./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/bench-exp2x6.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e0794d-0e17-4f9d-932e-72c0468cbb25/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e0794d-0e17-4f9d-932e-72c0468cbb25/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e0794d-0e17-4f9d-932e-72c0468cbb25/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e0794d-0e17-4f9d-932e-72c0468cbb25/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/bench-exp2x6.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e0794d-0e17-4f9d-932e-72c0468cbb25/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e0794d-0e17-4f9d-932e-72c0468cbb25/bin/uautomizer-ZXIjhQolGL --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 19006bb1633253053764e43b8bfff1653449498b05ea53714e3311a41e35d730 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 04:26:00,054 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 04:26:00,067 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 04:26:00,147 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 04:26:00,150 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 04:26:00,155 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 04:26:00,160 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 04:26:00,165 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 04:26:00,169 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 04:26:00,176 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 04:26:00,178 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 04:26:00,181 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 04:26:00,181 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 04:26:00,185 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 04:26:00,189 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 04:26:00,198 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 04:26:00,201 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 04:26:00,202 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 04:26:00,210 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 04:26:00,219 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 04:26:00,221 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 04:26:00,223 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 04:26:00,225 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 04:26:00,226 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 04:26:00,231 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 04:26:00,232 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 04:26:00,232 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 04:26:00,234 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 04:26:00,235 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 04:26:00,236 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 04:26:00,237 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 04:26:00,238 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 04:26:00,239 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 04:26:00,241 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 04:26:00,243 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 04:26:00,243 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 04:26:00,245 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 04:26:00,245 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 04:26:00,246 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 04:26:00,247 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 04:26:00,248 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 04:26:00,250 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e0794d-0e17-4f9d-932e-72c0468cbb25/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-19 04:26:00,290 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 04:26:00,293 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 04:26:00,294 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 04:26:00,299 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 04:26:00,300 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 04:26:00,300 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 04:26:00,302 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 04:26:00,302 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 04:26:00,302 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 04:26:00,303 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 04:26:00,304 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 04:26:00,304 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 04:26:00,305 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 04:26:00,305 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 04:26:00,305 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 04:26:00,306 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 04:26:00,306 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 04:26:00,306 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 04:26:00,307 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 04:26:00,307 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 04:26:00,307 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 04:26:00,308 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 04:26:00,308 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 04:26:00,308 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 04:26:00,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:26:00,309 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 04:26:00,309 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 04:26:00,310 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 04:26:00,310 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 04:26:00,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 04:26:00,312 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 04:26:00,313 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 04:26:00,313 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 04:26:00,313 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 04:26:00,314 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_33e0794d-0e17-4f9d-932e-72c0468cbb25/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e0794d-0e17-4f9d-932e-72c0468cbb25/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 19006bb1633253053764e43b8bfff1653449498b05ea53714e3311a41e35d730 [2021-11-19 04:26:00,636 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 04:26:00,662 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 04:26:00,665 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 04:26:00,667 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 04:26:00,668 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 04:26:00,670 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e0794d-0e17-4f9d-932e-72c0468cbb25/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/weaver/bench-exp2x6.wvr.c [2021-11-19 04:26:00,751 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e0794d-0e17-4f9d-932e-72c0468cbb25/bin/uautomizer-ZXIjhQolGL/data/7a882f4ee/ac287d347336410aacc991315324b419/FLAGffd58cd79 [2021-11-19 04:26:01,389 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 04:26:01,390 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e0794d-0e17-4f9d-932e-72c0468cbb25/sv-benchmarks/c/weaver/bench-exp2x6.wvr.c [2021-11-19 04:26:01,399 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e0794d-0e17-4f9d-932e-72c0468cbb25/bin/uautomizer-ZXIjhQolGL/data/7a882f4ee/ac287d347336410aacc991315324b419/FLAGffd58cd79 [2021-11-19 04:26:01,746 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e0794d-0e17-4f9d-932e-72c0468cbb25/bin/uautomizer-ZXIjhQolGL/data/7a882f4ee/ac287d347336410aacc991315324b419 [2021-11-19 04:26:01,749 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 04:26:01,751 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 04:26:01,753 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 04:26:01,753 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 04:26:01,758 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 04:26:01,759 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:26:01" (1/1) ... [2021-11-19 04:26:01,761 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35a28ddc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:26:01, skipping insertion in model container [2021-11-19 04:26:01,761 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:26:01" (1/1) ... [2021-11-19 04:26:01,768 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 04:26:01,792 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 04:26:02,081 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e0794d-0e17-4f9d-932e-72c0468cbb25/sv-benchmarks/c/weaver/bench-exp2x6.wvr.c[2453,2466] [2021-11-19 04:26:02,096 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:26:02,117 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 04:26:02,175 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e0794d-0e17-4f9d-932e-72c0468cbb25/sv-benchmarks/c/weaver/bench-exp2x6.wvr.c[2453,2466] [2021-11-19 04:26:02,188 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:26:02,207 INFO L208 MainTranslator]: Completed translation [2021-11-19 04:26:02,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:26:02 WrapperNode [2021-11-19 04:26:02,208 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 04:26:02,210 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 04:26:02,210 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 04:26:02,211 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 04:26:02,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:26:02" (1/1) ... [2021-11-19 04:26:02,243 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:26:02" (1/1) ... [2021-11-19 04:26:02,283 INFO L137 Inliner]: procedures = 20, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 91 [2021-11-19 04:26:02,284 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 04:26:02,285 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 04:26:02,285 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 04:26:02,286 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 04:26:02,296 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:26:02" (1/1) ... [2021-11-19 04:26:02,297 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:26:02" (1/1) ... [2021-11-19 04:26:02,319 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:26:02" (1/1) ... [2021-11-19 04:26:02,320 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:26:02" (1/1) ... [2021-11-19 04:26:02,325 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:26:02" (1/1) ... [2021-11-19 04:26:02,342 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:26:02" (1/1) ... [2021-11-19 04:26:02,344 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:26:02" (1/1) ... [2021-11-19 04:26:02,348 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 04:26:02,355 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 04:26:02,355 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 04:26:02,355 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 04:26:02,357 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:26:02" (1/1) ... [2021-11-19 04:26:02,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:26:02,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e0794d-0e17-4f9d-932e-72c0468cbb25/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:26:02,406 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e0794d-0e17-4f9d-932e-72c0468cbb25/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 04:26:02,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e0794d-0e17-4f9d-932e-72c0468cbb25/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 04:26:02,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 04:26:02,472 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-19 04:26:02,472 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-19 04:26:02,472 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-19 04:26:02,473 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-19 04:26:02,473 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-11-19 04:26:02,474 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-11-19 04:26:02,474 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-11-19 04:26:02,474 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-11-19 04:26:02,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 04:26:02,474 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 04:26:02,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-19 04:26:02,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 04:26:02,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 04:26:02,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-19 04:26:02,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 04:26:02,478 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-19 04:26:02,582 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 04:26:02,584 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 04:26:02,910 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 04:26:02,924 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 04:26:02,924 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-19 04:26:02,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:26:02 BoogieIcfgContainer [2021-11-19 04:26:02,927 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 04:26:02,929 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 04:26:02,930 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 04:26:02,942 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 04:26:02,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:26:01" (1/3) ... [2021-11-19 04:26:02,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@225ed27d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:26:02, skipping insertion in model container [2021-11-19 04:26:02,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:26:02" (2/3) ... [2021-11-19 04:26:02,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@225ed27d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:26:02, skipping insertion in model container [2021-11-19 04:26:02,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:26:02" (3/3) ... [2021-11-19 04:26:02,951 INFO L111 eAbstractionObserver]: Analyzing ICFG bench-exp2x6.wvr.c [2021-11-19 04:26:02,958 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-19 04:26:02,958 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 04:26:02,959 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 04:26:02,959 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-19 04:26:03,007 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 04:26:03,007 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 04:26:03,008 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 04:26:03,008 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 04:26:03,009 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 04:26:03,010 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 04:26:03,010 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 04:26:03,010 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 04:26:03,012 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 04:26:03,012 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 04:26:03,012 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 04:26:03,013 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 04:26:03,014 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 04:26:03,014 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 04:26:03,015 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 04:26:03,015 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 04:26:03,019 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 04:26:03,020 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 04:26:03,024 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 04:26:03,024 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 04:26:03,026 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 04:26:03,026 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 04:26:03,028 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 04:26:03,028 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 04:26:03,035 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-11-19 04:26:03,122 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 04:26:03,137 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 04:26:03,137 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-19 04:26:03,158 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 140 places, 137 transitions, 306 flow [2021-11-19 04:26:03,290 INFO L129 PetriNetUnfolder]: 10/133 cut-off events. [2021-11-19 04:26:03,290 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-11-19 04:26:03,298 INFO L84 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 133 events. 10/133 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 91 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 93. Up to 2 conditions per place. [2021-11-19 04:26:03,299 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 137 transitions, 306 flow [2021-11-19 04:26:03,307 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 123 places, 120 transitions, 264 flow [2021-11-19 04:26:03,364 INFO L129 PetriNetUnfolder]: 10/119 cut-off events. [2021-11-19 04:26:03,364 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-11-19 04:26:03,364 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 04:26:03,365 INFO L254 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] [2021-11-19 04:26:03,366 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-19 04:26:03,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:26:03,373 INFO L85 PathProgramCache]: Analyzing trace with hash 681650960, now seen corresponding path program 1 times [2021-11-19 04:26:03,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:26:03,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835799852] [2021-11-19 04:26:03,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:26:03,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:26:03,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:26:03,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:26:03,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:26:03,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835799852] [2021-11-19 04:26:03,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835799852] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:26:03,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:26:03,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 04:26:03,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981371609] [2021-11-19 04:26:03,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:26:03,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 04:26:03,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:26:03,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 04:26:03,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 04:26:03,791 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 137 [2021-11-19 04:26:03,795 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 120 transitions, 264 flow. Second operand has 2 states, 2 states have (on average 127.0) internal successors, (254), 2 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:03,801 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 04:26:03,801 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 137 [2021-11-19 04:26:03,803 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 04:26:03,931 INFO L129 PetriNetUnfolder]: 4/114 cut-off events. [2021-11-19 04:26:03,942 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2021-11-19 04:26:03,944 INFO L84 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 114 events. 4/114 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 84 event pairs, 0 based on Foata normal form. 18/126 useless extension candidates. Maximal degree in co-relation 92. Up to 9 conditions per place. [2021-11-19 04:26:03,948 INFO L132 encePairwiseOnDemand]: 131/137 looper letters, 8 selfloop transitions, 0 changer transitions 2/114 dead transitions. [2021-11-19 04:26:03,950 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 114 transitions, 268 flow [2021-11-19 04:26:03,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 04:26:03,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-11-19 04:26:03,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 258 transitions. [2021-11-19 04:26:03,980 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9416058394160584 [2021-11-19 04:26:03,981 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 258 transitions. [2021-11-19 04:26:03,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 258 transitions. [2021-11-19 04:26:03,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 04:26:03,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 258 transitions. [2021-11-19 04:26:04,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 129.0) internal successors, (258), 2 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:04,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:04,016 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:04,023 INFO L186 Difference]: Start difference. First operand has 123 places, 120 transitions, 264 flow. Second operand 2 states and 258 transitions. [2021-11-19 04:26:04,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 114 transitions, 268 flow [2021-11-19 04:26:04,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 114 transitions, 252 flow, removed 0 selfloop flow, removed 8 redundant places. [2021-11-19 04:26:04,052 INFO L242 Difference]: Finished difference. Result has 116 places, 112 transitions, 232 flow [2021-11-19 04:26:04,057 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=232, PETRI_PLACES=116, PETRI_TRANSITIONS=112} [2021-11-19 04:26:04,063 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, -7 predicate places. [2021-11-19 04:26:04,064 INFO L470 AbstractCegarLoop]: Abstraction has has 116 places, 112 transitions, 232 flow [2021-11-19 04:26:04,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 127.0) internal successors, (254), 2 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:04,070 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 04:26:04,070 INFO L254 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] [2021-11-19 04:26:04,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 04:26:04,071 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-19 04:26:04,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:26:04,072 INFO L85 PathProgramCache]: Analyzing trace with hash -712841604, now seen corresponding path program 1 times [2021-11-19 04:26:04,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:26:04,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549703862] [2021-11-19 04:26:04,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:26:04,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:26:04,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:26:04,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:26:04,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:26:04,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549703862] [2021-11-19 04:26:04,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549703862] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:26:04,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:26:04,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 04:26:04,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801307140] [2021-11-19 04:26:04,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:26:04,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 04:26:04,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:26:04,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 04:26:04,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:26:04,955 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 137 [2021-11-19 04:26:04,956 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 112 transitions, 232 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) [2021-11-19 04:26:04,957 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 04:26:04,957 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 137 [2021-11-19 04:26:04,957 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 04:26:07,129 INFO L129 PetriNetUnfolder]: 5788/8844 cut-off events. [2021-11-19 04:26:07,129 INFO L130 PetriNetUnfolder]: For 299/351 co-relation queries the response was YES. [2021-11-19 04:26:07,165 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16925 conditions, 8844 events. 5788/8844 cut-off events. For 299/351 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 52550 event pairs, 3285 based on Foata normal form. 1/7225 useless extension candidates. Maximal degree in co-relation 16922. Up to 7342 conditions per place. [2021-11-19 04:26:07,320 INFO L132 encePairwiseOnDemand]: 127/137 looper letters, 59 selfloop transitions, 7 changer transitions 4/134 dead transitions. [2021-11-19 04:26:07,320 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 134 transitions, 423 flow [2021-11-19 04:26:07,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:26:07,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-19 04:26:07,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 631 transitions. [2021-11-19 04:26:07,328 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6579770594369134 [2021-11-19 04:26:07,328 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 631 transitions. [2021-11-19 04:26:07,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 631 transitions. [2021-11-19 04:26:07,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 04:26:07,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 631 transitions. [2021-11-19 04:26:07,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 90.14285714285714) internal successors, (631), 7 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:07,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:07,343 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:07,343 INFO L186 Difference]: Start difference. First operand has 116 places, 112 transitions, 232 flow. Second operand 7 states and 631 transitions. [2021-11-19 04:26:07,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 134 transitions, 423 flow [2021-11-19 04:26:07,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 134 transitions, 423 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-19 04:26:07,354 INFO L242 Difference]: Finished difference. Result has 123 places, 116 transitions, 273 flow [2021-11-19 04:26:07,355 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=273, PETRI_PLACES=123, PETRI_TRANSITIONS=116} [2021-11-19 04:26:07,356 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 0 predicate places. [2021-11-19 04:26:07,357 INFO L470 AbstractCegarLoop]: Abstraction has has 123 places, 116 transitions, 273 flow [2021-11-19 04:26:07,358 INFO L471 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) [2021-11-19 04:26:07,358 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 04:26:07,359 INFO L254 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] [2021-11-19 04:26:07,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 04:26:07,360 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-19 04:26:07,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:26:07,362 INFO L85 PathProgramCache]: Analyzing trace with hash 577411595, now seen corresponding path program 1 times [2021-11-19 04:26:07,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:26:07,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190176369] [2021-11-19 04:26:07,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:26:07,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:26:07,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:26:08,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:26:08,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:26:08,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190176369] [2021-11-19 04:26:08,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190176369] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:26:08,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513966993] [2021-11-19 04:26:08,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:26:08,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:26:08,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e0794d-0e17-4f9d-932e-72c0468cbb25/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:26:08,032 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e0794d-0e17-4f9d-932e-72c0468cbb25/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:26:08,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e0794d-0e17-4f9d-932e-72c0468cbb25/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 04:26:08,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:26:08,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 04:26:08,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:26:09,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:26:09,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:26:09,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:26:09,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513966993] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:26:09,707 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:26:09,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2021-11-19 04:26:09,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774538395] [2021-11-19 04:26:09,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:26:09,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 04:26:09,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:26:09,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 04:26:09,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:26:09,716 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 137 [2021-11-19 04:26:09,719 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 116 transitions, 273 flow. Second operand has 14 states, 14 states have (on average 82.14285714285714) internal successors, (1150), 14 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:09,719 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 04:26:09,719 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 137 [2021-11-19 04:26:09,719 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 04:26:13,392 INFO L129 PetriNetUnfolder]: 9819/14645 cut-off events. [2021-11-19 04:26:13,392 INFO L130 PetriNetUnfolder]: For 2273/2347 co-relation queries the response was YES. [2021-11-19 04:26:13,445 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31222 conditions, 14645 events. 9819/14645 cut-off events. For 2273/2347 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 93700 event pairs, 1381 based on Foata normal form. 2/12414 useless extension candidates. Maximal degree in co-relation 31215. Up to 6565 conditions per place. [2021-11-19 04:26:13,586 INFO L132 encePairwiseOnDemand]: 122/137 looper letters, 181 selfloop transitions, 26 changer transitions 1/270 dead transitions. [2021-11-19 04:26:13,587 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 270 transitions, 1086 flow [2021-11-19 04:26:13,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 04:26:13,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-11-19 04:26:13,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1306 transitions. [2021-11-19 04:26:13,598 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6809176225234619 [2021-11-19 04:26:13,598 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1306 transitions. [2021-11-19 04:26:13,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1306 transitions. [2021-11-19 04:26:13,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 04:26:13,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1306 transitions. [2021-11-19 04:26:13,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 93.28571428571429) internal successors, (1306), 14 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:13,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 137.0) internal successors, (2055), 15 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:13,617 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 137.0) internal successors, (2055), 15 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:13,618 INFO L186 Difference]: Start difference. First operand has 123 places, 116 transitions, 273 flow. Second operand 14 states and 1306 transitions. [2021-11-19 04:26:13,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 270 transitions, 1086 flow [2021-11-19 04:26:13,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 270 transitions, 1063 flow, removed 6 selfloop flow, removed 5 redundant places. [2021-11-19 04:26:13,631 INFO L242 Difference]: Finished difference. Result has 138 places, 132 transitions, 434 flow [2021-11-19 04:26:13,632 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=434, PETRI_PLACES=138, PETRI_TRANSITIONS=132} [2021-11-19 04:26:13,633 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 15 predicate places. [2021-11-19 04:26:13,634 INFO L470 AbstractCegarLoop]: Abstraction has has 138 places, 132 transitions, 434 flow [2021-11-19 04:26:13,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 82.14285714285714) internal successors, (1150), 14 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:13,635 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 04:26:13,635 INFO L254 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] [2021-11-19 04:26:13,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e0794d-0e17-4f9d-932e-72c0468cbb25/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 04:26:13,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e0794d-0e17-4f9d-932e-72c0468cbb25/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:26:13,859 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-19 04:26:13,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:26:13,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1860705257, now seen corresponding path program 2 times [2021-11-19 04:26:13,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:26:13,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184443701] [2021-11-19 04:26:13,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:26:13,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:26:13,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:26:14,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:26:14,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:26:14,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184443701] [2021-11-19 04:26:14,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184443701] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:26:14,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:26:14,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 04:26:14,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154660779] [2021-11-19 04:26:14,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:26:14,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:26:14,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:26:14,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:26:14,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:26:14,230 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 137 [2021-11-19 04:26:14,231 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 132 transitions, 434 flow. Second operand has 6 states, 6 states have (on average 83.83333333333333) internal successors, (503), 6 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:14,231 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 04:26:14,231 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 137 [2021-11-19 04:26:14,231 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 04:26:17,260 INFO L129 PetriNetUnfolder]: 9701/14949 cut-off events. [2021-11-19 04:26:17,261 INFO L130 PetriNetUnfolder]: For 20337/20376 co-relation queries the response was YES. [2021-11-19 04:26:17,333 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40019 conditions, 14949 events. 9701/14949 cut-off events. For 20337/20376 co-relation queries the response was YES. Maximal size of possible extension queue 789. Compared 98630 event pairs, 5870 based on Foata normal form. 35/13537 useless extension candidates. Maximal degree in co-relation 40006. Up to 12875 conditions per place. [2021-11-19 04:26:17,474 INFO L132 encePairwiseOnDemand]: 126/137 looper letters, 82 selfloop transitions, 13 changer transitions 1/158 dead transitions. [2021-11-19 04:26:17,474 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 158 transitions, 742 flow [2021-11-19 04:26:17,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 04:26:17,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-19 04:26:17,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 550 transitions. [2021-11-19 04:26:17,478 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6690997566909975 [2021-11-19 04:26:17,478 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 550 transitions. [2021-11-19 04:26:17,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 550 transitions. [2021-11-19 04:26:17,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 04:26:17,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 550 transitions. [2021-11-19 04:26:17,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 91.66666666666667) internal successors, (550), 6 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:17,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:17,486 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:17,486 INFO L186 Difference]: Start difference. First operand has 138 places, 132 transitions, 434 flow. Second operand 6 states and 550 transitions. [2021-11-19 04:26:17,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 158 transitions, 742 flow [2021-11-19 04:26:17,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 158 transitions, 727 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-11-19 04:26:17,540 INFO L242 Difference]: Finished difference. Result has 141 places, 136 transitions, 502 flow [2021-11-19 04:26:17,541 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=502, PETRI_PLACES=141, PETRI_TRANSITIONS=136} [2021-11-19 04:26:17,543 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 18 predicate places. [2021-11-19 04:26:17,543 INFO L470 AbstractCegarLoop]: Abstraction has has 141 places, 136 transitions, 502 flow [2021-11-19 04:26:17,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 83.83333333333333) internal successors, (503), 6 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:17,546 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 04:26:17,547 INFO L254 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] [2021-11-19 04:26:17,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 04:26:17,547 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-19 04:26:17,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:26:17,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1363116026, now seen corresponding path program 1 times [2021-11-19 04:26:17,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:26:17,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762260745] [2021-11-19 04:26:17,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:26:17,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:26:17,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:26:17,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:26:17,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:26:17,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762260745] [2021-11-19 04:26:17,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762260745] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:26:17,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:26:17,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 04:26:17,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389031271] [2021-11-19 04:26:17,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:26:17,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:26:17,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:26:17,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:26:17,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:26:17,921 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 137 [2021-11-19 04:26:17,922 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 136 transitions, 502 flow. Second operand has 6 states, 6 states have (on average 83.83333333333333) internal successors, (503), 6 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:17,922 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 04:26:17,923 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 137 [2021-11-19 04:26:17,923 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 04:26:21,057 INFO L129 PetriNetUnfolder]: 9680/14924 cut-off events. [2021-11-19 04:26:21,057 INFO L130 PetriNetUnfolder]: For 24241/24318 co-relation queries the response was YES. [2021-11-19 04:26:21,134 INFO L84 FinitePrefix]: Finished finitePrefix Result has 41046 conditions, 14924 events. 9680/14924 cut-off events. For 24241/24318 co-relation queries the response was YES. Maximal size of possible extension queue 779. Compared 98765 event pairs, 5804 based on Foata normal form. 0/13506 useless extension candidates. Maximal degree in co-relation 41030. Up to 12875 conditions per place. [2021-11-19 04:26:21,296 INFO L132 encePairwiseOnDemand]: 126/137 looper letters, 88 selfloop transitions, 21 changer transitions 1/172 dead transitions. [2021-11-19 04:26:21,296 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 172 transitions, 964 flow [2021-11-19 04:26:21,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 04:26:21,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-19 04:26:21,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 552 transitions. [2021-11-19 04:26:21,301 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6715328467153284 [2021-11-19 04:26:21,301 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 552 transitions. [2021-11-19 04:26:21,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 552 transitions. [2021-11-19 04:26:21,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 04:26:21,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 552 transitions. [2021-11-19 04:26:21,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 92.0) internal successors, (552), 6 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:21,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:21,309 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:21,310 INFO L186 Difference]: Start difference. First operand has 141 places, 136 transitions, 502 flow. Second operand 6 states and 552 transitions. [2021-11-19 04:26:21,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 172 transitions, 964 flow [2021-11-19 04:26:21,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 172 transitions, 907 flow, removed 18 selfloop flow, removed 3 redundant places. [2021-11-19 04:26:21,353 INFO L242 Difference]: Finished difference. Result has 145 places, 146 transitions, 620 flow [2021-11-19 04:26:21,354 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=620, PETRI_PLACES=145, PETRI_TRANSITIONS=146} [2021-11-19 04:26:21,357 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 22 predicate places. [2021-11-19 04:26:21,357 INFO L470 AbstractCegarLoop]: Abstraction has has 145 places, 146 transitions, 620 flow [2021-11-19 04:26:21,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 83.83333333333333) internal successors, (503), 6 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:21,358 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 04:26:21,359 INFO L254 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] [2021-11-19 04:26:21,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 04:26:21,359 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-19 04:26:21,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:26:21,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1231001328, now seen corresponding path program 2 times [2021-11-19 04:26:21,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:26:21,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907011143] [2021-11-19 04:26:21,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:26:21,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:26:21,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:26:21,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:26:21,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:26:21,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907011143] [2021-11-19 04:26:21,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907011143] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:26:21,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:26:21,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 04:26:21,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287719279] [2021-11-19 04:26:21,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:26:21,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:26:21,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:26:21,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:26:21,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:26:21,739 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 137 [2021-11-19 04:26:21,740 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 146 transitions, 620 flow. Second operand has 6 states, 6 states have (on average 83.83333333333333) internal successors, (503), 6 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:21,740 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 04:26:21,741 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 137 [2021-11-19 04:26:21,741 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 04:26:24,295 INFO L129 PetriNetUnfolder]: 9627/14765 cut-off events. [2021-11-19 04:26:24,296 INFO L130 PetriNetUnfolder]: For 21918/21980 co-relation queries the response was YES. [2021-11-19 04:26:24,385 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42052 conditions, 14765 events. 9627/14765 cut-off events. For 21918/21980 co-relation queries the response was YES. Maximal size of possible extension queue 797. Compared 98214 event pairs, 4771 based on Foata normal form. 20/14575 useless extension candidates. Maximal degree in co-relation 42034. Up to 12846 conditions per place. [2021-11-19 04:26:24,521 INFO L132 encePairwiseOnDemand]: 126/137 looper letters, 89 selfloop transitions, 17 changer transitions 2/170 dead transitions. [2021-11-19 04:26:24,521 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 170 transitions, 942 flow [2021-11-19 04:26:24,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 04:26:24,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-19 04:26:24,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 550 transitions. [2021-11-19 04:26:24,532 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6690997566909975 [2021-11-19 04:26:24,532 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 550 transitions. [2021-11-19 04:26:24,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 550 transitions. [2021-11-19 04:26:24,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 04:26:24,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 550 transitions. [2021-11-19 04:26:24,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 91.66666666666667) internal successors, (550), 6 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:24,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:24,540 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:24,540 INFO L186 Difference]: Start difference. First operand has 145 places, 146 transitions, 620 flow. Second operand 6 states and 550 transitions. [2021-11-19 04:26:24,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 170 transitions, 942 flow [2021-11-19 04:26:24,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 170 transitions, 925 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-11-19 04:26:24,590 INFO L242 Difference]: Finished difference. Result has 149 places, 144 transitions, 622 flow [2021-11-19 04:26:24,591 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=533, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=622, PETRI_PLACES=149, PETRI_TRANSITIONS=144} [2021-11-19 04:26:24,595 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 26 predicate places. [2021-11-19 04:26:24,595 INFO L470 AbstractCegarLoop]: Abstraction has has 149 places, 144 transitions, 622 flow [2021-11-19 04:26:24,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 83.83333333333333) internal successors, (503), 6 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:24,596 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 04:26:24,596 INFO L254 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] [2021-11-19 04:26:24,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 04:26:24,597 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-19 04:26:24,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:26:24,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1023841191, now seen corresponding path program 1 times [2021-11-19 04:26:24,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:26:24,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513363722] [2021-11-19 04:26:24,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:26:24,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:26:24,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:26:24,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:26:24,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:26:24,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513363722] [2021-11-19 04:26:24,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513363722] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:26:24,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606403317] [2021-11-19 04:26:24,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:26:24,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:26:24,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e0794d-0e17-4f9d-932e-72c0468cbb25/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:26:24,982 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e0794d-0e17-4f9d-932e-72c0468cbb25/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:26:25,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e0794d-0e17-4f9d-932e-72c0468cbb25/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 04:26:25,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:26:25,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 04:26:25,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:26:25,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:26:25,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:26:27,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:26:27,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606403317] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:26:27,839 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:26:27,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2021-11-19 04:26:27,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363158760] [2021-11-19 04:26:27,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:26:27,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 04:26:27,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:26:27,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 04:26:27,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:26:27,843 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 137 [2021-11-19 04:26:27,846 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 144 transitions, 622 flow. Second operand has 14 states, 14 states have (on average 82.92857142857143) internal successors, (1161), 14 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:27,846 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 04:26:27,846 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 137 [2021-11-19 04:26:27,846 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 04:26:32,655 INFO L129 PetriNetUnfolder]: 15101/24364 cut-off events. [2021-11-19 04:26:32,656 INFO L130 PetriNetUnfolder]: For 38242/38300 co-relation queries the response was YES. [2021-11-19 04:26:32,799 INFO L84 FinitePrefix]: Finished finitePrefix Result has 70434 conditions, 24364 events. 15101/24364 cut-off events. For 38242/38300 co-relation queries the response was YES. Maximal size of possible extension queue 1199. Compared 183372 event pairs, 1902 based on Foata normal form. 603/24673 useless extension candidates. Maximal degree in co-relation 70414. Up to 10026 conditions per place. [2021-11-19 04:26:33,014 INFO L132 encePairwiseOnDemand]: 122/137 looper letters, 253 selfloop transitions, 32 changer transitions 2/349 dead transitions. [2021-11-19 04:26:33,015 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 349 transitions, 2256 flow [2021-11-19 04:26:33,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 04:26:33,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-11-19 04:26:33,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1303 transitions. [2021-11-19 04:26:33,023 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6793534932221064 [2021-11-19 04:26:33,023 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1303 transitions. [2021-11-19 04:26:33,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1303 transitions. [2021-11-19 04:26:33,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 04:26:33,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1303 transitions. [2021-11-19 04:26:33,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 93.07142857142857) internal successors, (1303), 14 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:33,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 137.0) internal successors, (2055), 15 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:33,040 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 137.0) internal successors, (2055), 15 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:33,041 INFO L186 Difference]: Start difference. First operand has 149 places, 144 transitions, 622 flow. Second operand 14 states and 1303 transitions. [2021-11-19 04:26:33,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 349 transitions, 2256 flow [2021-11-19 04:26:33,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 349 transitions, 2215 flow, removed 12 selfloop flow, removed 3 redundant places. [2021-11-19 04:26:33,178 INFO L242 Difference]: Finished difference. Result has 166 places, 156 transitions, 776 flow [2021-11-19 04:26:33,179 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=601, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=776, PETRI_PLACES=166, PETRI_TRANSITIONS=156} [2021-11-19 04:26:33,180 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 43 predicate places. [2021-11-19 04:26:33,180 INFO L470 AbstractCegarLoop]: Abstraction has has 166 places, 156 transitions, 776 flow [2021-11-19 04:26:33,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 82.92857142857143) internal successors, (1161), 14 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:33,181 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 04:26:33,182 INFO L254 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] [2021-11-19 04:26:33,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e0794d-0e17-4f9d-932e-72c0468cbb25/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 04:26:33,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e0794d-0e17-4f9d-932e-72c0468cbb25/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-19 04:26:33,407 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-19 04:26:33,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:26:33,408 INFO L85 PathProgramCache]: Analyzing trace with hash -951928704, now seen corresponding path program 3 times [2021-11-19 04:26:33,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:26:33,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856377614] [2021-11-19 04:26:33,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:26:33,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:26:33,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:26:33,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:26:33,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:26:33,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856377614] [2021-11-19 04:26:33,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856377614] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:26:33,795 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:26:33,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 04:26:33,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430166501] [2021-11-19 04:26:33,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:26:33,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 04:26:33,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:26:33,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 04:26:33,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:26:33,799 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 137 [2021-11-19 04:26:33,800 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 156 transitions, 776 flow. Second operand has 7 states, 7 states have (on average 83.0) internal successors, (581), 7 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:33,800 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 04:26:33,800 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 137 [2021-11-19 04:26:33,801 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 04:26:38,223 INFO L129 PetriNetUnfolder]: 16638/25470 cut-off events. [2021-11-19 04:26:38,223 INFO L130 PetriNetUnfolder]: For 61733/61795 co-relation queries the response was YES. [2021-11-19 04:26:38,391 INFO L84 FinitePrefix]: Finished finitePrefix Result has 86463 conditions, 25470 events. 16638/25470 cut-off events. For 61733/61795 co-relation queries the response was YES. Maximal size of possible extension queue 1236. Compared 180432 event pairs, 6735 based on Foata normal form. 480/25760 useless extension candidates. Maximal degree in co-relation 86437. Up to 16663 conditions per place. [2021-11-19 04:26:38,564 INFO L132 encePairwiseOnDemand]: 127/137 looper letters, 132 selfloop transitions, 21 changer transitions 2/217 dead transitions. [2021-11-19 04:26:38,565 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 217 transitions, 1449 flow [2021-11-19 04:26:38,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:26:38,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-19 04:26:38,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 649 transitions. [2021-11-19 04:26:38,569 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6767466110531803 [2021-11-19 04:26:38,569 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 649 transitions. [2021-11-19 04:26:38,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 649 transitions. [2021-11-19 04:26:38,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 04:26:38,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 649 transitions. [2021-11-19 04:26:38,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 92.71428571428571) internal successors, (649), 7 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:38,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:38,578 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:38,578 INFO L186 Difference]: Start difference. First operand has 166 places, 156 transitions, 776 flow. Second operand 7 states and 649 transitions. [2021-11-19 04:26:38,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 217 transitions, 1449 flow [2021-11-19 04:26:38,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 217 transitions, 1416 flow, removed 5 selfloop flow, removed 5 redundant places. [2021-11-19 04:26:38,943 INFO L242 Difference]: Finished difference. Result has 169 places, 157 transitions, 818 flow [2021-11-19 04:26:38,944 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=743, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=818, PETRI_PLACES=169, PETRI_TRANSITIONS=157} [2021-11-19 04:26:38,945 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 46 predicate places. [2021-11-19 04:26:38,945 INFO L470 AbstractCegarLoop]: Abstraction has has 169 places, 157 transitions, 818 flow [2021-11-19 04:26:38,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.0) internal successors, (581), 7 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:38,946 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 04:26:38,946 INFO L254 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] [2021-11-19 04:26:38,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-19 04:26:38,947 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-19 04:26:38,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:26:38,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1594081778, now seen corresponding path program 1 times [2021-11-19 04:26:38,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:26:38,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398343439] [2021-11-19 04:26:38,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:26:38,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:26:38,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:26:39,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:26:39,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:26:39,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398343439] [2021-11-19 04:26:39,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398343439] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:26:39,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:26:39,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 04:26:39,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477022852] [2021-11-19 04:26:39,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:26:39,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 04:26:39,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:26:39,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 04:26:39,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:26:39,239 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 137 [2021-11-19 04:26:39,240 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 157 transitions, 818 flow. Second operand has 7 states, 7 states have (on average 83.0) internal successors, (581), 7 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:39,240 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 04:26:39,241 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 137 [2021-11-19 04:26:39,241 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 04:26:44,204 INFO L129 PetriNetUnfolder]: 18218/27859 cut-off events. [2021-11-19 04:26:44,207 INFO L130 PetriNetUnfolder]: For 81590/81609 co-relation queries the response was YES. [2021-11-19 04:26:44,391 INFO L84 FinitePrefix]: Finished finitePrefix Result has 99827 conditions, 27859 events. 18218/27859 cut-off events. For 81590/81609 co-relation queries the response was YES. Maximal size of possible extension queue 1247. Compared 196715 event pairs, 9383 based on Foata normal form. 486/28057 useless extension candidates. Maximal degree in co-relation 99799. Up to 19090 conditions per place. [2021-11-19 04:26:44,560 INFO L132 encePairwiseOnDemand]: 127/137 looper letters, 134 selfloop transitions, 21 changer transitions 2/219 dead transitions. [2021-11-19 04:26:44,560 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 219 transitions, 1535 flow [2021-11-19 04:26:44,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:26:44,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-19 04:26:44,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 649 transitions. [2021-11-19 04:26:44,564 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6767466110531803 [2021-11-19 04:26:44,565 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 649 transitions. [2021-11-19 04:26:44,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 649 transitions. [2021-11-19 04:26:44,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 04:26:44,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 649 transitions. [2021-11-19 04:26:44,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 92.71428571428571) internal successors, (649), 7 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:44,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:44,573 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:44,573 INFO L186 Difference]: Start difference. First operand has 169 places, 157 transitions, 818 flow. Second operand 7 states and 649 transitions. [2021-11-19 04:26:44,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 219 transitions, 1535 flow [2021-11-19 04:26:44,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 219 transitions, 1510 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-11-19 04:26:44,895 INFO L242 Difference]: Finished difference. Result has 173 places, 158 transitions, 872 flow [2021-11-19 04:26:44,896 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=797, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=872, PETRI_PLACES=173, PETRI_TRANSITIONS=158} [2021-11-19 04:26:44,897 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 50 predicate places. [2021-11-19 04:26:44,897 INFO L470 AbstractCegarLoop]: Abstraction has has 173 places, 158 transitions, 872 flow [2021-11-19 04:26:44,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.0) internal successors, (581), 7 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:44,897 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 04:26:44,898 INFO L254 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, 1, 1] [2021-11-19 04:26:44,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-19 04:26:44,898 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-19 04:26:44,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:26:44,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1312455867, now seen corresponding path program 1 times [2021-11-19 04:26:44,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:26:44,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067797581] [2021-11-19 04:26:44,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:26:44,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:26:44,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:26:51,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:26:51,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:26:51,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067797581] [2021-11-19 04:26:51,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067797581] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:26:51,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860287022] [2021-11-19 04:26:51,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:26:51,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:26:51,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e0794d-0e17-4f9d-932e-72c0468cbb25/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:26:51,893 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e0794d-0e17-4f9d-932e-72c0468cbb25/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:26:51,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e0794d-0e17-4f9d-932e-72c0468cbb25/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 04:26:54,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:26:54,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-19 04:26:54,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:29:28,554 WARN L227 SmtUtils]: Spent 5.89s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)