./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c --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_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/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_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/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_23688497-805f-45e3-bfa6-04f57edd08cf/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 8978d351a1e877bd44e157215d417b40c01c7c886849af3efe046b60ddaacc95 --- 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 11:36:16,093 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:36:16,095 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:36:16,143 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:36:16,143 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:36:16,145 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:36:16,146 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:36:16,148 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:36:16,153 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:36:16,162 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:36:16,163 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:36:16,168 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:36:16,168 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:36:16,169 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:36:16,171 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:36:16,172 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:36:16,173 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:36:16,174 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:36:16,175 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:36:16,177 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:36:16,182 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:36:16,183 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:36:16,185 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:36:16,186 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:36:16,190 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:36:16,190 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:36:16,191 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:36:16,192 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:36:16,192 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:36:16,194 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:36:16,194 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:36:16,195 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:36:16,196 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:36:16,197 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:36:16,198 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:36:16,198 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:36:16,199 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:36:16,200 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:36:16,200 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:36:16,201 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:36:16,202 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:36:16,203 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:36:16,227 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:36:16,227 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:36:16,228 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:36:16,228 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:36:16,229 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:36:16,229 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:36:16,230 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:36:16,230 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:36:16,230 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:36:16,231 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:36:16,231 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:36:16,231 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:36:16,231 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:36:16,232 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:36:16,232 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:36:16,232 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:36:16,232 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:36:16,233 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:36:16,233 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:36:16,233 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:36:16,233 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:36:16,234 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:36:16,234 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:36:16,234 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:36:16,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:36:16,235 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:36:16,235 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:36:16,235 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:36:16,235 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:36:16,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:36:16,236 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:36:16,236 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:36:16,236 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:36:16,236 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_23688497-805f-45e3-bfa6-04f57edd08cf/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8978d351a1e877bd44e157215d417b40c01c7c886849af3efe046b60ddaacc95 [2022-11-16 11:36:16,500 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:36:16,532 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:36:16,534 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:36:16,536 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:36:16,537 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:36:16,538 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2022-11-16 11:36:16,615 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/data/209d90136/2d3037ddd9c740ae863ba3ca0ce20c3a/FLAG0eaaf3522 [2022-11-16 11:36:17,073 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:36:17,073 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2022-11-16 11:36:17,080 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/data/209d90136/2d3037ddd9c740ae863ba3ca0ce20c3a/FLAG0eaaf3522 [2022-11-16 11:36:17,441 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/data/209d90136/2d3037ddd9c740ae863ba3ca0ce20c3a [2022-11-16 11:36:17,444 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:36:17,445 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:36:17,447 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:36:17,447 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:36:17,451 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:36:17,452 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:36:17" (1/1) ... [2022-11-16 11:36:17,453 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63ec6425 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:17, skipping insertion in model container [2022-11-16 11:36:17,454 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:36:17" (1/1) ... [2022-11-16 11:36:17,461 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:36:17,478 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:36:17,695 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_23688497-805f-45e3-bfa6-04f57edd08cf/sv-benchmarks/c/weaver/popl20-figure3.wvr.c[2121,2134] [2022-11-16 11:36:17,699 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:36:17,708 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:36:17,729 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_23688497-805f-45e3-bfa6-04f57edd08cf/sv-benchmarks/c/weaver/popl20-figure3.wvr.c[2121,2134] [2022-11-16 11:36:17,730 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:36:17,745 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:36:17,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:17 WrapperNode [2022-11-16 11:36:17,746 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:36:17,747 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:36:17,747 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:36:17,748 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:36:17,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:17" (1/1) ... [2022-11-16 11:36:17,763 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:17" (1/1) ... [2022-11-16 11:36:17,794 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 72 [2022-11-16 11:36:17,794 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:36:17,795 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:36:17,796 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:36:17,796 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:36:17,805 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:17" (1/1) ... [2022-11-16 11:36:17,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:17" (1/1) ... [2022-11-16 11:36:17,820 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:17" (1/1) ... [2022-11-16 11:36:17,822 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:17" (1/1) ... [2022-11-16 11:36:17,826 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:17" (1/1) ... [2022-11-16 11:36:17,830 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:17" (1/1) ... [2022-11-16 11:36:17,832 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:17" (1/1) ... [2022-11-16 11:36:17,833 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:17" (1/1) ... [2022-11-16 11:36:17,835 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:36:17,839 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:36:17,839 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:36:17,839 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:36:17,840 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:17" (1/1) ... [2022-11-16 11:36:17,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:36:17,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:17,876 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:36:17,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:36:17,929 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:36:17,929 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 11:36:17,929 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 11:36:17,930 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 11:36:17,930 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 11:36:17,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:36:17,930 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:36:17,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:36:17,930 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 11:36:17,930 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 11:36:17,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:36:17,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:36:17,931 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:36:17,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:36:17,933 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 11:36:18,029 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:36:18,031 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:36:18,310 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:36:18,360 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:36:18,360 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 11:36:18,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:36:18 BoogieIcfgContainer [2022-11-16 11:36:18,364 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:36:18,366 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:36:18,366 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:36:18,385 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:36:18,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:36:17" (1/3) ... [2022-11-16 11:36:18,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@850c9eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:36:18, skipping insertion in model container [2022-11-16 11:36:18,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:17" (2/3) ... [2022-11-16 11:36:18,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@850c9eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:36:18, skipping insertion in model container [2022-11-16 11:36:18,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:36:18" (3/3) ... [2022-11-16 11:36:18,389 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2022-11-16 11:36:18,398 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 11:36:18,425 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:36:18,425 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:36:18,425 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 11:36:18,527 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 11:36:18,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 87 transitions, 190 flow [2022-11-16 11:36:18,621 INFO L130 PetriNetUnfolder]: 6/85 cut-off events. [2022-11-16 11:36:18,621 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 11:36:18,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 85 events. 6/85 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 50 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2022-11-16 11:36:18,627 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 87 transitions, 190 flow [2022-11-16 11:36:18,632 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 76 transitions, 164 flow [2022-11-16 11:36:18,643 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:36:18,650 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;@387ed619, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:36:18,651 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-16 11:36:18,675 INFO L130 PetriNetUnfolder]: 6/75 cut-off events. [2022-11-16 11:36:18,675 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 11:36:18,675 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:18,676 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] [2022-11-16 11:36:18,677 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 11:36:18,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:18,687 INFO L85 PathProgramCache]: Analyzing trace with hash 737481402, now seen corresponding path program 1 times [2022-11-16 11:36:18,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:18,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946662411] [2022-11-16 11:36:18,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:18,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:18,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:19,016 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 11:36:19,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:19,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946662411] [2022-11-16 11:36:19,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946662411] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:36:19,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:36:19,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:36:19,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876073632] [2022-11-16 11:36:19,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:36:19,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:36:19,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:19,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:36:19,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:36:19,082 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 87 [2022-11-16 11:36:19,085 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 76 transitions, 164 flow. Second operand has 2 states, 2 states have (on average 80.0) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 11:36:19,085 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:19,085 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 87 [2022-11-16 11:36:19,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:19,129 INFO L130 PetriNetUnfolder]: 5/83 cut-off events. [2022-11-16 11:36:19,130 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-11-16 11:36:19,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 83 events. 5/83 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 67 event pairs, 1 based on Foata normal form. 8/85 useless extension candidates. Maximal degree in co-relation 49. Up to 10 conditions per place. [2022-11-16 11:36:19,132 INFO L137 encePairwiseOnDemand]: 83/87 looper letters, 5 selfloop transitions, 0 changer transitions 2/72 dead transitions. [2022-11-16 11:36:19,132 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 72 transitions, 166 flow [2022-11-16 11:36:19,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:36:19,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 11:36:19,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 163 transitions. [2022-11-16 11:36:19,146 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9367816091954023 [2022-11-16 11:36:19,147 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 163 transitions. [2022-11-16 11:36:19,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 163 transitions. [2022-11-16 11:36:19,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:19,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 163 transitions. [2022-11-16 11:36:19,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 81.5) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states 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 11:36:19,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states 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 11:36:19,158 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states 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 11:36:19,160 INFO L175 Difference]: Start difference. First operand has 77 places, 76 transitions, 164 flow. Second operand 2 states and 163 transitions. [2022-11-16 11:36:19,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 72 transitions, 166 flow [2022-11-16 11:36:19,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 72 transitions, 158 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 11:36:19,167 INFO L231 Difference]: Finished difference. Result has 74 places, 70 transitions, 144 flow [2022-11-16 11:36:19,170 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=144, PETRI_PLACES=74, PETRI_TRANSITIONS=70} [2022-11-16 11:36:19,173 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, -3 predicate places. [2022-11-16 11:36:19,173 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 70 transitions, 144 flow [2022-11-16 11:36:19,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 80.0) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 11:36:19,174 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:19,174 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] [2022-11-16 11:36:19,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:36:19,175 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 11:36:19,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:19,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1997320056, now seen corresponding path program 1 times [2022-11-16 11:36:19,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:19,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508585401] [2022-11-16 11:36:19,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:19,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:19,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:19,791 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 11:36:19,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:19,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508585401] [2022-11-16 11:36:19,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508585401] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:36:19,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:36:19,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:36:19,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439060733] [2022-11-16 11:36:19,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:36:19,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:36:19,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:19,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:36:19,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:36:19,806 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-11-16 11:36:19,806 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 70 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states 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 11:36:19,806 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:19,807 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-11-16 11:36:19,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:19,957 INFO L130 PetriNetUnfolder]: 8/111 cut-off events. [2022-11-16 11:36:19,958 INFO L131 PetriNetUnfolder]: For 6/7 co-relation queries the response was YES. [2022-11-16 11:36:19,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 111 events. 8/111 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 184 event pairs, 1 based on Foata normal form. 4/107 useless extension candidates. Maximal degree in co-relation 144. Up to 19 conditions per place. [2022-11-16 11:36:19,962 INFO L137 encePairwiseOnDemand]: 81/87 looper letters, 15 selfloop transitions, 2 changer transitions 5/77 dead transitions. [2022-11-16 11:36:19,963 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 77 transitions, 205 flow [2022-11-16 11:36:19,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:36:19,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 11:36:19,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 349 transitions. [2022-11-16 11:36:19,973 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8022988505747126 [2022-11-16 11:36:19,974 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 349 transitions. [2022-11-16 11:36:19,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 349 transitions. [2022-11-16 11:36:19,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:19,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 349 transitions. [2022-11-16 11:36:19,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 69.8) internal successors, (349), 5 states have internal predecessors, (349), 0 states have call successors, (0), 0 states 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 11:36:19,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 87.0) internal successors, (522), 6 states have internal predecessors, (522), 0 states have call successors, (0), 0 states 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 11:36:19,986 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 87.0) internal successors, (522), 6 states have internal predecessors, (522), 0 states have call successors, (0), 0 states 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 11:36:19,986 INFO L175 Difference]: Start difference. First operand has 74 places, 70 transitions, 144 flow. Second operand 5 states and 349 transitions. [2022-11-16 11:36:19,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 77 transitions, 205 flow [2022-11-16 11:36:19,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 77 transitions, 205 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:36:19,992 INFO L231 Difference]: Finished difference. Result has 79 places, 71 transitions, 162 flow [2022-11-16 11:36:19,993 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=162, PETRI_PLACES=79, PETRI_TRANSITIONS=71} [2022-11-16 11:36:19,993 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 2 predicate places. [2022-11-16 11:36:19,994 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 71 transitions, 162 flow [2022-11-16 11:36:19,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states 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 11:36:19,995 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:19,996 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, 1] [2022-11-16 11:36:19,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:36:19,997 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 11:36:20,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:20,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1767965212, now seen corresponding path program 1 times [2022-11-16 11:36:20,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:20,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867839443] [2022-11-16 11:36:20,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:20,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:20,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:20,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:20,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:20,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867839443] [2022-11-16 11:36:20,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867839443] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:36:20,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:36:20,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:36:20,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839232868] [2022-11-16 11:36:20,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:36:20,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:36:20,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:20,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:36:20,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:36:20,253 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-11-16 11:36:20,255 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 71 transitions, 162 flow. Second operand has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states 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 11:36:20,255 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:20,255 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-11-16 11:36:20,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:20,518 INFO L130 PetriNetUnfolder]: 76/289 cut-off events. [2022-11-16 11:36:20,518 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-11-16 11:36:20,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 503 conditions, 289 events. 76/289 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1273 event pairs, 32 based on Foata normal form. 0/254 useless extension candidates. Maximal degree in co-relation 496. Up to 89 conditions per place. [2022-11-16 11:36:20,525 INFO L137 encePairwiseOnDemand]: 80/87 looper letters, 28 selfloop transitions, 5 changer transitions 4/91 dead transitions. [2022-11-16 11:36:20,526 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 91 transitions, 283 flow [2022-11-16 11:36:20,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:36:20,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-16 11:36:20,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 429 transitions. [2022-11-16 11:36:20,530 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8218390804597702 [2022-11-16 11:36:20,530 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 429 transitions. [2022-11-16 11:36:20,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 429 transitions. [2022-11-16 11:36:20,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:20,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 429 transitions. [2022-11-16 11:36:20,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.5) internal successors, (429), 6 states have internal predecessors, (429), 0 states have call successors, (0), 0 states 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 11:36:20,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states 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 11:36:20,535 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states 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 11:36:20,535 INFO L175 Difference]: Start difference. First operand has 79 places, 71 transitions, 162 flow. Second operand 6 states and 429 transitions. [2022-11-16 11:36:20,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 91 transitions, 283 flow [2022-11-16 11:36:20,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 91 transitions, 277 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-16 11:36:20,538 INFO L231 Difference]: Finished difference. Result has 82 places, 73 transitions, 184 flow [2022-11-16 11:36:20,539 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=184, PETRI_PLACES=82, PETRI_TRANSITIONS=73} [2022-11-16 11:36:20,540 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 5 predicate places. [2022-11-16 11:36:20,540 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 73 transitions, 184 flow [2022-11-16 11:36:20,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states 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 11:36:20,540 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:20,541 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, 1] [2022-11-16 11:36:20,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 11:36:20,541 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 11:36:20,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:20,542 INFO L85 PathProgramCache]: Analyzing trace with hash 929170576, now seen corresponding path program 2 times [2022-11-16 11:36:20,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:20,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693984930] [2022-11-16 11:36:20,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:20,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:20,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:20,781 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 11:36:20,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:20,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693984930] [2022-11-16 11:36:20,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693984930] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:20,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566528058] [2022-11-16 11:36:20,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:36:20,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:20,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:20,787 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:20,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:36:20,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:36:20,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:36:20,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 11:36:20,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:21,099 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 11:36:21,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:21,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:21,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566528058] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:21,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:36:21,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2022-11-16 11:36:21,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137814153] [2022-11-16 11:36:21,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:36:21,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:36:21,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:21,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:36:21,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:36:21,219 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 87 [2022-11-16 11:36:21,220 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 73 transitions, 184 flow. Second operand has 4 states, 4 states have (on average 70.5) internal successors, (282), 4 states have internal predecessors, (282), 0 states have call successors, (0), 0 states 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 11:36:21,220 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:21,220 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 87 [2022-11-16 11:36:21,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:21,333 INFO L130 PetriNetUnfolder]: 53/239 cut-off events. [2022-11-16 11:36:21,333 INFO L131 PetriNetUnfolder]: For 109/113 co-relation queries the response was YES. [2022-11-16 11:36:21,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 465 conditions, 239 events. 53/239 cut-off events. For 109/113 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1009 event pairs, 16 based on Foata normal form. 4/236 useless extension candidates. Maximal degree in co-relation 457. Up to 59 conditions per place. [2022-11-16 11:36:21,336 INFO L137 encePairwiseOnDemand]: 82/87 looper letters, 18 selfloop transitions, 6 changer transitions 4/85 dead transitions. [2022-11-16 11:36:21,336 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 85 transitions, 283 flow [2022-11-16 11:36:21,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:36:21,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-16 11:36:21,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 299 transitions. [2022-11-16 11:36:21,338 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8591954022988506 [2022-11-16 11:36:21,344 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 299 transitions. [2022-11-16 11:36:21,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 299 transitions. [2022-11-16 11:36:21,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:21,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 299 transitions. [2022-11-16 11:36:21,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 74.75) internal successors, (299), 4 states have internal predecessors, (299), 0 states have call successors, (0), 0 states 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 11:36:21,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states 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 11:36:21,348 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states 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 11:36:21,348 INFO L175 Difference]: Start difference. First operand has 82 places, 73 transitions, 184 flow. Second operand 4 states and 299 transitions. [2022-11-16 11:36:21,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 85 transitions, 283 flow [2022-11-16 11:36:21,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 85 transitions, 270 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-11-16 11:36:21,355 INFO L231 Difference]: Finished difference. Result has 84 places, 77 transitions, 220 flow [2022-11-16 11:36:21,356 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=220, PETRI_PLACES=84, PETRI_TRANSITIONS=77} [2022-11-16 11:36:21,357 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 7 predicate places. [2022-11-16 11:36:21,358 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 77 transitions, 220 flow [2022-11-16 11:36:21,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.5) internal successors, (282), 4 states have internal predecessors, (282), 0 states have call successors, (0), 0 states 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 11:36:21,358 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:21,359 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, 1] [2022-11-16 11:36:21,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:21,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:21,565 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 11:36:21,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:21,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1285977232, now seen corresponding path program 3 times [2022-11-16 11:36:21,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:21,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62703647] [2022-11-16 11:36:21,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:21,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:21,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:21,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:21,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:21,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62703647] [2022-11-16 11:36:21,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62703647] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:21,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980550637] [2022-11-16 11:36:21,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:36:21,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:21,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:21,839 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:21,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:36:21,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 11:36:21,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:36:21,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 11:36:21,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:22,034 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 11:36:22,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:22,136 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 11:36:22,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980550637] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:22,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:36:22,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-11-16 11:36:22,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464944023] [2022-11-16 11:36:22,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:22,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:36:22,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:22,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:36:22,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:36:22,140 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-11-16 11:36:22,141 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 77 transitions, 220 flow. Second operand has 9 states, 9 states have (on average 67.55555555555556) internal successors, (608), 9 states have internal predecessors, (608), 0 states have call successors, (0), 0 states 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 11:36:22,141 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:22,141 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-11-16 11:36:22,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:22,402 INFO L130 PetriNetUnfolder]: 98/349 cut-off events. [2022-11-16 11:36:22,403 INFO L131 PetriNetUnfolder]: For 295/295 co-relation queries the response was YES. [2022-11-16 11:36:22,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 812 conditions, 349 events. 98/349 cut-off events. For 295/295 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1614 event pairs, 21 based on Foata normal form. 9/353 useless extension candidates. Maximal degree in co-relation 803. Up to 67 conditions per place. [2022-11-16 11:36:22,405 INFO L137 encePairwiseOnDemand]: 79/87 looper letters, 40 selfloop transitions, 17 changer transitions 7/118 dead transitions. [2022-11-16 11:36:22,406 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 118 transitions, 508 flow [2022-11-16 11:36:22,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:36:22,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-16 11:36:22,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 582 transitions. [2022-11-16 11:36:22,410 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8362068965517241 [2022-11-16 11:36:22,410 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 582 transitions. [2022-11-16 11:36:22,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 582 transitions. [2022-11-16 11:36:22,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:22,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 582 transitions. [2022-11-16 11:36:22,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 72.75) internal successors, (582), 8 states have internal predecessors, (582), 0 states have call successors, (0), 0 states 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 11:36:22,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:22,415 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:22,416 INFO L175 Difference]: Start difference. First operand has 84 places, 77 transitions, 220 flow. Second operand 8 states and 582 transitions. [2022-11-16 11:36:22,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 118 transitions, 508 flow [2022-11-16 11:36:22,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 118 transitions, 508 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:36:22,425 INFO L231 Difference]: Finished difference. Result has 95 places, 88 transitions, 350 flow [2022-11-16 11:36:22,425 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=350, PETRI_PLACES=95, PETRI_TRANSITIONS=88} [2022-11-16 11:36:22,428 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 18 predicate places. [2022-11-16 11:36:22,428 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 88 transitions, 350 flow [2022-11-16 11:36:22,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 67.55555555555556) internal successors, (608), 9 states have internal predecessors, (608), 0 states have call successors, (0), 0 states 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 11:36:22,429 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:22,429 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, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:22,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:22,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:22,635 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 11:36:22,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:22,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1621783018, now seen corresponding path program 1 times [2022-11-16 11:36:22,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:22,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567010101] [2022-11-16 11:36:22,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:22,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:22,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:22,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:22,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:22,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567010101] [2022-11-16 11:36:22,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567010101] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:22,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529041872] [2022-11-16 11:36:22,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:22,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:22,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:22,900 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:22,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:36:22,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:22,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:36:22,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:23,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:23,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:23,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:23,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529041872] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:23,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:36:23,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-11-16 11:36:23,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674957037] [2022-11-16 11:36:23,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:23,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:36:23,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:23,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:36:23,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:36:23,361 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 87 [2022-11-16 11:36:23,362 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 88 transitions, 350 flow. Second operand has 10 states, 10 states have (on average 62.3) internal successors, (623), 10 states have internal predecessors, (623), 0 states have call successors, (0), 0 states 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 11:36:23,362 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:23,362 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 87 [2022-11-16 11:36:23,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:23,589 INFO L130 PetriNetUnfolder]: 77/429 cut-off events. [2022-11-16 11:36:23,589 INFO L131 PetriNetUnfolder]: For 627/646 co-relation queries the response was YES. [2022-11-16 11:36:23,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1078 conditions, 429 events. 77/429 cut-off events. For 627/646 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2258 event pairs, 13 based on Foata normal form. 14/431 useless extension candidates. Maximal degree in co-relation 1065. Up to 74 conditions per place. [2022-11-16 11:36:23,593 INFO L137 encePairwiseOnDemand]: 80/87 looper letters, 46 selfloop transitions, 8 changer transitions 9/120 dead transitions. [2022-11-16 11:36:23,593 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 120 transitions, 608 flow [2022-11-16 11:36:23,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:36:23,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 11:36:23,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 459 transitions. [2022-11-16 11:36:23,596 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7536945812807881 [2022-11-16 11:36:23,596 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 459 transitions. [2022-11-16 11:36:23,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 459 transitions. [2022-11-16 11:36:23,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:23,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 459 transitions. [2022-11-16 11:36:23,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 65.57142857142857) internal successors, (459), 7 states have internal predecessors, (459), 0 states have call successors, (0), 0 states 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 11:36:23,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states 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 11:36:23,599 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states 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 11:36:23,600 INFO L175 Difference]: Start difference. First operand has 95 places, 88 transitions, 350 flow. Second operand 7 states and 459 transitions. [2022-11-16 11:36:23,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 120 transitions, 608 flow [2022-11-16 11:36:23,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 120 transitions, 561 flow, removed 17 selfloop flow, removed 3 redundant places. [2022-11-16 11:36:23,605 INFO L231 Difference]: Finished difference. Result has 101 places, 91 transitions, 365 flow [2022-11-16 11:36:23,606 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=365, PETRI_PLACES=101, PETRI_TRANSITIONS=91} [2022-11-16 11:36:23,606 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 24 predicate places. [2022-11-16 11:36:23,606 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 91 transitions, 365 flow [2022-11-16 11:36:23,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 62.3) internal successors, (623), 10 states have internal predecessors, (623), 0 states have call successors, (0), 0 states 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 11:36:23,607 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:23,607 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:23,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:23,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:23,813 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 11:36:23,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:23,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1614141052, now seen corresponding path program 2 times [2022-11-16 11:36:23,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:23,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641937807] [2022-11-16 11:36:23,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:23,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:23,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:24,083 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:24,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:24,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641937807] [2022-11-16 11:36:24,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641937807] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:24,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216628860] [2022-11-16 11:36:24,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:36:24,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:24,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:24,085 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:24,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:36:24,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:36:24,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:36:24,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:36:24,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:24,372 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:24,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:24,543 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:24,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216628860] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:24,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:36:24,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-11-16 11:36:24,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422128773] [2022-11-16 11:36:24,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:24,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 11:36:24,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:24,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 11:36:24,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:36:24,548 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-11-16 11:36:24,550 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 91 transitions, 365 flow. Second operand has 16 states, 16 states have (on average 65.8125) internal successors, (1053), 16 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states 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 11:36:24,550 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:24,550 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-11-16 11:36:24,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:26,390 INFO L130 PetriNetUnfolder]: 438/1179 cut-off events. [2022-11-16 11:36:26,390 INFO L131 PetriNetUnfolder]: For 1737/1753 co-relation queries the response was YES. [2022-11-16 11:36:26,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3502 conditions, 1179 events. 438/1179 cut-off events. For 1737/1753 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 7378 event pairs, 23 based on Foata normal form. 20/1190 useless extension candidates. Maximal degree in co-relation 3486. Up to 139 conditions per place. [2022-11-16 11:36:26,402 INFO L137 encePairwiseOnDemand]: 75/87 looper letters, 125 selfloop transitions, 134 changer transitions 9/322 dead transitions. [2022-11-16 11:36:26,402 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 322 transitions, 2209 flow [2022-11-16 11:36:26,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-16 11:36:26,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-11-16 11:36:26,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3177 transitions. [2022-11-16 11:36:26,410 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.776962582538518 [2022-11-16 11:36:26,411 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3177 transitions. [2022-11-16 11:36:26,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3177 transitions. [2022-11-16 11:36:26,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:26,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3177 transitions. [2022-11-16 11:36:26,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 67.59574468085107) internal successors, (3177), 47 states have internal predecessors, (3177), 0 states have call successors, (0), 0 states 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 11:36:26,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 87.0) internal successors, (4176), 48 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states 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 11:36:26,434 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 87.0) internal successors, (4176), 48 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states 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 11:36:26,434 INFO L175 Difference]: Start difference. First operand has 101 places, 91 transitions, 365 flow. Second operand 47 states and 3177 transitions. [2022-11-16 11:36:26,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 322 transitions, 2209 flow [2022-11-16 11:36:26,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 322 transitions, 2169 flow, removed 19 selfloop flow, removed 3 redundant places. [2022-11-16 11:36:26,447 INFO L231 Difference]: Finished difference. Result has 165 places, 221 transitions, 1621 flow [2022-11-16 11:36:26,448 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=1621, PETRI_PLACES=165, PETRI_TRANSITIONS=221} [2022-11-16 11:36:26,449 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 88 predicate places. [2022-11-16 11:36:26,449 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 221 transitions, 1621 flow [2022-11-16 11:36:26,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 65.8125) internal successors, (1053), 16 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states 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 11:36:26,450 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:26,450 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:26,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-16 11:36:26,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:26,656 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:26,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:26,656 INFO L85 PathProgramCache]: Analyzing trace with hash -599658512, now seen corresponding path program 3 times [2022-11-16 11:36:26,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:26,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800950194] [2022-11-16 11:36:26,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:26,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:26,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:26,945 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:26,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:26,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800950194] [2022-11-16 11:36:26,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800950194] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:26,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022116463] [2022-11-16 11:36:26,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:36:26,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:26,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:26,947 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:26,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:36:27,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 11:36:27,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:36:27,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:36:27,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:27,180 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:27,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:27,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:27,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022116463] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:27,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:36:27,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-11-16 11:36:27,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310500971] [2022-11-16 11:36:27,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:27,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 11:36:27,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:27,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 11:36:27,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:36:27,353 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-11-16 11:36:27,354 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 221 transitions, 1621 flow. Second operand has 17 states, 17 states have (on average 65.41176470588235) internal successors, (1112), 17 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states 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 11:36:27,354 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:27,354 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-11-16 11:36:27,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:28,881 INFO L130 PetriNetUnfolder]: 512/1429 cut-off events. [2022-11-16 11:36:28,882 INFO L131 PetriNetUnfolder]: For 6442/6451 co-relation queries the response was YES. [2022-11-16 11:36:28,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6017 conditions, 1429 events. 512/1429 cut-off events. For 6442/6451 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 9496 event pairs, 28 based on Foata normal form. 9/1424 useless extension candidates. Maximal degree in co-relation 5979. Up to 220 conditions per place. [2022-11-16 11:36:28,896 INFO L137 encePairwiseOnDemand]: 73/87 looper letters, 187 selfloop transitions, 127 changer transitions 33/401 dead transitions. [2022-11-16 11:36:28,897 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 401 transitions, 3964 flow [2022-11-16 11:36:28,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-16 11:36:28,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-11-16 11:36:28,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2574 transitions. [2022-11-16 11:36:28,905 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.778584392014519 [2022-11-16 11:36:28,905 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2574 transitions. [2022-11-16 11:36:28,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2574 transitions. [2022-11-16 11:36:28,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:28,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2574 transitions. [2022-11-16 11:36:28,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 67.73684210526316) internal successors, (2574), 38 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states 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 11:36:28,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 87.0) internal successors, (3393), 39 states have internal predecessors, (3393), 0 states have call successors, (0), 0 states 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 11:36:28,925 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 87.0) internal successors, (3393), 39 states have internal predecessors, (3393), 0 states have call successors, (0), 0 states 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 11:36:28,925 INFO L175 Difference]: Start difference. First operand has 165 places, 221 transitions, 1621 flow. Second operand 38 states and 2574 transitions. [2022-11-16 11:36:28,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 401 transitions, 3964 flow [2022-11-16 11:36:28,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 401 transitions, 3750 flow, removed 53 selfloop flow, removed 3 redundant places. [2022-11-16 11:36:28,968 INFO L231 Difference]: Finished difference. Result has 221 places, 282 transitions, 2348 flow [2022-11-16 11:36:28,968 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1489, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=2348, PETRI_PLACES=221, PETRI_TRANSITIONS=282} [2022-11-16 11:36:28,970 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 144 predicate places. [2022-11-16 11:36:28,971 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 282 transitions, 2348 flow [2022-11-16 11:36:28,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 65.41176470588235) internal successors, (1112), 17 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states 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 11:36:28,972 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:28,972 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:28,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:29,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-16 11:36:29,183 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:29,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:29,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1672607078, now seen corresponding path program 4 times [2022-11-16 11:36:29,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:29,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788091518] [2022-11-16 11:36:29,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:29,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:29,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:29,475 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:29,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:29,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788091518] [2022-11-16 11:36:29,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788091518] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:29,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744435445] [2022-11-16 11:36:29,476 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:36:29,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:29,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:29,478 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:29,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:36:29,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:36:29,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:36:29,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:36:29,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:29,686 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:29,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:29,898 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:29,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744435445] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:29,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:36:29,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-11-16 11:36:29,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556049904] [2022-11-16 11:36:29,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:29,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 11:36:29,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:29,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 11:36:29,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:36:29,902 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-11-16 11:36:29,904 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 282 transitions, 2348 flow. Second operand has 17 states, 17 states have (on average 65.3529411764706) internal successors, (1111), 17 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states 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 11:36:29,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:29,905 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-11-16 11:36:29,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:30,951 INFO L130 PetriNetUnfolder]: 554/1484 cut-off events. [2022-11-16 11:36:30,952 INFO L131 PetriNetUnfolder]: For 9619/9629 co-relation queries the response was YES. [2022-11-16 11:36:30,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6897 conditions, 1484 events. 554/1484 cut-off events. For 9619/9629 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 9607 event pairs, 58 based on Foata normal form. 8/1482 useless extension candidates. Maximal degree in co-relation 6836. Up to 327 conditions per place. [2022-11-16 11:36:30,969 INFO L137 encePairwiseOnDemand]: 74/87 looper letters, 215 selfloop transitions, 132 changer transitions 4/405 dead transitions. [2022-11-16 11:36:30,970 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 405 transitions, 4223 flow [2022-11-16 11:36:30,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 11:36:30,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-16 11:36:30,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1357 transitions. [2022-11-16 11:36:30,973 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7798850574712644 [2022-11-16 11:36:30,973 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1357 transitions. [2022-11-16 11:36:30,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1357 transitions. [2022-11-16 11:36:30,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:30,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1357 transitions. [2022-11-16 11:36:30,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 67.85) internal successors, (1357), 20 states have internal predecessors, (1357), 0 states have call successors, (0), 0 states 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 11:36:30,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 87.0) internal successors, (1827), 21 states have internal predecessors, (1827), 0 states have call successors, (0), 0 states 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 11:36:30,989 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 87.0) internal successors, (1827), 21 states have internal predecessors, (1827), 0 states have call successors, (0), 0 states 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 11:36:30,990 INFO L175 Difference]: Start difference. First operand has 221 places, 282 transitions, 2348 flow. Second operand 20 states and 1357 transitions. [2022-11-16 11:36:30,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 405 transitions, 4223 flow [2022-11-16 11:36:31,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 405 transitions, 4106 flow, removed 50 selfloop flow, removed 5 redundant places. [2022-11-16 11:36:31,069 INFO L231 Difference]: Finished difference. Result has 238 places, 323 transitions, 3073 flow [2022-11-16 11:36:31,069 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2244, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3073, PETRI_PLACES=238, PETRI_TRANSITIONS=323} [2022-11-16 11:36:31,070 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 161 predicate places. [2022-11-16 11:36:31,071 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 323 transitions, 3073 flow [2022-11-16 11:36:31,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 65.3529411764706) internal successors, (1111), 17 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states 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 11:36:31,072 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:31,072 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:31,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:31,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:31,278 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:31,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:31,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1100984054, now seen corresponding path program 5 times [2022-11-16 11:36:31,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:31,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327663225] [2022-11-16 11:36:31,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:31,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:31,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:31,573 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:31,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:31,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327663225] [2022-11-16 11:36:31,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327663225] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:31,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315312071] [2022-11-16 11:36:31,574 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:36:31,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:31,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:31,579 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:31,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:36:31,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:36:31,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:36:31,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 11:36:31,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:31,954 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:31,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:32,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:32,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315312071] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:32,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:36:32,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-11-16 11:36:32,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450609403] [2022-11-16 11:36:32,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:32,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 11:36:32,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:32,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 11:36:32,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-11-16 11:36:32,269 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-11-16 11:36:32,271 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 323 transitions, 3073 flow. Second operand has 23 states, 23 states have (on average 65.34782608695652) internal successors, (1503), 23 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:32,271 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:32,271 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-11-16 11:36:32,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:37,656 INFO L130 PetriNetUnfolder]: 969/2742 cut-off events. [2022-11-16 11:36:37,656 INFO L131 PetriNetUnfolder]: For 24540/24550 co-relation queries the response was YES. [2022-11-16 11:36:37,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13553 conditions, 2742 events. 969/2742 cut-off events. For 24540/24550 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 22190 event pairs, 14 based on Foata normal form. 25/2762 useless extension candidates. Maximal degree in co-relation 13485. Up to 240 conditions per place. [2022-11-16 11:36:37,690 INFO L137 encePairwiseOnDemand]: 72/87 looper letters, 199 selfloop transitions, 424 changer transitions 7/684 dead transitions. [2022-11-16 11:36:37,690 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 684 transitions, 8044 flow [2022-11-16 11:36:37,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-11-16 11:36:37,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2022-11-16 11:36:37,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 5488 transitions. [2022-11-16 11:36:37,701 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.769273899635548 [2022-11-16 11:36:37,702 INFO L72 ComplementDD]: Start complementDD. Operand 82 states and 5488 transitions. [2022-11-16 11:36:37,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 82 states and 5488 transitions. [2022-11-16 11:36:37,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:37,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 82 states and 5488 transitions. [2022-11-16 11:36:37,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 83 states, 82 states have (on average 66.92682926829268) internal successors, (5488), 82 states have internal predecessors, (5488), 0 states have call successors, (0), 0 states 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 11:36:37,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 83 states, 83 states have (on average 87.0) internal successors, (7221), 83 states have internal predecessors, (7221), 0 states have call successors, (0), 0 states 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 11:36:37,730 INFO L81 ComplementDD]: Finished complementDD. Result has 83 states, 83 states have (on average 87.0) internal successors, (7221), 83 states have internal predecessors, (7221), 0 states have call successors, (0), 0 states 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 11:36:37,730 INFO L175 Difference]: Start difference. First operand has 238 places, 323 transitions, 3073 flow. Second operand 82 states and 5488 transitions. [2022-11-16 11:36:37,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 684 transitions, 8044 flow [2022-11-16 11:36:37,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 684 transitions, 7744 flow, removed 139 selfloop flow, removed 3 redundant places. [2022-11-16 11:36:37,970 INFO L231 Difference]: Finished difference. Result has 345 places, 546 transitions, 6691 flow [2022-11-16 11:36:37,971 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2982, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=82, PETRI_FLOW=6691, PETRI_PLACES=345, PETRI_TRANSITIONS=546} [2022-11-16 11:36:37,972 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 268 predicate places. [2022-11-16 11:36:37,972 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 546 transitions, 6691 flow [2022-11-16 11:36:37,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 65.34782608695652) internal successors, (1503), 23 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:37,990 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:37,990 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:38,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:38,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 11:36:38,204 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:38,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:38,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1529433744, now seen corresponding path program 6 times [2022-11-16 11:36:38,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:38,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999450019] [2022-11-16 11:36:38,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:38,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:38,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:38,451 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:38,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:38,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999450019] [2022-11-16 11:36:38,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999450019] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:38,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322619788] [2022-11-16 11:36:38,452 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:36:38,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:38,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:38,454 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:38,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:36:38,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-16 11:36:38,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:36:38,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:36:38,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:38,736 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:38,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:38,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:38,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322619788] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:38,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:36:38,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-16 11:36:38,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696721920] [2022-11-16 11:36:38,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:38,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:36:38,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:38,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:36:38,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:36:38,925 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-11-16 11:36:38,927 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 546 transitions, 6691 flow. Second operand has 18 states, 18 states have (on average 65.66666666666667) internal successors, (1182), 18 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states 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 11:36:38,927 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:38,927 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-11-16 11:36:38,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:42,517 INFO L130 PetriNetUnfolder]: 1258/3522 cut-off events. [2022-11-16 11:36:42,518 INFO L131 PetriNetUnfolder]: For 67036/67049 co-relation queries the response was YES. [2022-11-16 11:36:42,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21925 conditions, 3522 events. 1258/3522 cut-off events. For 67036/67049 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 30388 event pairs, 73 based on Foata normal form. 22/3512 useless extension candidates. Maximal degree in co-relation 21825. Up to 461 conditions per place. [2022-11-16 11:36:42,589 INFO L137 encePairwiseOnDemand]: 75/87 looper letters, 256 selfloop transitions, 545 changer transitions 3/858 dead transitions. [2022-11-16 11:36:42,589 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 858 transitions, 12576 flow [2022-11-16 11:36:42,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-16 11:36:42,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2022-11-16 11:36:42,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 4167 transitions. [2022-11-16 11:36:42,597 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7725250278086763 [2022-11-16 11:36:42,597 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 4167 transitions. [2022-11-16 11:36:42,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 4167 transitions. [2022-11-16 11:36:42,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:42,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 4167 transitions. [2022-11-16 11:36:42,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 67.20967741935483) internal successors, (4167), 62 states have internal predecessors, (4167), 0 states have call successors, (0), 0 states 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 11:36:42,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 87.0) internal successors, (5481), 63 states have internal predecessors, (5481), 0 states have call successors, (0), 0 states 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 11:36:42,618 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 87.0) internal successors, (5481), 63 states have internal predecessors, (5481), 0 states have call successors, (0), 0 states 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 11:36:42,618 INFO L175 Difference]: Start difference. First operand has 345 places, 546 transitions, 6691 flow. Second operand 62 states and 4167 transitions. [2022-11-16 11:36:42,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 858 transitions, 12576 flow [2022-11-16 11:36:43,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 858 transitions, 11255 flow, removed 536 selfloop flow, removed 5 redundant places. [2022-11-16 11:36:43,143 INFO L231 Difference]: Finished difference. Result has 426 places, 747 transitions, 9922 flow [2022-11-16 11:36:43,144 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=5864, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=344, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=9922, PETRI_PLACES=426, PETRI_TRANSITIONS=747} [2022-11-16 11:36:43,144 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 349 predicate places. [2022-11-16 11:36:43,144 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 747 transitions, 9922 flow [2022-11-16 11:36:43,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 65.66666666666667) internal successors, (1182), 18 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states 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 11:36:43,145 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:43,145 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:43,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:43,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 11:36:43,356 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:43,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:43,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1087988590, now seen corresponding path program 7 times [2022-11-16 11:36:43,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:43,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801669800] [2022-11-16 11:36:43,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:43,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:43,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:43,668 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:43,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:43,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801669800] [2022-11-16 11:36:43,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801669800] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:43,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517383049] [2022-11-16 11:36:43,669 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:36:43,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:43,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:43,671 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:43,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 11:36:43,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:43,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:36:43,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:43,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:43,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:44,089 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:44,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517383049] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:44,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:36:44,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-11-16 11:36:44,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960189873] [2022-11-16 11:36:44,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:44,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 11:36:44,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:44,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 11:36:44,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-11-16 11:36:44,094 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-11-16 11:36:44,095 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 747 transitions, 9922 flow. Second operand has 19 states, 19 states have (on average 65.3157894736842) internal successors, (1241), 19 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states 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 11:36:44,095 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:44,095 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-11-16 11:36:44,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:47,368 INFO L130 PetriNetUnfolder]: 1410/3941 cut-off events. [2022-11-16 11:36:47,368 INFO L131 PetriNetUnfolder]: For 71858/71870 co-relation queries the response was YES. [2022-11-16 11:36:47,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25105 conditions, 3941 events. 1410/3941 cut-off events. For 71858/71870 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 35192 event pairs, 26 based on Foata normal form. 11/3931 useless extension candidates. Maximal degree in co-relation 24982. Up to 356 conditions per place. [2022-11-16 11:36:47,421 INFO L137 encePairwiseOnDemand]: 73/87 looper letters, 313 selfloop transitions, 622 changer transitions 10/999 dead transitions. [2022-11-16 11:36:47,422 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 999 transitions, 15588 flow [2022-11-16 11:36:47,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-16 11:36:47,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2022-11-16 11:36:47,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 4174 transitions. [2022-11-16 11:36:47,429 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7738227660363367 [2022-11-16 11:36:47,430 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 4174 transitions. [2022-11-16 11:36:47,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 4174 transitions. [2022-11-16 11:36:47,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:47,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 4174 transitions. [2022-11-16 11:36:47,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 67.3225806451613) internal successors, (4174), 62 states have internal predecessors, (4174), 0 states have call successors, (0), 0 states 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 11:36:47,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 87.0) internal successors, (5481), 63 states have internal predecessors, (5481), 0 states have call successors, (0), 0 states 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 11:36:47,450 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 87.0) internal successors, (5481), 63 states have internal predecessors, (5481), 0 states have call successors, (0), 0 states 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 11:36:47,450 INFO L175 Difference]: Start difference. First operand has 426 places, 747 transitions, 9922 flow. Second operand 62 states and 4174 transitions. [2022-11-16 11:36:47,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 999 transitions, 15588 flow [2022-11-16 11:36:48,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 999 transitions, 14812 flow, removed 240 selfloop flow, removed 16 redundant places. [2022-11-16 11:36:48,159 INFO L231 Difference]: Finished difference. Result has 480 places, 874 transitions, 12977 flow [2022-11-16 11:36:48,160 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=9395, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=486, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=12977, PETRI_PLACES=480, PETRI_TRANSITIONS=874} [2022-11-16 11:36:48,161 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 403 predicate places. [2022-11-16 11:36:48,161 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 874 transitions, 12977 flow [2022-11-16 11:36:48,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.3157894736842) internal successors, (1241), 19 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states 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 11:36:48,162 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:48,162 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:48,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:48,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:48,368 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:48,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:48,369 INFO L85 PathProgramCache]: Analyzing trace with hash -612377338, now seen corresponding path program 8 times [2022-11-16 11:36:48,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:48,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138907589] [2022-11-16 11:36:48,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:48,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:48,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:48,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:48,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:48,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138907589] [2022-11-16 11:36:48,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138907589] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:48,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640872398] [2022-11-16 11:36:48,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:36:48,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:48,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:48,667 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:48,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 11:36:48,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:36:48,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:36:48,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:36:48,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:48,921 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:48,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:49,111 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:49,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640872398] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:49,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:36:49,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-11-16 11:36:49,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800272913] [2022-11-16 11:36:49,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:49,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 11:36:49,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:49,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 11:36:49,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-11-16 11:36:49,115 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-11-16 11:36:49,117 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 874 transitions, 12977 flow. Second operand has 19 states, 19 states have (on average 65.63157894736842) internal successors, (1247), 19 states have internal predecessors, (1247), 0 states have call successors, (0), 0 states 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 11:36:49,117 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:49,117 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-11-16 11:36:49,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:54,058 INFO L130 PetriNetUnfolder]: 1918/5412 cut-off events. [2022-11-16 11:36:54,058 INFO L131 PetriNetUnfolder]: For 81116/81131 co-relation queries the response was YES. [2022-11-16 11:36:54,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35187 conditions, 5412 events. 1918/5412 cut-off events. For 81116/81131 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 52749 event pairs, 101 based on Foata normal form. 25/5402 useless extension candidates. Maximal degree in co-relation 35060. Up to 625 conditions per place. [2022-11-16 11:36:54,136 INFO L137 encePairwiseOnDemand]: 75/87 looper letters, 265 selfloop transitions, 1014 changer transitions 10/1343 dead transitions. [2022-11-16 11:36:54,136 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 555 places, 1343 transitions, 22865 flow [2022-11-16 11:36:54,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-11-16 11:36:54,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2022-11-16 11:36:54,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 5259 transitions. [2022-11-16 11:36:54,146 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7651680488869489 [2022-11-16 11:36:54,147 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 5259 transitions. [2022-11-16 11:36:54,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 5259 transitions. [2022-11-16 11:36:54,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:54,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 5259 transitions. [2022-11-16 11:36:54,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 66.56962025316456) internal successors, (5259), 79 states have internal predecessors, (5259), 0 states have call successors, (0), 0 states 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 11:36:54,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 87.0) internal successors, (6960), 80 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states 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 11:36:54,172 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 87.0) internal successors, (6960), 80 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states 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 11:36:54,172 INFO L175 Difference]: Start difference. First operand has 480 places, 874 transitions, 12977 flow. Second operand 79 states and 5259 transitions. [2022-11-16 11:36:54,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 555 places, 1343 transitions, 22865 flow [2022-11-16 11:36:55,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 1343 transitions, 22178 flow, removed 117 selfloop flow, removed 19 redundant places. [2022-11-16 11:36:55,402 INFO L231 Difference]: Finished difference. Result has 555 places, 1239 transitions, 21337 flow [2022-11-16 11:36:55,403 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=12497, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=874, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=661, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=21337, PETRI_PLACES=555, PETRI_TRANSITIONS=1239} [2022-11-16 11:36:55,404 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 478 predicate places. [2022-11-16 11:36:55,404 INFO L495 AbstractCegarLoop]: Abstraction has has 555 places, 1239 transitions, 21337 flow [2022-11-16 11:36:55,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.63157894736842) internal successors, (1247), 19 states have internal predecessors, (1247), 0 states have call successors, (0), 0 states 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 11:36:55,405 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:55,405 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:55,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:55,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 11:36:55,612 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:55,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:55,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1076858264, now seen corresponding path program 9 times [2022-11-16 11:36:55,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:55,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097896931] [2022-11-16 11:36:55,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:55,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:55,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:55,978 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:55,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:55,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097896931] [2022-11-16 11:36:55,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097896931] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:55,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254128734] [2022-11-16 11:36:55,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:36:55,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:55,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:55,981 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:55,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 11:36:56,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 11:36:56,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:36:56,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:36:56,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:56,273 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:56,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:56,491 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:56,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254128734] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:56,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:36:56,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-16 11:36:56,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963150139] [2022-11-16 11:36:56,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:56,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:36:56,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:56,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:36:56,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:36:56,496 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-11-16 11:36:56,498 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 555 places, 1239 transitions, 21337 flow. Second operand has 18 states, 18 states have (on average 65.33333333333333) internal successors, (1176), 18 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:56,498 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:56,498 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-11-16 11:36:56,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:37:01,141 INFO L130 PetriNetUnfolder]: 2075/5728 cut-off events. [2022-11-16 11:37:01,141 INFO L131 PetriNetUnfolder]: For 104972/104993 co-relation queries the response was YES. [2022-11-16 11:37:01,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41403 conditions, 5728 events. 2075/5728 cut-off events. For 104972/104993 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 55703 event pairs, 416 based on Foata normal form. 16/5610 useless extension candidates. Maximal degree in co-relation 41257. Up to 1835 conditions per place. [2022-11-16 11:37:01,278 INFO L137 encePairwiseOnDemand]: 74/87 looper letters, 916 selfloop transitions, 524 changer transitions 7/1501 dead transitions. [2022-11-16 11:37:01,278 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 595 places, 1501 transitions, 28362 flow [2022-11-16 11:37:01,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-16 11:37:01,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-11-16 11:37:01,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2758 transitions. [2022-11-16 11:37:01,285 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7731987664704233 [2022-11-16 11:37:01,285 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2758 transitions. [2022-11-16 11:37:01,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2758 transitions. [2022-11-16 11:37:01,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:37:01,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2758 transitions. [2022-11-16 11:37:01,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 67.26829268292683) internal successors, (2758), 41 states have internal predecessors, (2758), 0 states have call successors, (0), 0 states 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 11:37:01,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 87.0) internal successors, (3654), 42 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states 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 11:37:01,302 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 87.0) internal successors, (3654), 42 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states 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 11:37:01,302 INFO L175 Difference]: Start difference. First operand has 555 places, 1239 transitions, 21337 flow. Second operand 41 states and 2758 transitions. [2022-11-16 11:37:01,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 595 places, 1501 transitions, 28362 flow [2022-11-16 11:37:03,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 572 places, 1501 transitions, 27903 flow, removed 85 selfloop flow, removed 23 redundant places. [2022-11-16 11:37:03,147 INFO L231 Difference]: Finished difference. Result has 587 places, 1381 transitions, 25203 flow [2022-11-16 11:37:03,148 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=20975, PETRI_DIFFERENCE_MINUEND_PLACES=532, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=392, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=785, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=25203, PETRI_PLACES=587, PETRI_TRANSITIONS=1381} [2022-11-16 11:37:03,149 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 510 predicate places. [2022-11-16 11:37:03,149 INFO L495 AbstractCegarLoop]: Abstraction has has 587 places, 1381 transitions, 25203 flow [2022-11-16 11:37:03,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 65.33333333333333) internal successors, (1176), 18 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:03,149 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:37:03,149 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:03,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-16 11:37:03,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:37:03,350 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:37:03,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:03,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1181251824, now seen corresponding path program 10 times [2022-11-16 11:37:03,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:03,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311766794] [2022-11-16 11:37:03,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:03,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:03,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:03,630 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:03,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:03,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311766794] [2022-11-16 11:37:03,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311766794] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:37:03,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961874086] [2022-11-16 11:37:03,631 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:37:03,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:37:03,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:37:03,633 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:37:03,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 11:37:03,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:37:03,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:37:03,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:37:03,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:03,960 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:03,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:37:04,136 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:04,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961874086] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:37:04,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:37:04,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-16 11:37:04,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737548834] [2022-11-16 11:37:04,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:37:04,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:37:04,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:04,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:37:04,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:37:04,140 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-11-16 11:37:04,141 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 587 places, 1381 transitions, 25203 flow. Second operand has 18 states, 18 states have (on average 65.22222222222223) internal successors, (1174), 18 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states 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 11:37:04,141 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:37:04,141 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-11-16 11:37:04,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:37:14,042 INFO L130 PetriNetUnfolder]: 3507/9718 cut-off events. [2022-11-16 11:37:14,043 INFO L131 PetriNetUnfolder]: For 192567/192592 co-relation queries the response was YES. [2022-11-16 11:37:14,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72514 conditions, 9718 events. 3507/9718 cut-off events. For 192567/192592 co-relation queries the response was YES. Maximal size of possible extension queue 675. Compared 102692 event pairs, 237 based on Foata normal form. 21/9592 useless extension candidates. Maximal degree in co-relation 72359. Up to 1284 conditions per place. [2022-11-16 11:37:14,213 INFO L137 encePairwiseOnDemand]: 73/87 looper letters, 783 selfloop transitions, 1747 changer transitions 7/2591 dead transitions. [2022-11-16 11:37:14,213 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 674 places, 2591 transitions, 53564 flow [2022-11-16 11:37:14,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-11-16 11:37:14,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2022-11-16 11:37:14,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 6267 transitions. [2022-11-16 11:37:14,222 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7663242846661775 [2022-11-16 11:37:14,222 INFO L72 ComplementDD]: Start complementDD. Operand 94 states and 6267 transitions. [2022-11-16 11:37:14,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 94 states and 6267 transitions. [2022-11-16 11:37:14,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:37:14,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 94 states and 6267 transitions. [2022-11-16 11:37:14,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 95 states, 94 states have (on average 66.67021276595744) internal successors, (6267), 94 states have internal predecessors, (6267), 0 states have call successors, (0), 0 states 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 11:37:14,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 95 states, 95 states have (on average 87.0) internal successors, (8265), 95 states have internal predecessors, (8265), 0 states have call successors, (0), 0 states 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 11:37:14,248 INFO L81 ComplementDD]: Finished complementDD. Result has 95 states, 95 states have (on average 87.0) internal successors, (8265), 95 states have internal predecessors, (8265), 0 states have call successors, (0), 0 states 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 11:37:14,248 INFO L175 Difference]: Start difference. First operand has 587 places, 1381 transitions, 25203 flow. Second operand 94 states and 6267 transitions. [2022-11-16 11:37:14,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 674 places, 2591 transitions, 53564 flow [2022-11-16 11:37:17,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 652 places, 2591 transitions, 53006 flow, removed 164 selfloop flow, removed 22 redundant places. [2022-11-16 11:37:17,539 INFO L231 Difference]: Finished difference. Result has 687 places, 2396 transitions, 51066 flow [2022-11-16 11:37:17,540 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=24818, PETRI_DIFFERENCE_MINUEND_PLACES=559, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=833, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=94, PETRI_FLOW=51066, PETRI_PLACES=687, PETRI_TRANSITIONS=2396} [2022-11-16 11:37:17,540 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 610 predicate places. [2022-11-16 11:37:17,540 INFO L495 AbstractCegarLoop]: Abstraction has has 687 places, 2396 transitions, 51066 flow [2022-11-16 11:37:17,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 65.22222222222223) internal successors, (1174), 18 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states 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 11:37:17,541 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:37:17,541 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:17,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 11:37:17,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 11:37:17,742 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:37:17,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:17,742 INFO L85 PathProgramCache]: Analyzing trace with hash 450900834, now seen corresponding path program 11 times [2022-11-16 11:37:17,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:17,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768229114] [2022-11-16 11:37:17,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:17,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:17,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:17,983 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:17,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:17,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768229114] [2022-11-16 11:37:17,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768229114] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:37:17,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729380015] [2022-11-16 11:37:17,984 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:37:17,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:37:17,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:37:17,986 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:37:18,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 11:37:18,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-16 11:37:18,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:37:18,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 11:37:18,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:18,259 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:18,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:37:18,571 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:18,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729380015] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:37:18,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:37:18,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-11-16 11:37:18,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571895210] [2022-11-16 11:37:18,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:37:18,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 11:37:18,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:18,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 11:37:18,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-11-16 11:37:18,576 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-11-16 11:37:18,577 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 687 places, 2396 transitions, 51066 flow. Second operand has 22 states, 22 states have (on average 65.13636363636364) internal successors, (1433), 22 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states 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 11:37:18,577 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:37:18,577 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-11-16 11:37:18,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:37:34,785 INFO L130 PetriNetUnfolder]: 4552/12889 cut-off events. [2022-11-16 11:37:34,786 INFO L131 PetriNetUnfolder]: For 334949/334974 co-relation queries the response was YES. [2022-11-16 11:37:35,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103866 conditions, 12889 events. 4552/12889 cut-off events. For 334949/334974 co-relation queries the response was YES. Maximal size of possible extension queue 936. Compared 145848 event pairs, 345 based on Foata normal form. 31/12674 useless extension candidates. Maximal degree in co-relation 103687. Up to 2346 conditions per place. [2022-11-16 11:37:35,103 INFO L137 encePairwiseOnDemand]: 73/87 looper letters, 801 selfloop transitions, 2306 changer transitions 8/3169 dead transitions. [2022-11-16 11:37:35,104 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 769 places, 3169 transitions, 73642 flow [2022-11-16 11:37:35,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-11-16 11:37:35,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2022-11-16 11:37:35,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 5635 transitions. [2022-11-16 11:37:35,117 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7710727969348659 [2022-11-16 11:37:35,117 INFO L72 ComplementDD]: Start complementDD. Operand 84 states and 5635 transitions. [2022-11-16 11:37:35,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 84 states and 5635 transitions. [2022-11-16 11:37:35,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:37:35,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 84 states and 5635 transitions. [2022-11-16 11:37:35,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 85 states, 84 states have (on average 67.08333333333333) internal successors, (5635), 84 states have internal predecessors, (5635), 0 states have call successors, (0), 0 states 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 11:37:35,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 85 states, 85 states have (on average 87.0) internal successors, (7395), 85 states have internal predecessors, (7395), 0 states have call successors, (0), 0 states 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 11:37:35,140 INFO L81 ComplementDD]: Finished complementDD. Result has 85 states, 85 states have (on average 87.0) internal successors, (7395), 85 states have internal predecessors, (7395), 0 states have call successors, (0), 0 states 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 11:37:35,141 INFO L175 Difference]: Start difference. First operand has 687 places, 2396 transitions, 51066 flow. Second operand 84 states and 5635 transitions. [2022-11-16 11:37:35,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 769 places, 3169 transitions, 73642 flow [2022-11-16 11:37:43,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 764 places, 3169 transitions, 71664 flow, removed 961 selfloop flow, removed 5 redundant places. [2022-11-16 11:37:44,072 INFO L231 Difference]: Finished difference. Result has 787 places, 2972 transitions, 70704 flow [2022-11-16 11:37:44,074 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=49568, PETRI_DIFFERENCE_MINUEND_PLACES=681, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1746, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=84, PETRI_FLOW=70704, PETRI_PLACES=787, PETRI_TRANSITIONS=2972} [2022-11-16 11:37:44,075 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 710 predicate places. [2022-11-16 11:37:44,075 INFO L495 AbstractCegarLoop]: Abstraction has has 787 places, 2972 transitions, 70704 flow [2022-11-16 11:37:44,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 65.13636363636364) internal successors, (1433), 22 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states 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 11:37:44,076 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:37:44,076 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:44,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 11:37:44,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 11:37:44,286 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:37:44,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:44,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1175898666, now seen corresponding path program 12 times [2022-11-16 11:37:44,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:44,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987504074] [2022-11-16 11:37:44,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:44,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:44,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:44,552 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:44,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:44,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987504074] [2022-11-16 11:37:44,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987504074] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:37:44,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408485211] [2022-11-16 11:37:44,552 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:37:44,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:37:44,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:37:44,555 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:37:44,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 11:37:44,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-16 11:37:44,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:37:44,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:37:44,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:44,748 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:44,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:37:44,921 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:44,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408485211] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:37:44,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:37:44,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-11-16 11:37:44,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243192379] [2022-11-16 11:37:44,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:37:44,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 11:37:44,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:44,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 11:37:44,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-11-16 11:37:44,924 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-11-16 11:37:44,925 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 787 places, 2972 transitions, 70704 flow. Second operand has 19 states, 19 states have (on average 65.21052631578948) internal successors, (1239), 19 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:44,925 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:37:44,925 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-11-16 11:37:44,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:38:05,355 INFO L130 PetriNetUnfolder]: 4930/14295 cut-off events. [2022-11-16 11:38:05,355 INFO L131 PetriNetUnfolder]: For 380931/380958 co-relation queries the response was YES. [2022-11-16 11:38:05,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119020 conditions, 14295 events. 4930/14295 cut-off events. For 380931/380958 co-relation queries the response was YES. Maximal size of possible extension queue 1097. Compared 166860 event pairs, 490 based on Foata normal form. 59/14147 useless extension candidates. Maximal degree in co-relation 118818. Up to 1993 conditions per place. [2022-11-16 11:38:05,701 INFO L137 encePairwiseOnDemand]: 75/87 looper letters, 679 selfloop transitions, 2711 changer transitions 0/3444 dead transitions. [2022-11-16 11:38:05,701 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 914 places, 3444 transitions, 87489 flow [2022-11-16 11:38:05,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-11-16 11:38:05,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2022-11-16 11:38:05,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 8662 transitions. [2022-11-16 11:38:05,711 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7658709106984969 [2022-11-16 11:38:05,711 INFO L72 ComplementDD]: Start complementDD. Operand 130 states and 8662 transitions. [2022-11-16 11:38:05,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 130 states and 8662 transitions. [2022-11-16 11:38:05,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:38:05,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 130 states and 8662 transitions. [2022-11-16 11:38:05,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 131 states, 130 states have (on average 66.63076923076923) internal successors, (8662), 130 states have internal predecessors, (8662), 0 states have call successors, (0), 0 states 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 11:38:05,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 131 states, 131 states have (on average 87.0) internal successors, (11397), 131 states have internal predecessors, (11397), 0 states have call successors, (0), 0 states 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 11:38:05,743 INFO L81 ComplementDD]: Finished complementDD. Result has 131 states, 131 states have (on average 87.0) internal successors, (11397), 131 states have internal predecessors, (11397), 0 states have call successors, (0), 0 states 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 11:38:05,744 INFO L175 Difference]: Start difference. First operand has 787 places, 2972 transitions, 70704 flow. Second operand 130 states and 8662 transitions. [2022-11-16 11:38:05,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 914 places, 3444 transitions, 87489 flow [2022-11-16 11:38:14,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 879 places, 3444 transitions, 85379 flow, removed 227 selfloop flow, removed 35 redundant places. [2022-11-16 11:38:14,509 INFO L231 Difference]: Finished difference. Result has 901 places, 3280 transitions, 84447 flow [2022-11-16 11:38:14,512 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=68751, PETRI_DIFFERENCE_MINUEND_PLACES=750, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2972, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2429, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=130, PETRI_FLOW=84447, PETRI_PLACES=901, PETRI_TRANSITIONS=3280} [2022-11-16 11:38:14,513 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 824 predicate places. [2022-11-16 11:38:14,513 INFO L495 AbstractCegarLoop]: Abstraction has has 901 places, 3280 transitions, 84447 flow [2022-11-16 11:38:14,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.21052631578948) internal successors, (1239), 19 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:14,513 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:38:14,514 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:38:14,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 11:38:14,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 11:38:14,719 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:38:14,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:38:14,719 INFO L85 PathProgramCache]: Analyzing trace with hash -434350950, now seen corresponding path program 13 times [2022-11-16 11:38:14,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:38:14,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118482943] [2022-11-16 11:38:14,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:38:14,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:38:14,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:38:14,962 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:14,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:38:14,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118482943] [2022-11-16 11:38:14,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118482943] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:38:14,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565336868] [2022-11-16 11:38:14,962 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:38:14,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:38:14,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:38:14,964 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:38:14,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 11:38:15,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:38:15,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:38:15,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:38:15,213 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:15,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:38:15,408 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:15,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565336868] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:38:15,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:38:15,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-16 11:38:15,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76983505] [2022-11-16 11:38:15,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:38:15,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:38:15,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:38:15,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:38:15,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:38:15,411 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-11-16 11:38:15,412 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 901 places, 3280 transitions, 84447 flow. Second operand has 18 states, 18 states have (on average 65.72222222222223) internal successors, (1183), 18 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states 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 11:38:15,412 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:38:15,412 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-11-16 11:38:15,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:38:40,189 INFO L130 PetriNetUnfolder]: 5819/16625 cut-off events. [2022-11-16 11:38:40,190 INFO L131 PetriNetUnfolder]: For 494985/495032 co-relation queries the response was YES. [2022-11-16 11:38:40,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148600 conditions, 16625 events. 5819/16625 cut-off events. For 494985/495032 co-relation queries the response was YES. Maximal size of possible extension queue 1262. Compared 198896 event pairs, 474 based on Foata normal form. 50/16388 useless extension candidates. Maximal degree in co-relation 148387. Up to 2750 conditions per place. [2022-11-16 11:38:40,733 INFO L137 encePairwiseOnDemand]: 75/87 looper letters, 921 selfloop transitions, 3224 changer transitions 2/4201 dead transitions. [2022-11-16 11:38:40,733 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 975 places, 4201 transitions, 115599 flow [2022-11-16 11:38:40,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-11-16 11:38:40,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-11-16 11:38:40,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 5026 transitions. [2022-11-16 11:38:40,740 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7702681992337165 [2022-11-16 11:38:40,740 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 5026 transitions. [2022-11-16 11:38:40,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 5026 transitions. [2022-11-16 11:38:40,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:38:40,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 5026 transitions. [2022-11-16 11:38:40,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 67.01333333333334) internal successors, (5026), 75 states have internal predecessors, (5026), 0 states have call successors, (0), 0 states 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 11:38:40,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 87.0) internal successors, (6612), 76 states have internal predecessors, (6612), 0 states have call successors, (0), 0 states 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 11:38:40,758 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 87.0) internal successors, (6612), 76 states have internal predecessors, (6612), 0 states have call successors, (0), 0 states 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 11:38:40,759 INFO L175 Difference]: Start difference. First operand has 901 places, 3280 transitions, 84447 flow. Second operand 75 states and 5026 transitions. [2022-11-16 11:38:40,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 975 places, 4201 transitions, 115599 flow [2022-11-16 11:38:55,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 926 places, 4201 transitions, 112960 flow, removed 227 selfloop flow, removed 49 redundant places. [2022-11-16 11:38:55,675 INFO L231 Difference]: Finished difference. Result has 953 places, 4086 transitions, 114443 flow [2022-11-16 11:38:55,677 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=82372, PETRI_DIFFERENCE_MINUEND_PLACES=852, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2418, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=114443, PETRI_PLACES=953, PETRI_TRANSITIONS=4086} [2022-11-16 11:38:55,677 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 876 predicate places. [2022-11-16 11:38:55,678 INFO L495 AbstractCegarLoop]: Abstraction has has 953 places, 4086 transitions, 114443 flow [2022-11-16 11:38:55,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 65.72222222222223) internal successors, (1183), 18 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states 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 11:38:55,678 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:38:55,678 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:38:55,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 11:38:55,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 11:38:55,879 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:38:55,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:38:55,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1640046212, now seen corresponding path program 14 times [2022-11-16 11:38:55,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:38:55,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011673451] [2022-11-16 11:38:55,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:38:55,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:38:55,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:38:56,155 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:56,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:38:56,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011673451] [2022-11-16 11:38:56,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011673451] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:38:56,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344441165] [2022-11-16 11:38:56,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:38:56,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:38:56,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:38:56,159 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:38:56,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23688497-805f-45e3-bfa6-04f57edd08cf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 11:38:56,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:38:56,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:38:56,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:38:56,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:38:56,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:56,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:38:56,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:56,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344441165] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:38:56,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:38:56,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-11-16 11:38:56,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043501109] [2022-11-16 11:38:56,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:38:56,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 11:38:56,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:38:56,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 11:38:56,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-11-16 11:38:56,667 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-11-16 11:38:56,668 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 953 places, 4086 transitions, 114443 flow. Second operand has 19 states, 19 states have (on average 65.6842105263158) internal successors, (1248), 19 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states 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 11:38:56,668 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:38:56,668 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-11-16 11:38:56,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:39:35,142 INFO L130 PetriNetUnfolder]: 6791/19322 cut-off events. [2022-11-16 11:39:35,142 INFO L131 PetriNetUnfolder]: For 669170/669222 co-relation queries the response was YES. [2022-11-16 11:39:35,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184045 conditions, 19322 events. 6791/19322 cut-off events. For 669170/669222 co-relation queries the response was YES. Maximal size of possible extension queue 1511. Compared 237497 event pairs, 329 based on Foata normal form. 64/19240 useless extension candidates. Maximal degree in co-relation 183812. Up to 2830 conditions per place. [2022-11-16 11:39:35,826 INFO L137 encePairwiseOnDemand]: 75/87 looper letters, 1031 selfloop transitions, 3943 changer transitions 16/5044 dead transitions. [2022-11-16 11:39:35,827 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1085 places, 5044 transitions, 149960 flow [2022-11-16 11:39:35,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-11-16 11:39:35,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2022-11-16 11:39:35,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 8823 transitions. [2022-11-16 11:39:35,839 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7625097225823179 [2022-11-16 11:39:35,839 INFO L72 ComplementDD]: Start complementDD. Operand 133 states and 8823 transitions. [2022-11-16 11:39:35,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 133 states and 8823 transitions. [2022-11-16 11:39:35,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:39:35,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 133 states and 8823 transitions. [2022-11-16 11:39:35,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 134 states, 133 states have (on average 66.33834586466165) internal successors, (8823), 133 states have internal predecessors, (8823), 0 states have call successors, (0), 0 states 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 11:39:35,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 134 states, 134 states have (on average 87.0) internal successors, (11658), 134 states have internal predecessors, (11658), 0 states have call successors, (0), 0 states 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 11:39:35,874 INFO L81 ComplementDD]: Finished complementDD. Result has 134 states, 134 states have (on average 87.0) internal successors, (11658), 134 states have internal predecessors, (11658), 0 states have call successors, (0), 0 states 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 11:39:35,874 INFO L175 Difference]: Start difference. First operand has 953 places, 4086 transitions, 114443 flow. Second operand 133 states and 8823 transitions. [2022-11-16 11:39:35,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1085 places, 5044 transitions, 149960 flow