./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/mult-comm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/mult-comm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a0efdc82161997cbf03fd7c104a0f7adcc3337af1f91e29fd2b7831e9d52958e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 20:31:28,117 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:31:28,120 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:31:28,186 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:31:28,187 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:31:28,192 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:31:28,195 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:31:28,201 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:31:28,204 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:31:28,211 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:31:28,212 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:31:28,215 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:31:28,216 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:31:28,219 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:31:28,221 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:31:28,224 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:31:28,226 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:31:28,227 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:31:28,229 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:31:28,238 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:31:28,240 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:31:28,242 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:31:28,246 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:31:28,248 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:31:28,256 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:31:28,257 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:31:28,257 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:31:28,260 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:31:28,260 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:31:28,262 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:31:28,262 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:31:28,264 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:31:28,266 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:31:28,268 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:31:28,270 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:31:28,270 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:31:28,271 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:31:28,272 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:31:28,272 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:31:28,273 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:31:28,274 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:31:28,275 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:31:28,330 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:31:28,331 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:31:28,332 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:31:28,332 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:31:28,333 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:31:28,333 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:31:28,334 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:31:28,335 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:31:28,335 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:31:28,335 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:31:28,337 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:31:28,337 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:31:28,337 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:31:28,338 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:31:28,338 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:31:28,338 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:31:28,339 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:31:28,339 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:31:28,339 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:31:28,340 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:31:28,340 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:31:28,340 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:31:28,341 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:31:28,341 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:31:28,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:31:28,342 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:31:28,344 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:31:28,344 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:31:28,344 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:31:28,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:31:28,345 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:31:28,345 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:31:28,346 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:31:28,346 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_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0efdc82161997cbf03fd7c104a0f7adcc3337af1f91e29fd2b7831e9d52958e [2022-11-02 20:31:28,672 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:31:28,721 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:31:28,727 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:31:28,728 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:31:28,729 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:31:28,731 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/weaver/mult-comm.wvr.c [2022-11-02 20:31:28,831 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/data/376f962b9/ed06cec1a2834ffc9e11b9b2ee86917b/FLAG6dace2c55 [2022-11-02 20:31:29,393 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:31:29,394 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/sv-benchmarks/c/weaver/mult-comm.wvr.c [2022-11-02 20:31:29,404 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/data/376f962b9/ed06cec1a2834ffc9e11b9b2ee86917b/FLAG6dace2c55 [2022-11-02 20:31:29,743 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/data/376f962b9/ed06cec1a2834ffc9e11b9b2ee86917b [2022-11-02 20:31:29,746 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:31:29,748 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:31:29,753 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:31:29,753 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:31:29,758 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:31:29,759 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:31:29" (1/1) ... [2022-11-02 20:31:29,760 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b676b0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:31:29, skipping insertion in model container [2022-11-02 20:31:29,761 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:31:29" (1/1) ... [2022-11-02 20:31:29,770 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:31:29,788 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:31:30,018 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/sv-benchmarks/c/weaver/mult-comm.wvr.c[1910,1923] [2022-11-02 20:31:30,023 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:31:30,063 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:31:30,091 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/sv-benchmarks/c/weaver/mult-comm.wvr.c[1910,1923] [2022-11-02 20:31:30,093 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:31:30,110 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:31:30,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:31:30 WrapperNode [2022-11-02 20:31:30,111 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:31:30,112 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:31:30,113 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:31:30,113 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:31:30,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:31:30" (1/1) ... [2022-11-02 20:31:30,131 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:31:30" (1/1) ... [2022-11-02 20:31:30,152 INFO L138 Inliner]: procedures = 21, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 52 [2022-11-02 20:31:30,152 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:31:30,153 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:31:30,154 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:31:30,154 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:31:30,164 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:31:30" (1/1) ... [2022-11-02 20:31:30,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:31:30" (1/1) ... [2022-11-02 20:31:30,167 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:31:30" (1/1) ... [2022-11-02 20:31:30,168 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:31:30" (1/1) ... [2022-11-02 20:31:30,173 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:31:30" (1/1) ... [2022-11-02 20:31:30,178 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:31:30" (1/1) ... [2022-11-02 20:31:30,179 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:31:30" (1/1) ... [2022-11-02 20:31:30,181 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:31:30" (1/1) ... [2022-11-02 20:31:30,183 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:31:30,184 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:31:30,184 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:31:30,185 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:31:30,186 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:31:30" (1/1) ... [2022-11-02 20:31:30,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:31:30,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:31:30,228 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:31:30,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:31:30,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:31:30,293 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-02 20:31:30,293 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-02 20:31:30,293 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-02 20:31:30,293 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-02 20:31:30,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:31:30,294 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:31:30,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:31:30,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:31:30,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:31:30,297 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:31:30,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:31:30,299 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-02 20:31:30,403 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:31:30,405 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:31:30,597 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:31:30,606 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:31:30,607 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-02 20:31:30,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:31:30 BoogieIcfgContainer [2022-11-02 20:31:30,610 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:31:30,612 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:31:30,613 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:31:30,617 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:31:30,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:31:29" (1/3) ... [2022-11-02 20:31:30,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1068d32f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:31:30, skipping insertion in model container [2022-11-02 20:31:30,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:31:30" (2/3) ... [2022-11-02 20:31:30,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1068d32f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:31:30, skipping insertion in model container [2022-11-02 20:31:30,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:31:30" (3/3) ... [2022-11-02 20:31:30,622 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-comm.wvr.c [2022-11-02 20:31:30,633 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-02 20:31:30,646 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:31:30,647 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:31:30,647 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-02 20:31:30,768 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-02 20:31:30,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 80 transitions, 176 flow [2022-11-02 20:31:30,915 INFO L130 PetriNetUnfolder]: 5/78 cut-off events. [2022-11-02 20:31:30,915 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-02 20:31:30,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 78 events. 5/78 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2022-11-02 20:31:30,920 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 80 transitions, 176 flow [2022-11-02 20:31:30,926 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 69 transitions, 150 flow [2022-11-02 20:31:30,940 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:31:30,950 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;@649cec5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:31:30,950 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-02 20:31:30,982 INFO L130 PetriNetUnfolder]: 5/68 cut-off events. [2022-11-02 20:31:30,983 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-02 20:31:30,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:31:30,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:31:30,985 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:31:30,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:31:30,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1061161231, now seen corresponding path program 1 times [2022-11-02 20:31:31,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:31:31,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278522375] [2022-11-02 20:31:31,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:31,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:31:31,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:32,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:32,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:31:32,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278522375] [2022-11-02 20:31:32,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278522375] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:31:32,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:31:32,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:31:32,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078364893] [2022-11-02 20:31:32,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:31:32,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:31:32,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:31:32,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:31:32,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:31:32,256 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 80 [2022-11-02 20:31:32,260 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 150 flow. Second operand has 6 states, 6 states have (on average 64.66666666666667) internal successors, (388), 6 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:32,261 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:31:32,261 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 80 [2022-11-02 20:31:32,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:31:32,514 INFO L130 PetriNetUnfolder]: 12/134 cut-off events. [2022-11-02 20:31:32,515 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2022-11-02 20:31:32,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 134 events. 12/134 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 316 event pairs, 1 based on Foata normal form. 16/141 useless extension candidates. Maximal degree in co-relation 69. Up to 19 conditions per place. [2022-11-02 20:31:32,521 INFO L137 encePairwiseOnDemand]: 69/80 looper letters, 19 selfloop transitions, 5 changer transitions 7/84 dead transitions. [2022-11-02 20:31:32,524 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 84 transitions, 257 flow [2022-11-02 20:31:32,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:31:32,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-02 20:31:32,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 545 transitions. [2022-11-02 20:31:32,554 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8515625 [2022-11-02 20:31:32,555 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 545 transitions. [2022-11-02 20:31:32,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 545 transitions. [2022-11-02 20:31:32,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:31:32,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 545 transitions. [2022-11-02 20:31:32,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 68.125) internal successors, (545), 8 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:32,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 80.0) internal successors, (720), 9 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:32,597 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 80.0) internal successors, (720), 9 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:32,600 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 150 flow. Second operand 8 states and 545 transitions. [2022-11-02 20:31:32,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 84 transitions, 257 flow [2022-11-02 20:31:32,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 84 transitions, 239 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-02 20:31:32,623 INFO L231 Difference]: Finished difference. Result has 77 places, 68 transitions, 163 flow [2022-11-02 20:31:32,627 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=163, PETRI_PLACES=77, PETRI_TRANSITIONS=68} [2022-11-02 20:31:32,634 INFO L287 CegarLoopForPetriNet]: 71 programPoint places, 6 predicate places. [2022-11-02 20:31:32,634 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 68 transitions, 163 flow [2022-11-02 20:31:32,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 64.66666666666667) internal successors, (388), 6 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:32,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:31:32,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:31:32,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:31:32,637 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:31:32,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:31:32,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1469955165, now seen corresponding path program 1 times [2022-11-02 20:31:32,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:31:32,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858397775] [2022-11-02 20:31:32,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:32,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:31:32,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:33,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:33,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:31:33,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858397775] [2022-11-02 20:31:33,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858397775] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:31:33,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218387517] [2022-11-02 20:31:33,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:33,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:33,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:31:33,542 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:31:33,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:31:33,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:33,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-02 20:31:33,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:31:34,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:34,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:31:34,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:34,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218387517] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:31:34,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:31:34,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 17 [2022-11-02 20:31:34,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946567085] [2022-11-02 20:31:34,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:31:34,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-02 20:31:34,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:31:34,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-02 20:31:34,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:31:34,743 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 80 [2022-11-02 20:31:34,745 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 68 transitions, 163 flow. Second operand has 17 states, 17 states have (on average 53.76470588235294) internal successors, (914), 17 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:34,745 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:31:34,745 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 80 [2022-11-02 20:31:34,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:31:35,463 INFO L130 PetriNetUnfolder]: 174/571 cut-off events. [2022-11-02 20:31:35,464 INFO L131 PetriNetUnfolder]: For 75/75 co-relation queries the response was YES. [2022-11-02 20:31:35,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1084 conditions, 571 events. 174/571 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3207 event pairs, 0 based on Foata normal form. 3/498 useless extension candidates. Maximal degree in co-relation 1058. Up to 82 conditions per place. [2022-11-02 20:31:35,471 INFO L137 encePairwiseOnDemand]: 67/80 looper letters, 93 selfloop transitions, 31 changer transitions 19/184 dead transitions. [2022-11-02 20:31:35,471 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 184 transitions, 763 flow [2022-11-02 20:31:35,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:31:35,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:31:35,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1217 transitions. [2022-11-02 20:31:35,476 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7244047619047619 [2022-11-02 20:31:35,476 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1217 transitions. [2022-11-02 20:31:35,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1217 transitions. [2022-11-02 20:31:35,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:31:35,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1217 transitions. [2022-11-02 20:31:35,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 57.95238095238095) internal successors, (1217), 21 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:35,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 80.0) internal successors, (1760), 22 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:35,489 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 80.0) internal successors, (1760), 22 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:35,489 INFO L175 Difference]: Start difference. First operand has 77 places, 68 transitions, 163 flow. Second operand 21 states and 1217 transitions. [2022-11-02 20:31:35,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 184 transitions, 763 flow [2022-11-02 20:31:35,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 184 transitions, 741 flow, removed 11 selfloop flow, removed 2 redundant places. [2022-11-02 20:31:35,496 INFO L231 Difference]: Finished difference. Result has 106 places, 92 transitions, 391 flow [2022-11-02 20:31:35,497 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=391, PETRI_PLACES=106, PETRI_TRANSITIONS=92} [2022-11-02 20:31:35,498 INFO L287 CegarLoopForPetriNet]: 71 programPoint places, 35 predicate places. [2022-11-02 20:31:35,516 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 92 transitions, 391 flow [2022-11-02 20:31:35,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 53.76470588235294) internal successors, (914), 17 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:35,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:31:35,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:31:35,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:31:35,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:35,733 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:31:35,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:31:35,734 INFO L85 PathProgramCache]: Analyzing trace with hash 969069285, now seen corresponding path program 1 times [2022-11-02 20:31:35,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:31:35,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572589591] [2022-11-02 20:31:35,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:35,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:31:35,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:36,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:36,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:31:36,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572589591] [2022-11-02 20:31:36,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572589591] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:31:36,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170944207] [2022-11-02 20:31:36,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:36,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:36,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:31:36,235 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:31:36,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:31:36,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:36,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:31:36,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:31:36,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:36,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:31:38,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:31:38,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170944207] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 20:31:38,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:31:38,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 9] total 13 [2022-11-02 20:31:38,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24701605] [2022-11-02 20:31:38,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:31:38,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:31:38,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:31:38,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:31:38,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:31:38,470 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-11-02 20:31:38,471 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 92 transitions, 391 flow. Second operand has 8 states, 8 states have (on average 57.875) internal successors, (463), 8 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:38,471 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:31:38,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-11-02 20:31:38,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:31:39,080 INFO L130 PetriNetUnfolder]: 74/397 cut-off events. [2022-11-02 20:31:39,080 INFO L131 PetriNetUnfolder]: For 408/435 co-relation queries the response was YES. [2022-11-02 20:31:39,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 950 conditions, 397 events. 74/397 cut-off events. For 408/435 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2133 event pairs, 7 based on Foata normal form. 16/389 useless extension candidates. Maximal degree in co-relation 902. Up to 142 conditions per place. [2022-11-02 20:31:39,094 INFO L137 encePairwiseOnDemand]: 69/80 looper letters, 39 selfloop transitions, 10 changer transitions 9/112 dead transitions. [2022-11-02 20:31:39,094 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 112 transitions, 599 flow [2022-11-02 20:31:39,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:31:39,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:31:39,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 549 transitions. [2022-11-02 20:31:39,098 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7625 [2022-11-02 20:31:39,099 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 549 transitions. [2022-11-02 20:31:39,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 549 transitions. [2022-11-02 20:31:39,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:31:39,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 549 transitions. [2022-11-02 20:31:39,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 61.0) internal successors, (549), 9 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:39,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:39,104 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:39,104 INFO L175 Difference]: Start difference. First operand has 106 places, 92 transitions, 391 flow. Second operand 9 states and 549 transitions. [2022-11-02 20:31:39,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 112 transitions, 599 flow [2022-11-02 20:31:39,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 112 transitions, 523 flow, removed 29 selfloop flow, removed 10 redundant places. [2022-11-02 20:31:39,121 INFO L231 Difference]: Finished difference. Result has 102 places, 92 transitions, 368 flow [2022-11-02 20:31:39,121 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=368, PETRI_PLACES=102, PETRI_TRANSITIONS=92} [2022-11-02 20:31:39,124 INFO L287 CegarLoopForPetriNet]: 71 programPoint places, 31 predicate places. [2022-11-02 20:31:39,124 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 92 transitions, 368 flow [2022-11-02 20:31:39,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 57.875) internal successors, (463), 8 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:39,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:31:39,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:31:39,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:31:39,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-02 20:31:39,351 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:31:39,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:31:39,352 INFO L85 PathProgramCache]: Analyzing trace with hash -946960933, now seen corresponding path program 2 times [2022-11-02 20:31:39,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:31:39,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509920901] [2022-11-02 20:31:39,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:39,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:31:39,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:39,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:39,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:31:39,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509920901] [2022-11-02 20:31:39,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509920901] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:31:39,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885882434] [2022-11-02 20:31:39,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:31:39,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:39,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:31:39,823 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:31:39,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:31:39,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:31:39,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:31:39,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-02 20:31:39,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:31:40,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:40,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:31:40,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:40,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885882434] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:31:40,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:31:40,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 16 [2022-11-02 20:31:40,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050358564] [2022-11-02 20:31:40,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:31:40,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-02 20:31:40,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:31:40,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-02 20:31:40,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:31:40,783 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 80 [2022-11-02 20:31:40,784 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 92 transitions, 368 flow. Second operand has 16 states, 16 states have (on average 53.875) internal successors, (862), 16 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:40,785 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:31:40,785 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 80 [2022-11-02 20:31:40,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:31:41,637 INFO L130 PetriNetUnfolder]: 189/685 cut-off events. [2022-11-02 20:31:41,638 INFO L131 PetriNetUnfolder]: For 648/648 co-relation queries the response was YES. [2022-11-02 20:31:41,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1705 conditions, 685 events. 189/685 cut-off events. For 648/648 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4140 event pairs, 52 based on Foata normal form. 3/682 useless extension candidates. Maximal degree in co-relation 1662. Up to 227 conditions per place. [2022-11-02 20:31:41,645 INFO L137 encePairwiseOnDemand]: 69/80 looper letters, 86 selfloop transitions, 32 changer transitions 18/177 dead transitions. [2022-11-02 20:31:41,645 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 177 transitions, 1008 flow [2022-11-02 20:31:41,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-02 20:31:41,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-02 20:31:41,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1089 transitions. [2022-11-02 20:31:41,649 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7164473684210526 [2022-11-02 20:31:41,649 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1089 transitions. [2022-11-02 20:31:41,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1089 transitions. [2022-11-02 20:31:41,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:31:41,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1089 transitions. [2022-11-02 20:31:41,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 57.31578947368421) internal successors, (1089), 19 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:41,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 80.0) internal successors, (1600), 20 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:41,659 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 80.0) internal successors, (1600), 20 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:41,660 INFO L175 Difference]: Start difference. First operand has 102 places, 92 transitions, 368 flow. Second operand 19 states and 1089 transitions. [2022-11-02 20:31:41,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 177 transitions, 1008 flow [2022-11-02 20:31:41,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 177 transitions, 940 flow, removed 25 selfloop flow, removed 7 redundant places. [2022-11-02 20:31:41,671 INFO L231 Difference]: Finished difference. Result has 122 places, 108 transitions, 586 flow [2022-11-02 20:31:41,671 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=586, PETRI_PLACES=122, PETRI_TRANSITIONS=108} [2022-11-02 20:31:41,673 INFO L287 CegarLoopForPetriNet]: 71 programPoint places, 51 predicate places. [2022-11-02 20:31:41,673 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 108 transitions, 586 flow [2022-11-02 20:31:41,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 53.875) internal successors, (862), 16 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:41,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:31:41,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:31:41,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:31:41,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:41,893 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:31:41,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:31:41,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1152496093, now seen corresponding path program 3 times [2022-11-02 20:31:41,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:31:41,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601273445] [2022-11-02 20:31:41,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:41,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:31:41,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:42,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:42,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:31:42,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601273445] [2022-11-02 20:31:42,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601273445] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:31:42,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558948955] [2022-11-02 20:31:42,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:31:42,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:42,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:31:42,265 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:31:42,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:31:42,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 20:31:42,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:31:42,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-02 20:31:42,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:31:42,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:42,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:31:43,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:43,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558948955] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 20:31:43,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:31:43,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 10] total 15 [2022-11-02 20:31:43,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823405215] [2022-11-02 20:31:43,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:31:43,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:31:43,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:31:43,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:31:43,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:31:43,105 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 80 [2022-11-02 20:31:43,105 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 108 transitions, 586 flow. Second operand has 9 states, 9 states have (on average 53.22222222222222) internal successors, (479), 9 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:43,106 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:31:43,106 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 80 [2022-11-02 20:31:43,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:31:43,717 INFO L130 PetriNetUnfolder]: 189/702 cut-off events. [2022-11-02 20:31:43,717 INFO L131 PetriNetUnfolder]: For 1364/1364 co-relation queries the response was YES. [2022-11-02 20:31:43,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2010 conditions, 702 events. 189/702 cut-off events. For 1364/1364 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4314 event pairs, 84 based on Foata normal form. 3/695 useless extension candidates. Maximal degree in co-relation 1956. Up to 345 conditions per place. [2022-11-02 20:31:43,725 INFO L137 encePairwiseOnDemand]: 69/80 looper letters, 69 selfloop transitions, 12 changer transitions 15/137 dead transitions. [2022-11-02 20:31:43,726 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 137 transitions, 936 flow [2022-11-02 20:31:43,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:31:43,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:31:43,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 520 transitions. [2022-11-02 20:31:43,729 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7222222222222222 [2022-11-02 20:31:43,729 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 520 transitions. [2022-11-02 20:31:43,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 520 transitions. [2022-11-02 20:31:43,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:31:43,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 520 transitions. [2022-11-02 20:31:43,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 57.77777777777778) internal successors, (520), 9 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:43,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:43,734 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:43,734 INFO L175 Difference]: Start difference. First operand has 122 places, 108 transitions, 586 flow. Second operand 9 states and 520 transitions. [2022-11-02 20:31:43,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 137 transitions, 936 flow [2022-11-02 20:31:43,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 137 transitions, 857 flow, removed 28 selfloop flow, removed 10 redundant places. [2022-11-02 20:31:43,749 INFO L231 Difference]: Finished difference. Result has 118 places, 108 transitions, 565 flow [2022-11-02 20:31:43,750 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=565, PETRI_PLACES=118, PETRI_TRANSITIONS=108} [2022-11-02 20:31:43,750 INFO L287 CegarLoopForPetriNet]: 71 programPoint places, 47 predicate places. [2022-11-02 20:31:43,751 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 108 transitions, 565 flow [2022-11-02 20:31:43,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 53.22222222222222) internal successors, (479), 9 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:43,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:31:43,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:31:43,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:31:43,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:43,970 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:31:43,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:31:43,971 INFO L85 PathProgramCache]: Analyzing trace with hash -662099525, now seen corresponding path program 2 times [2022-11-02 20:31:43,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:31:43,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952536286] [2022-11-02 20:31:43,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:43,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:31:44,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:44,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:44,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:31:44,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952536286] [2022-11-02 20:31:44,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952536286] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:31:44,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382816702] [2022-11-02 20:31:44,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:31:44,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:44,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:31:44,450 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:31:44,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:31:44,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:31:44,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:31:44,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 20:31:44,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:31:44,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:44,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:31:45,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:45,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382816702] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:31:45,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:31:45,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 14 [2022-11-02 20:31:45,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533696651] [2022-11-02 20:31:45,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:31:45,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:31:45,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:31:45,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:31:45,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:31:45,362 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-11-02 20:31:45,363 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 108 transitions, 565 flow. Second operand has 14 states, 14 states have (on average 58.07142857142857) internal successors, (813), 14 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:45,363 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:31:45,363 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-11-02 20:31:45,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:31:46,068 INFO L130 PetriNetUnfolder]: 94/503 cut-off events. [2022-11-02 20:31:46,069 INFO L131 PetriNetUnfolder]: For 970/999 co-relation queries the response was YES. [2022-11-02 20:31:46,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1323 conditions, 503 events. 94/503 cut-off events. For 970/999 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2866 event pairs, 4 based on Foata normal form. 18/510 useless extension candidates. Maximal degree in co-relation 1274. Up to 167 conditions per place. [2022-11-02 20:31:46,075 INFO L137 encePairwiseOnDemand]: 70/80 looper letters, 46 selfloop transitions, 46 changer transitions 12/163 dead transitions. [2022-11-02 20:31:46,075 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 163 transitions, 1092 flow [2022-11-02 20:31:46,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-02 20:31:46,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-02 20:31:46,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1026 transitions. [2022-11-02 20:31:46,079 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7544117647058823 [2022-11-02 20:31:46,080 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1026 transitions. [2022-11-02 20:31:46,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1026 transitions. [2022-11-02 20:31:46,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:31:46,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1026 transitions. [2022-11-02 20:31:46,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 60.35294117647059) internal successors, (1026), 17 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:46,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 80.0) internal successors, (1440), 18 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:46,088 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 80.0) internal successors, (1440), 18 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:46,088 INFO L175 Difference]: Start difference. First operand has 118 places, 108 transitions, 565 flow. Second operand 17 states and 1026 transitions. [2022-11-02 20:31:46,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 163 transitions, 1092 flow [2022-11-02 20:31:46,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 163 transitions, 1036 flow, removed 15 selfloop flow, removed 7 redundant places. [2022-11-02 20:31:46,101 INFO L231 Difference]: Finished difference. Result has 138 places, 130 transitions, 908 flow [2022-11-02 20:31:46,101 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=541, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=908, PETRI_PLACES=138, PETRI_TRANSITIONS=130} [2022-11-02 20:31:46,102 INFO L287 CegarLoopForPetriNet]: 71 programPoint places, 67 predicate places. [2022-11-02 20:31:46,102 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 130 transitions, 908 flow [2022-11-02 20:31:46,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 58.07142857142857) internal successors, (813), 14 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:46,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:31:46,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:31:46,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:31:46,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-02 20:31:46,319 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:31:46,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:31:46,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1243003043, now seen corresponding path program 3 times [2022-11-02 20:31:46,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:31:46,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884263095] [2022-11-02 20:31:46,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:46,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:31:46,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:46,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:46,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:31:46,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884263095] [2022-11-02 20:31:46,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884263095] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:31:46,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946584024] [2022-11-02 20:31:46,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:31:46,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:46,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:31:46,891 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:31:46,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:31:46,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 20:31:46,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:31:46,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 20:31:46,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:31:47,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:47,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:31:47,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:47,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946584024] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:31:47,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:31:47,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2022-11-02 20:31:47,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932190909] [2022-11-02 20:31:47,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:31:47,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-02 20:31:47,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:31:47,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-02 20:31:47,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:31:47,635 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-11-02 20:31:47,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 130 transitions, 908 flow. Second operand has 15 states, 15 states have (on average 58.0) internal successors, (870), 15 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:47,636 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:31:47,637 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-11-02 20:31:47,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:31:48,211 INFO L130 PetriNetUnfolder]: 109/597 cut-off events. [2022-11-02 20:31:48,211 INFO L131 PetriNetUnfolder]: For 1770/1821 co-relation queries the response was YES. [2022-11-02 20:31:48,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1831 conditions, 597 events. 109/597 cut-off events. For 1770/1821 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3717 event pairs, 7 based on Foata normal form. 25/612 useless extension candidates. Maximal degree in co-relation 1762. Up to 167 conditions per place. [2022-11-02 20:31:48,219 INFO L137 encePairwiseOnDemand]: 68/80 looper letters, 42 selfloop transitions, 65 changer transitions 9/175 dead transitions. [2022-11-02 20:31:48,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 175 transitions, 1486 flow [2022-11-02 20:31:48,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 20:31:48,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-02 20:31:48,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1077 transitions. [2022-11-02 20:31:48,224 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7479166666666667 [2022-11-02 20:31:48,224 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1077 transitions. [2022-11-02 20:31:48,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1077 transitions. [2022-11-02 20:31:48,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:31:48,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1077 transitions. [2022-11-02 20:31:48,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 59.833333333333336) internal successors, (1077), 18 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:48,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 80.0) internal successors, (1520), 19 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:48,235 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 80.0) internal successors, (1520), 19 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:48,235 INFO L175 Difference]: Start difference. First operand has 138 places, 130 transitions, 908 flow. Second operand 18 states and 1077 transitions. [2022-11-02 20:31:48,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 175 transitions, 1486 flow [2022-11-02 20:31:48,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 175 transitions, 1437 flow, removed 20 selfloop flow, removed 8 redundant places. [2022-11-02 20:31:48,262 INFO L231 Difference]: Finished difference. Result has 150 places, 152 transitions, 1266 flow [2022-11-02 20:31:48,262 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=883, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1266, PETRI_PLACES=150, PETRI_TRANSITIONS=152} [2022-11-02 20:31:48,264 INFO L287 CegarLoopForPetriNet]: 71 programPoint places, 79 predicate places. [2022-11-02 20:31:48,264 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 152 transitions, 1266 flow [2022-11-02 20:31:48,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 58.0) internal successors, (870), 15 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:48,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:31:48,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:31:48,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:31:48,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-02 20:31:48,479 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:31:48,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:31:48,479 INFO L85 PathProgramCache]: Analyzing trace with hash -252708655, now seen corresponding path program 1 times [2022-11-02 20:31:48,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:31:48,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141482362] [2022-11-02 20:31:48,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:48,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:31:48,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:50,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:50,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:31:50,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141482362] [2022-11-02 20:31:50,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141482362] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:31:50,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247790860] [2022-11-02 20:31:50,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:50,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:50,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:31:50,683 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:31:50,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:31:50,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:50,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-02 20:31:50,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:31:53,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:53,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:32:19,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:32:19,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247790860] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:32:19,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:32:19,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 40 [2022-11-02 20:32:19,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036385377] [2022-11-02 20:32:19,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:32:19,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-02 20:32:19,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:32:19,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-02 20:32:19,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1350, Unknown=6, NotChecked=0, Total=1560 [2022-11-02 20:32:19,379 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 80 [2022-11-02 20:32:19,387 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 152 transitions, 1266 flow. Second operand has 40 states, 40 states have (on average 48.625) internal successors, (1945), 40 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:32:19,388 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:32:19,388 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 80 [2022-11-02 20:32:19,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:32:42,503 INFO L130 PetriNetUnfolder]: 459/1551 cut-off events. [2022-11-02 20:32:42,503 INFO L131 PetriNetUnfolder]: For 5201/5215 co-relation queries the response was YES. [2022-11-02 20:32:42,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5402 conditions, 1551 events. 459/1551 cut-off events. For 5201/5215 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12140 event pairs, 53 based on Foata normal form. 4/1551 useless extension candidates. Maximal degree in co-relation 5316. Up to 373 conditions per place. [2022-11-02 20:32:42,528 INFO L137 encePairwiseOnDemand]: 57/80 looper letters, 128 selfloop transitions, 213 changer transitions 21/399 dead transitions. [2022-11-02 20:32:42,528 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 399 transitions, 3782 flow [2022-11-02 20:32:42,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-02 20:32:42,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-11-02 20:32:42,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 2674 transitions. [2022-11-02 20:32:42,540 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6427884615384616 [2022-11-02 20:32:42,540 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 2674 transitions. [2022-11-02 20:32:42,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 2674 transitions. [2022-11-02 20:32:42,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:32:42,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 2674 transitions. [2022-11-02 20:32:42,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 51.42307692307692) internal successors, (2674), 52 states have internal predecessors, (2674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:32:42,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 80.0) internal successors, (4240), 53 states have internal predecessors, (4240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:32:42,568 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 80.0) internal successors, (4240), 53 states have internal predecessors, (4240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:32:42,568 INFO L175 Difference]: Start difference. First operand has 150 places, 152 transitions, 1266 flow. Second operand 52 states and 2674 transitions. [2022-11-02 20:32:42,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 399 transitions, 3782 flow [2022-11-02 20:32:42,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 399 transitions, 3432 flow, removed 49 selfloop flow, removed 10 redundant places. [2022-11-02 20:32:42,656 INFO L231 Difference]: Finished difference. Result has 204 places, 296 transitions, 2820 flow [2022-11-02 20:32:42,657 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=1118, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=2820, PETRI_PLACES=204, PETRI_TRANSITIONS=296} [2022-11-02 20:32:42,662 INFO L287 CegarLoopForPetriNet]: 71 programPoint places, 133 predicate places. [2022-11-02 20:32:42,662 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 296 transitions, 2820 flow [2022-11-02 20:32:42,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 48.625) internal successors, (1945), 40 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:32:42,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:32:42,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:32:42,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:32:42,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:32:42,875 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:32:42,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:32:42,876 INFO L85 PathProgramCache]: Analyzing trace with hash -214341941, now seen corresponding path program 2 times [2022-11-02 20:32:42,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:32:42,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125391650] [2022-11-02 20:32:42,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:32:42,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:32:42,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:32:44,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:32:44,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:32:44,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125391650] [2022-11-02 20:32:44,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125391650] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:32:44,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422091101] [2022-11-02 20:32:44,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:32:44,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:32:44,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:32:44,587 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:32:44,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:32:44,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:32:44,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:32:44,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-02 20:32:44,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:32:50,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:32:50,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:32:57,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:32:57,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422091101] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:32:57,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:32:57,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 37 [2022-11-02 20:32:57,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242259093] [2022-11-02 20:32:57,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:32:57,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-02 20:32:57,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:32:57,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-02 20:32:57,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1160, Unknown=1, NotChecked=0, Total=1332 [2022-11-02 20:32:57,037 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 80 [2022-11-02 20:32:57,040 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 296 transitions, 2820 flow. Second operand has 37 states, 37 states have (on average 48.729729729729726) internal successors, (1803), 37 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:32:57,040 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:32:57,040 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 80 [2022-11-02 20:32:57,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:33:17,898 INFO L130 PetriNetUnfolder]: 505/1755 cut-off events. [2022-11-02 20:33:17,898 INFO L131 PetriNetUnfolder]: For 7529/7529 co-relation queries the response was YES. [2022-11-02 20:33:17,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7134 conditions, 1755 events. 505/1755 cut-off events. For 7529/7529 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 14452 event pairs, 53 based on Foata normal form. 2/1751 useless extension candidates. Maximal degree in co-relation 7029. Up to 378 conditions per place. [2022-11-02 20:33:17,926 INFO L137 encePairwiseOnDemand]: 58/80 looper letters, 173 selfloop transitions, 280 changer transitions 35/525 dead transitions. [2022-11-02 20:33:17,926 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 525 transitions, 5662 flow [2022-11-02 20:33:17,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-02 20:33:17,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2022-11-02 20:33:17,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 3526 transitions. [2022-11-02 20:33:17,936 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.638768115942029 [2022-11-02 20:33:17,936 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 3526 transitions. [2022-11-02 20:33:17,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 3526 transitions. [2022-11-02 20:33:17,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:33:17,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 3526 transitions. [2022-11-02 20:33:17,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 51.10144927536232) internal successors, (3526), 69 states have internal predecessors, (3526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:33:17,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 80.0) internal successors, (5600), 70 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:33:17,962 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 80.0) internal successors, (5600), 70 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:33:17,962 INFO L175 Difference]: Start difference. First operand has 204 places, 296 transitions, 2820 flow. Second operand 69 states and 3526 transitions. [2022-11-02 20:33:17,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 525 transitions, 5662 flow [2022-11-02 20:33:18,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 525 transitions, 5417 flow, removed 88 selfloop flow, removed 14 redundant places. [2022-11-02 20:33:18,042 INFO L231 Difference]: Finished difference. Result has 282 places, 395 transitions, 4580 flow [2022-11-02 20:33:18,043 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=2674, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=4580, PETRI_PLACES=282, PETRI_TRANSITIONS=395} [2022-11-02 20:33:18,044 INFO L287 CegarLoopForPetriNet]: 71 programPoint places, 211 predicate places. [2022-11-02 20:33:18,044 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 395 transitions, 4580 flow [2022-11-02 20:33:18,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 48.729729729729726) internal successors, (1803), 37 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:33:18,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:33:18,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:33:18,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:33:18,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:33:18,247 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:33:18,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:33:18,248 INFO L85 PathProgramCache]: Analyzing trace with hash -399031847, now seen corresponding path program 3 times [2022-11-02 20:33:18,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:33:18,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459124659] [2022-11-02 20:33:18,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:33:18,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:33:18,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:33:19,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:33:19,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:33:19,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459124659] [2022-11-02 20:33:19,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459124659] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:33:19,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647688695] [2022-11-02 20:33:19,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:33:19,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:33:19,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:33:19,887 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:33:19,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:33:19,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 20:33:19,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:33:19,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-02 20:33:19,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:33:21,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:33:21,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:33:26,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:33:26,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647688695] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:33:26,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:33:26,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 38 [2022-11-02 20:33:26,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098004426] [2022-11-02 20:33:26,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:33:26,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-02 20:33:26,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:33:26,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-02 20:33:26,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1232, Unknown=0, NotChecked=0, Total=1406 [2022-11-02 20:33:26,837 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 80 [2022-11-02 20:33:26,840 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 395 transitions, 4580 flow. Second operand has 38 states, 38 states have (on average 48.68421052631579) internal successors, (1850), 38 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:33:26,840 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:33:26,841 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 80 [2022-11-02 20:33:26,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:33:48,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-02 20:33:57,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-02 20:34:00,130 INFO L130 PetriNetUnfolder]: 629/2055 cut-off events. [2022-11-02 20:34:00,130 INFO L131 PetriNetUnfolder]: For 15102/15102 co-relation queries the response was YES. [2022-11-02 20:34:00,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10256 conditions, 2055 events. 629/2055 cut-off events. For 15102/15102 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 17174 event pairs, 48 based on Foata normal form. 1/2051 useless extension candidates. Maximal degree in co-relation 10111. Up to 482 conditions per place. [2022-11-02 20:34:00,165 INFO L137 encePairwiseOnDemand]: 57/80 looper letters, 170 selfloop transitions, 433 changer transitions 25/665 dead transitions. [2022-11-02 20:34:00,165 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 665 transitions, 8725 flow [2022-11-02 20:34:00,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-11-02 20:34:00,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2022-11-02 20:34:00,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 4941 transitions. [2022-11-02 20:34:00,191 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6367268041237113 [2022-11-02 20:34:00,192 INFO L72 ComplementDD]: Start complementDD. Operand 97 states and 4941 transitions. [2022-11-02 20:34:00,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 4941 transitions. [2022-11-02 20:34:00,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:34:00,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 97 states and 4941 transitions. [2022-11-02 20:34:00,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 98 states, 97 states have (on average 50.93814432989691) internal successors, (4941), 97 states have internal predecessors, (4941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:00,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 98 states, 98 states have (on average 80.0) internal successors, (7840), 98 states have internal predecessors, (7840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:00,255 INFO L81 ComplementDD]: Finished complementDD. Result has 98 states, 98 states have (on average 80.0) internal successors, (7840), 98 states have internal predecessors, (7840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:00,256 INFO L175 Difference]: Start difference. First operand has 282 places, 395 transitions, 4580 flow. Second operand 97 states and 4941 transitions. [2022-11-02 20:34:00,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 665 transitions, 8725 flow [2022-11-02 20:34:00,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 665 transitions, 8062 flow, removed 167 selfloop flow, removed 25 redundant places. [2022-11-02 20:34:00,418 INFO L231 Difference]: Finished difference. Result has 366 places, 535 transitions, 7000 flow [2022-11-02 20:34:00,420 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=4124, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=300, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=7000, PETRI_PLACES=366, PETRI_TRANSITIONS=535} [2022-11-02 20:34:00,420 INFO L287 CegarLoopForPetriNet]: 71 programPoint places, 295 predicate places. [2022-11-02 20:34:00,421 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 535 transitions, 7000 flow [2022-11-02 20:34:00,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 48.68421052631579) internal successors, (1850), 38 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:00,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:34:00,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:34:00,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:34:00,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-02 20:34:00,638 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:34:00,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:34:00,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1375096551, now seen corresponding path program 4 times [2022-11-02 20:34:00,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:34:00,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246859169] [2022-11-02 20:34:00,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:00,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:34:00,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:02,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:34:02,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:34:02,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246859169] [2022-11-02 20:34:02,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246859169] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:34:02,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742345449] [2022-11-02 20:34:02,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:34:02,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:34:02,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:34:02,487 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:34:02,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da382175-bc16-4ebf-9cfc-bba54b2746da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:34:02,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:34:02,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:34:02,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-02 20:34:02,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:34:04,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:34:04,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:34:11,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:34:11,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742345449] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:34:11,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:34:11,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 38 [2022-11-02 20:34:11,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711862268] [2022-11-02 20:34:11,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:34:11,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-02 20:34:11,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:34:11,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-02 20:34:11,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2022-11-02 20:34:11,977 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 80 [2022-11-02 20:34:11,979 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 535 transitions, 7000 flow. Second operand has 38 states, 38 states have (on average 48.68421052631579) internal successors, (1850), 38 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:11,979 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:34:11,979 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 80 [2022-11-02 20:34:11,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:35:15,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []