./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/fib_unsafe-6.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_2e2c6b4a-4c20-4ffa-bb19-3597a8f5d1c3/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2c6b4a-4c20-4ffa-bb19-3597a8f5d1c3/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2c6b4a-4c20-4ffa-bb19-3597a8f5d1c3/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2c6b4a-4c20-4ffa-bb19-3597a8f5d1c3/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/fib_unsafe-6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2c6b4a-4c20-4ffa-bb19-3597a8f5d1c3/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2c6b4a-4c20-4ffa-bb19-3597a8f5d1c3/bin/uautomizer-tPACEb0tL8 --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 47d811dedd166243d18e0dd1600dbdc22509d3e45a6282042d09f76ff5301e3f --- 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-e04fb08 [2022-11-16 11:38:08,038 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:38:08,041 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:38:08,082 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:38:08,083 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:38:08,084 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:38:08,085 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:38:08,087 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:38:08,089 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:38:08,090 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:38:08,101 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:38:08,106 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:38:08,107 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:38:08,108 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:38:08,109 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:38:08,110 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:38:08,111 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:38:08,112 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:38:08,113 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:38:08,121 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:38:08,132 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:38:08,134 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:38:08,136 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:38:08,137 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:38:08,140 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:38:08,141 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:38:08,141 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:38:08,142 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:38:08,143 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:38:08,144 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:38:08,144 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:38:08,145 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:38:08,146 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:38:08,146 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:38:08,152 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:38:08,153 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:38:08,154 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:38:08,155 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:38:08,155 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:38:08,156 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:38:08,157 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:38:08,160 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2c6b4a-4c20-4ffa-bb19-3597a8f5d1c3/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:38:08,187 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:38:08,187 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:38:08,188 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:38:08,188 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:38:08,189 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:38:08,189 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:38:08,190 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:38:08,190 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:38:08,190 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:38:08,190 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:38:08,191 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:38:08,191 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:38:08,191 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:38:08,191 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:38:08,192 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:38:08,204 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:38:08,204 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:38:08,204 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:38:08,205 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:38:08,205 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:38:08,205 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:38:08,205 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:38:08,206 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:38:08,206 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:38:08,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:38:08,207 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:38:08,207 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:38:08,207 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:38:08,207 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:38:08,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:38:08,208 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:38:08,208 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:38:08,208 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:38:08,209 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_2e2c6b4a-4c20-4ffa-bb19-3597a8f5d1c3/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2c6b4a-4c20-4ffa-bb19-3597a8f5d1c3/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 47d811dedd166243d18e0dd1600dbdc22509d3e45a6282042d09f76ff5301e3f [2022-11-16 11:38:08,457 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:38:08,487 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:38:08,490 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:38:08,492 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:38:08,493 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:38:08,494 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2c6b4a-4c20-4ffa-bb19-3597a8f5d1c3/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/pthread/fib_unsafe-6.i [2022-11-16 11:38:08,573 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2c6b4a-4c20-4ffa-bb19-3597a8f5d1c3/bin/uautomizer-tPACEb0tL8/data/7d2dcfed2/0ebad9362f05445f8827db523a76cce1/FLAG130d81ac4 [2022-11-16 11:38:09,170 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:38:09,171 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2c6b4a-4c20-4ffa-bb19-3597a8f5d1c3/sv-benchmarks/c/pthread/fib_unsafe-6.i [2022-11-16 11:38:09,184 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2c6b4a-4c20-4ffa-bb19-3597a8f5d1c3/bin/uautomizer-tPACEb0tL8/data/7d2dcfed2/0ebad9362f05445f8827db523a76cce1/FLAG130d81ac4 [2022-11-16 11:38:09,455 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2c6b4a-4c20-4ffa-bb19-3597a8f5d1c3/bin/uautomizer-tPACEb0tL8/data/7d2dcfed2/0ebad9362f05445f8827db523a76cce1 [2022-11-16 11:38:09,458 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:38:09,462 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:38:09,464 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:38:09,464 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:38:09,468 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:38:09,469 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:38:09" (1/1) ... [2022-11-16 11:38:09,470 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42bf2e96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:38:09, skipping insertion in model container [2022-11-16 11:38:09,471 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:38:09" (1/1) ... [2022-11-16 11:38:09,478 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:38:09,528 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:38:09,862 WARN L229 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_2e2c6b4a-4c20-4ffa-bb19-3597a8f5d1c3/sv-benchmarks/c/pthread/fib_unsafe-6.i[30243,30256] [2022-11-16 11:38:09,896 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:38:09,909 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:38:09,977 WARN L229 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_2e2c6b4a-4c20-4ffa-bb19-3597a8f5d1c3/sv-benchmarks/c/pthread/fib_unsafe-6.i[30243,30256] [2022-11-16 11:38:09,986 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:38:10,018 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:38:10,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:38:10 WrapperNode [2022-11-16 11:38:10,019 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:38:10,020 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:38:10,020 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:38:10,021 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:38:10,028 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:38:10" (1/1) ... [2022-11-16 11:38:10,041 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:38:10" (1/1) ... [2022-11-16 11:38:10,061 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2022-11-16 11:38:10,062 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:38:10,062 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:38:10,063 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:38:10,063 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:38:10,072 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:38:10" (1/1) ... [2022-11-16 11:38:10,072 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:38:10" (1/1) ... [2022-11-16 11:38:10,075 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:38:10" (1/1) ... [2022-11-16 11:38:10,075 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:38:10" (1/1) ... [2022-11-16 11:38:10,080 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:38:10" (1/1) ... [2022-11-16 11:38:10,085 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:38:10" (1/1) ... [2022-11-16 11:38:10,087 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:38:10" (1/1) ... [2022-11-16 11:38:10,088 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:38:10" (1/1) ... [2022-11-16 11:38:10,090 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:38:10,091 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:38:10,091 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:38:10,091 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:38:10,092 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:38:10" (1/1) ... [2022-11-16 11:38:10,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:38:10,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2c6b4a-4c20-4ffa-bb19-3597a8f5d1c3/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:38:10,132 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2c6b4a-4c20-4ffa-bb19-3597a8f5d1c3/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:38:10,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2c6b4a-4c20-4ffa-bb19-3597a8f5d1c3/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:38:10,186 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-16 11:38:10,186 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-16 11:38:10,186 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-16 11:38:10,186 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-16 11:38:10,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:38:10,187 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 11:38:10,187 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:38:10,187 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:38:10,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:38:10,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:38:10,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 11:38:10,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:38:10,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:38:10,189 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 11:38:10,369 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:38:10,371 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:38:10,624 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:38:10,636 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:38:10,636 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-16 11:38:10,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:38:10 BoogieIcfgContainer [2022-11-16 11:38:10,639 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:38:10,642 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:38:10,642 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:38:10,650 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:38:10,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:38:09" (1/3) ... [2022-11-16 11:38:10,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@288d3891 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:38:10, skipping insertion in model container [2022-11-16 11:38:10,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:38:10" (2/3) ... [2022-11-16 11:38:10,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@288d3891 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:38:10, skipping insertion in model container [2022-11-16 11:38:10,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:38:10" (3/3) ... [2022-11-16 11:38:10,654 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-6.i [2022-11-16 11:38:10,665 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 11:38:10,675 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:38:10,675 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:38:10,675 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 11:38:10,775 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-16 11:38:10,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 101 transitions, 212 flow [2022-11-16 11:38:10,934 INFO L130 PetriNetUnfolder]: 7/99 cut-off events. [2022-11-16 11:38:10,934 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 11:38:10,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 99 events. 7/99 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 69 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 70. Up to 2 conditions per place. [2022-11-16 11:38:10,944 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 101 transitions, 212 flow [2022-11-16 11:38:10,952 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 99 transitions, 204 flow [2022-11-16 11:38:10,979 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:38:10,992 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;@39550569, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:38:10,992 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-16 11:38:11,037 INFO L130 PetriNetUnfolder]: 6/87 cut-off events. [2022-11-16 11:38:11,037 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 11:38:11,038 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:38:11,038 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:38:11,039 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:38:11,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:38:11,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1370645073, now seen corresponding path program 1 times [2022-11-16 11:38:11,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:38:11,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552178502] [2022-11-16 11:38:11,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:38:11,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:38:11,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:38:11,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:11,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:38:11,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552178502] [2022-11-16 11:38:11,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552178502] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:38:11,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:38:11,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:38:11,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791948513] [2022-11-16 11:38:11,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:38:11,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:38:11,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:38:11,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:38:11,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:38:11,453 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 101 [2022-11-16 11:38:11,457 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 99 transitions, 204 flow. Second operand has 2 states, 2 states have (on average 95.5) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:11,458 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:38:11,458 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 101 [2022-11-16 11:38:11,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:38:11,531 INFO L130 PetriNetUnfolder]: 3/94 cut-off events. [2022-11-16 11:38:11,531 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 11:38:11,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 94 events. 3/94 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 66 event pairs, 0 based on Foata normal form. 5/95 useless extension candidates. Maximal degree in co-relation 66. Up to 3 conditions per place. [2022-11-16 11:38:11,536 INFO L137 encePairwiseOnDemand]: 97/101 looper letters, 2 selfloop transitions, 0 changer transitions 0/94 dead transitions. [2022-11-16 11:38:11,536 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 94 transitions, 198 flow [2022-11-16 11:38:11,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:38:11,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 11:38:11,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 194 transitions. [2022-11-16 11:38:11,558 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9603960396039604 [2022-11-16 11:38:11,559 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 194 transitions. [2022-11-16 11:38:11,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 194 transitions. [2022-11-16 11:38:11,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:38:11,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 194 transitions. [2022-11-16 11:38:11,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 97.0) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:11,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:11,590 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:11,592 INFO L175 Difference]: Start difference. First operand has 99 places, 99 transitions, 204 flow. Second operand 2 states and 194 transitions. [2022-11-16 11:38:11,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 94 transitions, 198 flow [2022-11-16 11:38:11,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 94 transitions, 196 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-16 11:38:11,605 INFO L231 Difference]: Finished difference. Result has 97 places, 94 transitions, 192 flow [2022-11-16 11:38:11,607 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=192, PETRI_PLACES=97, PETRI_TRANSITIONS=94} [2022-11-16 11:38:11,615 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -2 predicate places. [2022-11-16 11:38:11,616 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 94 transitions, 192 flow [2022-11-16 11:38:11,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 95.5) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:11,616 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:38:11,617 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:38:11,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:38:11,619 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:38:11,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:38:11,621 INFO L85 PathProgramCache]: Analyzing trace with hash 865086448, now seen corresponding path program 1 times [2022-11-16 11:38:11,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:38:11,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635634879] [2022-11-16 11:38:11,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:38:11,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:38:11,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:38:11,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:11,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:38:11,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635634879] [2022-11-16 11:38:11,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635634879] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:38:11,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:38:11,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:38:11,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263468792] [2022-11-16 11:38:11,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:38:11,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:38:11,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:38:11,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:38:11,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:38:11,859 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 101 [2022-11-16 11:38:11,859 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 94 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:11,860 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:38:11,860 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 101 [2022-11-16 11:38:11,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:38:11,936 INFO L130 PetriNetUnfolder]: 3/100 cut-off events. [2022-11-16 11:38:11,936 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 11:38:11,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 100 events. 3/100 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 62 event pairs, 0 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 115. Up to 6 conditions per place. [2022-11-16 11:38:11,940 INFO L137 encePairwiseOnDemand]: 98/101 looper letters, 9 selfloop transitions, 2 changer transitions 0/97 dead transitions. [2022-11-16 11:38:11,940 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 97 transitions, 220 flow [2022-11-16 11:38:11,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:38:11,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 11:38:11,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 276 transitions. [2022-11-16 11:38:11,943 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9108910891089109 [2022-11-16 11:38:11,943 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 276 transitions. [2022-11-16 11:38:11,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 276 transitions. [2022-11-16 11:38:11,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:38:11,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 276 transitions. [2022-11-16 11:38:11,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:11,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:11,947 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:11,947 INFO L175 Difference]: Start difference. First operand has 97 places, 94 transitions, 192 flow. Second operand 3 states and 276 transitions. [2022-11-16 11:38:11,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 97 transitions, 220 flow [2022-11-16 11:38:11,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 97 transitions, 220 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:38:11,953 INFO L231 Difference]: Finished difference. Result has 100 places, 95 transitions, 204 flow [2022-11-16 11:38:11,954 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=100, PETRI_TRANSITIONS=95} [2022-11-16 11:38:11,955 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, 1 predicate places. [2022-11-16 11:38:11,955 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 95 transitions, 204 flow [2022-11-16 11:38:11,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:11,956 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:38:11,956 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:38:11,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:38:11,958 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:38:11,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:38:11,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1310951925, now seen corresponding path program 1 times [2022-11-16 11:38:11,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:38:11,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793275131] [2022-11-16 11:38:11,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:38:11,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:38:11,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:38:12,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:12,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:38:12,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793275131] [2022-11-16 11:38:12,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793275131] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:38:12,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293815713] [2022-11-16 11:38:12,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:38:12,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:38:12,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2c6b4a-4c20-4ffa-bb19-3597a8f5d1c3/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:38:12,243 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2c6b4a-4c20-4ffa-bb19-3597a8f5d1c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:38:12,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2c6b4a-4c20-4ffa-bb19-3597a8f5d1c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:38:12,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:38:12,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:38:12,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:38:12,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:12,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:38:12,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:12,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293815713] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:38:12,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:38:12,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 11:38:12,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995139772] [2022-11-16 11:38:12,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:38:12,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:38:12,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:38:12,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:38:12,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:38:12,576 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 101 [2022-11-16 11:38:12,577 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 95 transitions, 204 flow. Second operand has 10 states, 10 states have (on average 88.0) internal successors, (880), 10 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:12,577 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:38:12,578 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 101 [2022-11-16 11:38:12,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:38:12,689 INFO L130 PetriNetUnfolder]: 3/109 cut-off events. [2022-11-16 11:38:12,689 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-16 11:38:12,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 109 events. 3/109 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 2/108 useless extension candidates. Maximal degree in co-relation 138. Up to 6 conditions per place. [2022-11-16 11:38:12,691 INFO L137 encePairwiseOnDemand]: 95/101 looper letters, 10 selfloop transitions, 9 changer transitions 0/103 dead transitions. [2022-11-16 11:38:12,691 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 103 transitions, 260 flow [2022-11-16 11:38:12,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:38:12,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 11:38:12,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 795 transitions. [2022-11-16 11:38:12,696 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8745874587458746 [2022-11-16 11:38:12,696 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 795 transitions. [2022-11-16 11:38:12,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 795 transitions. [2022-11-16 11:38:12,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:38:12,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 795 transitions. [2022-11-16 11:38:12,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 88.33333333333333) internal successors, (795), 9 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:12,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 101.0) internal successors, (1010), 10 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:12,704 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 101.0) internal successors, (1010), 10 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:12,705 INFO L175 Difference]: Start difference. First operand has 100 places, 95 transitions, 204 flow. Second operand 9 states and 795 transitions. [2022-11-16 11:38:12,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 103 transitions, 260 flow [2022-11-16 11:38:12,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 103 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:38:12,708 INFO L231 Difference]: Finished difference. Result has 110 places, 101 transitions, 252 flow [2022-11-16 11:38:12,708 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=252, PETRI_PLACES=110, PETRI_TRANSITIONS=101} [2022-11-16 11:38:12,714 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, 11 predicate places. [2022-11-16 11:38:12,714 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 101 transitions, 252 flow [2022-11-16 11:38:12,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 88.0) internal successors, (880), 10 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:12,715 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:38:12,715 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:38:12,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2c6b4a-4c20-4ffa-bb19-3597a8f5d1c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 11:38:12,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2c6b4a-4c20-4ffa-bb19-3597a8f5d1c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-16 11:38:12,916 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:38:12,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:38:12,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1106224747, now seen corresponding path program 2 times [2022-11-16 11:38:12,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:38:12,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849146161] [2022-11-16 11:38:12,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:38:12,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:38:12,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:38:13,179 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:13,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:38:13,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849146161] [2022-11-16 11:38:13,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849146161] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:38:13,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349382382] [2022-11-16 11:38:13,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:38:13,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:38:13,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2c6b4a-4c20-4ffa-bb19-3597a8f5d1c3/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:38:13,182 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2c6b4a-4c20-4ffa-bb19-3597a8f5d1c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:38:13,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2c6b4a-4c20-4ffa-bb19-3597a8f5d1c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:38:13,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:38:13,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:38:13,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:38:13,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:38:13,407 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:13,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:38:13,540 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:13,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349382382] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:38:13,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:38:13,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-16 11:38:13,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634337773] [2022-11-16 11:38:13,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:38:13,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:38:13,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:38:13,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:38:13,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:38:13,557 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 101 [2022-11-16 11:38:13,562 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 101 transitions, 252 flow. Second operand has 18 states, 18 states have (on average 88.0) internal successors, (1584), 18 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:13,562 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:38:13,563 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 101 [2022-11-16 11:38:13,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:38:13,839 INFO L130 PetriNetUnfolder]: 3/137 cut-off events. [2022-11-16 11:38:13,839 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-16 11:38:13,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236 conditions, 137 events. 3/137 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 4/138 useless extension candidates. Maximal degree in co-relation 229. Up to 11 conditions per place. [2022-11-16 11:38:13,844 INFO L137 encePairwiseOnDemand]: 95/101 looper letters, 14 selfloop transitions, 21 changer transitions 0/119 dead transitions. [2022-11-16 11:38:13,844 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 119 transitions, 418 flow [2022-11-16 11:38:13,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 11:38:13,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-16 11:38:13,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1845 transitions. [2022-11-16 11:38:13,854 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8698727015558698 [2022-11-16 11:38:13,854 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1845 transitions. [2022-11-16 11:38:13,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1845 transitions. [2022-11-16 11:38:13,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:38:13,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1845 transitions. [2022-11-16 11:38:13,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 87.85714285714286) internal successors, (1845), 21 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:13,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 101.0) internal successors, (2222), 22 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:13,869 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 101.0) internal successors, (2222), 22 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:13,870 INFO L175 Difference]: Start difference. First operand has 110 places, 101 transitions, 252 flow. Second operand 21 states and 1845 transitions. [2022-11-16 11:38:13,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 119 transitions, 418 flow [2022-11-16 11:38:13,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 119 transitions, 404 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-16 11:38:13,877 INFO L231 Difference]: Finished difference. Result has 134 places, 114 transitions, 376 flow [2022-11-16 11:38:13,878 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=376, PETRI_PLACES=134, PETRI_TRANSITIONS=114} [2022-11-16 11:38:13,879 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, 35 predicate places. [2022-11-16 11:38:13,880 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 114 transitions, 376 flow [2022-11-16 11:38:13,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 88.0) internal successors, (1584), 18 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:13,883 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:38:13,883 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:38:13,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2c6b4a-4c20-4ffa-bb19-3597a8f5d1c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:38:14,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2c6b4a-4c20-4ffa-bb19-3597a8f5d1c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:38:14,088 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:38:14,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:38:14,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1990750421, now seen corresponding path program 3 times [2022-11-16 11:38:14,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:38:14,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655486134] [2022-11-16 11:38:14,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:38:14,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:38:14,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:38:14,659 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:14,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:38:14,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655486134] [2022-11-16 11:38:14,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655486134] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:38:14,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310959994] [2022-11-16 11:38:14,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:38:14,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:38:14,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2c6b4a-4c20-4ffa-bb19-3597a8f5d1c3/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:38:14,663 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2c6b4a-4c20-4ffa-bb19-3597a8f5d1c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:38:14,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2c6b4a-4c20-4ffa-bb19-3597a8f5d1c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:38:14,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-16 11:38:14,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:38:14,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:38:14,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:38:14,932 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:14,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:38:15,306 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:15,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310959994] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:38:15,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:38:15,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 31 [2022-11-16 11:38:15,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438578862] [2022-11-16 11:38:15,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:38:15,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-16 11:38:15,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:38:15,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-16 11:38:15,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2022-11-16 11:38:15,315 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 101 [2022-11-16 11:38:15,319 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 114 transitions, 376 flow. Second operand has 31 states, 31 states have (on average 88.06451612903226) internal successors, (2730), 31 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:15,319 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:38:15,319 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 101 [2022-11-16 11:38:15,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:38:15,935 INFO L130 PetriNetUnfolder]: 3/186 cut-off events. [2022-11-16 11:38:15,935 INFO L131 PetriNetUnfolder]: For 236/236 co-relation queries the response was YES. [2022-11-16 11:38:15,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 186 events. 3/186 cut-off events. For 236/236 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 7/190 useless extension candidates. Maximal degree in co-relation 420. Up to 25 conditions per place. [2022-11-16 11:38:15,937 INFO L137 encePairwiseOnDemand]: 95/101 looper letters, 21 selfloop transitions, 42 changer transitions 0/147 dead transitions. [2022-11-16 11:38:15,938 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 147 transitions, 758 flow [2022-11-16 11:38:15,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-16 11:38:15,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-11-16 11:38:15,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3682 transitions. [2022-11-16 11:38:15,952 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8679867986798679 [2022-11-16 11:38:15,952 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 3682 transitions. [2022-11-16 11:38:15,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 3682 transitions. [2022-11-16 11:38:15,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:38:15,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 3682 transitions. [2022-11-16 11:38:15,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 87.66666666666667) internal successors, (3682), 42 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:15,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 101.0) internal successors, (4343), 43 states have internal predecessors, (4343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:15,977 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 101.0) internal successors, (4343), 43 states have internal predecessors, (4343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:15,977 INFO L175 Difference]: Start difference. First operand has 134 places, 114 transitions, 376 flow. Second operand 42 states and 3682 transitions. [2022-11-16 11:38:15,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 147 transitions, 758 flow [2022-11-16 11:38:15,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 147 transitions, 720 flow, removed 13 selfloop flow, removed 6 redundant places. [2022-11-16 11:38:15,990 INFO L231 Difference]: Finished difference. Result has 177 places, 136 transitions, 624 flow [2022-11-16 11:38:15,990 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=624, PETRI_PLACES=177, PETRI_TRANSITIONS=136} [2022-11-16 11:38:15,994 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, 78 predicate places. [2022-11-16 11:38:15,994 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 136 transitions, 624 flow [2022-11-16 11:38:15,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 88.06451612903226) internal successors, (2730), 31 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:15,996 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:38:15,996 INFO L209 CegarLoopForPetriNet]: trace histogram [14, 14, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:38:16,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2c6b4a-4c20-4ffa-bb19-3597a8f5d1c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:38:16,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2c6b4a-4c20-4ffa-bb19-3597a8f5d1c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:38:16,202 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:38:16,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:38:16,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1137169744, now seen corresponding path program 4 times [2022-11-16 11:38:16,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:38:16,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386097897] [2022-11-16 11:38:16,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:38:16,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:38:16,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:38:19,634 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:19,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:38:19,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386097897] [2022-11-16 11:38:19,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386097897] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:38:19,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464528677] [2022-11-16 11:38:19,635 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:38:19,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:38:19,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2c6b4a-4c20-4ffa-bb19-3597a8f5d1c3/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:38:19,638 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2c6b4a-4c20-4ffa-bb19-3597a8f5d1c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:38:19,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2c6b4a-4c20-4ffa-bb19-3597a8f5d1c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:38:19,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:38:19,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:38:19,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-16 11:38:19,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:38:24,891 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 486 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:24,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:38:30,720 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:30,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464528677] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:38:30,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:38:30,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 145 [2022-11-16 11:38:30,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982596450] [2022-11-16 11:38:30,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:38:30,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2022-11-16 11:38:30,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:38:30,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2022-11-16 11:38:30,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1256, Invalid=19624, Unknown=0, NotChecked=0, Total=20880 [2022-11-16 11:38:30,743 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 101 [2022-11-16 11:38:30,754 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 136 transitions, 624 flow. Second operand has 145 states, 145 states have (on average 70.2551724137931) internal successors, (10187), 145 states have internal predecessors, (10187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:30,755 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:38:30,755 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 101 [2022-11-16 11:38:30,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:44:21,634 INFO L130 PetriNetUnfolder]: 36273/130639 cut-off events. [2022-11-16 11:44:21,634 INFO L131 PetriNetUnfolder]: For 31721/31721 co-relation queries the response was YES. [2022-11-16 11:44:22,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213158 conditions, 130639 events. 36273/130639 cut-off events. For 31721/31721 co-relation queries the response was YES. Maximal size of possible extension queue 1895. Compared 1876021 event pairs, 0 based on Foata normal form. 0/120795 useless extension candidates. Maximal degree in co-relation 213138. Up to 18299 conditions per place. [2022-11-16 11:44:22,850 INFO L137 encePairwiseOnDemand]: 82/101 looper letters, 1459 selfloop transitions, 2232 changer transitions 1202/4993 dead transitions. [2022-11-16 11:44:22,851 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1204 places, 4993 transitions, 20120 flow [2022-11-16 11:44:22,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1028 states. [2022-11-16 11:44:22,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1028 states. [2022-11-16 11:44:22,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 75920 transitions. [2022-11-16 11:44:22,966 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7312093077011982 [2022-11-16 11:44:22,966 INFO L72 ComplementDD]: Start complementDD. Operand 1028 states and 75920 transitions. [2022-11-16 11:44:22,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 1028 states and 75920 transitions. [2022-11-16 11:44:23,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:44:23,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 1028 states and 75920 transitions. [2022-11-16 11:44:23,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 1029 states, 1028 states have (on average 73.852140077821) internal successors, (75920), 1028 states have internal predecessors, (75920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:23,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 1029 states, 1029 states have (on average 101.0) internal successors, (103929), 1029 states have internal predecessors, (103929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:23,375 INFO L81 ComplementDD]: Finished complementDD. Result has 1029 states, 1029 states have (on average 101.0) internal successors, (103929), 1029 states have internal predecessors, (103929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:23,375 INFO L175 Difference]: Start difference. First operand has 177 places, 136 transitions, 624 flow. Second operand 1028 states and 75920 transitions. [2022-11-16 11:44:23,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1204 places, 4993 transitions, 20120 flow [2022-11-16 11:44:23,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1186 places, 4993 transitions, 20066 flow, removed 9 selfloop flow, removed 18 redundant places. [2022-11-16 11:44:23,781 INFO L231 Difference]: Finished difference. Result has 1583 places, 2390 transitions, 10840 flow [2022-11-16 11:44:23,782 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=1028, PETRI_FLOW=10840, PETRI_PLACES=1583, PETRI_TRANSITIONS=2390} [2022-11-16 11:44:23,784 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, 1484 predicate places. [2022-11-16 11:44:23,785 INFO L495 AbstractCegarLoop]: Abstraction has has 1583 places, 2390 transitions, 10840 flow [2022-11-16 11:44:23,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 70.2551724137931) internal successors, (10187), 145 states have internal predecessors, (10187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:23,787 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:23,787 INFO L209 CegarLoopForPetriNet]: trace histogram [14, 14, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:23,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2c6b4a-4c20-4ffa-bb19-3597a8f5d1c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:44:23,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2c6b4a-4c20-4ffa-bb19-3597a8f5d1c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-16 11:44:23,993 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:23,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:23,994 INFO L85 PathProgramCache]: Analyzing trace with hash -53889680, now seen corresponding path program 1 times [2022-11-16 11:44:23,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:23,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27461028] [2022-11-16 11:44:23,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:23,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:24,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:27,627 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:27,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:27,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27461028] [2022-11-16 11:44:27,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27461028] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:27,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814499725] [2022-11-16 11:44:27,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:27,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:27,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2c6b4a-4c20-4ffa-bb19-3597a8f5d1c3/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:44:27,629 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2c6b4a-4c20-4ffa-bb19-3597a8f5d1c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:44:27,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2c6b4a-4c20-4ffa-bb19-3597a8f5d1c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:44:27,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:27,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-16 11:44:27,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:32,822 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 486 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:32,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:38,820 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:38,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814499725] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:44:38,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:44:38,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 153 [2022-11-16 11:44:38,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784734532] [2022-11-16 11:44:38,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:44:38,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2022-11-16 11:44:38,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:38,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2022-11-16 11:44:38,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=21981, Unknown=0, NotChecked=0, Total=23256 [2022-11-16 11:44:38,838 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 101 [2022-11-16 11:44:38,846 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1583 places, 2390 transitions, 10840 flow. Second operand has 153 states, 153 states have (on average 70.2483660130719) internal successors, (10748), 153 states have internal predecessors, (10748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:38,846 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:44:38,846 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 101 [2022-11-16 11:44:38,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand