./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/bench-exp2x9.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac11184b-081b-4611-8b9b-1f2be0fe0e0f/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac11184b-081b-4611-8b9b-1f2be0fe0e0f/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac11184b-081b-4611-8b9b-1f2be0fe0e0f/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac11184b-081b-4611-8b9b-1f2be0fe0e0f/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/bench-exp2x9.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac11184b-081b-4611-8b9b-1f2be0fe0e0f/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac11184b-081b-4611-8b9b-1f2be0fe0e0f/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d6a1dd92aa2998cfb1326128fd549d301e029b328accb048c4d2ec692e416e63 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 10:53:51,219 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 10:53:51,225 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 10:53:51,247 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 10:53:51,250 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 10:53:51,254 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 10:53:51,256 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 10:53:51,261 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 10:53:51,264 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 10:53:51,269 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 10:53:51,271 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 10:53:51,273 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 10:53:51,273 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 10:53:51,276 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 10:53:51,278 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 10:53:51,280 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 10:53:51,282 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 10:53:51,283 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 10:53:51,284 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 10:53:51,291 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 10:53:51,292 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 10:53:51,293 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 10:53:51,296 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 10:53:51,297 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 10:53:51,304 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 10:53:51,305 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 10:53:51,305 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 10:53:51,307 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 10:53:51,307 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 10:53:51,308 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 10:53:51,309 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 10:53:51,310 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 10:53:51,312 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 10:53:51,313 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 10:53:51,314 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 10:53:51,315 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 10:53:51,316 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 10:53:51,316 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 10:53:51,317 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 10:53:51,318 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 10:53:51,318 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 10:53:51,319 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac11184b-081b-4611-8b9b-1f2be0fe0e0f/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 10:53:51,353 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 10:53:51,358 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 10:53:51,358 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 10:53:51,359 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 10:53:51,360 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 10:53:51,360 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 10:53:51,361 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 10:53:51,361 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 10:53:51,361 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 10:53:51,362 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 10:53:51,363 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 10:53:51,363 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 10:53:51,363 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 10:53:51,364 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 10:53:51,364 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 10:53:51,364 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 10:53:51,364 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 10:53:51,365 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 10:53:51,365 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 10:53:51,365 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 10:53:51,365 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 10:53:51,366 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 10:53:51,366 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 10:53:51,366 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 10:53:51,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 10:53:51,367 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 10:53:51,367 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 10:53:51,367 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 10:53:51,368 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 10:53:51,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 10:53:51,368 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 10:53:51,369 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 10:53:51,369 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 10:53:51,369 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_ac11184b-081b-4611-8b9b-1f2be0fe0e0f/bin/uautomizer-tPACEb0tL8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac11184b-081b-4611-8b9b-1f2be0fe0e0f/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d6a1dd92aa2998cfb1326128fd549d301e029b328accb048c4d2ec692e416e63 [2022-11-16 10:53:51,661 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 10:53:51,682 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 10:53:51,697 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 10:53:51,699 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 10:53:51,701 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 10:53:51,702 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac11184b-081b-4611-8b9b-1f2be0fe0e0f/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/bench-exp2x9.wvr.c [2022-11-16 10:53:51,772 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac11184b-081b-4611-8b9b-1f2be0fe0e0f/bin/uautomizer-tPACEb0tL8/data/1b6beb224/68e9e696001a4e8bb253722287571253/FLAG1c1879fb0 [2022-11-16 10:53:52,194 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 10:53:52,194 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac11184b-081b-4611-8b9b-1f2be0fe0e0f/sv-benchmarks/c/weaver/bench-exp2x9.wvr.c [2022-11-16 10:53:52,203 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac11184b-081b-4611-8b9b-1f2be0fe0e0f/bin/uautomizer-tPACEb0tL8/data/1b6beb224/68e9e696001a4e8bb253722287571253/FLAG1c1879fb0 [2022-11-16 10:53:52,572 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac11184b-081b-4611-8b9b-1f2be0fe0e0f/bin/uautomizer-tPACEb0tL8/data/1b6beb224/68e9e696001a4e8bb253722287571253 [2022-11-16 10:53:52,575 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 10:53:52,576 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 10:53:52,578 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 10:53:52,578 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 10:53:52,582 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 10:53:52,582 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 10:53:52" (1/1) ... [2022-11-16 10:53:52,583 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20fac8b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:53:52, skipping insertion in model container [2022-11-16 10:53:52,584 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 10:53:52" (1/1) ... [2022-11-16 10:53:52,591 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 10:53:52,609 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 10:53:52,828 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac11184b-081b-4611-8b9b-1f2be0fe0e0f/sv-benchmarks/c/weaver/bench-exp2x9.wvr.c[2669,2682] [2022-11-16 10:53:52,836 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 10:53:52,843 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 10:53:52,875 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac11184b-081b-4611-8b9b-1f2be0fe0e0f/sv-benchmarks/c/weaver/bench-exp2x9.wvr.c[2669,2682] [2022-11-16 10:53:52,876 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 10:53:52,889 INFO L208 MainTranslator]: Completed translation [2022-11-16 10:53:52,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:53:52 WrapperNode [2022-11-16 10:53:52,890 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 10:53:52,892 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 10:53:52,892 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 10:53:52,892 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 10:53:52,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:53:52" (1/1) ... [2022-11-16 10:53:52,921 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:53:52" (1/1) ... [2022-11-16 10:53:52,941 INFO L138 Inliner]: procedures = 20, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 91 [2022-11-16 10:53:52,941 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 10:53:52,942 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 10:53:52,942 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 10:53:52,942 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 10:53:52,950 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:53:52" (1/1) ... [2022-11-16 10:53:52,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:53:52" (1/1) ... [2022-11-16 10:53:52,952 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:53:52" (1/1) ... [2022-11-16 10:53:52,958 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:53:52" (1/1) ... [2022-11-16 10:53:52,963 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:53:52" (1/1) ... [2022-11-16 10:53:52,969 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:53:52" (1/1) ... [2022-11-16 10:53:52,971 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:53:52" (1/1) ... [2022-11-16 10:53:52,976 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:53:52" (1/1) ... [2022-11-16 10:53:52,979 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 10:53:52,980 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 10:53:52,980 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 10:53:52,980 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 10:53:52,983 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:53:52" (1/1) ... [2022-11-16 10:53:52,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 10:53:53,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac11184b-081b-4611-8b9b-1f2be0fe0e0f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:53:53,016 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac11184b-081b-4611-8b9b-1f2be0fe0e0f/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 10:53:53,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac11184b-081b-4611-8b9b-1f2be0fe0e0f/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 10:53:53,050 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 10:53:53,050 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 10:53:53,050 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 10:53:53,050 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 10:53:53,050 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 10:53:53,050 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-16 10:53:53,051 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-16 10:53:53,051 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-16 10:53:53,051 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-16 10:53:53,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 10:53:53,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 10:53:53,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 10:53:53,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 10:53:53,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 10:53:53,052 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 10:53:53,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 10:53:53,053 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 10:53:53,144 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 10:53:53,146 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 10:53:53,459 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 10:53:53,468 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 10:53:53,468 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-16 10:53:53,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 10:53:53 BoogieIcfgContainer [2022-11-16 10:53:53,471 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 10:53:53,473 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 10:53:53,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 10:53:53,494 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 10:53:53,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 10:53:52" (1/3) ... [2022-11-16 10:53:53,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f0cd617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 10:53:53, skipping insertion in model container [2022-11-16 10:53:53,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:53:52" (2/3) ... [2022-11-16 10:53:53,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f0cd617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 10:53:53, skipping insertion in model container [2022-11-16 10:53:53,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 10:53:53" (3/3) ... [2022-11-16 10:53:53,497 INFO L112 eAbstractionObserver]: Analyzing ICFG bench-exp2x9.wvr.c [2022-11-16 10:53:53,506 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 10:53:53,521 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 10:53:53,522 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 10:53:53,522 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 10:53:53,660 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-16 10:53:53,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 152 places, 149 transitions, 330 flow [2022-11-16 10:53:53,793 INFO L130 PetriNetUnfolder]: 10/145 cut-off events. [2022-11-16 10:53:53,793 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-16 10:53:53,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 145 events. 10/145 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 129 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 102. Up to 2 conditions per place. [2022-11-16 10:53:53,808 INFO L82 GeneralOperation]: Start removeDead. Operand has 152 places, 149 transitions, 330 flow [2022-11-16 10:53:53,813 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 135 places, 132 transitions, 288 flow [2022-11-16 10:53:53,824 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 10:53:53,831 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;@50f4b19a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 10:53:53,831 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-16 10:53:53,891 INFO L130 PetriNetUnfolder]: 10/131 cut-off events. [2022-11-16 10:53:53,892 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-16 10:53:53,893 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:53:53,896 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:53:53,897 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-16 10:53:53,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:53:53,903 INFO L85 PathProgramCache]: Analyzing trace with hash -322697145, now seen corresponding path program 1 times [2022-11-16 10:53:53,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:53:53,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322946333] [2022-11-16 10:53:53,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:53:53,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:53:54,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:53:54,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:53:54,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:53:54,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322946333] [2022-11-16 10:53:54,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322946333] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:53:54,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:53:54,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 10:53:54,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450233354] [2022-11-16 10:53:54,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:53:54,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 10:53:54,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:53:54,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 10:53:54,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 10:53:54,404 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 149 [2022-11-16 10:53:54,410 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 132 transitions, 288 flow. Second operand has 2 states, 2 states have (on average 140.0) internal successors, (280), 2 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:53:54,411 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:53:54,412 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 149 [2022-11-16 10:53:54,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:53:54,514 INFO L130 PetriNetUnfolder]: 4/126 cut-off events. [2022-11-16 10:53:54,514 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-16 10:53:54,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 126 events. 4/126 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 122 event pairs, 0 based on Foata normal form. 18/138 useless extension candidates. Maximal degree in co-relation 101. Up to 9 conditions per place. [2022-11-16 10:53:54,520 INFO L137 encePairwiseOnDemand]: 143/149 looper letters, 8 selfloop transitions, 0 changer transitions 2/126 dead transitions. [2022-11-16 10:53:54,520 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 126 transitions, 292 flow [2022-11-16 10:53:54,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 10:53:54,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 10:53:54,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 282 transitions. [2022-11-16 10:53:54,544 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9463087248322147 [2022-11-16 10:53:54,545 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 282 transitions. [2022-11-16 10:53:54,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 282 transitions. [2022-11-16 10:53:54,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:53:54,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 282 transitions. [2022-11-16 10:53:54,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 141.0) internal successors, (282), 2 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:53:54,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:53:54,566 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:53:54,568 INFO L175 Difference]: Start difference. First operand has 135 places, 132 transitions, 288 flow. Second operand 2 states and 282 transitions. [2022-11-16 10:53:54,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 126 transitions, 292 flow [2022-11-16 10:53:54,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 126 transitions, 276 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-11-16 10:53:54,581 INFO L231 Difference]: Finished difference. Result has 128 places, 124 transitions, 256 flow [2022-11-16 10:53:54,583 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=256, PETRI_PLACES=128, PETRI_TRANSITIONS=124} [2022-11-16 10:53:54,588 INFO L288 CegarLoopForPetriNet]: 135 programPoint places, -7 predicate places. [2022-11-16 10:53:54,589 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 124 transitions, 256 flow [2022-11-16 10:53:54,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 140.0) internal successors, (280), 2 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:53:54,590 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:53:54,590 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:53:54,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 10:53:54,591 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-16 10:53:54,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:53:54,593 INFO L85 PathProgramCache]: Analyzing trace with hash 735830245, now seen corresponding path program 1 times [2022-11-16 10:53:54,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:53:54,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129891834] [2022-11-16 10:53:54,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:53:54,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:53:54,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:53:55,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:53:55,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:53:55,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129891834] [2022-11-16 10:53:55,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129891834] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:53:55,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:53:55,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 10:53:55,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015302580] [2022-11-16 10:53:55,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:53:55,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 10:53:55,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:53:55,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 10:53:55,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-16 10:53:55,764 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 149 [2022-11-16 10:53:55,765 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 124 transitions, 256 flow. Second operand has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:53:55,771 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:53:55,771 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 149 [2022-11-16 10:53:55,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:54:00,245 INFO L130 PetriNetUnfolder]: 24847/33450 cut-off events. [2022-11-16 10:54:00,245 INFO L131 PetriNetUnfolder]: For 860/934 co-relation queries the response was YES. [2022-11-16 10:54:00,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67538 conditions, 33450 events. 24847/33450 cut-off events. For 860/934 co-relation queries the response was YES. Maximal size of possible extension queue 1148. Compared 187470 event pairs, 11708 based on Foata normal form. 1/29664 useless extension candidates. Maximal degree in co-relation 67535. Up to 32788 conditions per place. [2022-11-16 10:54:00,484 INFO L137 encePairwiseOnDemand]: 139/149 looper letters, 71 selfloop transitions, 7 changer transitions 4/146 dead transitions. [2022-11-16 10:54:00,484 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 146 transitions, 471 flow [2022-11-16 10:54:00,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 10:54:00,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 10:54:00,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 643 transitions. [2022-11-16 10:54:00,488 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6164908916586769 [2022-11-16 10:54:00,488 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 643 transitions. [2022-11-16 10:54:00,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 643 transitions. [2022-11-16 10:54:00,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:54:00,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 643 transitions. [2022-11-16 10:54:00,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 91.85714285714286) internal successors, (643), 7 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:54:00,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 149.0) internal successors, (1192), 8 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:54:00,494 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 149.0) internal successors, (1192), 8 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:54:00,494 INFO L175 Difference]: Start difference. First operand has 128 places, 124 transitions, 256 flow. Second operand 7 states and 643 transitions. [2022-11-16 10:54:00,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 146 transitions, 471 flow [2022-11-16 10:54:00,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 146 transitions, 471 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 10:54:00,498 INFO L231 Difference]: Finished difference. Result has 135 places, 128 transitions, 297 flow [2022-11-16 10:54:00,499 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=297, PETRI_PLACES=135, PETRI_TRANSITIONS=128} [2022-11-16 10:54:00,500 INFO L288 CegarLoopForPetriNet]: 135 programPoint places, 0 predicate places. [2022-11-16 10:54:00,500 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 128 transitions, 297 flow [2022-11-16 10:54:00,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:54:00,500 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:54:00,501 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:54:00,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 10:54:00,501 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-16 10:54:00,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:54:00,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1042539278, now seen corresponding path program 1 times [2022-11-16 10:54:00,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:54:00,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748829218] [2022-11-16 10:54:00,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:54:00,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:54:00,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:54:00,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:54:00,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:54:00,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748829218] [2022-11-16 10:54:00,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748829218] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:54:00,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:54:00,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 10:54:00,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675293753] [2022-11-16 10:54:00,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:54:00,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 10:54:00,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:54:00,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 10:54:00,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 10:54:00,970 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 149 [2022-11-16 10:54:00,971 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 128 transitions, 297 flow. Second operand has 6 states, 6 states have (on average 101.66666666666667) internal successors, (610), 6 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:54:00,971 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:54:00,971 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 149 [2022-11-16 10:54:00,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:54:02,188 INFO L130 PetriNetUnfolder]: 5400/8478 cut-off events. [2022-11-16 10:54:02,188 INFO L131 PetriNetUnfolder]: For 879/948 co-relation queries the response was YES. [2022-11-16 10:54:02,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16984 conditions, 8478 events. 5400/8478 cut-off events. For 879/948 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 53561 event pairs, 892 based on Foata normal form. 4/6419 useless extension candidates. Maximal degree in co-relation 16977. Up to 5921 conditions per place. [2022-11-16 10:54:02,265 INFO L137 encePairwiseOnDemand]: 136/149 looper letters, 76 selfloop transitions, 19 changer transitions 0/177 dead transitions. [2022-11-16 10:54:02,266 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 177 transitions, 618 flow [2022-11-16 10:54:02,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 10:54:02,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 10:54:02,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 764 transitions. [2022-11-16 10:54:02,270 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7325023969319271 [2022-11-16 10:54:02,271 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 764 transitions. [2022-11-16 10:54:02,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 764 transitions. [2022-11-16 10:54:02,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:54:02,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 764 transitions. [2022-11-16 10:54:02,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 109.14285714285714) internal successors, (764), 7 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:54:02,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 149.0) internal successors, (1192), 8 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:54:02,278 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 149.0) internal successors, (1192), 8 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:54:02,278 INFO L175 Difference]: Start difference. First operand has 135 places, 128 transitions, 297 flow. Second operand 7 states and 764 transitions. [2022-11-16 10:54:02,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 177 transitions, 618 flow [2022-11-16 10:54:02,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 177 transitions, 599 flow, removed 4 selfloop flow, removed 5 redundant places. [2022-11-16 10:54:02,287 INFO L231 Difference]: Finished difference. Result has 137 places, 138 transitions, 390 flow [2022-11-16 10:54:02,287 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=390, PETRI_PLACES=137, PETRI_TRANSITIONS=138} [2022-11-16 10:54:02,290 INFO L288 CegarLoopForPetriNet]: 135 programPoint places, 2 predicate places. [2022-11-16 10:54:02,290 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 138 transitions, 390 flow [2022-11-16 10:54:02,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 101.66666666666667) internal successors, (610), 6 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:54:02,291 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:54:02,291 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:54:02,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 10:54:02,292 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-16 10:54:02,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:54:02,293 INFO L85 PathProgramCache]: Analyzing trace with hash 637841870, now seen corresponding path program 1 times [2022-11-16 10:54:02,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:54:02,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379870766] [2022-11-16 10:54:02,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:54:02,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:54:02,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:54:02,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:54:02,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:54:02,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379870766] [2022-11-16 10:54:02,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379870766] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 10:54:02,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840353521] [2022-11-16 10:54:02,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:54:02,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:54:02,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac11184b-081b-4611-8b9b-1f2be0fe0e0f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:54:02,876 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac11184b-081b-4611-8b9b-1f2be0fe0e0f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:54:02,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac11184b-081b-4611-8b9b-1f2be0fe0e0f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 10:54:03,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:54:03,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 10:54:03,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:54:03,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:54:03,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:54:03,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:54:03,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840353521] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:54:03,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 10:54:03,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-11-16 10:54:03,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324313031] [2022-11-16 10:54:03,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 10:54:03,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 10:54:03,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:54:03,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 10:54:03,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-11-16 10:54:03,770 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 149 [2022-11-16 10:54:03,771 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 138 transitions, 390 flow. Second operand has 14 states, 14 states have (on average 82.78571428571429) internal successors, (1159), 14 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:54:03,771 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:54:03,772 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 149 [2022-11-16 10:54:03,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:54:10,294 INFO L130 PetriNetUnfolder]: 39810/59465 cut-off events. [2022-11-16 10:54:10,295 INFO L131 PetriNetUnfolder]: For 24175/24197 co-relation queries the response was YES. [2022-11-16 10:54:10,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136106 conditions, 59465 events. 39810/59465 cut-off events. For 24175/24197 co-relation queries the response was YES. Maximal size of possible extension queue 2161. Compared 436919 event pairs, 16643 based on Foata normal form. 0/56183 useless extension candidates. Maximal degree in co-relation 136098. Up to 34314 conditions per place. [2022-11-16 10:54:10,685 INFO L137 encePairwiseOnDemand]: 134/149 looper letters, 283 selfloop transitions, 30 changer transitions 1/376 dead transitions. [2022-11-16 10:54:10,685 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 376 transitions, 1872 flow [2022-11-16 10:54:10,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 10:54:10,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-16 10:54:10,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1360 transitions. [2022-11-16 10:54:10,690 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6519654841802492 [2022-11-16 10:54:10,691 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1360 transitions. [2022-11-16 10:54:10,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1360 transitions. [2022-11-16 10:54:10,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:54:10,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1360 transitions. [2022-11-16 10:54:10,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 97.14285714285714) internal successors, (1360), 14 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:54:10,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 149.0) internal successors, (2235), 15 states have internal predecessors, (2235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:54:10,700 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 149.0) internal successors, (2235), 15 states have internal predecessors, (2235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:54:10,701 INFO L175 Difference]: Start difference. First operand has 137 places, 138 transitions, 390 flow. Second operand 14 states and 1360 transitions. [2022-11-16 10:54:10,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 376 transitions, 1872 flow [2022-11-16 10:54:10,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 376 transitions, 1868 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-16 10:54:10,732 INFO L231 Difference]: Finished difference. Result has 157 places, 156 transitions, 597 flow [2022-11-16 10:54:10,732 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=597, PETRI_PLACES=157, PETRI_TRANSITIONS=156} [2022-11-16 10:54:10,733 INFO L288 CegarLoopForPetriNet]: 135 programPoint places, 22 predicate places. [2022-11-16 10:54:10,733 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 156 transitions, 597 flow [2022-11-16 10:54:10,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 82.78571428571429) internal successors, (1159), 14 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:54:10,735 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:54:10,735 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:54:10,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac11184b-081b-4611-8b9b-1f2be0fe0e0f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 10:54:10,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac11184b-081b-4611-8b9b-1f2be0fe0e0f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:54:10,946 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-16 10:54:10,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:54:10,947 INFO L85 PathProgramCache]: Analyzing trace with hash -2018034240, now seen corresponding path program 2 times [2022-11-16 10:54:10,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:54:10,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885507778] [2022-11-16 10:54:10,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:54:10,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:54:10,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:54:11,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:54:11,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:54:11,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885507778] [2022-11-16 10:54:11,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885507778] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:54:11,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:54:11,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 10:54:11,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299036297] [2022-11-16 10:54:11,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:54:11,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 10:54:11,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:54:11,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 10:54:11,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 10:54:11,355 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 149 [2022-11-16 10:54:11,356 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 156 transitions, 597 flow. Second operand has 6 states, 6 states have (on average 101.66666666666667) internal successors, (610), 6 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:54:11,356 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:54:11,356 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 149 [2022-11-16 10:54:11,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:54:12,631 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([333] L38-1-->L38-2: Formula: (not (< (mod v_~x1~0_1 4294967296) (mod v_~n~0_1 4294967296))) InVars {~n~0=v_~n~0_1, ~x1~0=v_~x1~0_1} OutVars{~n~0=v_~n~0_1, ~x1~0=v_~x1~0_1} AuxVars[] AssignedVars[][87], [30#L109-4true, 42#L38-2true, 18#L67true, 189#true, 91#L54true, Black: 162#(and (= (+ ~x4~0 (* (div ~x3~0 4294967296) 4294967296)) (+ ~x3~0 (* (div ~x4~0 4294967296) 4294967296))) (= (+ (* (div ~x1~0 4294967296) 4294967296) ~x2~0) (+ ~x1~0 (* (div ~x2~0 4294967296) 4294967296)))), 155#true, Black: 808#(and (= (mod ~x2~0 4294967296) (mod ~x1~0 4294967296)) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (< 0 (mod ~x1~0 4294967296))), Black: 195#(<= (+ ~x2~0 (* (div ~n~0 4294967296) 4294967296) 1) (+ ~n~0 (* (div ~x2~0 4294967296) 4294967296))), Black: 806#(and (< (mod ~x2~0 4294967296) (mod ~n~0 4294967296)) (< 0 (mod ~x2~0 4294967296)) (< ~x2~0 (+ (mod ~x1~0 4294967296) (* (div ~x2~0 4294967296) 4294967296) 1))), Black: 810#(and (= (mod ~x2~0 4294967296) (mod ~x1~0 4294967296)) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (< (mod ~x2~0 4294967296) (mod ~n~0 4294967296)) (< 0 (mod ~x1~0 4294967296))), Black: 804#(and (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (not (<= ~x1~0 (* (div ~x1~0 4294967296) 4294967296))) (= (+ ~x4~0 (* (div ~x3~0 4294967296) 4294967296)) (+ ~x3~0 (* (div ~x4~0 4294967296) 4294967296))) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (not (<= ~x3~0 (* (div ~x3~0 4294967296) 4294967296))) (= (+ (* (div ~x1~0 4294967296) 4294967296) ~x2~0) (+ ~x1~0 (* (div ~x2~0 4294967296) 4294967296))) (<= (+ ~x2~0 (* (div ~n~0 4294967296) 4294967296) 1) (+ ~n~0 (* (div ~x2~0 4294967296) 4294967296)))), Black: 802#(and (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (= (+ ~x4~0 (* (div ~x3~0 4294967296) 4294967296)) (+ ~x3~0 (* (div ~x4~0 4294967296) 4294967296))) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (< (* (div ~x3~0 4294967296) 4294967296) ~x3~0) (= (+ (* (div ~x1~0 4294967296) 4294967296) ~x2~0) (+ ~x1~0 (* (div ~x2~0 4294967296) 4294967296))) (< (* (div ~x1~0 4294967296) 4294967296) ~x1~0)), Black: 814#(and (= (mod ~x2~0 4294967296) (mod ~x1~0 4294967296)) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (< 0 (mod ~x1~0 4294967296))), Black: 388#(and (< (mod ~x2~0 4294967296) (mod ~n~0 4294967296)) (< 0 (mod ~x2~0 4294967296))), Black: 179#(<= (+ ~x3~0 (* (div ~x4~0 4294967296) 4294967296)) (+ ~x4~0 (* (div ~x3~0 4294967296) 4294967296))), 834#(and (<= (+ ~x3~0 (* (div ~n~0 4294967296) 4294967296) 1) (+ ~n~0 (* (div ~x3~0 4294967296) 4294967296))) (<= (+ ~x3~0 (* (div ~x4~0 4294967296) 4294967296)) (+ ~x4~0 (* (div ~x3~0 4294967296) 4294967296)))), Black: 180#(<= (+ ~n~0 (* (div ~x4~0 4294967296) 4294967296)) (+ ~x4~0 (* (div ~n~0 4294967296) 4294967296))), 184#(and (<= (+ ~n~0 (* (div ~x4~0 4294967296) 4294967296)) (+ ~x4~0 (* (div ~n~0 4294967296) 4294967296))) (<= (+ ~x3~0 (* (div ~x4~0 4294967296) 4294967296)) (+ ~x4~0 (* (div ~x3~0 4294967296) 4294967296)))), 121#L80-2true]) [2022-11-16 10:54:12,631 INFO L383 tUnfolder$Statistics]: this new event has 80 ancestors and is cut-off event [2022-11-16 10:54:12,631 INFO L386 tUnfolder$Statistics]: existing Event has 72 ancestors and is cut-off event [2022-11-16 10:54:12,632 INFO L386 tUnfolder$Statistics]: existing Event has 72 ancestors and is cut-off event [2022-11-16 10:54:12,632 INFO L386 tUnfolder$Statistics]: existing Event has 64 ancestors and is cut-off event [2022-11-16 10:54:14,163 INFO L130 PetriNetUnfolder]: 11236/17917 cut-off events. [2022-11-16 10:54:14,163 INFO L131 PetriNetUnfolder]: For 37018/38155 co-relation queries the response was YES. [2022-11-16 10:54:14,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54775 conditions, 17917 events. 11236/17917 cut-off events. For 37018/38155 co-relation queries the response was YES. Maximal size of possible extension queue 1445. Compared 141626 event pairs, 2629 based on Foata normal form. 460/17694 useless extension candidates. Maximal degree in co-relation 54758. Up to 11609 conditions per place. [2022-11-16 10:54:14,343 INFO L137 encePairwiseOnDemand]: 138/149 looper letters, 105 selfloop transitions, 22 changer transitions 0/214 dead transitions. [2022-11-16 10:54:14,343 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 214 transitions, 1137 flow [2022-11-16 10:54:14,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 10:54:14,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 10:54:14,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 764 transitions. [2022-11-16 10:54:14,346 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7325023969319271 [2022-11-16 10:54:14,346 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 764 transitions. [2022-11-16 10:54:14,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 764 transitions. [2022-11-16 10:54:14,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:54:14,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 764 transitions. [2022-11-16 10:54:14,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 109.14285714285714) internal successors, (764), 7 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:54:14,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 149.0) internal successors, (1192), 8 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:54:14,352 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 149.0) internal successors, (1192), 8 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:54:14,352 INFO L175 Difference]: Start difference. First operand has 157 places, 156 transitions, 597 flow. Second operand 7 states and 764 transitions. [2022-11-16 10:54:14,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 214 transitions, 1137 flow [2022-11-16 10:54:14,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 214 transitions, 1122 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 10:54:14,400 INFO L231 Difference]: Finished difference. Result has 163 places, 160 transitions, 692 flow [2022-11-16 10:54:14,401 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=692, PETRI_PLACES=163, PETRI_TRANSITIONS=160} [2022-11-16 10:54:14,404 INFO L288 CegarLoopForPetriNet]: 135 programPoint places, 28 predicate places. [2022-11-16 10:54:14,405 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 160 transitions, 692 flow [2022-11-16 10:54:14,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 101.66666666666667) internal successors, (610), 6 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:54:14,405 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:54:14,406 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:54:14,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 10:54:14,406 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-16 10:54:14,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:54:14,407 INFO L85 PathProgramCache]: Analyzing trace with hash -907115666, now seen corresponding path program 1 times [2022-11-16 10:54:14,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:54:14,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900859724] [2022-11-16 10:54:14,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:54:14,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:54:14,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:54:14,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:54:14,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:54:14,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900859724] [2022-11-16 10:54:14,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900859724] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:54:14,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:54:14,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 10:54:14,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735235937] [2022-11-16 10:54:14,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:54:14,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 10:54:14,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:54:14,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 10:54:14,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-16 10:54:14,863 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 149 [2022-11-16 10:54:14,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 160 transitions, 692 flow. Second operand has 6 states, 6 states have (on average 84.33333333333333) internal successors, (506), 6 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:54:14,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:54:14,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 149 [2022-11-16 10:54:14,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:54:23,493 INFO L130 PetriNetUnfolder]: 42908/63059 cut-off events. [2022-11-16 10:54:23,493 INFO L131 PetriNetUnfolder]: For 123256/123340 co-relation queries the response was YES. [2022-11-16 10:54:23,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190907 conditions, 63059 events. 42908/63059 cut-off events. For 123256/123340 co-relation queries the response was YES. Maximal size of possible extension queue 2196. Compared 453037 event pairs, 29835 based on Foata normal form. 34/62765 useless extension candidates. Maximal degree in co-relation 190886. Up to 57668 conditions per place. [2022-11-16 10:54:24,042 INFO L137 encePairwiseOnDemand]: 138/149 looper letters, 112 selfloop transitions, 16 changer transitions 5/195 dead transitions. [2022-11-16 10:54:24,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 195 transitions, 1197 flow [2022-11-16 10:54:24,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 10:54:24,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-16 10:54:24,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 562 transitions. [2022-11-16 10:54:24,045 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6286353467561522 [2022-11-16 10:54:24,045 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 562 transitions. [2022-11-16 10:54:24,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 562 transitions. [2022-11-16 10:54:24,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:54:24,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 562 transitions. [2022-11-16 10:54:24,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 93.66666666666667) internal successors, (562), 6 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:54:24,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 149.0) internal successors, (1043), 7 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:54:24,051 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 149.0) internal successors, (1043), 7 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:54:24,051 INFO L175 Difference]: Start difference. First operand has 163 places, 160 transitions, 692 flow. Second operand 6 states and 562 transitions. [2022-11-16 10:54:24,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 195 transitions, 1197 flow [2022-11-16 10:54:24,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 195 transitions, 1185 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-11-16 10:54:24,321 INFO L231 Difference]: Finished difference. Result has 168 places, 165 transitions, 803 flow [2022-11-16 10:54:24,322 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=684, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=803, PETRI_PLACES=168, PETRI_TRANSITIONS=165} [2022-11-16 10:54:24,322 INFO L288 CegarLoopForPetriNet]: 135 programPoint places, 33 predicate places. [2022-11-16 10:54:24,323 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 165 transitions, 803 flow [2022-11-16 10:54:24,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 84.33333333333333) internal successors, (506), 6 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:54:24,323 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:54:24,323 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:54:24,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 10:54:24,324 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-16 10:54:24,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:54:24,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1482922462, now seen corresponding path program 1 times [2022-11-16 10:54:24,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:54:24,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601897774] [2022-11-16 10:54:24,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:54:24,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:54:24,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:54:24,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:54:24,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:54:24,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601897774] [2022-11-16 10:54:24,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601897774] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:54:24,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:54:24,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 10:54:24,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264881649] [2022-11-16 10:54:24,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:54:24,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 10:54:24,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:54:24,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 10:54:24,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 10:54:24,785 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 149 [2022-11-16 10:54:24,786 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 165 transitions, 803 flow. Second operand has 7 states, 7 states have (on average 83.42857142857143) internal successors, (584), 7 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:54:24,786 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:54:24,786 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 149 [2022-11-16 10:54:24,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:54:34,569 INFO L130 PetriNetUnfolder]: 52329/78245 cut-off events. [2022-11-16 10:54:34,569 INFO L131 PetriNetUnfolder]: For 166341/166410 co-relation queries the response was YES. [2022-11-16 10:54:34,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238461 conditions, 78245 events. 52329/78245 cut-off events. For 166341/166410 co-relation queries the response was YES. Maximal size of possible extension queue 2991. Compared 603008 event pairs, 24152 based on Foata normal form. 1360/79222 useless extension candidates. Maximal degree in co-relation 238437. Up to 50836 conditions per place. [2022-11-16 10:54:35,146 INFO L137 encePairwiseOnDemand]: 139/149 looper letters, 165 selfloop transitions, 22 changer transitions 2/251 dead transitions. [2022-11-16 10:54:35,146 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 251 transitions, 1687 flow [2022-11-16 10:54:35,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 10:54:35,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 10:54:35,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 677 transitions. [2022-11-16 10:54:35,149 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6490891658676894 [2022-11-16 10:54:35,150 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 677 transitions. [2022-11-16 10:54:35,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 677 transitions. [2022-11-16 10:54:35,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:54:35,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 677 transitions. [2022-11-16 10:54:35,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 96.71428571428571) internal successors, (677), 7 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:54:35,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 149.0) internal successors, (1192), 8 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:54:35,155 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 149.0) internal successors, (1192), 8 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:54:35,155 INFO L175 Difference]: Start difference. First operand has 168 places, 165 transitions, 803 flow. Second operand 7 states and 677 transitions. [2022-11-16 10:54:35,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 251 transitions, 1687 flow [2022-11-16 10:54:36,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 251 transitions, 1629 flow, removed 20 selfloop flow, removed 3 redundant places. [2022-11-16 10:54:36,682 INFO L231 Difference]: Finished difference. Result has 175 places, 170 transitions, 905 flow [2022-11-16 10:54:36,682 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=905, PETRI_PLACES=175, PETRI_TRANSITIONS=170} [2022-11-16 10:54:36,683 INFO L288 CegarLoopForPetriNet]: 135 programPoint places, 40 predicate places. [2022-11-16 10:54:36,683 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 170 transitions, 905 flow [2022-11-16 10:54:36,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.42857142857143) internal successors, (584), 7 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:54:36,684 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:54:36,684 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:54:36,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 10:54:36,684 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-16 10:54:36,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:54:36,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1881884424, now seen corresponding path program 2 times [2022-11-16 10:54:36,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:54:36,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285308446] [2022-11-16 10:54:36,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:54:36,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:54:36,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:54:36,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:54:36,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:54:36,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285308446] [2022-11-16 10:54:36,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285308446] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:54:36,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:54:36,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 10:54:36,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152706135] [2022-11-16 10:54:36,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:54:36,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 10:54:36,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:54:36,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 10:54:36,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 10:54:36,921 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 149 [2022-11-16 10:54:36,921 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 170 transitions, 905 flow. Second operand has 6 states, 6 states have (on average 101.66666666666667) internal successors, (610), 6 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:54:36,922 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:54:36,922 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 149 [2022-11-16 10:54:36,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:54:37,934 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([333] L38-1-->L38-2: Formula: (not (< (mod v_~x1~0_1 4294967296) (mod v_~n~0_1 4294967296))) InVars {~n~0=v_~n~0_1, ~x1~0=v_~x1~0_1} OutVars{~n~0=v_~n~0_1, ~x1~0=v_~x1~0_1} AuxVars[] AssignedVars[][66], [30#L109-4true, 42#L38-2true, 189#true, 18#L67true, Black: 830#(<= (+ ~x3~0 (* (div ~n~0 4294967296) 4294967296) 1) (+ ~n~0 (* (div ~x3~0 4294967296) 4294967296))), Black: 829#(<= (+ ~x3~0 (* (div ~x4~0 4294967296) 4294967296)) (+ ~x4~0 (* (div ~x3~0 4294967296) 4294967296))), 869#(<= (+ ~x4~0 (* (div ~x3~0 4294967296) 4294967296)) (+ ~x3~0 (* (div ~x4~0 4294967296) 4294967296))), Black: 825#true, 91#L54true, 155#true, Black: 844#(and (= (+ ~x4~0 (* (div ~x3~0 4294967296) 4294967296)) (+ ~x3~0 (* (div ~x4~0 4294967296) 4294967296))) (< (* (div ~x3~0 4294967296) 4294967296) ~x3~0) (= (+ (* (div ~x1~0 4294967296) 4294967296) ~x2~0) (+ ~x1~0 (* (div ~x2~0 4294967296) 4294967296))) (< (* (div ~x1~0 4294967296) 4294967296) ~x1~0)), Black: 845#(and (not (<= ~x1~0 (* (div ~x1~0 4294967296) 4294967296))) (= (+ ~x4~0 (* (div ~x3~0 4294967296) 4294967296)) (+ ~x3~0 (* (div ~x4~0 4294967296) 4294967296))) (<= (+ ~n~0 (* (div ~x2~0 4294967296) 4294967296)) (+ ~x2~0 (* (div ~n~0 4294967296) 4294967296))) (not (<= ~x3~0 (* (div ~x3~0 4294967296) 4294967296))) (= (+ (* (div ~x1~0 4294967296) 4294967296) ~x2~0) (+ ~x1~0 (* (div ~x2~0 4294967296) 4294967296)))), 834#(and (<= (+ ~x3~0 (* (div ~n~0 4294967296) 4294967296) 1) (+ ~n~0 (* (div ~x3~0 4294967296) 4294967296))) (<= (+ ~x3~0 (* (div ~x4~0 4294967296) 4294967296)) (+ ~x4~0 (* (div ~x3~0 4294967296) 4294967296)))), Black: 851#true, Black: 856#(and (<= (+ ~x4~0 (* (div ~n~0 4294967296) 4294967296) 1) (+ ~n~0 (* (div ~x4~0 4294967296) 4294967296))) (not (<= ~x1~0 (* (div ~x1~0 4294967296) 4294967296))) (= (+ ~x4~0 (* (div ~x3~0 4294967296) 4294967296)) (+ ~x3~0 (* (div ~x4~0 4294967296) 4294967296))) (not (<= ~x3~0 (* (div ~x3~0 4294967296) 4294967296))) (= (+ (* (div ~x1~0 4294967296) 4294967296) ~x2~0) (+ ~x1~0 (* (div ~x2~0 4294967296) 4294967296)))), Black: 855#(and (= (+ ~x4~0 (* (div ~x3~0 4294967296) 4294967296)) (+ ~x3~0 (* (div ~x4~0 4294967296) 4294967296))) (< (* (div ~x3~0 4294967296) 4294967296) ~x3~0) (= (+ (* (div ~x1~0 4294967296) 4294967296) ~x2~0) (+ ~x1~0 (* (div ~x2~0 4294967296) 4294967296))) (< (* (div ~x1~0 4294967296) 4294967296) ~x1~0)), Black: 162#(and (= (+ ~x4~0 (* (div ~x3~0 4294967296) 4294967296)) (+ ~x3~0 (* (div ~x4~0 4294967296) 4294967296))) (= (+ (* (div ~x1~0 4294967296) 4294967296) ~x2~0) (+ ~x1~0 (* (div ~x2~0 4294967296) 4294967296)))), Black: 808#(and (= (mod ~x2~0 4294967296) (mod ~x1~0 4294967296)) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (< 0 (mod ~x1~0 4294967296))), Black: 195#(<= (+ ~x2~0 (* (div ~n~0 4294967296) 4294967296) 1) (+ ~n~0 (* (div ~x2~0 4294967296) 4294967296))), Black: 806#(and (< (mod ~x2~0 4294967296) (mod ~n~0 4294967296)) (< 0 (mod ~x2~0 4294967296)) (< ~x2~0 (+ (mod ~x1~0 4294967296) (* (div ~x2~0 4294967296) 4294967296) 1))), Black: 810#(and (= (mod ~x2~0 4294967296) (mod ~x1~0 4294967296)) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (< (mod ~x2~0 4294967296) (mod ~n~0 4294967296)) (< 0 (mod ~x1~0 4294967296))), 179#(<= (+ ~x3~0 (* (div ~x4~0 4294967296) 4294967296)) (+ ~x4~0 (* (div ~x3~0 4294967296) 4294967296))), Black: 804#(and (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (not (<= ~x1~0 (* (div ~x1~0 4294967296) 4294967296))) (= (+ ~x4~0 (* (div ~x3~0 4294967296) 4294967296)) (+ ~x3~0 (* (div ~x4~0 4294967296) 4294967296))) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (not (<= ~x3~0 (* (div ~x3~0 4294967296) 4294967296))) (= (+ (* (div ~x1~0 4294967296) 4294967296) ~x2~0) (+ ~x1~0 (* (div ~x2~0 4294967296) 4294967296))) (<= (+ ~x2~0 (* (div ~n~0 4294967296) 4294967296) 1) (+ ~n~0 (* (div ~x2~0 4294967296) 4294967296)))), Black: 802#(and (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (= (+ ~x4~0 (* (div ~x3~0 4294967296) 4294967296)) (+ ~x3~0 (* (div ~x4~0 4294967296) 4294967296))) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (< (* (div ~x3~0 4294967296) 4294967296) ~x3~0) (= (+ (* (div ~x1~0 4294967296) 4294967296) ~x2~0) (+ ~x1~0 (* (div ~x2~0 4294967296) 4294967296))) (< (* (div ~x1~0 4294967296) 4294967296) ~x1~0)), Black: 814#(and (= (mod ~x2~0 4294967296) (mod ~x1~0 4294967296)) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (< 0 (mod ~x1~0 4294967296))), Black: 388#(and (< (mod ~x2~0 4294967296) (mod ~n~0 4294967296)) (< 0 (mod ~x2~0 4294967296))), Black: 180#(<= (+ ~n~0 (* (div ~x4~0 4294967296) 4294967296)) (+ ~x4~0 (* (div ~n~0 4294967296) 4294967296))), Black: 184#(and (<= (+ ~n~0 (* (div ~x4~0 4294967296) 4294967296)) (+ ~x4~0 (* (div ~n~0 4294967296) 4294967296))) (<= (+ ~x3~0 (* (div ~x4~0 4294967296) 4294967296)) (+ ~x4~0 (* (div ~x3~0 4294967296) 4294967296)))), 857#(<= (+ ~x4~0 (* (div ~n~0 4294967296) 4294967296) 1) (+ ~n~0 (* (div ~x4~0 4294967296) 4294967296))), 55#L81true]) [2022-11-16 10:54:37,934 INFO L383 tUnfolder$Statistics]: this new event has 72 ancestors and is cut-off event [2022-11-16 10:54:37,935 INFO L386 tUnfolder$Statistics]: existing Event has 64 ancestors and is cut-off event [2022-11-16 10:54:37,935 INFO L386 tUnfolder$Statistics]: existing Event has 64 ancestors and is cut-off event [2022-11-16 10:54:37,935 INFO L386 tUnfolder$Statistics]: existing Event has 72 ancestors and is cut-off event [2022-11-16 10:54:40,294 INFO L130 PetriNetUnfolder]: 13130/21980 cut-off events. [2022-11-16 10:54:40,294 INFO L131 PetriNetUnfolder]: For 63017/64060 co-relation queries the response was YES. [2022-11-16 10:54:40,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74958 conditions, 21980 events. 13130/21980 cut-off events. For 63017/64060 co-relation queries the response was YES. Maximal size of possible extension queue 1653. Compared 188344 event pairs, 4826 based on Foata normal form. 164/20930 useless extension candidates. Maximal degree in co-relation 74931. Up to 15223 conditions per place. [2022-11-16 10:54:40,470 INFO L137 encePairwiseOnDemand]: 137/149 looper letters, 115 selfloop transitions, 21 changer transitions 2/227 dead transitions. [2022-11-16 10:54:40,470 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 227 transitions, 1479 flow [2022-11-16 10:54:40,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 10:54:40,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 10:54:40,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 763 transitions. [2022-11-16 10:54:40,473 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7315436241610739 [2022-11-16 10:54:40,473 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 763 transitions. [2022-11-16 10:54:40,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 763 transitions. [2022-11-16 10:54:40,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:54:40,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 763 transitions. [2022-11-16 10:54:40,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 109.0) internal successors, (763), 7 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:54:40,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 149.0) internal successors, (1192), 8 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:54:40,479 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 149.0) internal successors, (1192), 8 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:54:40,479 INFO L175 Difference]: Start difference. First operand has 175 places, 170 transitions, 905 flow. Second operand 7 states and 763 transitions. [2022-11-16 10:54:40,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 227 transitions, 1479 flow [2022-11-16 10:54:40,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 227 transitions, 1475 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-16 10:54:40,754 INFO L231 Difference]: Finished difference. Result has 182 places, 172 transitions, 967 flow [2022-11-16 10:54:40,755 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=838, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=967, PETRI_PLACES=182, PETRI_TRANSITIONS=172} [2022-11-16 10:54:40,755 INFO L288 CegarLoopForPetriNet]: 135 programPoint places, 47 predicate places. [2022-11-16 10:54:40,756 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 172 transitions, 967 flow [2022-11-16 10:54:40,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 101.66666666666667) internal successors, (610), 6 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:54:40,756 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:54:40,756 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:54:40,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 10:54:40,757 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-16 10:54:40,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:54:40,757 INFO L85 PathProgramCache]: Analyzing trace with hash -458456338, now seen corresponding path program 2 times [2022-11-16 10:54:40,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:54:40,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710171577] [2022-11-16 10:54:40,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:54:40,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:54:40,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:54:41,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:54:41,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:54:41,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710171577] [2022-11-16 10:54:41,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710171577] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 10:54:41,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171432398] [2022-11-16 10:54:41,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 10:54:41,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:54:41,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac11184b-081b-4611-8b9b-1f2be0fe0e0f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:54:41,115 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac11184b-081b-4611-8b9b-1f2be0fe0e0f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:54:41,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac11184b-081b-4611-8b9b-1f2be0fe0e0f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 10:54:41,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 10:54:41,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 10:54:41,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 10:54:41,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:54:41,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:54:41,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:54:42,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:54:42,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171432398] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:54:42,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 10:54:42,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-11-16 10:54:42,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797331739] [2022-11-16 10:54:42,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 10:54:42,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 10:54:42,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:54:42,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 10:54:42,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-11-16 10:54:42,256 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 149 [2022-11-16 10:54:42,258 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 172 transitions, 967 flow. Second operand has 14 states, 14 states have (on average 82.71428571428571) internal successors, (1158), 14 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:54:42,258 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:54:42,258 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 149 [2022-11-16 10:54:42,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand