844] [2022-11-02 20:46:42,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:42,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:46:42,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:42,349 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:42,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:46:42,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295825844] [2022-11-02 20:46:42,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295825844] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:46:42,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597670119] [2022-11-02 20:46:42,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:42,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:46:42,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:46:42,351 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:46:42,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-11-02 20:46:43,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:43,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:46:43,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:46:43,191 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:43,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:46:43,281 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:43,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597670119] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:46:43,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:46:43,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:46:43,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712802867] [2022-11-02 20:46:43,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:46:43,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:46:43,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:46:43,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:46:43,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:46:43,288 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 785 out of 994 [2022-11-02 20:46:43,294 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 881 places, 817 transitions, 1820 flow. Second operand has 18 states, 18 states have (on average 787.6111111111111) internal successors, (14177), 18 states have internal predecessors, (14177), 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 20:46:43,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:46:43,294 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 785 of 994 [2022-11-02 20:46:43,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:46:44,426 INFO L130 PetriNetUnfolder]: 0/1288 cut-off events. [2022-11-02 20:46:44,426 INFO L131 PetriNetUnfolder]: For 162/162 co-relation queries the response was YES. [2022-11-02 20:46:44,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1864 conditions, 1288 events. 0/1288 cut-off events. For 162/162 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4204 event pairs, 0 based on Foata normal form. 4/1292 useless extension candidates. Maximal degree in co-relation 0. Up to 91 conditions per place. [2022-11-02 20:46:44,429 INFO L137 encePairwiseOnDemand]: 988/994 looper letters, 46 selfloop transitions, 21 changer transitions 0/841 dead transitions. [2022-11-02 20:46:44,429 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 901 places, 841 transitions, 2062 flow [2022-11-02 20:46:44,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:46:44,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:46:44,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 16556 transitions. [2022-11-02 20:46:44,439 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7931397911277187 [2022-11-02 20:46:44,439 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 16556 transitions. [2022-11-02 20:46:44,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 16556 transitions. [2022-11-02 20:46:44,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:46:44,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 16556 transitions. [2022-11-02 20:46:44,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 788.3809523809524) internal successors, (16556), 21 states have internal predecessors, (16556), 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 20:46:44,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 994.0) internal successors, (21868), 22 states have internal predecessors, (21868), 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 20:46:44,463 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 994.0) internal successors, (21868), 22 states have internal predecessors, (21868), 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 20:46:44,463 INFO L175 Difference]: Start difference. First operand has 881 places, 817 transitions, 1820 flow. Second operand 21 states and 16556 transitions. [2022-11-02 20:46:44,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 901 places, 841 transitions, 2062 flow [2022-11-02 20:46:44,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 900 places, 841 transitions, 2048 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:46:44,473 INFO L231 Difference]: Finished difference. Result has 905 places, 830 transitions, 1944 flow [2022-11-02 20:46:44,474 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=994, PETRI_DIFFERENCE_MINUEND_FLOW=1814, PETRI_DIFFERENCE_MINUEND_PLACES=880, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=817, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=806, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1944, PETRI_PLACES=905, PETRI_TRANSITIONS=830} [2022-11-02 20:46:44,474 INFO L287 CegarLoopForPetriNet]: 879 programPoint places, 26 predicate places. [2022-11-02 20:46:44,474 INFO L495 AbstractCegarLoop]: Abstraction has has 905 places, 830 transitions, 1944 flow [2022-11-02 20:46:44,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 787.6111111111111) internal successors, (14177), 18 states have internal predecessors, (14177), 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 20:46:44,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:46:44,475 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:46:44,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-11-02 20:46:44,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:46:44,676 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:46:44,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:46:44,676 INFO L85 PathProgramCache]: Analyzing trace with hash 773674275, now seen corresponding path program 1 times [2022-11-02 20:46:44,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:46:44,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127663325] [2022-11-02 20:46:44,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:44,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:46:44,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:44,859 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:44,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:46:44,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127663325] [2022-11-02 20:46:44,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127663325] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:46:44,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147629006] [2022-11-02 20:46:44,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:44,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:46:44,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:46:44,861 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:46:44,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-11-02 20:46:45,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:45,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:46:45,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:46:45,763 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:45,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:46:46,048 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:46,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147629006] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:46:46,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:46:46,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-02 20:46:46,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330355422] [2022-11-02 20:46:46,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:46:46,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:46:46,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:46:46,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:46:46,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:46:46,067 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 785 out of 994 [2022-11-02 20:46:46,076 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 905 places, 830 transitions, 1944 flow. Second operand has 34 states, 34 states have (on average 787.7941176470588) internal successors, (26785), 34 states have internal predecessors, (26785), 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 20:46:46,076 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:46:46,076 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 785 of 994 [2022-11-02 20:46:46,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:46:47,599 INFO L130 PetriNetUnfolder]: 0/1200 cut-off events. [2022-11-02 20:46:47,599 INFO L131 PetriNetUnfolder]: For 627/627 co-relation queries the response was YES. [2022-11-02 20:46:47,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1936 conditions, 1200 events. 0/1200 cut-off events. For 627/627 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3640 event pairs, 0 based on Foata normal form. 8/1208 useless extension candidates. Maximal degree in co-relation 0. Up to 59 conditions per place. [2022-11-02 20:46:47,602 INFO L137 encePairwiseOnDemand]: 988/994 looper letters, 62 selfloop transitions, 45 changer transitions 0/881 dead transitions. [2022-11-02 20:46:47,602 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 949 places, 881 transitions, 2474 flow [2022-11-02 20:46:47,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-02 20:46:47,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-02 20:46:47,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 35440 transitions. [2022-11-02 20:46:47,753 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7923094120277219 [2022-11-02 20:46:47,753 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 35440 transitions. [2022-11-02 20:46:47,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 35440 transitions. [2022-11-02 20:46:47,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:46:47,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 35440 transitions. [2022-11-02 20:46:47,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 787.5555555555555) internal successors, (35440), 45 states have internal predecessors, (35440), 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 20:46:47,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 994.0) internal successors, (45724), 46 states have internal predecessors, (45724), 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 20:46:47,803 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 994.0) internal successors, (45724), 46 states have internal predecessors, (45724), 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 20:46:47,804 INFO L175 Difference]: Start difference. First operand has 905 places, 830 transitions, 1944 flow. Second operand 45 states and 35440 transitions. [2022-11-02 20:46:47,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 949 places, 881 transitions, 2474 flow [2022-11-02 20:46:47,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 943 places, 881 transitions, 2434 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-02 20:46:47,816 INFO L231 Difference]: Finished difference. Result has 952 places, 855 transitions, 2222 flow [2022-11-02 20:46:47,816 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=994, PETRI_DIFFERENCE_MINUEND_FLOW=1920, PETRI_DIFFERENCE_MINUEND_PLACES=899, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=830, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=807, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2222, PETRI_PLACES=952, PETRI_TRANSITIONS=855} [2022-11-02 20:46:47,816 INFO L287 CegarLoopForPetriNet]: 879 programPoint places, 73 predicate places. [2022-11-02 20:46:47,816 INFO L495 AbstractCegarLoop]: Abstraction has has 952 places, 855 transitions, 2222 flow [2022-11-02 20:46:47,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 787.7941176470588) internal successors, (26785), 34 states have internal predecessors, (26785), 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 20:46:47,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:46:47,819 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:46:47,845 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bfadffa-befc-4c22-839f-ea6be1a1d401/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0