./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-lit/gj2007.c.i.p+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-lit/gj2007.c.i.p+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3 --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 e4be225ddf5726de15d96df20c7b0d434801c413 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 19:39:14,149 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:39:14,152 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:39:14,206 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:39:14,206 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:39:14,208 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:39:14,210 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:39:14,212 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:39:14,215 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:39:14,216 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:39:14,217 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:39:14,219 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:39:14,219 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:39:14,221 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:39:14,222 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:39:14,224 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:39:14,225 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:39:14,226 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:39:14,229 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:39:14,231 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:39:14,233 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:39:14,235 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:39:14,236 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:39:14,237 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:39:14,241 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:39:14,242 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:39:14,242 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:39:14,243 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:39:14,244 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:39:14,245 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:39:14,246 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:39:14,247 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:39:14,248 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:39:14,249 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:39:14,250 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:39:14,250 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:39:14,251 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:39:14,252 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:39:14,252 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:39:14,254 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:39:14,255 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:39:14,257 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:39:14,300 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:39:14,303 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:39:14,304 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:39:14,304 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:39:14,311 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:39:14,312 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:39:14,312 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:39:14,313 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:39:14,313 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:39:14,313 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:39:14,314 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:39:14,315 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:39:14,315 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:39:14,315 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:39:14,315 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:39:14,316 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:39:14,316 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:39:14,316 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:39:14,316 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:39:14,317 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:39:14,317 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:39:14,317 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:39:14,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:39:14,318 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:39:14,318 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:39:14,318 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:39:14,319 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:39:14,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:39:14,319 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:39:14,321 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:39:14,321 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:39:14,321 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:39:14,322 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_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4be225ddf5726de15d96df20c7b0d434801c413 [2021-10-15 19:39:14,603 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:39:14,628 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:39:14,632 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:39:14,633 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:39:14,634 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:39:14,635 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/loop-lit/gj2007.c.i.p+lhb-reducer.c [2021-10-15 19:39:14,711 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/data/79e3b2336/ca23d47c076844b8aa1182519acf5d21/FLAGad1a1fb1e [2021-10-15 19:39:15,196 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:39:15,197 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/sv-benchmarks/c/loop-lit/gj2007.c.i.p+lhb-reducer.c [2021-10-15 19:39:15,204 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/data/79e3b2336/ca23d47c076844b8aa1182519acf5d21/FLAGad1a1fb1e [2021-10-15 19:39:15,580 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/data/79e3b2336/ca23d47c076844b8aa1182519acf5d21 [2021-10-15 19:39:15,586 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:39:15,588 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:39:15,593 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:39:15,593 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:39:15,597 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:39:15,598 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:39:15" (1/1) ... [2021-10-15 19:39:15,600 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10b5bed1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:39:15, skipping insertion in model container [2021-10-15 19:39:15,601 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:39:15" (1/1) ... [2021-10-15 19:39:15,608 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:39:15,642 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:39:15,825 WARN L228 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_90bc31d8-3e6d-4631-a71f-ba252c197a97/sv-benchmarks/c/loop-lit/gj2007.c.i.p+lhb-reducer.c[1613,1626] [2021-10-15 19:39:15,837 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:39:15,846 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:39:15,866 WARN L228 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_90bc31d8-3e6d-4631-a71f-ba252c197a97/sv-benchmarks/c/loop-lit/gj2007.c.i.p+lhb-reducer.c[1613,1626] [2021-10-15 19:39:15,872 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:39:15,886 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:39:15,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:39:15 WrapperNode [2021-10-15 19:39:15,887 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:39:15,888 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:39:15,888 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:39:15,888 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:39:15,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:39:15" (1/1) ... [2021-10-15 19:39:15,904 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:39:15" (1/1) ... [2021-10-15 19:39:15,924 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:39:15,925 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:39:15,925 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:39:15,925 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:39:15,934 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:39:15" (1/1) ... [2021-10-15 19:39:15,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:39:15" (1/1) ... [2021-10-15 19:39:15,936 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:39:15" (1/1) ... [2021-10-15 19:39:15,936 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:39:15" (1/1) ... [2021-10-15 19:39:15,940 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:39:15" (1/1) ... [2021-10-15 19:39:15,943 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:39:15" (1/1) ... [2021-10-15 19:39:15,944 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:39:15" (1/1) ... [2021-10-15 19:39:15,946 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:39:15,947 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:39:15,948 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:39:15,948 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:39:15,949 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:39:15" (1/1) ... [2021-10-15 19:39:15,961 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:39:15,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:16,000 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:39:16,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:39:16,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:39:16,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:39:16,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:39:16,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:39:16,332 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:39:16,352 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-15 19:39:16,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:39:16 BoogieIcfgContainer [2021-10-15 19:39:16,354 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:39:16,356 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:39:16,356 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:39:16,360 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:39:16,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:39:15" (1/3) ... [2021-10-15 19:39:16,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43033e9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:39:16, skipping insertion in model container [2021-10-15 19:39:16,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:39:15" (2/3) ... [2021-10-15 19:39:16,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43033e9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:39:16, skipping insertion in model container [2021-10-15 19:39:16,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:39:16" (3/3) ... [2021-10-15 19:39:16,363 INFO L111 eAbstractionObserver]: Analyzing ICFG gj2007.c.i.p+lhb-reducer.c [2021-10-15 19:39:16,376 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:39:16,377 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:39:16,462 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:39:16,470 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, mConcurrency=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 [2021-10-15 19:39:16,475 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:39:16,489 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 28 places, 48 transitions, 96 flow [2021-10-15 19:39:16,521 INFO L129 PetriNetUnfolder]: 21/48 cut-off events. [2021-10-15 19:39:16,522 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:39:16,524 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 48 events. 21/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 29 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2021-10-15 19:39:16,524 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 48 transitions, 96 flow [2021-10-15 19:39:16,531 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 35 transitions, 70 flow [2021-10-15 19:39:16,538 INFO L129 PetriNetUnfolder]: 11/34 cut-off events. [2021-10-15 19:39:16,539 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:39:16,539 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:16,539 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] [2021-10-15 19:39:16,540 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:16,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:16,545 INFO L82 PathProgramCache]: Analyzing trace with hash 635511084, now seen corresponding path program 1 times [2021-10-15 19:39:16,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:16,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13423209] [2021-10-15 19:39:16,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:16,559 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:16,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:16,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:39:16,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:16,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13423209] [2021-10-15 19:39:16,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13423209] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:39:16,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:39:16,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 19:39:16,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299185986] [2021-10-15 19:39:16,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:39:16,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:16,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:39:16,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:39:16,841 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:39:16,844 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 35 transitions, 70 flow. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:16,845 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:16,845 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:39:16,846 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:17,016 INFO L129 PetriNetUnfolder]: 7/31 cut-off events. [2021-10-15 19:39:17,016 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:39:17,016 INFO L84 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 31 events. 7/31 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 8 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 0. Up to 21 conditions per place. [2021-10-15 19:39:17,018 INFO L132 encePairwiseOnDemand]: 39/48 looper letters, 23 selfloop transitions, 5 changer transitions 0/31 dead transitions. [2021-10-15 19:39:17,018 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 31 transitions, 118 flow [2021-10-15 19:39:17,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:39:17,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:39:17,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 68 transitions. [2021-10-15 19:39:17,031 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.2361111111111111 [2021-10-15 19:39:17,031 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 68 transitions. [2021-10-15 19:39:17,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 68 transitions. [2021-10-15 19:39:17,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:17,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 68 transitions. [2021-10-15 19:39:17,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:17,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 48.0) internal successors, (336), 7 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:17,045 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 48.0) internal successors, (336), 7 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:17,047 INFO L186 Difference]: Start difference. First operand has 25 places, 35 transitions, 70 flow. Second operand 6 states and 68 transitions. [2021-10-15 19:39:17,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 31 transitions, 118 flow [2021-10-15 19:39:17,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 31 transitions, 118 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:39:17,053 INFO L242 Difference]: Finished difference. Result has 30 places, 31 transitions, 72 flow [2021-10-15 19:39:17,055 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=72, PETRI_PLACES=30, PETRI_TRANSITIONS=31} [2021-10-15 19:39:17,056 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 5 predicate places. [2021-10-15 19:39:17,056 INFO L470 AbstractCegarLoop]: Abstraction has has 30 places, 31 transitions, 72 flow [2021-10-15 19:39:17,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:17,057 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:17,057 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] [2021-10-15 19:39:17,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:39:17,058 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:17,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:17,059 INFO L82 PathProgramCache]: Analyzing trace with hash 403260920, now seen corresponding path program 1 times [2021-10-15 19:39:17,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:17,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297983098] [2021-10-15 19:39:17,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:17,060 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:17,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:17,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:39:17,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:17,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297983098] [2021-10-15 19:39:17,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297983098] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:39:17,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:39:17,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-15 19:39:17,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011937827] [2021-10-15 19:39:17,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:39:17,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:17,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:39:17,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:39:17,158 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:39:17,158 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 31 transitions, 72 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:17,158 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:17,159 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:39:17,159 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:17,265 INFO L129 PetriNetUnfolder]: 6/30 cut-off events. [2021-10-15 19:39:17,266 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-10-15 19:39:17,268 INFO L84 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 30 events. 6/30 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 7 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 38. Up to 18 conditions per place. [2021-10-15 19:39:17,270 INFO L132 encePairwiseOnDemand]: 41/48 looper letters, 21 selfloop transitions, 6 changer transitions 0/30 dead transitions. [2021-10-15 19:39:17,270 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 30 transitions, 124 flow [2021-10-15 19:39:17,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:39:17,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 19:39:17,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 70 transitions. [2021-10-15 19:39:17,275 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.20833333333333334 [2021-10-15 19:39:17,275 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 70 transitions. [2021-10-15 19:39:17,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 70 transitions. [2021-10-15 19:39:17,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:17,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 70 transitions. [2021-10-15 19:39:17,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:17,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 48.0) internal successors, (384), 8 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:17,286 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 48.0) internal successors, (384), 8 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:17,287 INFO L186 Difference]: Start difference. First operand has 30 places, 31 transitions, 72 flow. Second operand 7 states and 70 transitions. [2021-10-15 19:39:17,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 30 transitions, 124 flow [2021-10-15 19:39:17,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 30 transitions, 114 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-10-15 19:39:17,290 INFO L242 Difference]: Finished difference. Result has 31 places, 30 transitions, 72 flow [2021-10-15 19:39:17,290 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=72, PETRI_PLACES=31, PETRI_TRANSITIONS=30} [2021-10-15 19:39:17,291 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 6 predicate places. [2021-10-15 19:39:17,291 INFO L470 AbstractCegarLoop]: Abstraction has has 31 places, 30 transitions, 72 flow [2021-10-15 19:39:17,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:17,292 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:17,292 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] [2021-10-15 19:39:17,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:39:17,292 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:17,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:17,293 INFO L82 PathProgramCache]: Analyzing trace with hash 602818777, now seen corresponding path program 1 times [2021-10-15 19:39:17,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:17,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591427783] [2021-10-15 19:39:17,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:17,294 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:17,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:17,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:39:17,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:17,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591427783] [2021-10-15 19:39:17,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591427783] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:39:17,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:39:17,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-15 19:39:17,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220477553] [2021-10-15 19:39:17,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:39:17,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:17,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:39:17,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:39:17,404 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:39:17,404 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 30 transitions, 72 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:17,404 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:17,404 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:39:17,405 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:17,470 INFO L129 PetriNetUnfolder]: 5/29 cut-off events. [2021-10-15 19:39:17,470 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-10-15 19:39:17,471 INFO L84 FinitePrefix]: Finished finitePrefix Result has 64 conditions, 29 events. 5/29 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 6 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 32. Up to 15 conditions per place. [2021-10-15 19:39:17,471 INFO L132 encePairwiseOnDemand]: 40/48 looper letters, 19 selfloop transitions, 7 changer transitions 0/29 dead transitions. [2021-10-15 19:39:17,471 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 29 transitions, 122 flow [2021-10-15 19:39:17,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 19:39:17,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-15 19:39:17,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 75 transitions. [2021-10-15 19:39:17,475 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.1953125 [2021-10-15 19:39:17,475 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 75 transitions. [2021-10-15 19:39:17,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 75 transitions. [2021-10-15 19:39:17,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:17,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 75 transitions. [2021-10-15 19:39:17,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:17,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 48.0) internal successors, (432), 9 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:17,479 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 48.0) internal successors, (432), 9 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:17,479 INFO L186 Difference]: Start difference. First operand has 31 places, 30 transitions, 72 flow. Second operand 8 states and 75 transitions. [2021-10-15 19:39:17,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 29 transitions, 122 flow [2021-10-15 19:39:17,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 29 transitions, 110 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-10-15 19:39:17,481 INFO L242 Difference]: Finished difference. Result has 32 places, 29 transitions, 72 flow [2021-10-15 19:39:17,482 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=72, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2021-10-15 19:39:17,482 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 7 predicate places. [2021-10-15 19:39:17,482 INFO L470 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 72 flow [2021-10-15 19:39:17,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:17,483 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:17,483 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] [2021-10-15 19:39:17,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 19:39:17,483 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:17,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:17,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1670353841, now seen corresponding path program 1 times [2021-10-15 19:39:17,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:17,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405349180] [2021-10-15 19:39:17,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:17,485 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:17,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:17,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:39:17,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:17,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405349180] [2021-10-15 19:39:17,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405349180] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:39:17,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:39:17,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-15 19:39:17,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450269268] [2021-10-15 19:39:17,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 19:39:17,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:17,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 19:39:17,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-15 19:39:17,582 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:39:17,583 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 72 flow. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 9 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:17,583 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:17,583 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:39:17,583 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:17,674 INFO L129 PetriNetUnfolder]: 4/28 cut-off events. [2021-10-15 19:39:17,675 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-10-15 19:39:17,675 INFO L84 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 28 events. 4/28 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 5 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 26. Up to 12 conditions per place. [2021-10-15 19:39:17,675 INFO L132 encePairwiseOnDemand]: 39/48 looper letters, 17 selfloop transitions, 8 changer transitions 0/28 dead transitions. [2021-10-15 19:39:17,675 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 28 transitions, 120 flow [2021-10-15 19:39:17,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 19:39:17,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-15 19:39:17,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 80 transitions. [2021-10-15 19:39:17,680 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.18518518518518517 [2021-10-15 19:39:17,681 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 80 transitions. [2021-10-15 19:39:17,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 80 transitions. [2021-10-15 19:39:17,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:17,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 80 transitions. [2021-10-15 19:39:17,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:17,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 48.0) internal successors, (480), 10 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:17,688 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 48.0) internal successors, (480), 10 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:17,689 INFO L186 Difference]: Start difference. First operand has 32 places, 29 transitions, 72 flow. Second operand 9 states and 80 transitions. [2021-10-15 19:39:17,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 28 transitions, 120 flow [2021-10-15 19:39:17,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 28 transitions, 106 flow, removed 0 selfloop flow, removed 7 redundant places. [2021-10-15 19:39:17,692 INFO L242 Difference]: Finished difference. Result has 33 places, 28 transitions, 72 flow [2021-10-15 19:39:17,692 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=72, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2021-10-15 19:39:17,692 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 8 predicate places. [2021-10-15 19:39:17,692 INFO L470 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 72 flow [2021-10-15 19:39:17,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 9 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:17,693 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:17,693 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] [2021-10-15 19:39:17,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 19:39:17,694 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:17,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:17,694 INFO L82 PathProgramCache]: Analyzing trace with hash 698213082, now seen corresponding path program 1 times [2021-10-15 19:39:17,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:17,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619350535] [2021-10-15 19:39:17,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:17,695 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:17,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:17,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:39:17,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:17,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619350535] [2021-10-15 19:39:17,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619350535] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:39:17,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:39:17,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-15 19:39:17,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814111298] [2021-10-15 19:39:17,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-15 19:39:17,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:17,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-15 19:39:17,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-10-15 19:39:17,829 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:39:17,834 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 72 flow. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:17,834 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:17,834 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:39:17,834 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:17,909 INFO L129 PetriNetUnfolder]: 3/27 cut-off events. [2021-10-15 19:39:17,909 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-10-15 19:39:17,910 INFO L84 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 27 events. 3/27 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 4 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 20. Up to 9 conditions per place. [2021-10-15 19:39:17,912 INFO L132 encePairwiseOnDemand]: 38/48 looper letters, 15 selfloop transitions, 9 changer transitions 0/27 dead transitions. [2021-10-15 19:39:17,913 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 27 transitions, 118 flow [2021-10-15 19:39:17,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-15 19:39:17,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-15 19:39:17,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 85 transitions. [2021-10-15 19:39:17,915 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.17708333333333334 [2021-10-15 19:39:17,915 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 85 transitions. [2021-10-15 19:39:17,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 85 transitions. [2021-10-15 19:39:17,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:17,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 85 transitions. [2021-10-15 19:39:17,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:17,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 48.0) internal successors, (528), 11 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:17,918 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 48.0) internal successors, (528), 11 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:17,918 INFO L186 Difference]: Start difference. First operand has 33 places, 28 transitions, 72 flow. Second operand 10 states and 85 transitions. [2021-10-15 19:39:17,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 27 transitions, 118 flow [2021-10-15 19:39:17,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 27 transitions, 102 flow, removed 0 selfloop flow, removed 8 redundant places. [2021-10-15 19:39:17,924 INFO L242 Difference]: Finished difference. Result has 34 places, 27 transitions, 72 flow [2021-10-15 19:39:17,924 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=72, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2021-10-15 19:39:17,924 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 9 predicate places. [2021-10-15 19:39:17,924 INFO L470 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 72 flow [2021-10-15 19:39:17,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:17,925 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:17,925 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] [2021-10-15 19:39:17,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 19:39:17,925 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:17,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:17,926 INFO L82 PathProgramCache]: Analyzing trace with hash -217919750, now seen corresponding path program 1 times [2021-10-15 19:39:17,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:17,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34235956] [2021-10-15 19:39:17,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:17,927 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:17,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:18,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:39:18,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:18,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34235956] [2021-10-15 19:39:18,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34235956] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:39:18,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:39:18,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-15 19:39:18,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592021155] [2021-10-15 19:39:18,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-15 19:39:18,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:18,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-15 19:39:18,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-10-15 19:39:18,107 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:39:18,108 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 72 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:18,108 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:18,108 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:39:18,108 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:18,175 INFO L129 PetriNetUnfolder]: 2/26 cut-off events. [2021-10-15 19:39:18,175 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-10-15 19:39:18,176 INFO L84 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 26 events. 2/26 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 3 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 14. Up to 6 conditions per place. [2021-10-15 19:39:18,176 INFO L132 encePairwiseOnDemand]: 37/48 looper letters, 13 selfloop transitions, 10 changer transitions 0/26 dead transitions. [2021-10-15 19:39:18,177 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 26 transitions, 116 flow [2021-10-15 19:39:18,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-15 19:39:18,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-15 19:39:18,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 90 transitions. [2021-10-15 19:39:18,180 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.17045454545454544 [2021-10-15 19:39:18,180 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 90 transitions. [2021-10-15 19:39:18,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 90 transitions. [2021-10-15 19:39:18,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:18,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 90 transitions. [2021-10-15 19:39:18,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 8.181818181818182) internal successors, (90), 11 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:18,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 48.0) internal successors, (576), 12 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:18,186 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 48.0) internal successors, (576), 12 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:18,186 INFO L186 Difference]: Start difference. First operand has 34 places, 27 transitions, 72 flow. Second operand 11 states and 90 transitions. [2021-10-15 19:39:18,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 26 transitions, 116 flow [2021-10-15 19:39:18,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 26 transitions, 98 flow, removed 0 selfloop flow, removed 9 redundant places. [2021-10-15 19:39:18,188 INFO L242 Difference]: Finished difference. Result has 35 places, 26 transitions, 72 flow [2021-10-15 19:39:18,188 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=72, PETRI_PLACES=35, PETRI_TRANSITIONS=26} [2021-10-15 19:39:18,188 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 10 predicate places. [2021-10-15 19:39:18,188 INFO L470 AbstractCegarLoop]: Abstraction has has 35 places, 26 transitions, 72 flow [2021-10-15 19:39:18,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:18,189 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:18,189 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] [2021-10-15 19:39:18,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 19:39:18,189 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:18,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:18,190 INFO L82 PathProgramCache]: Analyzing trace with hash -218545361, now seen corresponding path program 1 times [2021-10-15 19:39:18,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:18,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807165862] [2021-10-15 19:39:18,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:18,191 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:18,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:18,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:39:18,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:18,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807165862] [2021-10-15 19:39:18,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807165862] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:39:18,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:39:18,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:39:18,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882239371] [2021-10-15 19:39:18,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:39:18,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:18,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:39:18,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:39:18,256 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:39:18,256 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:18,256 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:18,256 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:39:18,256 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:18,304 INFO L129 PetriNetUnfolder]: 3/29 cut-off events. [2021-10-15 19:39:18,304 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-10-15 19:39:18,304 INFO L84 FinitePrefix]: Finished finitePrefix Result has 68 conditions, 29 events. 3/29 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 4 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 16. Up to 22 conditions per place. [2021-10-15 19:39:18,304 INFO L132 encePairwiseOnDemand]: 44/48 looper letters, 23 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2021-10-15 19:39:18,304 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 29 transitions, 130 flow [2021-10-15 19:39:18,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:39:18,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:39:18,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 45 transitions. [2021-10-15 19:39:18,308 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3125 [2021-10-15 19:39:18,308 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 45 transitions. [2021-10-15 19:39:18,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 45 transitions. [2021-10-15 19:39:18,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:18,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 45 transitions. [2021-10-15 19:39:18,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:18,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:18,310 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:18,310 INFO L186 Difference]: Start difference. First operand has 35 places, 26 transitions, 72 flow. Second operand 3 states and 45 transitions. [2021-10-15 19:39:18,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 29 transitions, 130 flow [2021-10-15 19:39:18,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 29 transitions, 110 flow, removed 0 selfloop flow, removed 10 redundant places. [2021-10-15 19:39:18,314 INFO L242 Difference]: Finished difference. Result has 29 places, 28 transitions, 74 flow [2021-10-15 19:39:18,314 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=29, PETRI_TRANSITIONS=28} [2021-10-15 19:39:18,315 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 4 predicate places. [2021-10-15 19:39:18,316 INFO L470 AbstractCegarLoop]: Abstraction has has 29 places, 28 transitions, 74 flow [2021-10-15 19:39:18,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:18,316 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:18,316 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] [2021-10-15 19:39:18,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-15 19:39:18,317 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:18,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:18,317 INFO L82 PathProgramCache]: Analyzing trace with hash 423767145, now seen corresponding path program 1 times [2021-10-15 19:39:18,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:18,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175662806] [2021-10-15 19:39:18,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:18,318 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:18,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:18,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:39:18,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:18,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175662806] [2021-10-15 19:39:18,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175662806] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:39:18,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:39:18,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-15 19:39:18,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112476083] [2021-10-15 19:39:18,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-15 19:39:18,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:18,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-15 19:39:18,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-10-15 19:39:18,485 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:39:18,486 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 74 flow. Second operand has 12 states, 12 states have (on average 7.833333333333333) internal successors, (94), 12 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:18,486 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:18,486 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:39:18,486 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:18,559 INFO L129 PetriNetUnfolder]: 3/31 cut-off events. [2021-10-15 19:39:18,559 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-10-15 19:39:18,559 INFO L84 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 31 events. 3/31 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 4 event pairs, 0 based on Foata normal form. 1/32 useless extension candidates. Maximal degree in co-relation 46. Up to 9 conditions per place. [2021-10-15 19:39:18,560 INFO L132 encePairwiseOnDemand]: 36/48 looper letters, 16 selfloop transitions, 11 changer transitions 0/30 dead transitions. [2021-10-15 19:39:18,560 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 30 transitions, 134 flow [2021-10-15 19:39:18,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-15 19:39:18,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-15 19:39:18,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 98 transitions. [2021-10-15 19:39:18,562 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.1701388888888889 [2021-10-15 19:39:18,563 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 98 transitions. [2021-10-15 19:39:18,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 98 transitions. [2021-10-15 19:39:18,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:18,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 98 transitions. [2021-10-15 19:39:18,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 8.166666666666666) internal successors, (98), 12 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:18,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 48.0) internal successors, (624), 13 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:18,565 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 48.0) internal successors, (624), 13 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:18,566 INFO L186 Difference]: Start difference. First operand has 29 places, 28 transitions, 74 flow. Second operand 12 states and 98 transitions. [2021-10-15 19:39:18,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 30 transitions, 134 flow [2021-10-15 19:39:18,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 30 transitions, 128 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:39:18,573 INFO L242 Difference]: Finished difference. Result has 39 places, 29 transitions, 100 flow [2021-10-15 19:39:18,574 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=100, PETRI_PLACES=39, PETRI_TRANSITIONS=29} [2021-10-15 19:39:18,574 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 14 predicate places. [2021-10-15 19:39:18,574 INFO L470 AbstractCegarLoop]: Abstraction has has 39 places, 29 transitions, 100 flow [2021-10-15 19:39:18,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.833333333333333) internal successors, (94), 12 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:18,575 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:18,575 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:18,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-15 19:39:18,575 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:18,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:18,576 INFO L82 PathProgramCache]: Analyzing trace with hash -875092666, now seen corresponding path program 1 times [2021-10-15 19:39:18,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:18,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886110187] [2021-10-15 19:39:18,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:18,577 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:18,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:18,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:39:18,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:18,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886110187] [2021-10-15 19:39:18,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886110187] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:18,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719836291] [2021-10-15 19:39:18,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:18,749 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:18,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:18,755 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:18,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:39:18,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:18,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-15 19:39:18,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:19,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:39:19,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719836291] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:19,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:39:19,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-10-15 19:39:19,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978638373] [2021-10-15 19:39:19,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-15 19:39:19,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:19,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-15 19:39:19,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-10-15 19:39:19,080 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:39:19,080 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 29 transitions, 100 flow. Second operand has 14 states, 14 states have (on average 7.928571428571429) internal successors, (111), 14 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:19,080 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:19,080 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:39:19,080 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:19,163 INFO L129 PetriNetUnfolder]: 3/33 cut-off events. [2021-10-15 19:39:19,163 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-10-15 19:39:19,164 INFO L84 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 33 events. 3/33 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 4 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 29. Up to 9 conditions per place. [2021-10-15 19:39:19,164 INFO L132 encePairwiseOnDemand]: 36/48 looper letters, 17 selfloop transitions, 12 changer transitions 0/32 dead transitions. [2021-10-15 19:39:19,164 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 32 transitions, 168 flow [2021-10-15 19:39:19,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-15 19:39:19,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-15 19:39:19,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 106 transitions. [2021-10-15 19:39:19,166 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.16987179487179488 [2021-10-15 19:39:19,166 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 106 transitions. [2021-10-15 19:39:19,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 106 transitions. [2021-10-15 19:39:19,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:19,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 106 transitions. [2021-10-15 19:39:19,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 8.153846153846153) internal successors, (106), 13 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:19,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 48.0) internal successors, (672), 14 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:19,169 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 48.0) internal successors, (672), 14 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:19,169 INFO L186 Difference]: Start difference. First operand has 39 places, 29 transitions, 100 flow. Second operand 13 states and 106 transitions. [2021-10-15 19:39:19,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 32 transitions, 168 flow [2021-10-15 19:39:19,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 32 transitions, 146 flow, removed 1 selfloop flow, removed 10 redundant places. [2021-10-15 19:39:19,174 INFO L242 Difference]: Finished difference. Result has 42 places, 30 transitions, 114 flow [2021-10-15 19:39:19,174 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=114, PETRI_PLACES=42, PETRI_TRANSITIONS=30} [2021-10-15 19:39:19,174 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 17 predicate places. [2021-10-15 19:39:19,175 INFO L470 AbstractCegarLoop]: Abstraction has has 42 places, 30 transitions, 114 flow [2021-10-15 19:39:19,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.928571428571429) internal successors, (111), 14 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:19,175 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:19,175 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:19,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:19,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:19,399 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:19,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:19,400 INFO L82 PathProgramCache]: Analyzing trace with hash 756112099, now seen corresponding path program 2 times [2021-10-15 19:39:19,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:19,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856106166] [2021-10-15 19:39:19,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:19,400 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:19,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:19,529 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:39:19,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:19,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856106166] [2021-10-15 19:39:19,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856106166] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:19,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792026317] [2021-10-15 19:39:19,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:39:19,537 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:19,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:19,538 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:19,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:39:19,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:39:19,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:39:19,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-15 19:39:19,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:19,767 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:39:19,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792026317] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:19,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:39:19,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-10-15 19:39:19,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040933080] [2021-10-15 19:39:19,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-15 19:39:19,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:19,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-15 19:39:19,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-10-15 19:39:19,779 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:39:19,779 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 30 transitions, 114 flow. Second operand has 15 states, 15 states have (on average 7.933333333333334) internal successors, (119), 15 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:19,779 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:19,779 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:39:19,780 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:19,858 INFO L129 PetriNetUnfolder]: 3/35 cut-off events. [2021-10-15 19:39:19,859 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2021-10-15 19:39:19,859 INFO L84 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 35 events. 3/35 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 4 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 32. Up to 9 conditions per place. [2021-10-15 19:39:19,859 INFO L132 encePairwiseOnDemand]: 36/48 looper letters, 18 selfloop transitions, 13 changer transitions 0/34 dead transitions. [2021-10-15 19:39:19,859 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 34 transitions, 190 flow [2021-10-15 19:39:19,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-15 19:39:19,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-15 19:39:19,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 114 transitions. [2021-10-15 19:39:19,861 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.16964285714285715 [2021-10-15 19:39:19,861 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 114 transitions. [2021-10-15 19:39:19,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 114 transitions. [2021-10-15 19:39:19,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:19,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 114 transitions. [2021-10-15 19:39:19,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 8.142857142857142) internal successors, (114), 14 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:19,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 48.0) internal successors, (720), 15 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:19,865 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 48.0) internal successors, (720), 15 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:19,865 INFO L186 Difference]: Start difference. First operand has 42 places, 30 transitions, 114 flow. Second operand 14 states and 114 transitions. [2021-10-15 19:39:19,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 34 transitions, 190 flow [2021-10-15 19:39:19,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 34 transitions, 164 flow, removed 2 selfloop flow, removed 11 redundant places. [2021-10-15 19:39:19,868 INFO L242 Difference]: Finished difference. Result has 45 places, 31 transitions, 128 flow [2021-10-15 19:39:19,868 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=128, PETRI_PLACES=45, PETRI_TRANSITIONS=31} [2021-10-15 19:39:19,868 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 20 predicate places. [2021-10-15 19:39:19,868 INFO L470 AbstractCegarLoop]: Abstraction has has 45 places, 31 transitions, 128 flow [2021-10-15 19:39:19,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.933333333333334) internal successors, (119), 15 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:19,869 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:19,869 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:19,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:20,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-15 19:39:20,083 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:20,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:20,083 INFO L82 PathProgramCache]: Analyzing trace with hash 680828224, now seen corresponding path program 3 times [2021-10-15 19:39:20,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:20,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383455375] [2021-10-15 19:39:20,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:20,084 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:20,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:20,226 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:39:20,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:20,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383455375] [2021-10-15 19:39:20,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383455375] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:20,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943056399] [2021-10-15 19:39:20,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:39:20,227 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:20,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:20,228 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:20,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 19:39:20,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-15 19:39:20,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:39:20,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-15 19:39:20,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:20,410 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-15 19:39:20,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943056399] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:20,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:39:20,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 4] total 17 [2021-10-15 19:39:20,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911727903] [2021-10-15 19:39:20,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-15 19:39:20,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:20,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-15 19:39:20,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-10-15 19:39:20,413 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:39:20,413 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 31 transitions, 128 flow. Second operand has 17 states, 17 states have (on average 9.117647058823529) internal successors, (155), 17 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:20,413 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:20,414 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:39:20,414 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:20,494 INFO L129 PetriNetUnfolder]: 4/40 cut-off events. [2021-10-15 19:39:20,495 INFO L130 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2021-10-15 19:39:20,495 INFO L84 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 40 events. 4/40 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 5 event pairs, 0 based on Foata normal form. 1/38 useless extension candidates. Maximal degree in co-relation 43. Up to 11 conditions per place. [2021-10-15 19:39:20,495 INFO L132 encePairwiseOnDemand]: 35/48 looper letters, 19 selfloop transitions, 18 changer transitions 0/40 dead transitions. [2021-10-15 19:39:20,495 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 40 transitions, 232 flow [2021-10-15 19:39:20,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-15 19:39:20,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-10-15 19:39:20,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 141 transitions. [2021-10-15 19:39:20,497 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.17279411764705882 [2021-10-15 19:39:20,497 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 141 transitions. [2021-10-15 19:39:20,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 141 transitions. [2021-10-15 19:39:20,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:20,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 141 transitions. [2021-10-15 19:39:20,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 8.294117647058824) internal successors, (141), 17 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:20,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 48.0) internal successors, (864), 18 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:20,501 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 48.0) internal successors, (864), 18 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:20,501 INFO L186 Difference]: Start difference. First operand has 45 places, 31 transitions, 128 flow. Second operand 17 states and 141 transitions. [2021-10-15 19:39:20,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 40 transitions, 232 flow [2021-10-15 19:39:20,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 40 transitions, 202 flow, removed 3 selfloop flow, removed 12 redundant places. [2021-10-15 19:39:20,505 INFO L242 Difference]: Finished difference. Result has 51 places, 34 transitions, 163 flow [2021-10-15 19:39:20,505 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=163, PETRI_PLACES=51, PETRI_TRANSITIONS=34} [2021-10-15 19:39:20,505 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 26 predicate places. [2021-10-15 19:39:20,505 INFO L470 AbstractCegarLoop]: Abstraction has has 51 places, 34 transitions, 163 flow [2021-10-15 19:39:20,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 9.117647058823529) internal successors, (155), 17 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:20,506 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:20,506 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:20,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:20,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:20,731 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:20,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:20,731 INFO L82 PathProgramCache]: Analyzing trace with hash 2124419607, now seen corresponding path program 4 times [2021-10-15 19:39:20,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:20,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295200634] [2021-10-15 19:39:20,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:20,732 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:20,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:20,901 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 19:39:20,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:20,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295200634] [2021-10-15 19:39:20,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295200634] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:20,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5771081] [2021-10-15 19:39:20,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 19:39:20,907 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:20,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:20,913 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:20,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 19:39:20,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 19:39:20,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:39:20,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-15 19:39:20,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:21,129 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 19:39:21,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5771081] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:21,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:39:21,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-10-15 19:39:21,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271677003] [2021-10-15 19:39:21,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-15 19:39:21,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:21,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-15 19:39:21,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-10-15 19:39:21,136 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:39:21,136 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 34 transitions, 163 flow. Second operand has 17 states, 17 states have (on average 8.058823529411764) internal successors, (137), 17 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:21,136 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:21,137 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:39:21,137 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:21,211 INFO L129 PetriNetUnfolder]: 4/42 cut-off events. [2021-10-15 19:39:21,211 INFO L130 PetriNetUnfolder]: For 76/76 co-relation queries the response was YES. [2021-10-15 19:39:21,212 INFO L84 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 42 events. 4/42 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 5 event pairs, 0 based on Foata normal form. 1/42 useless extension candidates. Maximal degree in co-relation 99. Up to 12 conditions per place. [2021-10-15 19:39:21,213 INFO L132 encePairwiseOnDemand]: 36/48 looper letters, 22 selfloop transitions, 15 changer transitions 0/40 dead transitions. [2021-10-15 19:39:21,213 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 40 transitions, 259 flow [2021-10-15 19:39:21,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-15 19:39:21,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-15 19:39:21,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 130 transitions. [2021-10-15 19:39:21,215 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.16927083333333334 [2021-10-15 19:39:21,216 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 130 transitions. [2021-10-15 19:39:21,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 130 transitions. [2021-10-15 19:39:21,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:21,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 130 transitions. [2021-10-15 19:39:21,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 8.125) internal successors, (130), 16 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:21,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 48.0) internal successors, (816), 17 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:21,221 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 48.0) internal successors, (816), 17 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:21,221 INFO L186 Difference]: Start difference. First operand has 51 places, 34 transitions, 163 flow. Second operand 16 states and 130 transitions. [2021-10-15 19:39:21,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 40 transitions, 259 flow [2021-10-15 19:39:21,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 40 transitions, 225 flow, removed 5 selfloop flow, removed 12 redundant places. [2021-10-15 19:39:21,229 INFO L242 Difference]: Finished difference. Result has 55 places, 35 transitions, 177 flow [2021-10-15 19:39:21,230 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=177, PETRI_PLACES=55, PETRI_TRANSITIONS=35} [2021-10-15 19:39:21,230 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 30 predicate places. [2021-10-15 19:39:21,230 INFO L470 AbstractCegarLoop]: Abstraction has has 55 places, 35 transitions, 177 flow [2021-10-15 19:39:21,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 8.058823529411764) internal successors, (137), 17 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:21,233 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:21,233 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:21,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:21,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-15 19:39:21,448 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:21,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:21,449 INFO L82 PathProgramCache]: Analyzing trace with hash 516774580, now seen corresponding path program 5 times [2021-10-15 19:39:21,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:21,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472447070] [2021-10-15 19:39:21,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:21,449 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:21,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:21,626 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 19:39:21,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:21,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472447070] [2021-10-15 19:39:21,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472447070] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:21,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754344242] [2021-10-15 19:39:21,627 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-15 19:39:21,627 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:21,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:21,631 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:21,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 19:39:21,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-10-15 19:39:21,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:39:21,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-15 19:39:21,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:21,886 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-15 19:39:21,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754344242] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:21,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:39:21,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 6] total 21 [2021-10-15 19:39:21,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637227230] [2021-10-15 19:39:21,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-15 19:39:21,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:21,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-15 19:39:21,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-10-15 19:39:21,890 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:39:21,891 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 35 transitions, 177 flow. Second operand has 21 states, 21 states have (on average 9.0) internal successors, (189), 21 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:21,891 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:21,891 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:39:21,891 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:21,996 INFO L129 PetriNetUnfolder]: 6/50 cut-off events. [2021-10-15 19:39:21,996 INFO L130 PetriNetUnfolder]: For 113/113 co-relation queries the response was YES. [2021-10-15 19:39:21,997 INFO L84 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 50 events. 6/50 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 8 event pairs, 0 based on Foata normal form. 3/53 useless extension candidates. Maximal degree in co-relation 110. Up to 17 conditions per place. [2021-10-15 19:39:21,997 INFO L132 encePairwiseOnDemand]: 35/48 looper letters, 23 selfloop transitions, 24 changer transitions 0/50 dead transitions. [2021-10-15 19:39:21,997 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 50 transitions, 329 flow [2021-10-15 19:39:21,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-15 19:39:21,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-10-15 19:39:21,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 176 transitions. [2021-10-15 19:39:21,999 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.1746031746031746 [2021-10-15 19:39:21,999 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 176 transitions. [2021-10-15 19:39:22,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 176 transitions. [2021-10-15 19:39:22,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:22,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 176 transitions. [2021-10-15 19:39:22,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 8.380952380952381) internal successors, (176), 21 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:22,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 48.0) internal successors, (1056), 22 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:22,004 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 48.0) internal successors, (1056), 22 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:22,004 INFO L186 Difference]: Start difference. First operand has 55 places, 35 transitions, 177 flow. Second operand 21 states and 176 transitions. [2021-10-15 19:39:22,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 50 transitions, 329 flow [2021-10-15 19:39:22,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 50 transitions, 291 flow, removed 5 selfloop flow, removed 14 redundant places. [2021-10-15 19:39:22,007 INFO L242 Difference]: Finished difference. Result has 64 places, 40 transitions, 241 flow [2021-10-15 19:39:22,008 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=241, PETRI_PLACES=64, PETRI_TRANSITIONS=40} [2021-10-15 19:39:22,008 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 39 predicate places. [2021-10-15 19:39:22,008 INFO L470 AbstractCegarLoop]: Abstraction has has 64 places, 40 transitions, 241 flow [2021-10-15 19:39:22,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 9.0) internal successors, (189), 21 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:22,008 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:22,009 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:22,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:22,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-15 19:39:22,231 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:22,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:22,231 INFO L82 PathProgramCache]: Analyzing trace with hash 2055346949, now seen corresponding path program 6 times [2021-10-15 19:39:22,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:22,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226764855] [2021-10-15 19:39:22,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:22,232 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:22,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:22,394 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 49 proven. 42 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-15 19:39:22,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:22,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226764855] [2021-10-15 19:39:22,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226764855] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:22,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659840402] [2021-10-15 19:39:22,395 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-15 19:39:22,395 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:22,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:22,402 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:22,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-15 19:39:22,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-10-15 19:39:22,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:39:22,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-15 19:39:22,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:22,657 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 49 proven. 42 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-15 19:39:22,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659840402] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:22,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:39:22,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-10-15 19:39:22,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398867849] [2021-10-15 19:39:22,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-15 19:39:22,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:22,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-15 19:39:22,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-10-15 19:39:22,664 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:39:22,664 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 40 transitions, 241 flow. Second operand has 19 states, 19 states have (on average 8.052631578947368) internal successors, (153), 19 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:22,664 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:22,664 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:39:22,665 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:22,742 INFO L129 PetriNetUnfolder]: 6/52 cut-off events. [2021-10-15 19:39:22,742 INFO L130 PetriNetUnfolder]: For 168/168 co-relation queries the response was YES. [2021-10-15 19:39:22,743 INFO L84 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 52 events. 6/52 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 7 event pairs, 0 based on Foata normal form. 1/53 useless extension candidates. Maximal degree in co-relation 150. Up to 18 conditions per place. [2021-10-15 19:39:22,743 INFO L132 encePairwiseOnDemand]: 36/48 looper letters, 28 selfloop transitions, 17 changer transitions 0/48 dead transitions. [2021-10-15 19:39:22,744 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 48 transitions, 361 flow [2021-10-15 19:39:22,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-15 19:39:22,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-10-15 19:39:22,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 146 transitions. [2021-10-15 19:39:22,745 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.16898148148148148 [2021-10-15 19:39:22,746 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 146 transitions. [2021-10-15 19:39:22,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 146 transitions. [2021-10-15 19:39:22,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:22,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 146 transitions. [2021-10-15 19:39:22,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 8.11111111111111) internal successors, (146), 18 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:22,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 48.0) internal successors, (912), 19 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:22,749 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 48.0) internal successors, (912), 19 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:22,749 INFO L186 Difference]: Start difference. First operand has 64 places, 40 transitions, 241 flow. Second operand 18 states and 146 transitions. [2021-10-15 19:39:22,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 48 transitions, 361 flow [2021-10-15 19:39:22,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 48 transitions, 299 flow, removed 10 selfloop flow, removed 17 redundant places. [2021-10-15 19:39:22,754 INFO L242 Difference]: Finished difference. Result has 65 places, 41 transitions, 235 flow [2021-10-15 19:39:22,754 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=235, PETRI_PLACES=65, PETRI_TRANSITIONS=41} [2021-10-15 19:39:22,755 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 40 predicate places. [2021-10-15 19:39:22,755 INFO L470 AbstractCegarLoop]: Abstraction has has 65 places, 41 transitions, 235 flow [2021-10-15 19:39:22,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 8.052631578947368) internal successors, (153), 19 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:22,755 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:22,755 INFO L254 CegarLoopForPetriNet]: trace histogram [11, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:22,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:22,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:22,973 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:22,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:22,974 INFO L82 PathProgramCache]: Analyzing trace with hash -891324766, now seen corresponding path program 7 times [2021-10-15 19:39:22,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:22,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464057933] [2021-10-15 19:39:22,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:22,974 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:22,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:23,157 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-15 19:39:23,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:23,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464057933] [2021-10-15 19:39:23,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464057933] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:23,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808300461] [2021-10-15 19:39:23,157 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-15 19:39:23,158 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:23,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:23,158 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:23,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-15 19:39:23,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:23,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-15 19:39:23,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:23,402 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-15 19:39:23,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808300461] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:23,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:39:23,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-10-15 19:39:23,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345401756] [2021-10-15 19:39:23,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-15 19:39:23,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:23,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-15 19:39:23,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-10-15 19:39:23,405 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:39:23,406 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 41 transitions, 235 flow. Second operand has 20 states, 20 states have (on average 8.05) internal successors, (161), 20 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:23,406 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:23,406 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:39:23,406 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:23,485 INFO L129 PetriNetUnfolder]: 6/54 cut-off events. [2021-10-15 19:39:23,485 INFO L130 PetriNetUnfolder]: For 177/177 co-relation queries the response was YES. [2021-10-15 19:39:23,486 INFO L84 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 54 events. 6/54 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 7 event pairs, 0 based on Foata normal form. 1/55 useless extension candidates. Maximal degree in co-relation 157. Up to 19 conditions per place. [2021-10-15 19:39:23,486 INFO L132 encePairwiseOnDemand]: 36/48 looper letters, 29 selfloop transitions, 18 changer transitions 0/50 dead transitions. [2021-10-15 19:39:23,486 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 50 transitions, 363 flow [2021-10-15 19:39:23,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-15 19:39:23,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-15 19:39:23,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 154 transitions. [2021-10-15 19:39:23,488 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.16885964912280702 [2021-10-15 19:39:23,489 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 154 transitions. [2021-10-15 19:39:23,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 154 transitions. [2021-10-15 19:39:23,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:23,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 154 transitions. [2021-10-15 19:39:23,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 8.105263157894736) internal successors, (154), 19 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:23,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 48.0) internal successors, (960), 20 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:23,492 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 48.0) internal successors, (960), 20 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:23,492 INFO L186 Difference]: Start difference. First operand has 65 places, 41 transitions, 235 flow. Second operand 19 states and 154 transitions. [2021-10-15 19:39:23,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 50 transitions, 363 flow [2021-10-15 19:39:23,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 50 transitions, 317 flow, removed 7 selfloop flow, removed 16 redundant places. [2021-10-15 19:39:23,496 INFO L242 Difference]: Finished difference. Result has 68 places, 42 transitions, 249 flow [2021-10-15 19:39:23,497 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=249, PETRI_PLACES=68, PETRI_TRANSITIONS=42} [2021-10-15 19:39:23,497 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 43 predicate places. [2021-10-15 19:39:23,497 INFO L470 AbstractCegarLoop]: Abstraction has has 68 places, 42 transitions, 249 flow [2021-10-15 19:39:23,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 8.05) internal successors, (161), 20 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:23,498 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:23,498 INFO L254 CegarLoopForPetriNet]: trace histogram [12, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:23,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:23,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-15 19:39:23,715 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:23,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:23,716 INFO L82 PathProgramCache]: Analyzing trace with hash 2035572479, now seen corresponding path program 8 times [2021-10-15 19:39:23,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:23,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307626938] [2021-10-15 19:39:23,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:23,716 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:23,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:23,903 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 63 proven. 72 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-15 19:39:23,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:23,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307626938] [2021-10-15 19:39:23,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307626938] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:23,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370945884] [2021-10-15 19:39:23,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:39:23,905 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:23,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:23,906 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:23,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-15 19:39:24,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:39:24,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:39:24,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-15 19:39:24,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:24,291 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 77 proven. 25 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-10-15 19:39:24,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370945884] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:24,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:39:24,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8] total 26 [2021-10-15 19:39:24,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811512397] [2021-10-15 19:39:24,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-15 19:39:24,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:24,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-15 19:39:24,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-10-15 19:39:24,294 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:39:24,294 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 42 transitions, 249 flow. Second operand has 26 states, 26 states have (on average 8.807692307692308) internal successors, (229), 26 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:24,295 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:24,295 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:39:24,295 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:24,425 INFO L129 PetriNetUnfolder]: 8/62 cut-off events. [2021-10-15 19:39:24,425 INFO L130 PetriNetUnfolder]: For 230/230 co-relation queries the response was YES. [2021-10-15 19:39:24,426 INFO L84 FinitePrefix]: Finished finitePrefix Result has 240 conditions, 62 events. 8/62 cut-off events. For 230/230 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 9 event pairs, 0 based on Foata normal form. 3/65 useless extension candidates. Maximal degree in co-relation 168. Up to 24 conditions per place. [2021-10-15 19:39:24,426 INFO L132 encePairwiseOnDemand]: 35/48 looper letters, 28 selfloop transitions, 31 changer transitions 0/62 dead transitions. [2021-10-15 19:39:24,426 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 62 transitions, 445 flow [2021-10-15 19:39:24,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-15 19:39:24,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-10-15 19:39:24,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 218 transitions. [2021-10-15 19:39:24,429 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.17467948717948717 [2021-10-15 19:39:24,429 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 218 transitions. [2021-10-15 19:39:24,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 218 transitions. [2021-10-15 19:39:24,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:24,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 218 transitions. [2021-10-15 19:39:24,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 8.384615384615385) internal successors, (218), 26 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:24,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 48.0) internal successors, (1296), 27 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:24,435 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 48.0) internal successors, (1296), 27 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:24,436 INFO L186 Difference]: Start difference. First operand has 68 places, 42 transitions, 249 flow. Second operand 26 states and 218 transitions. [2021-10-15 19:39:24,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 62 transitions, 445 flow [2021-10-15 19:39:24,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 62 transitions, 395 flow, removed 8 selfloop flow, removed 17 redundant places. [2021-10-15 19:39:24,442 INFO L242 Difference]: Finished difference. Result has 79 places, 47 transitions, 325 flow [2021-10-15 19:39:24,442 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=325, PETRI_PLACES=79, PETRI_TRANSITIONS=47} [2021-10-15 19:39:24,442 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 54 predicate places. [2021-10-15 19:39:24,442 INFO L470 AbstractCegarLoop]: Abstraction has has 79 places, 47 transitions, 325 flow [2021-10-15 19:39:24,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 8.807692307692308) internal successors, (229), 26 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:24,443 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:24,443 INFO L254 CegarLoopForPetriNet]: trace histogram [15, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:24,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:24,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-15 19:39:24,663 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:24,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:24,663 INFO L82 PathProgramCache]: Analyzing trace with hash 512283024, now seen corresponding path program 9 times [2021-10-15 19:39:24,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:24,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882878768] [2021-10-15 19:39:24,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:24,664 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:24,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:24,901 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-15 19:39:24,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:24,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882878768] [2021-10-15 19:39:24,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882878768] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:24,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978353839] [2021-10-15 19:39:24,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:39:24,902 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:24,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:24,907 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:24,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-15 19:39:25,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-10-15 19:39:25,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:39:25,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-15 19:39:25,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:25,348 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 117 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-15 19:39:25,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978353839] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:25,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:39:25,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2021-10-15 19:39:25,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59559094] [2021-10-15 19:39:25,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-15 19:39:25,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:25,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-15 19:39:25,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-10-15 19:39:25,351 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:39:25,352 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 47 transitions, 325 flow. Second operand has 28 states, 28 states have (on average 8.75) internal successors, (245), 28 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:25,352 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:25,352 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:39:25,352 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:25,486 INFO L129 PetriNetUnfolder]: 9/67 cut-off events. [2021-10-15 19:39:25,486 INFO L130 PetriNetUnfolder]: For 323/323 co-relation queries the response was YES. [2021-10-15 19:39:25,486 INFO L84 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 67 events. 9/67 cut-off events. For 323/323 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 11 event pairs, 0 based on Foata normal form. 2/69 useless extension candidates. Maximal degree in co-relation 208. Up to 27 conditions per place. [2021-10-15 19:39:25,487 INFO L132 encePairwiseOnDemand]: 35/48 looper letters, 30 selfloop transitions, 34 changer transitions 0/67 dead transitions. [2021-10-15 19:39:25,487 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 67 transitions, 527 flow [2021-10-15 19:39:25,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-15 19:39:25,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-10-15 19:39:25,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 234 transitions. [2021-10-15 19:39:25,490 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.17410714285714285 [2021-10-15 19:39:25,490 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 234 transitions. [2021-10-15 19:39:25,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 234 transitions. [2021-10-15 19:39:25,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:25,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 234 transitions. [2021-10-15 19:39:25,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 8.357142857142858) internal successors, (234), 28 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:25,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 48.0) internal successors, (1392), 29 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:25,494 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 48.0) internal successors, (1392), 29 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:25,494 INFO L186 Difference]: Start difference. First operand has 79 places, 47 transitions, 325 flow. Second operand 28 states and 234 transitions. [2021-10-15 19:39:25,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 67 transitions, 527 flow [2021-10-15 19:39:25,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 67 transitions, 435 flow, removed 17 selfloop flow, removed 22 redundant places. [2021-10-15 19:39:25,500 INFO L242 Difference]: Finished difference. Result has 86 places, 50 transitions, 352 flow [2021-10-15 19:39:25,501 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=352, PETRI_PLACES=86, PETRI_TRANSITIONS=50} [2021-10-15 19:39:25,501 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 61 predicate places. [2021-10-15 19:39:25,502 INFO L470 AbstractCegarLoop]: Abstraction has has 86 places, 50 transitions, 352 flow [2021-10-15 19:39:25,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 8.75) internal successors, (245), 28 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:25,502 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:25,502 INFO L254 CegarLoopForPetriNet]: trace histogram [17, 10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:25,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:25,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:25,711 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:25,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:25,711 INFO L82 PathProgramCache]: Analyzing trace with hash 632258215, now seen corresponding path program 10 times [2021-10-15 19:39:25,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:25,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305196474] [2021-10-15 19:39:25,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:25,712 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:25,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:25,977 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 143 proven. 110 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-15 19:39:25,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:25,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305196474] [2021-10-15 19:39:25,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305196474] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:25,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352528590] [2021-10-15 19:39:25,978 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 19:39:25,978 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:25,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:25,983 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:25,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-15 19:39:26,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 19:39:26,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:39:26,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-15 19:39:26,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:26,344 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 143 proven. 110 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-15 19:39:26,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352528590] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:26,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:39:26,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-10-15 19:39:26,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225027032] [2021-10-15 19:39:26,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-15 19:39:26,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:26,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-15 19:39:26,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-10-15 19:39:26,347 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:39:26,348 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 50 transitions, 352 flow. Second operand has 23 states, 23 states have (on average 8.043478260869565) internal successors, (185), 23 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:26,348 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:26,348 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:39:26,348 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:26,452 INFO L129 PetriNetUnfolder]: 9/69 cut-off events. [2021-10-15 19:39:26,452 INFO L130 PetriNetUnfolder]: For 343/343 co-relation queries the response was YES. [2021-10-15 19:39:26,452 INFO L84 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 69 events. 9/69 cut-off events. For 343/343 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 10 event pairs, 0 based on Foata normal form. 1/70 useless extension candidates. Maximal degree in co-relation 231. Up to 28 conditions per place. [2021-10-15 19:39:26,453 INFO L132 encePairwiseOnDemand]: 36/48 looper letters, 38 selfloop transitions, 21 changer transitions 0/62 dead transitions. [2021-10-15 19:39:26,453 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 62 transitions, 516 flow [2021-10-15 19:39:26,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-15 19:39:26,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-15 19:39:26,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 178 transitions. [2021-10-15 19:39:26,455 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.16856060606060605 [2021-10-15 19:39:26,456 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 178 transitions. [2021-10-15 19:39:26,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 178 transitions. [2021-10-15 19:39:26,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:26,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 178 transitions. [2021-10-15 19:39:26,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 8.090909090909092) internal successors, (178), 22 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:26,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 48.0) internal successors, (1104), 23 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:26,459 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 48.0) internal successors, (1104), 23 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:26,460 INFO L186 Difference]: Start difference. First operand has 86 places, 50 transitions, 352 flow. Second operand 22 states and 178 transitions. [2021-10-15 19:39:26,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 62 transitions, 516 flow [2021-10-15 19:39:26,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 62 transitions, 430 flow, removed 13 selfloop flow, removed 24 redundant places. [2021-10-15 19:39:26,465 INFO L242 Difference]: Finished difference. Result has 84 places, 51 transitions, 338 flow [2021-10-15 19:39:26,466 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=338, PETRI_PLACES=84, PETRI_TRANSITIONS=51} [2021-10-15 19:39:26,466 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 59 predicate places. [2021-10-15 19:39:26,466 INFO L470 AbstractCegarLoop]: Abstraction has has 84 places, 51 transitions, 338 flow [2021-10-15 19:39:26,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 8.043478260869565) internal successors, (185), 23 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:26,467 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:26,467 INFO L254 CegarLoopForPetriNet]: trace histogram [18, 11, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:26,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:26,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-15 19:39:26,683 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:26,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:26,683 INFO L82 PathProgramCache]: Analyzing trace with hash 698467204, now seen corresponding path program 11 times [2021-10-15 19:39:26,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:26,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275395347] [2021-10-15 19:39:26,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:26,684 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:26,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:26,932 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-15 19:39:26,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:26,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275395347] [2021-10-15 19:39:26,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275395347] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:26,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236311728] [2021-10-15 19:39:26,933 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-15 19:39:26,934 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:26,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:26,937 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:26,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-15 19:39:27,102 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-10-15 19:39:27,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:39:27,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-15 19:39:27,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:27,464 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 81 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-15 19:39:27,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236311728] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:27,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:39:27,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12] total 33 [2021-10-15 19:39:27,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105327760] [2021-10-15 19:39:27,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-15 19:39:27,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:27,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-15 19:39:27,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-10-15 19:39:27,467 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:39:27,468 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 51 transitions, 338 flow. Second operand has 33 states, 33 states have (on average 8.636363636363637) internal successors, (285), 33 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:27,468 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:27,468 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:39:27,468 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:27,630 INFO L129 PetriNetUnfolder]: 12/80 cut-off events. [2021-10-15 19:39:27,630 INFO L130 PetriNetUnfolder]: For 411/411 co-relation queries the response was YES. [2021-10-15 19:39:27,631 INFO L84 FinitePrefix]: Finished finitePrefix Result has 330 conditions, 80 events. 12/80 cut-off events. For 411/411 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 14 event pairs, 0 based on Foata normal form. 4/84 useless extension candidates. Maximal degree in co-relation 232. Up to 35 conditions per place. [2021-10-15 19:39:27,631 INFO L132 encePairwiseOnDemand]: 35/48 looper letters, 35 selfloop transitions, 42 changer transitions 0/80 dead transitions. [2021-10-15 19:39:27,632 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 80 transitions, 613 flow [2021-10-15 19:39:27,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-15 19:39:27,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-10-15 19:39:27,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 279 transitions. [2021-10-15 19:39:27,638 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.17613636363636365 [2021-10-15 19:39:27,638 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 279 transitions. [2021-10-15 19:39:27,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 279 transitions. [2021-10-15 19:39:27,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:27,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 279 transitions. [2021-10-15 19:39:27,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 8.454545454545455) internal successors, (279), 33 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:27,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 48.0) internal successors, (1632), 34 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:27,650 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 48.0) internal successors, (1632), 34 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:27,650 INFO L186 Difference]: Start difference. First operand has 84 places, 51 transitions, 338 flow. Second operand 33 states and 279 transitions. [2021-10-15 19:39:27,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 80 transitions, 613 flow [2021-10-15 19:39:27,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 80 transitions, 551 flow, removed 11 selfloop flow, removed 20 redundant places. [2021-10-15 19:39:27,659 INFO L242 Difference]: Finished difference. Result has 100 places, 58 transitions, 458 flow [2021-10-15 19:39:27,660 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=458, PETRI_PLACES=100, PETRI_TRANSITIONS=58} [2021-10-15 19:39:27,660 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 75 predicate places. [2021-10-15 19:39:27,660 INFO L470 AbstractCegarLoop]: Abstraction has has 100 places, 58 transitions, 458 flow [2021-10-15 19:39:27,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 8.636363636363637) internal successors, (285), 33 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:27,661 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:27,661 INFO L254 CegarLoopForPetriNet]: trace histogram [22, 12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:27,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:27,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:27,887 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:27,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:27,887 INFO L82 PathProgramCache]: Analyzing trace with hash -821055537, now seen corresponding path program 12 times [2021-10-15 19:39:27,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:27,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960346855] [2021-10-15 19:39:27,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:27,888 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:27,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:28,219 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 247 proven. 156 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-10-15 19:39:28,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:28,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960346855] [2021-10-15 19:39:28,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960346855] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:28,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780425271] [2021-10-15 19:39:28,221 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-15 19:39:28,221 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:28,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:28,248 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:28,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-15 19:39:28,481 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-10-15 19:39:28,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:39:28,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-15 19:39:28,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:28,733 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 247 proven. 156 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-10-15 19:39:28,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780425271] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:28,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:39:28,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-10-15 19:39:28,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326193933] [2021-10-15 19:39:28,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-15 19:39:28,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:28,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-15 19:39:28,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-10-15 19:39:28,736 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:39:28,737 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 58 transitions, 458 flow. Second operand has 25 states, 25 states have (on average 8.04) internal successors, (201), 25 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:28,737 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:28,737 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:39:28,737 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:28,839 INFO L129 PetriNetUnfolder]: 12/82 cut-off events. [2021-10-15 19:39:28,839 INFO L130 PetriNetUnfolder]: For 516/516 co-relation queries the response was YES. [2021-10-15 19:39:28,840 INFO L84 FinitePrefix]: Finished finitePrefix Result has 374 conditions, 82 events. 12/82 cut-off events. For 516/516 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 13 event pairs, 0 based on Foata normal form. 1/83 useless extension candidates. Maximal degree in co-relation 295. Up to 36 conditions per place. [2021-10-15 19:39:28,841 INFO L132 encePairwiseOnDemand]: 36/48 looper letters, 46 selfloop transitions, 23 changer transitions 0/72 dead transitions. [2021-10-15 19:39:28,841 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 72 transitions, 650 flow [2021-10-15 19:39:28,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-15 19:39:28,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-15 19:39:28,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 194 transitions. [2021-10-15 19:39:28,843 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.1684027777777778 [2021-10-15 19:39:28,843 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 194 transitions. [2021-10-15 19:39:28,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 194 transitions. [2021-10-15 19:39:28,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:28,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 194 transitions. [2021-10-15 19:39:28,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 8.083333333333334) internal successors, (194), 24 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:28,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 48.0) internal successors, (1200), 25 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:28,846 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 48.0) internal successors, (1200), 25 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:28,847 INFO L186 Difference]: Start difference. First operand has 100 places, 58 transitions, 458 flow. Second operand 24 states and 194 transitions. [2021-10-15 19:39:28,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 72 transitions, 650 flow [2021-10-15 19:39:28,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 72 transitions, 517 flow, removed 25 selfloop flow, removed 29 redundant places. [2021-10-15 19:39:28,855 INFO L242 Difference]: Finished difference. Result has 95 places, 59 transitions, 405 flow [2021-10-15 19:39:28,855 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=405, PETRI_PLACES=95, PETRI_TRANSITIONS=59} [2021-10-15 19:39:28,855 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 70 predicate places. [2021-10-15 19:39:28,855 INFO L470 AbstractCegarLoop]: Abstraction has has 95 places, 59 transitions, 405 flow [2021-10-15 19:39:28,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 8.04) internal successors, (201), 25 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:28,856 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:28,856 INFO L254 CegarLoopForPetriNet]: trace histogram [23, 13, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:28,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:29,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:29,083 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:29,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:29,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1433093228, now seen corresponding path program 13 times [2021-10-15 19:39:29,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:29,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871996163] [2021-10-15 19:39:29,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:29,084 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:29,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:29,372 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 266 proven. 182 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-10-15 19:39:29,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:29,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871996163] [2021-10-15 19:39:29,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871996163] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:29,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93935826] [2021-10-15 19:39:29,373 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-15 19:39:29,373 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:29,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:29,374 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:29,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-15 19:39:29,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:29,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-15 19:39:29,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:29,824 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 266 proven. 182 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-10-15 19:39:29,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93935826] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:29,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:39:29,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-10-15 19:39:29,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509930015] [2021-10-15 19:39:29,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-15 19:39:29,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:29,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-15 19:39:29,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-10-15 19:39:29,826 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:39:29,827 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 59 transitions, 405 flow. Second operand has 26 states, 26 states have (on average 8.038461538461538) internal successors, (209), 26 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:29,827 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:29,827 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:39:29,827 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:29,933 INFO L129 PetriNetUnfolder]: 12/84 cut-off events. [2021-10-15 19:39:29,933 INFO L130 PetriNetUnfolder]: For 486/486 co-relation queries the response was YES. [2021-10-15 19:39:29,934 INFO L84 FinitePrefix]: Finished finitePrefix Result has 354 conditions, 84 events. 12/84 cut-off events. For 486/486 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 13 event pairs, 0 based on Foata normal form. 1/85 useless extension candidates. Maximal degree in co-relation 286. Up to 37 conditions per place. [2021-10-15 19:39:29,935 INFO L132 encePairwiseOnDemand]: 36/48 looper letters, 47 selfloop transitions, 24 changer transitions 0/74 dead transitions. [2021-10-15 19:39:29,935 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 74 transitions, 605 flow [2021-10-15 19:39:29,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-15 19:39:29,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-10-15 19:39:29,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 202 transitions. [2021-10-15 19:39:29,937 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.16833333333333333 [2021-10-15 19:39:29,937 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 202 transitions. [2021-10-15 19:39:29,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 202 transitions. [2021-10-15 19:39:29,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:29,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 202 transitions. [2021-10-15 19:39:29,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 8.08) internal successors, (202), 25 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:29,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 48.0) internal successors, (1248), 26 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:29,947 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 48.0) internal successors, (1248), 26 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:29,947 INFO L186 Difference]: Start difference. First operand has 95 places, 59 transitions, 405 flow. Second operand 25 states and 202 transitions. [2021-10-15 19:39:29,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 74 transitions, 605 flow [2021-10-15 19:39:29,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 74 transitions, 535 flow, removed 13 selfloop flow, removed 22 redundant places. [2021-10-15 19:39:29,955 INFO L242 Difference]: Finished difference. Result has 98 places, 60 transitions, 419 flow [2021-10-15 19:39:29,956 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=419, PETRI_PLACES=98, PETRI_TRANSITIONS=60} [2021-10-15 19:39:29,956 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 73 predicate places. [2021-10-15 19:39:29,956 INFO L470 AbstractCegarLoop]: Abstraction has has 98 places, 60 transitions, 419 flow [2021-10-15 19:39:29,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 8.038461538461538) internal successors, (209), 26 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:29,956 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:29,957 INFO L254 CegarLoopForPetriNet]: trace histogram [24, 14, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:29,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:30,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-15 19:39:30,179 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:30,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:30,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1288428087, now seen corresponding path program 14 times [2021-10-15 19:39:30,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:30,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934221693] [2021-10-15 19:39:30,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:30,180 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:30,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:30,454 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 285 proven. 210 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-10-15 19:39:30,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:30,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934221693] [2021-10-15 19:39:30,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934221693] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:30,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398693843] [2021-10-15 19:39:30,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:39:30,455 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:30,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:30,462 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:30,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-15 19:39:30,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:39:30,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:39:30,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-15 19:39:30,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:30,932 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 285 proven. 210 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-10-15 19:39:30,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398693843] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:30,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:39:30,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-10-15 19:39:30,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654615585] [2021-10-15 19:39:30,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-15 19:39:30,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:30,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-15 19:39:30,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-10-15 19:39:30,934 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:39:30,934 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 60 transitions, 419 flow. Second operand has 27 states, 27 states have (on average 8.037037037037036) internal successors, (217), 27 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:30,935 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:30,935 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:39:30,935 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:31,056 INFO L129 PetriNetUnfolder]: 12/86 cut-off events. [2021-10-15 19:39:31,056 INFO L130 PetriNetUnfolder]: For 553/553 co-relation queries the response was YES. [2021-10-15 19:39:31,059 INFO L84 FinitePrefix]: Finished finitePrefix Result has 366 conditions, 86 events. 12/86 cut-off events. For 553/553 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 13 event pairs, 0 based on Foata normal form. 1/87 useless extension candidates. Maximal degree in co-relation 297. Up to 38 conditions per place. [2021-10-15 19:39:31,060 INFO L132 encePairwiseOnDemand]: 36/48 looper letters, 48 selfloop transitions, 25 changer transitions 0/76 dead transitions. [2021-10-15 19:39:31,060 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 76 transitions, 627 flow [2021-10-15 19:39:31,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-15 19:39:31,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-10-15 19:39:31,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 210 transitions. [2021-10-15 19:39:31,065 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.16826923076923078 [2021-10-15 19:39:31,066 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 210 transitions. [2021-10-15 19:39:31,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 210 transitions. [2021-10-15 19:39:31,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:31,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 210 transitions. [2021-10-15 19:39:31,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 8.076923076923077) internal successors, (210), 26 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:31,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 48.0) internal successors, (1296), 27 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:31,070 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 48.0) internal successors, (1296), 27 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:31,070 INFO L186 Difference]: Start difference. First operand has 98 places, 60 transitions, 419 flow. Second operand 26 states and 210 transitions. [2021-10-15 19:39:31,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 76 transitions, 627 flow [2021-10-15 19:39:31,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 76 transitions, 553 flow, removed 14 selfloop flow, removed 23 redundant places. [2021-10-15 19:39:31,078 INFO L242 Difference]: Finished difference. Result has 101 places, 61 transitions, 433 flow [2021-10-15 19:39:31,078 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=433, PETRI_PLACES=101, PETRI_TRANSITIONS=61} [2021-10-15 19:39:31,079 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 76 predicate places. [2021-10-15 19:39:31,079 INFO L470 AbstractCegarLoop]: Abstraction has has 101 places, 61 transitions, 433 flow [2021-10-15 19:39:31,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 8.037037037037036) internal successors, (217), 27 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:31,079 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:31,080 INFO L254 CegarLoopForPetriNet]: trace histogram [25, 15, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:31,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:31,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:31,295 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:31,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:31,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1035328538, now seen corresponding path program 15 times [2021-10-15 19:39:31,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:31,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126155686] [2021-10-15 19:39:31,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:31,296 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:31,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:31,623 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 304 proven. 240 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-10-15 19:39:31,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:31,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126155686] [2021-10-15 19:39:31,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126155686] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:31,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723243305] [2021-10-15 19:39:31,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:39:31,623 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:31,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:31,626 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:31,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-15 19:39:31,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-10-15 19:39:31,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:39:31,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-15 19:39:31,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:32,342 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 315 proven. 100 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-10-15 19:39:32,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723243305] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:32,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:39:32,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 13] total 38 [2021-10-15 19:39:32,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916153247] [2021-10-15 19:39:32,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-15 19:39:32,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:32,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-15 19:39:32,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-10-15 19:39:32,346 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:39:32,346 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 61 transitions, 433 flow. Second operand has 38 states, 38 states have (on average 8.552631578947368) internal successors, (325), 38 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:32,346 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:32,346 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:39:32,346 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:32,553 INFO L129 PetriNetUnfolder]: 13/91 cut-off events. [2021-10-15 19:39:32,553 INFO L130 PetriNetUnfolder]: For 653/653 co-relation queries the response was YES. [2021-10-15 19:39:32,554 INFO L84 FinitePrefix]: Finished finitePrefix Result has 390 conditions, 91 events. 13/91 cut-off events. For 653/653 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 15 event pairs, 0 based on Foata normal form. 2/93 useless extension candidates. Maximal degree in co-relation 308. Up to 41 conditions per place. [2021-10-15 19:39:32,555 INFO L132 encePairwiseOnDemand]: 35/48 looper letters, 40 selfloop transitions, 48 changer transitions 0/91 dead transitions. [2021-10-15 19:39:32,555 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 91 transitions, 713 flow [2021-10-15 19:39:32,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-15 19:39:32,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-10-15 19:39:32,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 318 transitions. [2021-10-15 19:39:32,562 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.17434210526315788 [2021-10-15 19:39:32,563 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 318 transitions. [2021-10-15 19:39:32,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 318 transitions. [2021-10-15 19:39:32,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:32,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 318 transitions. [2021-10-15 19:39:32,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 8.368421052631579) internal successors, (318), 38 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:32,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 48.0) internal successors, (1872), 39 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:32,574 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 48.0) internal successors, (1872), 39 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:32,575 INFO L186 Difference]: Start difference. First operand has 101 places, 61 transitions, 433 flow. Second operand 38 states and 318 transitions. [2021-10-15 19:39:32,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 91 transitions, 713 flow [2021-10-15 19:39:32,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 91 transitions, 635 flow, removed 15 selfloop flow, removed 24 redundant places. [2021-10-15 19:39:32,584 INFO L242 Difference]: Finished difference. Result has 116 places, 64 transitions, 512 flow [2021-10-15 19:39:32,584 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=512, PETRI_PLACES=116, PETRI_TRANSITIONS=64} [2021-10-15 19:39:32,585 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 91 predicate places. [2021-10-15 19:39:32,585 INFO L470 AbstractCegarLoop]: Abstraction has has 116 places, 64 transitions, 512 flow [2021-10-15 19:39:32,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 8.552631578947368) internal successors, (325), 38 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:32,585 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:32,585 INFO L254 CegarLoopForPetriNet]: trace histogram [27, 16, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:32,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:32,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:32,799 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:32,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:32,799 INFO L82 PathProgramCache]: Analyzing trace with hash -782408963, now seen corresponding path program 16 times [2021-10-15 19:39:32,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:32,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365750922] [2021-10-15 19:39:32,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:32,799 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:32,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:33,185 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 357 proven. 272 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-15 19:39:33,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:33,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365750922] [2021-10-15 19:39:33,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365750922] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:33,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14626181] [2021-10-15 19:39:33,186 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 19:39:33,186 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:33,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:33,188 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:33,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-15 19:39:33,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 19:39:33,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:39:33,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-15 19:39:33,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:33,726 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 357 proven. 272 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-15 19:39:33,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14626181] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:33,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:39:33,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-10-15 19:39:33,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641092912] [2021-10-15 19:39:33,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-15 19:39:33,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:33,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-15 19:39:33,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-10-15 19:39:33,731 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:39:33,731 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 64 transitions, 512 flow. Second operand has 29 states, 29 states have (on average 8.03448275862069) internal successors, (233), 29 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:33,731 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:33,732 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:39:33,732 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:33,871 INFO L129 PetriNetUnfolder]: 13/93 cut-off events. [2021-10-15 19:39:33,872 INFO L130 PetriNetUnfolder]: For 743/743 co-relation queries the response was YES. [2021-10-15 19:39:33,872 INFO L84 FinitePrefix]: Finished finitePrefix Result has 428 conditions, 93 events. 13/93 cut-off events. For 743/743 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 14 event pairs, 0 based on Foata normal form. 1/94 useless extension candidates. Maximal degree in co-relation 347. Up to 42 conditions per place. [2021-10-15 19:39:33,873 INFO L132 encePairwiseOnDemand]: 36/48 looper letters, 52 selfloop transitions, 27 changer transitions 0/82 dead transitions. [2021-10-15 19:39:33,873 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 82 transitions, 740 flow [2021-10-15 19:39:33,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-15 19:39:33,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-10-15 19:39:33,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 226 transitions. [2021-10-15 19:39:33,875 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.16815476190476192 [2021-10-15 19:39:33,875 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 226 transitions. [2021-10-15 19:39:33,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 226 transitions. [2021-10-15 19:39:33,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:33,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 226 transitions. [2021-10-15 19:39:33,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 8.071428571428571) internal successors, (226), 28 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:33,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 48.0) internal successors, (1392), 29 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:33,879 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 48.0) internal successors, (1392), 29 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:33,879 INFO L186 Difference]: Start difference. First operand has 116 places, 64 transitions, 512 flow. Second operand 28 states and 226 transitions. [2021-10-15 19:39:33,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 82 transitions, 740 flow [2021-10-15 19:39:33,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 82 transitions, 612 flow, removed 20 selfloop flow, removed 34 redundant places. [2021-10-15 19:39:33,889 INFO L242 Difference]: Finished difference. Result has 110 places, 65 transitions, 480 flow [2021-10-15 19:39:33,890 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=480, PETRI_PLACES=110, PETRI_TRANSITIONS=65} [2021-10-15 19:39:33,890 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 85 predicate places. [2021-10-15 19:39:33,890 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 65 transitions, 480 flow [2021-10-15 19:39:33,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 8.03448275862069) internal successors, (233), 29 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:33,891 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:33,891 INFO L254 CegarLoopForPetriNet]: trace histogram [28, 17, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:33,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:34,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-15 19:39:34,107 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:34,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:34,107 INFO L82 PathProgramCache]: Analyzing trace with hash -376334502, now seen corresponding path program 17 times [2021-10-15 19:39:34,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:34,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341845464] [2021-10-15 19:39:34,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:34,108 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:34,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:34,478 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 378 proven. 306 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-15 19:39:34,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:34,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341845464] [2021-10-15 19:39:34,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341845464] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:34,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903636332] [2021-10-15 19:39:34,479 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-15 19:39:34,479 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:34,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:34,483 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:34,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-15 19:39:34,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2021-10-15 19:39:34,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:39:34,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-15 19:39:34,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:35,327 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 405 proven. 169 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-10-15 19:39:35,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903636332] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:35,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:39:35,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 16] total 43 [2021-10-15 19:39:35,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377969725] [2021-10-15 19:39:35,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-10-15 19:39:35,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:35,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-10-15 19:39:35,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-10-15 19:39:35,330 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:39:35,331 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 65 transitions, 480 flow. Second operand has 43 states, 43 states have (on average 8.488372093023257) internal successors, (365), 43 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:35,331 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:35,331 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:39:35,331 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:35,547 INFO L129 PetriNetUnfolder]: 16/104 cut-off events. [2021-10-15 19:39:35,547 INFO L130 PetriNetUnfolder]: For 881/881 co-relation queries the response was YES. [2021-10-15 19:39:35,548 INFO L84 FinitePrefix]: Finished finitePrefix Result has 456 conditions, 104 events. 16/104 cut-off events. For 881/881 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 17 event pairs, 0 based on Foata normal form. 4/108 useless extension candidates. Maximal degree in co-relation 340. Up to 49 conditions per place. [2021-10-15 19:39:35,549 INFO L132 encePairwiseOnDemand]: 35/48 looper letters, 45 selfloop transitions, 56 changer transitions 0/104 dead transitions. [2021-10-15 19:39:35,549 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 104 transitions, 841 flow [2021-10-15 19:39:35,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-10-15 19:39:35,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-10-15 19:39:35,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 363 transitions. [2021-10-15 19:39:35,551 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.17587209302325582 [2021-10-15 19:39:35,551 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 363 transitions. [2021-10-15 19:39:35,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 363 transitions. [2021-10-15 19:39:35,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:35,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 363 transitions. [2021-10-15 19:39:35,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 8.44186046511628) internal successors, (363), 43 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:35,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 48.0) internal successors, (2112), 44 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:35,557 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 48.0) internal successors, (2112), 44 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:35,557 INFO L186 Difference]: Start difference. First operand has 110 places, 65 transitions, 480 flow. Second operand 43 states and 363 transitions. [2021-10-15 19:39:35,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 104 transitions, 841 flow [2021-10-15 19:39:35,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 104 transitions, 755 flow, removed 17 selfloop flow, removed 26 redundant places. [2021-10-15 19:39:35,569 INFO L242 Difference]: Finished difference. Result has 130 places, 72 transitions, 622 flow [2021-10-15 19:39:35,569 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=622, PETRI_PLACES=130, PETRI_TRANSITIONS=72} [2021-10-15 19:39:35,569 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 105 predicate places. [2021-10-15 19:39:35,570 INFO L470 AbstractCegarLoop]: Abstraction has has 130 places, 72 transitions, 622 flow [2021-10-15 19:39:35,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 8.488372093023257) internal successors, (365), 43 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:35,570 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:35,570 INFO L254 CegarLoopForPetriNet]: trace histogram [32, 18, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:35,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:35,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-15 19:39:35,795 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:35,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:35,795 INFO L82 PathProgramCache]: Analyzing trace with hash -467322203, now seen corresponding path program 18 times [2021-10-15 19:39:35,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:35,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002286528] [2021-10-15 19:39:35,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:35,796 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:35,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:36,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 513 proven. 342 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-10-15 19:39:36,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:36,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002286528] [2021-10-15 19:39:36,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002286528] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:36,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264814578] [2021-10-15 19:39:36,207 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-15 19:39:36,207 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:36,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:36,211 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:36,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-15 19:39:36,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2021-10-15 19:39:36,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:39:36,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-15 19:39:36,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:37,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 256 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-10-15 19:39:37,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264814578] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:37,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:39:37,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 19] total 47 [2021-10-15 19:39:37,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342203861] [2021-10-15 19:39:37,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-10-15 19:39:37,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:37,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-10-15 19:39:37,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-10-15 19:39:37,366 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:39:37,367 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 72 transitions, 622 flow. Second operand has 47 states, 47 states have (on average 8.446808510638299) internal successors, (397), 47 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:37,367 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:37,367 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:39:37,367 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:37,599 INFO L129 PetriNetUnfolder]: 19/115 cut-off events. [2021-10-15 19:39:37,599 INFO L130 PetriNetUnfolder]: For 1178/1178 co-relation queries the response was YES. [2021-10-15 19:39:37,600 INFO L84 FinitePrefix]: Finished finitePrefix Result has 553 conditions, 115 events. 19/115 cut-off events. For 1178/1178 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 21 event pairs, 0 based on Foata normal form. 4/119 useless extension candidates. Maximal degree in co-relation 412. Up to 56 conditions per place. [2021-10-15 19:39:37,601 INFO L132 encePairwiseOnDemand]: 35/48 looper letters, 49 selfloop transitions, 63 changer transitions 0/115 dead transitions. [2021-10-15 19:39:37,601 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 115 transitions, 1027 flow [2021-10-15 19:39:37,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-10-15 19:39:37,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-10-15 19:39:37,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 398 transitions. [2021-10-15 19:39:37,605 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.17641843971631205 [2021-10-15 19:39:37,605 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 398 transitions. [2021-10-15 19:39:37,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 398 transitions. [2021-10-15 19:39:37,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:37,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 398 transitions. [2021-10-15 19:39:37,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 8.46808510638298) internal successors, (398), 47 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:37,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 48.0) internal successors, (2304), 48 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:37,610 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 48.0) internal successors, (2304), 48 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:37,611 INFO L186 Difference]: Start difference. First operand has 130 places, 72 transitions, 622 flow. Second operand 47 states and 398 transitions. [2021-10-15 19:39:37,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 115 transitions, 1027 flow [2021-10-15 19:39:37,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 115 transitions, 833 flow, removed 37 selfloop flow, removed 39 redundant places. [2021-10-15 19:39:37,626 INFO L242 Difference]: Finished difference. Result has 141 places, 79 transitions, 684 flow [2021-10-15 19:39:37,627 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=443, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=684, PETRI_PLACES=141, PETRI_TRANSITIONS=79} [2021-10-15 19:39:37,627 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 116 predicate places. [2021-10-15 19:39:37,627 INFO L470 AbstractCegarLoop]: Abstraction has has 141 places, 79 transitions, 684 flow [2021-10-15 19:39:37,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 8.446808510638299) internal successors, (397), 47 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:37,628 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:37,628 INFO L254 CegarLoopForPetriNet]: trace histogram [36, 19, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:37,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:37,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-15 19:39:37,851 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:37,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:37,851 INFO L82 PathProgramCache]: Analyzing trace with hash 319507632, now seen corresponding path program 19 times [2021-10-15 19:39:37,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:37,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19364451] [2021-10-15 19:39:37,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:37,852 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:37,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:38,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 660 proven. 380 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-10-15 19:39:38,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:38,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19364451] [2021-10-15 19:39:38,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19364451] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:38,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835529633] [2021-10-15 19:39:38,310 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-15 19:39:38,310 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:38,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:38,311 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:38,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-15 19:39:38,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:38,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-15 19:39:38,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:38,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 660 proven. 380 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-10-15 19:39:38,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835529633] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:38,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:39:38,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-10-15 19:39:38,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871604664] [2021-10-15 19:39:38,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-15 19:39:38,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:38,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-15 19:39:38,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-10-15 19:39:38,974 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:39:38,974 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 79 transitions, 684 flow. Second operand has 32 states, 32 states have (on average 8.03125) internal successors, (257), 32 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:38,974 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:38,974 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:39:38,975 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:39,109 INFO L129 PetriNetUnfolder]: 19/117 cut-off events. [2021-10-15 19:39:39,109 INFO L130 PetriNetUnfolder]: For 1069/1069 co-relation queries the response was YES. [2021-10-15 19:39:39,110 INFO L84 FinitePrefix]: Finished finitePrefix Result has 562 conditions, 117 events. 19/117 cut-off events. For 1069/1069 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 20 event pairs, 0 based on Foata normal form. 1/118 useless extension candidates. Maximal degree in co-relation 460. Up to 57 conditions per place. [2021-10-15 19:39:39,111 INFO L132 encePairwiseOnDemand]: 36/48 looper letters, 67 selfloop transitions, 30 changer transitions 0/100 dead transitions. [2021-10-15 19:39:39,111 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 100 transitions, 960 flow [2021-10-15 19:39:39,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-15 19:39:39,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-15 19:39:39,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 250 transitions. [2021-10-15 19:39:39,113 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.16801075268817203 [2021-10-15 19:39:39,113 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 250 transitions. [2021-10-15 19:39:39,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 250 transitions. [2021-10-15 19:39:39,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:39,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 250 transitions. [2021-10-15 19:39:39,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 8.064516129032258) internal successors, (250), 31 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:39,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 48.0) internal successors, (1536), 32 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:39,117 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 48.0) internal successors, (1536), 32 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:39,117 INFO L186 Difference]: Start difference. First operand has 141 places, 79 transitions, 684 flow. Second operand 31 states and 250 transitions. [2021-10-15 19:39:39,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 100 transitions, 960 flow [2021-10-15 19:39:39,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 100 transitions, 772 flow, removed 35 selfloop flow, removed 42 redundant places. [2021-10-15 19:39:39,132 INFO L242 Difference]: Finished difference. Result has 130 places, 80 transitions, 604 flow [2021-10-15 19:39:39,132 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=496, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=604, PETRI_PLACES=130, PETRI_TRANSITIONS=80} [2021-10-15 19:39:39,133 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 105 predicate places. [2021-10-15 19:39:39,133 INFO L470 AbstractCegarLoop]: Abstraction has has 130 places, 80 transitions, 604 flow [2021-10-15 19:39:39,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 8.03125) internal successors, (257), 32 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:39,133 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:39,133 INFO L254 CegarLoopForPetriNet]: trace histogram [37, 20, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:39,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:39,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-15 19:39:39,352 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:39,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:39,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1493173197, now seen corresponding path program 20 times [2021-10-15 19:39:39,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:39,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114515848] [2021-10-15 19:39:39,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:39,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:39,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:39,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 693 proven. 420 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-10-15 19:39:39,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:39,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114515848] [2021-10-15 19:39:39,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114515848] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:39,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904746514] [2021-10-15 19:39:39,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:39:39,807 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:39,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:39,809 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:39,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-15 19:39:40,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:39:40,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:39:40,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-15 19:39:40,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:40,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 693 proven. 420 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-10-15 19:39:40,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904746514] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:40,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:39:40,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-10-15 19:39:40,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176300652] [2021-10-15 19:39:40,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-15 19:39:40,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:40,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-15 19:39:40,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-10-15 19:39:40,503 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:39:40,504 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 80 transitions, 604 flow. Second operand has 33 states, 33 states have (on average 8.030303030303031) internal successors, (265), 33 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:40,504 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:40,504 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:39:40,504 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:40,616 INFO L129 PetriNetUnfolder]: 19/119 cut-off events. [2021-10-15 19:39:40,616 INFO L130 PetriNetUnfolder]: For 1066/1066 co-relation queries the response was YES. [2021-10-15 19:39:40,617 INFO L84 FinitePrefix]: Finished finitePrefix Result has 527 conditions, 119 events. 19/119 cut-off events. For 1066/1066 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 20 event pairs, 0 based on Foata normal form. 1/120 useless extension candidates. Maximal degree in co-relation 437. Up to 58 conditions per place. [2021-10-15 19:39:40,618 INFO L132 encePairwiseOnDemand]: 36/48 looper letters, 68 selfloop transitions, 31 changer transitions 0/102 dead transitions. [2021-10-15 19:39:40,618 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 102 transitions, 888 flow [2021-10-15 19:39:40,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-15 19:39:40,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-10-15 19:39:40,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 258 transitions. [2021-10-15 19:39:40,621 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.16796875 [2021-10-15 19:39:40,621 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 258 transitions. [2021-10-15 19:39:40,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 258 transitions. [2021-10-15 19:39:40,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:40,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 258 transitions. [2021-10-15 19:39:40,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 8.0625) internal successors, (258), 32 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) [2021-10-15 19:39:40,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 48.0) internal successors, (1584), 33 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:40,625 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 48.0) internal successors, (1584), 33 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:40,625 INFO L186 Difference]: Start difference. First operand has 130 places, 80 transitions, 604 flow. Second operand 32 states and 258 transitions. [2021-10-15 19:39:40,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 102 transitions, 888 flow [2021-10-15 19:39:40,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 102 transitions, 790 flow, removed 20 selfloop flow, removed 29 redundant places. [2021-10-15 19:39:40,639 INFO L242 Difference]: Finished difference. Result has 133 places, 81 transitions, 618 flow [2021-10-15 19:39:40,639 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=618, PETRI_PLACES=133, PETRI_TRANSITIONS=81} [2021-10-15 19:39:40,640 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 108 predicate places. [2021-10-15 19:39:40,640 INFO L470 AbstractCegarLoop]: Abstraction has has 133 places, 81 transitions, 618 flow [2021-10-15 19:39:40,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 8.030303030303031) internal successors, (265), 33 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:40,640 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:40,640 INFO L254 CegarLoopForPetriNet]: trace histogram [38, 21, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:40,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:40,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-15 19:39:40,867 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:40,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:40,867 INFO L82 PathProgramCache]: Analyzing trace with hash -190617686, now seen corresponding path program 21 times [2021-10-15 19:39:40,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:40,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302724669] [2021-10-15 19:39:40,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:40,868 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:40,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:41,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 726 proven. 462 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-10-15 19:39:41,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:41,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302724669] [2021-10-15 19:39:41,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302724669] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:41,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732326460] [2021-10-15 19:39:41,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:39:41,315 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:41,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:41,316 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:41,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-15 19:39:41,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2021-10-15 19:39:41,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:39:41,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-15 19:39:41,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:42,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 735 proven. 289 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-10-15 19:39:42,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732326460] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:42,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:39:42,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 20] total 51 [2021-10-15 19:39:42,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024870145] [2021-10-15 19:39:42,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-15 19:39:42,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:42,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-15 19:39:42,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-10-15 19:39:42,569 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:39:42,570 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 81 transitions, 618 flow. Second operand has 51 states, 51 states have (on average 8.411764705882353) internal successors, (429), 51 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:42,570 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:42,570 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:39:42,570 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:42,834 INFO L129 PetriNetUnfolder]: 20/124 cut-off events. [2021-10-15 19:39:42,834 INFO L130 PetriNetUnfolder]: For 1251/1251 co-relation queries the response was YES. [2021-10-15 19:39:42,835 INFO L84 FinitePrefix]: Finished finitePrefix Result has 552 conditions, 124 events. 20/124 cut-off events. For 1251/1251 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 22 event pairs, 0 based on Foata normal form. 2/126 useless extension candidates. Maximal degree in co-relation 448. Up to 61 conditions per place. [2021-10-15 19:39:42,836 INFO L132 encePairwiseOnDemand]: 35/48 looper letters, 53 selfloop transitions, 68 changer transitions 0/124 dead transitions. [2021-10-15 19:39:42,837 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 124 transitions, 1004 flow [2021-10-15 19:39:42,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-10-15 19:39:42,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-10-15 19:39:42,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 429 transitions. [2021-10-15 19:39:42,839 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.17524509803921567 [2021-10-15 19:39:42,839 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 429 transitions. [2021-10-15 19:39:42,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 429 transitions. [2021-10-15 19:39:42,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:42,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 429 transitions. [2021-10-15 19:39:42,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 8.411764705882353) internal successors, (429), 51 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:42,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 48.0) internal successors, (2496), 52 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:42,845 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 48.0) internal successors, (2496), 52 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:42,845 INFO L186 Difference]: Start difference. First operand has 133 places, 81 transitions, 618 flow. Second operand 51 states and 429 transitions. [2021-10-15 19:39:42,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 124 transitions, 1004 flow [2021-10-15 19:39:42,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 124 transitions, 902 flow, removed 21 selfloop flow, removed 30 redundant places. [2021-10-15 19:39:42,857 INFO L242 Difference]: Finished difference. Result has 155 places, 84 transitions, 727 flow [2021-10-15 19:39:42,858 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=516, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=727, PETRI_PLACES=155, PETRI_TRANSITIONS=84} [2021-10-15 19:39:42,858 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 130 predicate places. [2021-10-15 19:39:42,858 INFO L470 AbstractCegarLoop]: Abstraction has has 155 places, 84 transitions, 727 flow [2021-10-15 19:39:42,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 8.411764705882353) internal successors, (429), 51 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:42,859 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:42,859 INFO L254 CegarLoopForPetriNet]: trace histogram [40, 22, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:42,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:43,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-15 19:39:43,087 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:43,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:43,087 INFO L82 PathProgramCache]: Analyzing trace with hash -363246719, now seen corresponding path program 22 times [2021-10-15 19:39:43,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:43,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331271253] [2021-10-15 19:39:43,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:43,088 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:43,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:43,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 805 proven. 506 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-10-15 19:39:43,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:43,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331271253] [2021-10-15 19:39:43,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331271253] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:43,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732311014] [2021-10-15 19:39:43,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 19:39:43,596 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:43,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:43,599 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:43,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-15 19:39:44,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 19:39:44,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:39:44,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-15 19:39:44,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:44,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 805 proven. 506 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-10-15 19:39:44,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732311014] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:44,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:39:44,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-10-15 19:39:44,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36420657] [2021-10-15 19:39:44,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-15 19:39:44,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:44,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-15 19:39:44,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-10-15 19:39:44,376 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:39:44,377 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 84 transitions, 727 flow. Second operand has 35 states, 35 states have (on average 8.028571428571428) internal successors, (281), 35 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:44,377 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:44,377 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:39:44,377 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:44,510 INFO L129 PetriNetUnfolder]: 20/126 cut-off events. [2021-10-15 19:39:44,510 INFO L130 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2021-10-15 19:39:44,511 INFO L84 FinitePrefix]: Finished finitePrefix Result has 604 conditions, 126 events. 20/126 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 21 event pairs, 0 based on Foata normal form. 1/127 useless extension candidates. Maximal degree in co-relation 501. Up to 62 conditions per place. [2021-10-15 19:39:44,512 INFO L132 encePairwiseOnDemand]: 36/48 looper letters, 72 selfloop transitions, 33 changer transitions 0/108 dead transitions. [2021-10-15 19:39:44,513 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 108 transitions, 1031 flow [2021-10-15 19:39:44,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-15 19:39:44,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-10-15 19:39:44,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 274 transitions. [2021-10-15 19:39:44,514 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.16789215686274508 [2021-10-15 19:39:44,515 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 274 transitions. [2021-10-15 19:39:44,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 274 transitions. [2021-10-15 19:39:44,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:44,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 274 transitions. [2021-10-15 19:39:44,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 8.058823529411764) internal successors, (274), 34 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:44,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 48.0) internal successors, (1680), 35 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:44,519 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 48.0) internal successors, (1680), 35 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:44,519 INFO L186 Difference]: Start difference. First operand has 155 places, 84 transitions, 727 flow. Second operand 34 states and 274 transitions. [2021-10-15 19:39:44,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 108 transitions, 1031 flow [2021-10-15 19:39:44,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 108 transitions, 849 flow, removed 27 selfloop flow, removed 47 redundant places. [2021-10-15 19:39:44,533 INFO L242 Difference]: Finished difference. Result has 142 places, 85 transitions, 665 flow [2021-10-15 19:39:44,534 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=545, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=665, PETRI_PLACES=142, PETRI_TRANSITIONS=85} [2021-10-15 19:39:44,534 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 117 predicate places. [2021-10-15 19:39:44,534 INFO L470 AbstractCegarLoop]: Abstraction has has 142 places, 85 transitions, 665 flow [2021-10-15 19:39:44,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 8.028571428571428) internal successors, (281), 35 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:44,535 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:44,535 INFO L254 CegarLoopForPetriNet]: trace histogram [41, 23, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:44,570 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-10-15 19:39:44,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:44,752 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:44,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:44,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1285057122, now seen corresponding path program 23 times [2021-10-15 19:39:44,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:44,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395406038] [2021-10-15 19:39:44,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:44,753 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:44,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:45,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 840 proven. 552 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-10-15 19:39:45,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:45,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395406038] [2021-10-15 19:39:45,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395406038] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:45,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196624917] [2021-10-15 19:39:45,225 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-15 19:39:45,225 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:45,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:45,226 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:45,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-15 19:39:45,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-10-15 19:39:45,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:39:45,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-15 19:39:45,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:46,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 400 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-10-15 19:39:46,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196624917] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:46,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:39:46,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 23] total 56 [2021-10-15 19:39:46,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056397678] [2021-10-15 19:39:46,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-10-15 19:39:46,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:46,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-10-15 19:39:46,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2021-10-15 19:39:46,616 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:39:46,617 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 85 transitions, 665 flow. Second operand has 56 states, 56 states have (on average 8.375) internal successors, (469), 56 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:46,617 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:46,617 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:39:46,617 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:46,881 INFO L129 PetriNetUnfolder]: 23/137 cut-off events. [2021-10-15 19:39:46,882 INFO L130 PetriNetUnfolder]: For 1654/1654 co-relation queries the response was YES. [2021-10-15 19:39:46,883 INFO L84 FinitePrefix]: Finished finitePrefix Result has 620 conditions, 137 events. 23/137 cut-off events. For 1654/1654 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 24 event pairs, 0 based on Foata normal form. 4/141 useless extension candidates. Maximal degree in co-relation 480. Up to 69 conditions per place. [2021-10-15 19:39:46,884 INFO L132 encePairwiseOnDemand]: 35/48 looper letters, 58 selfloop transitions, 76 changer transitions 0/137 dead transitions. [2021-10-15 19:39:46,884 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 137 transitions, 1136 flow [2021-10-15 19:39:46,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-10-15 19:39:46,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-10-15 19:39:46,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 474 transitions. [2021-10-15 19:39:46,888 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.17633928571428573 [2021-10-15 19:39:46,888 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 474 transitions. [2021-10-15 19:39:46,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 474 transitions. [2021-10-15 19:39:46,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:46,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 474 transitions. [2021-10-15 19:39:46,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 8.464285714285714) internal successors, (474), 56 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:46,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 48.0) internal successors, (2736), 57 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:46,894 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 48.0) internal successors, (2736), 57 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:46,894 INFO L186 Difference]: Start difference. First operand has 142 places, 85 transitions, 665 flow. Second operand 56 states and 474 transitions. [2021-10-15 19:39:46,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 137 transitions, 1136 flow [2021-10-15 19:39:46,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 137 transitions, 1026 flow, removed 23 selfloop flow, removed 32 redundant places. [2021-10-15 19:39:46,911 INFO L242 Difference]: Finished difference. Result has 169 places, 92 transitions, 841 flow [2021-10-15 19:39:46,911 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=555, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=841, PETRI_PLACES=169, PETRI_TRANSITIONS=92} [2021-10-15 19:39:46,911 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 144 predicate places. [2021-10-15 19:39:46,911 INFO L470 AbstractCegarLoop]: Abstraction has has 169 places, 92 transitions, 841 flow [2021-10-15 19:39:46,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 8.375) internal successors, (469), 56 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:46,912 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:46,912 INFO L254 CegarLoopForPetriNet]: trace histogram [45, 24, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:46,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-10-15 19:39:47,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:47,135 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:47,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:47,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1116419159, now seen corresponding path program 24 times [2021-10-15 19:39:47,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:47,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420959766] [2021-10-15 19:39:47,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:47,136 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:47,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:47,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1025 proven. 600 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-10-15 19:39:47,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:47,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420959766] [2021-10-15 19:39:47,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420959766] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:47,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130034113] [2021-10-15 19:39:47,705 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-15 19:39:47,705 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:47,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:47,706 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:47,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-15 19:39:48,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 45 check-sat command(s) [2021-10-15 19:39:48,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:39:48,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-15 19:39:48,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:48,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1025 proven. 600 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-10-15 19:39:48,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130034113] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:48,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:39:48,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-10-15 19:39:48,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589154059] [2021-10-15 19:39:48,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-15 19:39:48,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:48,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-15 19:39:48,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-10-15 19:39:48,601 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:39:48,602 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 92 transitions, 841 flow. Second operand has 37 states, 37 states have (on average 8.027027027027026) internal successors, (297), 37 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:48,602 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:48,602 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:39:48,602 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:48,740 INFO L129 PetriNetUnfolder]: 23/139 cut-off events. [2021-10-15 19:39:48,740 INFO L130 PetriNetUnfolder]: For 1618/1618 co-relation queries the response was YES. [2021-10-15 19:39:48,741 INFO L84 FinitePrefix]: Finished finitePrefix Result has 686 conditions, 139 events. 23/139 cut-off events. For 1618/1618 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 24 event pairs, 0 based on Foata normal form. 1/140 useless extension candidates. Maximal degree in co-relation 567. Up to 70 conditions per place. [2021-10-15 19:39:48,742 INFO L132 encePairwiseOnDemand]: 36/48 looper letters, 80 selfloop transitions, 35 changer transitions 0/118 dead transitions. [2021-10-15 19:39:48,742 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 118 transitions, 1173 flow [2021-10-15 19:39:48,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-15 19:39:48,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-10-15 19:39:48,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 290 transitions. [2021-10-15 19:39:48,748 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.16782407407407407 [2021-10-15 19:39:48,748 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 290 transitions. [2021-10-15 19:39:48,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 290 transitions. [2021-10-15 19:39:48,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:48,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 290 transitions. [2021-10-15 19:39:48,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 8.055555555555555) internal successors, (290), 36 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:48,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 48.0) internal successors, (1776), 37 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:48,752 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 48.0) internal successors, (1776), 37 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:48,752 INFO L186 Difference]: Start difference. First operand has 169 places, 92 transitions, 841 flow. Second operand 36 states and 290 transitions. [2021-10-15 19:39:48,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 118 transitions, 1173 flow [2021-10-15 19:39:48,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 118 transitions, 936 flow, removed 43 selfloop flow, removed 52 redundant places. [2021-10-15 19:39:48,771 INFO L242 Difference]: Finished difference. Result has 153 places, 93 transitions, 732 flow [2021-10-15 19:39:48,771 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=604, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=732, PETRI_PLACES=153, PETRI_TRANSITIONS=93} [2021-10-15 19:39:48,772 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 128 predicate places. [2021-10-15 19:39:48,772 INFO L470 AbstractCegarLoop]: Abstraction has has 153 places, 93 transitions, 732 flow [2021-10-15 19:39:48,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 8.027027027027026) internal successors, (297), 37 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:48,772 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:48,772 INFO L254 CegarLoopForPetriNet]: trace histogram [46, 25, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:48,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:48,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:48,987 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:48,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:48,987 INFO L82 PathProgramCache]: Analyzing trace with hash 110548358, now seen corresponding path program 25 times [2021-10-15 19:39:48,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:48,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63609271] [2021-10-15 19:39:48,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:48,988 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:49,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:49,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1066 proven. 650 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-10-15 19:39:49,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:49,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63609271] [2021-10-15 19:39:49,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63609271] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:49,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412311795] [2021-10-15 19:39:49,602 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-15 19:39:49,602 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:49,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:49,607 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:49,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-15 19:39:50,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:50,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-15 19:39:50,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:50,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1066 proven. 650 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-10-15 19:39:50,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412311795] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:50,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:39:50,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-10-15 19:39:50,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241723118] [2021-10-15 19:39:50,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-15 19:39:50,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:50,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-15 19:39:50,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-10-15 19:39:50,455 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:39:50,455 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 93 transitions, 732 flow. Second operand has 38 states, 38 states have (on average 8.026315789473685) internal successors, (305), 38 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:50,455 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:50,456 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:39:50,456 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:50,595 INFO L129 PetriNetUnfolder]: 23/141 cut-off events. [2021-10-15 19:39:50,596 INFO L130 PetriNetUnfolder]: For 1605/1605 co-relation queries the response was YES. [2021-10-15 19:39:50,596 INFO L84 FinitePrefix]: Finished finitePrefix Result has 638 conditions, 141 events. 23/141 cut-off events. For 1605/1605 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 24 event pairs, 0 based on Foata normal form. 1/142 useless extension candidates. Maximal degree in co-relation 534. Up to 71 conditions per place. [2021-10-15 19:39:50,598 INFO L132 encePairwiseOnDemand]: 36/48 looper letters, 81 selfloop transitions, 36 changer transitions 0/120 dead transitions. [2021-10-15 19:39:50,598 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 120 transitions, 1072 flow [2021-10-15 19:39:50,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-15 19:39:50,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-10-15 19:39:50,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 298 transitions. [2021-10-15 19:39:50,606 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.1677927927927928 [2021-10-15 19:39:50,606 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 298 transitions. [2021-10-15 19:39:50,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 298 transitions. [2021-10-15 19:39:50,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:50,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 298 transitions. [2021-10-15 19:39:50,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 8.054054054054054) internal successors, (298), 37 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:50,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 48.0) internal successors, (1824), 38 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:50,611 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 48.0) internal successors, (1824), 38 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:50,611 INFO L186 Difference]: Start difference. First operand has 153 places, 93 transitions, 732 flow. Second operand 37 states and 298 transitions. [2021-10-15 19:39:50,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 120 transitions, 1072 flow [2021-10-15 19:39:50,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 120 transitions, 954 flow, removed 25 selfloop flow, removed 34 redundant places. [2021-10-15 19:39:50,629 INFO L242 Difference]: Finished difference. Result has 156 places, 94 transitions, 746 flow [2021-10-15 19:39:50,629 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=614, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=746, PETRI_PLACES=156, PETRI_TRANSITIONS=94} [2021-10-15 19:39:50,629 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 131 predicate places. [2021-10-15 19:39:50,630 INFO L470 AbstractCegarLoop]: Abstraction has has 156 places, 94 transitions, 746 flow [2021-10-15 19:39:50,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 8.026315789473685) internal successors, (305), 38 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:50,630 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:50,630 INFO L254 CegarLoopForPetriNet]: trace histogram [47, 26, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:50,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:50,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-10-15 19:39:50,847 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:50,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:50,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1889674205, now seen corresponding path program 26 times [2021-10-15 19:39:50,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:50,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679252050] [2021-10-15 19:39:50,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:50,848 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:50,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:51,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1107 proven. 702 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-10-15 19:39:51,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:51,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679252050] [2021-10-15 19:39:51,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679252050] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:51,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023662117] [2021-10-15 19:39:51,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:39:51,398 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:51,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:51,400 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:51,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-15 19:39:51,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:39:51,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:39:51,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-15 19:39:51,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:52,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1107 proven. 702 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-10-15 19:39:52,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023662117] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:52,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:39:52,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-10-15 19:39:52,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183929271] [2021-10-15 19:39:52,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-15 19:39:52,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:52,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-15 19:39:52,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-10-15 19:39:52,257 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:39:52,257 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 94 transitions, 746 flow. Second operand has 39 states, 39 states have (on average 8.025641025641026) internal successors, (313), 39 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:52,257 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:52,258 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:39:52,258 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:52,427 INFO L129 PetriNetUnfolder]: 23/143 cut-off events. [2021-10-15 19:39:52,427 INFO L130 PetriNetUnfolder]: For 1722/1722 co-relation queries the response was YES. [2021-10-15 19:39:52,427 INFO L84 FinitePrefix]: Finished finitePrefix Result has 650 conditions, 143 events. 23/143 cut-off events. For 1722/1722 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 24 event pairs, 0 based on Foata normal form. 1/144 useless extension candidates. Maximal degree in co-relation 545. Up to 72 conditions per place. [2021-10-15 19:39:52,428 INFO L132 encePairwiseOnDemand]: 36/48 looper letters, 82 selfloop transitions, 37 changer transitions 0/122 dead transitions. [2021-10-15 19:39:52,428 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 122 transitions, 1094 flow [2021-10-15 19:39:52,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-15 19:39:52,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-10-15 19:39:52,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 306 transitions. [2021-10-15 19:39:52,430 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.16776315789473684 [2021-10-15 19:39:52,430 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 306 transitions. [2021-10-15 19:39:52,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 306 transitions. [2021-10-15 19:39:52,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:52,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 306 transitions. [2021-10-15 19:39:52,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 8.052631578947368) internal successors, (306), 38 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:52,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 48.0) internal successors, (1872), 39 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:52,434 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 48.0) internal successors, (1872), 39 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:52,434 INFO L186 Difference]: Start difference. First operand has 156 places, 94 transitions, 746 flow. Second operand 38 states and 306 transitions. [2021-10-15 19:39:52,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 122 transitions, 1094 flow [2021-10-15 19:39:52,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 122 transitions, 972 flow, removed 26 selfloop flow, removed 35 redundant places. [2021-10-15 19:39:52,446 INFO L242 Difference]: Finished difference. Result has 159 places, 95 transitions, 760 flow [2021-10-15 19:39:52,447 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=760, PETRI_PLACES=159, PETRI_TRANSITIONS=95} [2021-10-15 19:39:52,447 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 134 predicate places. [2021-10-15 19:39:52,447 INFO L470 AbstractCegarLoop]: Abstraction has has 159 places, 95 transitions, 760 flow [2021-10-15 19:39:52,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 8.025641025641026) internal successors, (313), 39 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:52,448 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:52,448 INFO L254 CegarLoopForPetriNet]: trace histogram [48, 27, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:52,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:52,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-10-15 19:39:52,659 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:52,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:52,659 INFO L82 PathProgramCache]: Analyzing trace with hash 41791360, now seen corresponding path program 27 times [2021-10-15 19:39:52,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:52,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219251694] [2021-10-15 19:39:52,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:52,660 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:52,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:53,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1148 proven. 756 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-10-15 19:39:53,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:53,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219251694] [2021-10-15 19:39:53,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219251694] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:53,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961990934] [2021-10-15 19:39:53,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:39:53,336 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:53,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:53,337 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:53,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-15 19:39:53,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 44 check-sat command(s) [2021-10-15 19:39:53,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:39:53,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-15 19:39:53,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:54,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1161 proven. 441 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2021-10-15 19:39:54,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961990934] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:54,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:39:54,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 24] total 61 [2021-10-15 19:39:54,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195794640] [2021-10-15 19:39:54,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-10-15 19:39:54,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:54,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-10-15 19:39:54,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-10-15 19:39:54,935 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:39:54,935 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 95 transitions, 760 flow. Second operand has 61 states, 61 states have (on average 8.344262295081966) internal successors, (509), 61 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:54,935 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:54,935 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:39:54,935 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:55,242 INFO L129 PetriNetUnfolder]: 24/148 cut-off events. [2021-10-15 19:39:55,242 INFO L130 PetriNetUnfolder]: For 1980/1980 co-relation queries the response was YES. [2021-10-15 19:39:55,243 INFO L84 FinitePrefix]: Finished finitePrefix Result has 676 conditions, 148 events. 24/148 cut-off events. For 1980/1980 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 25 event pairs, 0 based on Foata normal form. 2/150 useless extension candidates. Maximal degree in co-relation 556. Up to 75 conditions per place. [2021-10-15 19:39:55,244 INFO L132 encePairwiseOnDemand]: 35/48 looper letters, 63 selfloop transitions, 82 changer transitions 0/148 dead transitions. [2021-10-15 19:39:55,244 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 148 transitions, 1228 flow [2021-10-15 19:39:55,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-10-15 19:39:55,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-10-15 19:39:55,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 513 transitions. [2021-10-15 19:39:55,247 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.17520491803278687 [2021-10-15 19:39:55,247 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 513 transitions. [2021-10-15 19:39:55,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 513 transitions. [2021-10-15 19:39:55,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:55,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 513 transitions. [2021-10-15 19:39:55,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 8.40983606557377) internal successors, (513), 61 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:55,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 48.0) internal successors, (2976), 62 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:55,253 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 48.0) internal successors, (2976), 62 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:55,253 INFO L186 Difference]: Start difference. First operand has 159 places, 95 transitions, 760 flow. Second operand 61 states and 513 transitions. [2021-10-15 19:39:55,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 148 transitions, 1228 flow [2021-10-15 19:39:55,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 148 transitions, 1102 flow, removed 27 selfloop flow, removed 36 redundant places. [2021-10-15 19:39:55,275 INFO L242 Difference]: Finished difference. Result has 185 places, 98 transitions, 887 flow [2021-10-15 19:39:55,275 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=634, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=887, PETRI_PLACES=185, PETRI_TRANSITIONS=98} [2021-10-15 19:39:55,276 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 160 predicate places. [2021-10-15 19:39:55,276 INFO L470 AbstractCegarLoop]: Abstraction has has 185 places, 98 transitions, 887 flow [2021-10-15 19:39:55,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 8.344262295081966) internal successors, (509), 61 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:55,277 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:55,277 INFO L254 CegarLoopForPetriNet]: trace histogram [50, 28, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:55,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:55,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-15 19:39:55,487 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:55,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:55,487 INFO L82 PathProgramCache]: Analyzing trace with hash -948329129, now seen corresponding path program 28 times [2021-10-15 19:39:55,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:55,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108249265] [2021-10-15 19:39:55,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:55,488 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:55,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:56,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1247 proven. 812 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-10-15 19:39:56,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:56,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108249265] [2021-10-15 19:39:56,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108249265] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:56,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911448130] [2021-10-15 19:39:56,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 19:39:56,106 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:56,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:56,108 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:56,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-15 19:39:56,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 19:39:56,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:39:56,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-15 19:39:56,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:57,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1247 proven. 812 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-10-15 19:39:57,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911448130] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:57,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:39:57,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-10-15 19:39:57,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336577281] [2021-10-15 19:39:57,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-10-15 19:39:57,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:57,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-10-15 19:39:57,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-10-15 19:39:57,055 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:39:57,055 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 98 transitions, 887 flow. Second operand has 41 states, 41 states have (on average 8.024390243902438) internal successors, (329), 41 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:57,055 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:57,056 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:39:57,056 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:57,210 INFO L129 PetriNetUnfolder]: 24/150 cut-off events. [2021-10-15 19:39:57,210 INFO L130 PetriNetUnfolder]: For 2014/2014 co-relation queries the response was YES. [2021-10-15 19:39:57,211 INFO L84 FinitePrefix]: Finished finitePrefix Result has 736 conditions, 150 events. 24/150 cut-off events. For 2014/2014 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 25 event pairs, 0 based on Foata normal form. 1/151 useless extension candidates. Maximal degree in co-relation 617. Up to 76 conditions per place. [2021-10-15 19:39:57,212 INFO L132 encePairwiseOnDemand]: 36/48 looper letters, 86 selfloop transitions, 39 changer transitions 0/128 dead transitions. [2021-10-15 19:39:57,213 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 128 transitions, 1255 flow [2021-10-15 19:39:57,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-15 19:39:57,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-10-15 19:39:57,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 322 transitions. [2021-10-15 19:39:57,224 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.16770833333333332 [2021-10-15 19:39:57,224 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 322 transitions. [2021-10-15 19:39:57,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 322 transitions. [2021-10-15 19:39:57,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:57,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 322 transitions. [2021-10-15 19:39:57,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 8.05) internal successors, (322), 40 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:57,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 48.0) internal successors, (1968), 41 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:57,229 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 48.0) internal successors, (1968), 41 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:57,229 INFO L186 Difference]: Start difference. First operand has 185 places, 98 transitions, 887 flow. Second operand 40 states and 322 transitions. [2021-10-15 19:39:57,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 128 transitions, 1255 flow [2021-10-15 19:39:57,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 128 transitions, 1031 flow, removed 34 selfloop flow, removed 57 redundant places. [2021-10-15 19:39:57,252 INFO L242 Difference]: Finished difference. Result has 168 places, 99 transitions, 807 flow [2021-10-15 19:39:57,252 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=663, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=807, PETRI_PLACES=168, PETRI_TRANSITIONS=99} [2021-10-15 19:39:57,252 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 143 predicate places. [2021-10-15 19:39:57,253 INFO L470 AbstractCegarLoop]: Abstraction has has 168 places, 99 transitions, 807 flow [2021-10-15 19:39:57,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 8.024390243902438) internal successors, (329), 41 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:57,253 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:57,253 INFO L254 CegarLoopForPetriNet]: trace histogram [51, 29, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:57,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-10-15 19:39:57,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:57,467 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:57,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:57,467 INFO L82 PathProgramCache]: Analyzing trace with hash 567459572, now seen corresponding path program 29 times [2021-10-15 19:39:57,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:57,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211509753] [2021-10-15 19:39:57,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:57,468 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:57,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:58,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1290 proven. 870 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-10-15 19:39:58,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:58,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211509753] [2021-10-15 19:39:58,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211509753] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:58,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145017774] [2021-10-15 19:39:58,068 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-15 19:39:58,068 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:58,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:58,068 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:58,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-15 19:39:58,715 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2021-10-15 19:39:58,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:39:58,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-15 19:39:58,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:59,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 625 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2021-10-15 19:39:59,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145017774] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:59,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:39:59,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 28] total 67 [2021-10-15 19:39:59,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839812946] [2021-10-15 19:39:59,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-10-15 19:39:59,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:59,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-10-15 19:39:59,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-10-15 19:39:59,853 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:39:59,854 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 99 transitions, 807 flow. Second operand has 67 states, 67 states have (on average 8.313432835820896) internal successors, (557), 67 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:59,854 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:59,854 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:39:59,854 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:40:00,207 INFO L129 PetriNetUnfolder]: 28/164 cut-off events. [2021-10-15 19:40:00,207 INFO L130 PetriNetUnfolder]: For 2673/2673 co-relation queries the response was YES. [2021-10-15 19:40:00,207 INFO L84 FinitePrefix]: Finished finitePrefix Result has 761 conditions, 164 events. 28/164 cut-off events. For 2673/2673 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 29 event pairs, 0 based on Foata normal form. 5/169 useless extension candidates. Maximal degree in co-relation 588. Up to 85 conditions per place. [2021-10-15 19:40:00,209 INFO L132 encePairwiseOnDemand]: 35/48 looper letters, 69 selfloop transitions, 92 changer transitions 0/164 dead transitions. [2021-10-15 19:40:00,209 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 164 transitions, 1395 flow [2021-10-15 19:40:00,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-10-15 19:40:00,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-10-15 19:40:00,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 568 transitions. [2021-10-15 19:40:00,211 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.17661691542288557 [2021-10-15 19:40:00,211 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 568 transitions. [2021-10-15 19:40:00,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 568 transitions. [2021-10-15 19:40:00,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:40:00,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 568 transitions. [2021-10-15 19:40:00,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 8.477611940298507) internal successors, (568), 67 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:00,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 48.0) internal successors, (3264), 68 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:00,218 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 48.0) internal successors, (3264), 68 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:00,218 INFO L186 Difference]: Start difference. First operand has 168 places, 99 transitions, 807 flow. Second operand 67 states and 568 transitions. [2021-10-15 19:40:00,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 164 transitions, 1395 flow [2021-10-15 19:40:00,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 164 transitions, 1261 flow, removed 29 selfloop flow, removed 38 redundant places. [2021-10-15 19:40:00,242 INFO L242 Difference]: Finished difference. Result has 201 places, 108 transitions, 1037 flow [2021-10-15 19:40:00,243 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=673, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=1037, PETRI_PLACES=201, PETRI_TRANSITIONS=108} [2021-10-15 19:40:00,243 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 176 predicate places. [2021-10-15 19:40:00,243 INFO L470 AbstractCegarLoop]: Abstraction has has 201 places, 108 transitions, 1037 flow [2021-10-15 19:40:00,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 8.313432835820896) internal successors, (557), 67 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:00,244 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:40:00,244 INFO L254 CegarLoopForPetriNet]: trace histogram [56, 30, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:40:00,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-15 19:40:00,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-10-15 19:40:00,459 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:40:00,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:40:00,459 INFO L82 PathProgramCache]: Analyzing trace with hash 651845945, now seen corresponding path program 30 times [2021-10-15 19:40:00,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:40:00,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017795756] [2021-10-15 19:40:00,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:40:00,460 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:40:00,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:40:01,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1581 proven. 930 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2021-10-15 19:40:01,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:40:01,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017795756] [2021-10-15 19:40:01,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017795756] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:01,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754131697] [2021-10-15 19:40:01,136 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-15 19:40:01,136 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:40:01,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:40:01,138 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:40:01,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-15 19:40:01,852 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 56 check-sat command(s) [2021-10-15 19:40:01,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:40:01,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-15 19:40:01,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:40:03,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 784 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2021-10-15 19:40:03,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754131697] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:03,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:40:03,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 31] total 71 [2021-10-15 19:40:03,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321749604] [2021-10-15 19:40:03,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-10-15 19:40:03,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:40:03,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-10-15 19:40:03,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2021-10-15 19:40:03,236 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:40:03,236 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 108 transitions, 1037 flow. Second operand has 71 states, 71 states have (on average 8.295774647887324) internal successors, (589), 71 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:03,237 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:40:03,237 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:40:03,237 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:40:03,642 INFO L129 PetriNetUnfolder]: 31/175 cut-off events. [2021-10-15 19:40:03,642 INFO L130 PetriNetUnfolder]: For 3121/3121 co-relation queries the response was YES. [2021-10-15 19:40:03,644 INFO L84 FinitePrefix]: Finished finitePrefix Result has 892 conditions, 175 events. 31/175 cut-off events. For 3121/3121 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 33 event pairs, 0 based on Foata normal form. 4/179 useless extension candidates. Maximal degree in co-relation 703. Up to 92 conditions per place. [2021-10-15 19:40:03,645 INFO L132 encePairwiseOnDemand]: 35/48 looper letters, 73 selfloop transitions, 99 changer transitions 0/175 dead transitions. [2021-10-15 19:40:03,645 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 175 transitions, 1646 flow [2021-10-15 19:40:03,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-10-15 19:40:03,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-10-15 19:40:03,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 602 transitions. [2021-10-15 19:40:03,648 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.1766431924882629 [2021-10-15 19:40:03,648 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 602 transitions. [2021-10-15 19:40:03,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 602 transitions. [2021-10-15 19:40:03,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:40:03,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 602 transitions. [2021-10-15 19:40:03,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 8.47887323943662) internal successors, (602), 71 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:03,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 48.0) internal successors, (3456), 72 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:03,655 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 48.0) internal successors, (3456), 72 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:03,656 INFO L186 Difference]: Start difference. First operand has 201 places, 108 transitions, 1037 flow. Second operand 71 states and 602 transitions. [2021-10-15 19:40:03,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 175 transitions, 1646 flow [2021-10-15 19:40:03,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 175 transitions, 1331 flow, removed 62 selfloop flow, removed 62 redundant places. [2021-10-15 19:40:03,688 INFO L242 Difference]: Finished difference. Result has 213 places, 115 transitions, 1086 flow [2021-10-15 19:40:03,688 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=1086, PETRI_PLACES=213, PETRI_TRANSITIONS=115} [2021-10-15 19:40:03,688 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 188 predicate places. [2021-10-15 19:40:03,688 INFO L470 AbstractCegarLoop]: Abstraction has has 213 places, 115 transitions, 1086 flow [2021-10-15 19:40:03,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 8.295774647887324) internal successors, (589), 71 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:03,689 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:40:03,689 INFO L254 CegarLoopForPetriNet]: trace histogram [60, 31, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:40:03,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-15 19:40:03,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-15 19:40:03,903 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:40:03,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:40:03,903 INFO L82 PathProgramCache]: Analyzing trace with hash 403121732, now seen corresponding path program 31 times [2021-10-15 19:40:03,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:40:03,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763684300] [2021-10-15 19:40:03,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:40:03,904 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:40:03,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:40:04,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1824 proven. 992 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2021-10-15 19:40:04,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:40:04,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763684300] [2021-10-15 19:40:04,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763684300] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:04,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710805312] [2021-10-15 19:40:04,615 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-15 19:40:04,615 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:40:04,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:40:04,616 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:40:04,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-15 19:40:05,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:40:05,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-15 19:40:05,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:40:05,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1824 proven. 992 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2021-10-15 19:40:05,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710805312] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:05,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:40:05,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2021-10-15 19:40:05,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690082403] [2021-10-15 19:40:05,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-10-15 19:40:05,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:40:05,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-10-15 19:40:05,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-10-15 19:40:05,652 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:40:05,652 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 115 transitions, 1086 flow. Second operand has 44 states, 44 states have (on average 8.022727272727273) internal successors, (353), 44 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:05,653 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:40:05,653 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:40:05,653 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:40:05,796 INFO L129 PetriNetUnfolder]: 31/177 cut-off events. [2021-10-15 19:40:05,796 INFO L130 PetriNetUnfolder]: For 2568/2568 co-relation queries the response was YES. [2021-10-15 19:40:05,797 INFO L84 FinitePrefix]: Finished finitePrefix Result has 889 conditions, 177 events. 31/177 cut-off events. For 2568/2568 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 32 event pairs, 0 based on Foata normal form. 1/178 useless extension candidates. Maximal degree in co-relation 745. Up to 93 conditions per place. [2021-10-15 19:40:05,798 INFO L132 encePairwiseOnDemand]: 36/48 looper letters, 103 selfloop transitions, 42 changer transitions 0/148 dead transitions. [2021-10-15 19:40:05,798 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 148 transitions, 1506 flow [2021-10-15 19:40:05,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-10-15 19:40:05,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-10-15 19:40:05,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 346 transitions. [2021-10-15 19:40:05,800 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.16763565891472867 [2021-10-15 19:40:05,800 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 346 transitions. [2021-10-15 19:40:05,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 346 transitions. [2021-10-15 19:40:05,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:40:05,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 346 transitions. [2021-10-15 19:40:05,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 8.046511627906977) internal successors, (346), 43 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:05,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 48.0) internal successors, (2112), 44 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:05,803 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 48.0) internal successors, (2112), 44 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:05,803 INFO L186 Difference]: Start difference. First operand has 213 places, 115 transitions, 1086 flow. Second operand 43 states and 346 transitions. [2021-10-15 19:40:05,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 148 transitions, 1506 flow [2021-10-15 19:40:05,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 148 transitions, 1210 flow, removed 53 selfloop flow, removed 66 redundant places. [2021-10-15 19:40:05,824 INFO L242 Difference]: Finished difference. Result has 190 places, 116 transitions, 946 flow [2021-10-15 19:40:05,824 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=790, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=946, PETRI_PLACES=190, PETRI_TRANSITIONS=116} [2021-10-15 19:40:05,824 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 165 predicate places. [2021-10-15 19:40:05,824 INFO L470 AbstractCegarLoop]: Abstraction has has 190 places, 116 transitions, 946 flow [2021-10-15 19:40:05,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 8.022727272727273) internal successors, (353), 44 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:05,825 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:40:05,825 INFO L254 CegarLoopForPetriNet]: trace histogram [61, 32, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:40:05,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-10-15 19:40:06,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:40:06,026 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:40:06,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:40:06,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1973964641, now seen corresponding path program 32 times [2021-10-15 19:40:06,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:40:06,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505732165] [2021-10-15 19:40:06,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:40:06,026 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:40:06,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:40:06,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1881 proven. 1056 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2021-10-15 19:40:06,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:40:06,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505732165] [2021-10-15 19:40:06,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505732165] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:06,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200343390] [2021-10-15 19:40:06,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:40:06,876 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:40:06,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:40:06,877 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:40:06,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-15 19:40:07,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:40:07,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:40:07,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-15 19:40:07,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:40:08,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1881 proven. 1056 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2021-10-15 19:40:08,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200343390] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:08,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:40:08,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2021-10-15 19:40:08,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365106824] [2021-10-15 19:40:08,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-10-15 19:40:08,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:40:08,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-10-15 19:40:08,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-10-15 19:40:08,257 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:40:08,257 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 116 transitions, 946 flow. Second operand has 45 states, 45 states have (on average 8.022222222222222) internal successors, (361), 45 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:08,257 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:40:08,257 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:40:08,258 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:40:08,440 INFO L129 PetriNetUnfolder]: 31/179 cut-off events. [2021-10-15 19:40:08,441 INFO L130 PetriNetUnfolder]: For 2601/2601 co-relation queries the response was YES. [2021-10-15 19:40:08,442 INFO L84 FinitePrefix]: Finished finitePrefix Result has 824 conditions, 179 events. 31/179 cut-off events. For 2601/2601 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 32 event pairs, 0 based on Foata normal form. 1/180 useless extension candidates. Maximal degree in co-relation 696. Up to 94 conditions per place. [2021-10-15 19:40:08,443 INFO L132 encePairwiseOnDemand]: 36/48 looper letters, 104 selfloop transitions, 43 changer transitions 0/150 dead transitions. [2021-10-15 19:40:08,443 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 150 transitions, 1374 flow [2021-10-15 19:40:08,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-15 19:40:08,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-10-15 19:40:08,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 354 transitions. [2021-10-15 19:40:08,450 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.16761363636363635 [2021-10-15 19:40:08,450 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 354 transitions. [2021-10-15 19:40:08,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 354 transitions. [2021-10-15 19:40:08,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:40:08,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 354 transitions. [2021-10-15 19:40:08,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 8.045454545454545) internal successors, (354), 44 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:08,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 48.0) internal successors, (2160), 45 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:08,455 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 48.0) internal successors, (2160), 45 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:08,455 INFO L186 Difference]: Start difference. First operand has 190 places, 116 transitions, 946 flow. Second operand 44 states and 354 transitions. [2021-10-15 19:40:08,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 150 transitions, 1374 flow [2021-10-15 19:40:08,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 150 transitions, 1228 flow, removed 32 selfloop flow, removed 41 redundant places. [2021-10-15 19:40:08,483 INFO L242 Difference]: Finished difference. Result has 193 places, 117 transitions, 960 flow [2021-10-15 19:40:08,484 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=960, PETRI_PLACES=193, PETRI_TRANSITIONS=117} [2021-10-15 19:40:08,484 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 168 predicate places. [2021-10-15 19:40:08,484 INFO L470 AbstractCegarLoop]: Abstraction has has 193 places, 117 transitions, 960 flow [2021-10-15 19:40:08,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 8.022222222222222) internal successors, (361), 45 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:08,484 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:40:08,484 INFO L254 CegarLoopForPetriNet]: trace histogram [62, 33, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:40:08,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-10-15 19:40:08,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-15 19:40:08,685 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:40:08,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:40:08,685 INFO L82 PathProgramCache]: Analyzing trace with hash -274488002, now seen corresponding path program 33 times [2021-10-15 19:40:08,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:40:08,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21969217] [2021-10-15 19:40:08,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:40:08,685 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:40:08,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:40:09,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 1938 proven. 1122 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2021-10-15 19:40:09,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:40:09,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21969217] [2021-10-15 19:40:09,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21969217] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:09,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173142638] [2021-10-15 19:40:09,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:40:09,623 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:40:09,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:40:09,624 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:40:09,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-15 19:40:10,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2021-10-15 19:40:10,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:40:10,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-15 19:40:10,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:40:12,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 1947 proven. 841 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2021-10-15 19:40:12,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173142638] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:12,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:40:12,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 32] total 75 [2021-10-15 19:40:12,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523446293] [2021-10-15 19:40:12,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-10-15 19:40:12,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:40:12,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-10-15 19:40:12,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2021-10-15 19:40:12,051 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:40:12,051 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 117 transitions, 960 flow. Second operand has 75 states, 75 states have (on average 8.28) internal successors, (621), 75 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:12,051 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:40:12,051 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:40:12,052 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:40:12,468 INFO L129 PetriNetUnfolder]: 32/184 cut-off events. [2021-10-15 19:40:12,468 INFO L130 PetriNetUnfolder]: For 3022/3022 co-relation queries the response was YES. [2021-10-15 19:40:12,469 INFO L84 FinitePrefix]: Finished finitePrefix Result has 851 conditions, 184 events. 32/184 cut-off events. For 3022/3022 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 34 event pairs, 0 based on Foata normal form. 2/186 useless extension candidates. Maximal degree in co-relation 707. Up to 97 conditions per place. [2021-10-15 19:40:12,471 INFO L132 encePairwiseOnDemand]: 35/48 looper letters, 77 selfloop transitions, 104 changer transitions 0/184 dead transitions. [2021-10-15 19:40:12,471 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 184 transitions, 1542 flow [2021-10-15 19:40:12,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-10-15 19:40:12,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-10-15 19:40:12,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 633 transitions. [2021-10-15 19:40:12,482 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.17583333333333334 [2021-10-15 19:40:12,482 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 633 transitions. [2021-10-15 19:40:12,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 633 transitions. [2021-10-15 19:40:12,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:40:12,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 633 transitions. [2021-10-15 19:40:12,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 8.44) internal successors, (633), 75 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:12,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 48.0) internal successors, (3648), 76 states have internal predecessors, (3648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:12,489 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 48.0) internal successors, (3648), 76 states have internal predecessors, (3648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:12,489 INFO L186 Difference]: Start difference. First operand has 193 places, 117 transitions, 960 flow. Second operand 75 states and 633 transitions. [2021-10-15 19:40:12,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 184 transitions, 1542 flow [2021-10-15 19:40:12,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 184 transitions, 1392 flow, removed 33 selfloop flow, removed 42 redundant places. [2021-10-15 19:40:12,517 INFO L242 Difference]: Finished difference. Result has 227 places, 120 transitions, 1121 flow [2021-10-15 19:40:12,517 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=1121, PETRI_PLACES=227, PETRI_TRANSITIONS=120} [2021-10-15 19:40:12,517 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 202 predicate places. [2021-10-15 19:40:12,517 INFO L470 AbstractCegarLoop]: Abstraction has has 227 places, 120 transitions, 1121 flow [2021-10-15 19:40:12,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 8.28) internal successors, (621), 75 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:12,517 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:40:12,518 INFO L254 CegarLoopForPetriNet]: trace histogram [64, 34, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:40:12,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-10-15 19:40:12,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:40:12,718 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:40:12,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:40:12,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1397712405, now seen corresponding path program 34 times [2021-10-15 19:40:12,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:40:12,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572549508] [2021-10-15 19:40:12,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:40:12,719 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:40:12,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:40:13,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 2065 proven. 1190 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2021-10-15 19:40:13,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:40:13,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572549508] [2021-10-15 19:40:13,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572549508] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:13,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123308852] [2021-10-15 19:40:13,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 19:40:13,616 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:40:13,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:40:13,617 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:40:13,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-15 19:40:14,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 19:40:14,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:40:14,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-15 19:40:14,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:40:14,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 2065 proven. 1190 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2021-10-15 19:40:14,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123308852] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:14,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:40:14,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2021-10-15 19:40:14,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159907126] [2021-10-15 19:40:14,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-10-15 19:40:14,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:40:14,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-10-15 19:40:14,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-10-15 19:40:14,784 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:40:14,785 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 120 transitions, 1121 flow. Second operand has 47 states, 47 states have (on average 8.02127659574468) internal successors, (377), 47 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:14,785 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:40:14,785 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:40:14,785 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:40:14,950 INFO L129 PetriNetUnfolder]: 32/186 cut-off events. [2021-10-15 19:40:14,951 INFO L130 PetriNetUnfolder]: For 2926/2926 co-relation queries the response was YES. [2021-10-15 19:40:14,951 INFO L84 FinitePrefix]: Finished finitePrefix Result has 927 conditions, 186 events. 32/186 cut-off events. For 2926/2926 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 33 event pairs, 0 based on Foata normal form. 1/187 useless extension candidates. Maximal degree in co-relation 784. Up to 98 conditions per place. [2021-10-15 19:40:14,952 INFO L132 encePairwiseOnDemand]: 36/48 looper letters, 108 selfloop transitions, 45 changer transitions 0/156 dead transitions. [2021-10-15 19:40:14,952 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 156 transitions, 1569 flow [2021-10-15 19:40:14,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-10-15 19:40:14,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-10-15 19:40:14,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 370 transitions. [2021-10-15 19:40:14,954 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.16757246376811594 [2021-10-15 19:40:14,954 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 370 transitions. [2021-10-15 19:40:14,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 370 transitions. [2021-10-15 19:40:14,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:40:14,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 370 transitions. [2021-10-15 19:40:14,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 8.043478260869565) internal successors, (370), 46 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:14,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 48.0) internal successors, (2256), 47 states have internal predecessors, (2256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:14,958 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 48.0) internal successors, (2256), 47 states have internal predecessors, (2256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:14,958 INFO L186 Difference]: Start difference. First operand has 227 places, 120 transitions, 1121 flow. Second operand 46 states and 370 transitions. [2021-10-15 19:40:14,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 156 transitions, 1569 flow [2021-10-15 19:40:14,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 156 transitions, 1287 flow, removed 41 selfloop flow, removed 71 redundant places. [2021-10-15 19:40:14,982 INFO L242 Difference]: Finished difference. Result has 202 places, 121 transitions, 1007 flow [2021-10-15 19:40:14,983 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=839, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=1007, PETRI_PLACES=202, PETRI_TRANSITIONS=121} [2021-10-15 19:40:14,983 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 177 predicate places. [2021-10-15 19:40:14,983 INFO L470 AbstractCegarLoop]: Abstraction has has 202 places, 121 transitions, 1007 flow [2021-10-15 19:40:14,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 8.02127659574468) internal successors, (377), 47 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:14,983 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:40:14,984 INFO L254 CegarLoopForPetriNet]: trace histogram [65, 35, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:40:15,018 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-10-15 19:40:15,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-10-15 19:40:15,211 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:40:15,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:40:15,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1098392114, now seen corresponding path program 35 times [2021-10-15 19:40:15,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:40:15,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138921765] [2021-10-15 19:40:15,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:40:15,212 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:40:15,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:40:16,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 2124 proven. 1260 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2021-10-15 19:40:16,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:40:16,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138921765] [2021-10-15 19:40:16,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138921765] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:16,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729241016] [2021-10-15 19:40:16,032 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-15 19:40:16,032 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:40:16,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:40:16,056 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:40:16,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-15 19:40:16,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2021-10-15 19:40:16,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:40:16,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-15 19:40:16,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:40:18,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 2145 proven. 1024 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2021-10-15 19:40:18,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729241016] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:18,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:40:18,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 35] total 80 [2021-10-15 19:40:18,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218949012] [2021-10-15 19:40:18,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-10-15 19:40:18,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:40:18,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-10-15 19:40:18,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2021-10-15 19:40:18,598 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:40:18,599 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 121 transitions, 1007 flow. Second operand has 80 states, 80 states have (on average 8.2625) internal successors, (661), 80 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:18,599 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:40:18,599 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:40:18,599 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:40:19,037 INFO L129 PetriNetUnfolder]: 35/197 cut-off events. [2021-10-15 19:40:19,037 INFO L130 PetriNetUnfolder]: For 3903/3903 co-relation queries the response was YES. [2021-10-15 19:40:19,038 INFO L84 FinitePrefix]: Finished finitePrefix Result has 923 conditions, 197 events. 35/197 cut-off events. For 3903/3903 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 37 event pairs, 0 based on Foata normal form. 4/201 useless extension candidates. Maximal degree in co-relation 739. Up to 105 conditions per place. [2021-10-15 19:40:19,039 INFO L132 encePairwiseOnDemand]: 35/48 looper letters, 82 selfloop transitions, 112 changer transitions 0/197 dead transitions. [2021-10-15 19:40:19,039 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 197 transitions, 1682 flow [2021-10-15 19:40:19,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-10-15 19:40:19,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-10-15 19:40:19,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 678 transitions. [2021-10-15 19:40:19,042 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.1765625 [2021-10-15 19:40:19,042 INFO L72 ComplementDD]: Start complementDD. Operand 80 states and 678 transitions. [2021-10-15 19:40:19,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 80 states and 678 transitions. [2021-10-15 19:40:19,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:40:19,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 80 states and 678 transitions. [2021-10-15 19:40:19,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 81 states, 80 states have (on average 8.475) internal successors, (678), 80 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:19,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 81 states, 81 states have (on average 48.0) internal successors, (3888), 81 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:19,048 INFO L81 ComplementDD]: Finished complementDD. Result has 81 states, 81 states have (on average 48.0) internal successors, (3888), 81 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:19,048 INFO L186 Difference]: Start difference. First operand has 202 places, 121 transitions, 1007 flow. Second operand 80 states and 678 transitions. [2021-10-15 19:40:19,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 197 transitions, 1682 flow [2021-10-15 19:40:19,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 197 transitions, 1524 flow, removed 35 selfloop flow, removed 44 redundant places. [2021-10-15 19:40:19,085 INFO L242 Difference]: Finished difference. Result has 241 places, 128 transitions, 1243 flow [2021-10-15 19:40:19,086 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=849, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=80, PETRI_FLOW=1243, PETRI_PLACES=241, PETRI_TRANSITIONS=128} [2021-10-15 19:40:19,086 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 216 predicate places. [2021-10-15 19:40:19,086 INFO L470 AbstractCegarLoop]: Abstraction has has 241 places, 128 transitions, 1243 flow [2021-10-15 19:40:19,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 8.2625) internal successors, (661), 80 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:19,087 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:40:19,087 INFO L254 CegarLoopForPetriNet]: trace histogram [69, 36, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:40:19,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-10-15 19:40:19,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-10-15 19:40:19,307 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:40:19,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:40:19,307 INFO L82 PathProgramCache]: Analyzing trace with hash -510719171, now seen corresponding path program 36 times [2021-10-15 19:40:19,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:40:19,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934369014] [2021-10-15 19:40:19,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:40:19,308 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:40:19,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:40:20,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 2405 proven. 1332 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2021-10-15 19:40:20,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:40:20,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934369014] [2021-10-15 19:40:20,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934369014] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:20,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119679586] [2021-10-15 19:40:20,108 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-15 19:40:20,109 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:40:20,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:40:20,125 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:40:20,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-15 19:40:21,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 69 check-sat command(s) [2021-10-15 19:40:21,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:40:21,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 47 conjunts are in the unsatisfiable core [2021-10-15 19:40:21,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:40:21,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 2405 proven. 1332 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2021-10-15 19:40:21,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119679586] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:21,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:40:21,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2021-10-15 19:40:21,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845082259] [2021-10-15 19:40:21,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-10-15 19:40:21,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:40:21,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-10-15 19:40:21,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-10-15 19:40:21,509 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:40:21,509 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 128 transitions, 1243 flow. Second operand has 49 states, 49 states have (on average 8.020408163265307) internal successors, (393), 49 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:21,509 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:40:21,509 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:40:21,509 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:40:21,652 INFO L129 PetriNetUnfolder]: 35/199 cut-off events. [2021-10-15 19:40:21,652 INFO L130 PetriNetUnfolder]: For 3377/3377 co-relation queries the response was YES. [2021-10-15 19:40:21,653 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1013 conditions, 199 events. 35/199 cut-off events. For 3377/3377 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 36 event pairs, 0 based on Foata normal form. 1/200 useless extension candidates. Maximal degree in co-relation 852. Up to 106 conditions per place. [2021-10-15 19:40:21,654 INFO L132 encePairwiseOnDemand]: 36/48 looper letters, 116 selfloop transitions, 47 changer transitions 0/166 dead transitions. [2021-10-15 19:40:21,654 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 166 transitions, 1719 flow [2021-10-15 19:40:21,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-10-15 19:40:21,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-10-15 19:40:21,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 386 transitions. [2021-10-15 19:40:21,656 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.1675347222222222 [2021-10-15 19:40:21,656 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 386 transitions. [2021-10-15 19:40:21,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 386 transitions. [2021-10-15 19:40:21,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:40:21,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 386 transitions. [2021-10-15 19:40:21,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 8.041666666666666) internal successors, (386), 48 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:21,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 48.0) internal successors, (2352), 49 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:21,660 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 48.0) internal successors, (2352), 49 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:21,660 INFO L186 Difference]: Start difference. First operand has 241 places, 128 transitions, 1243 flow. Second operand 48 states and 386 transitions. [2021-10-15 19:40:21,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 166 transitions, 1719 flow [2021-10-15 19:40:21,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 166 transitions, 1374 flow, removed 61 selfloop flow, removed 76 redundant places. [2021-10-15 19:40:21,702 INFO L242 Difference]: Finished difference. Result has 213 places, 129 transitions, 1074 flow [2021-10-15 19:40:21,702 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=898, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=1074, PETRI_PLACES=213, PETRI_TRANSITIONS=129} [2021-10-15 19:40:21,703 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 188 predicate places. [2021-10-15 19:40:21,703 INFO L470 AbstractCegarLoop]: Abstraction has has 213 places, 129 transitions, 1074 flow [2021-10-15 19:40:21,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 8.020408163265307) internal successors, (393), 49 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:21,703 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:40:21,703 INFO L254 CegarLoopForPetriNet]: trace histogram [70, 37, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:40:21,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-10-15 19:40:21,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:40:21,919 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:40:21,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:40:21,919 INFO L82 PathProgramCache]: Analyzing trace with hash 249890586, now seen corresponding path program 37 times [2021-10-15 19:40:21,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:40:21,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207779340] [2021-10-15 19:40:21,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:40:21,920 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:40:21,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:40:22,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2470 proven. 1406 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2021-10-15 19:40:22,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:40:22,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207779340] [2021-10-15 19:40:22,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207779340] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:22,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951354574] [2021-10-15 19:40:22,849 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-15 19:40:22,849 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:40:22,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:40:22,855 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:40:22,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-15 19:40:23,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:40:23,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 48 conjunts are in the unsatisfiable core [2021-10-15 19:40:23,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:40:24,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2470 proven. 1406 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2021-10-15 19:40:24,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951354574] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:24,195 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:40:24,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2021-10-15 19:40:24,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889789166] [2021-10-15 19:40:24,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-10-15 19:40:24,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:40:24,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-10-15 19:40:24,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-10-15 19:40:24,197 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:40:24,198 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 129 transitions, 1074 flow. Second operand has 50 states, 50 states have (on average 8.02) internal successors, (401), 50 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:24,198 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:40:24,198 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:40:24,198 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:40:24,379 INFO L129 PetriNetUnfolder]: 35/201 cut-off events. [2021-10-15 19:40:24,379 INFO L130 PetriNetUnfolder]: For 3412/3412 co-relation queries the response was YES. [2021-10-15 19:40:24,381 INFO L84 FinitePrefix]: Finished finitePrefix Result has 935 conditions, 201 events. 35/201 cut-off events. For 3412/3412 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 36 event pairs, 0 based on Foata normal form. 1/202 useless extension candidates. Maximal degree in co-relation 793. Up to 107 conditions per place. [2021-10-15 19:40:24,382 INFO L132 encePairwiseOnDemand]: 36/48 looper letters, 117 selfloop transitions, 48 changer transitions 0/168 dead transitions. [2021-10-15 19:40:24,382 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 168 transitions, 1558 flow [2021-10-15 19:40:24,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-10-15 19:40:24,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-10-15 19:40:24,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 394 transitions. [2021-10-15 19:40:24,384 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.16751700680272108 [2021-10-15 19:40:24,384 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 394 transitions. [2021-10-15 19:40:24,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 394 transitions. [2021-10-15 19:40:24,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:40:24,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 394 transitions. [2021-10-15 19:40:24,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 8.040816326530612) internal successors, (394), 49 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:24,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 48.0) internal successors, (2400), 50 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:24,387 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 48.0) internal successors, (2400), 50 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:24,387 INFO L186 Difference]: Start difference. First operand has 213 places, 129 transitions, 1074 flow. Second operand 49 states and 394 transitions. [2021-10-15 19:40:24,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 168 transitions, 1558 flow [2021-10-15 19:40:24,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 168 transitions, 1392 flow, removed 37 selfloop flow, removed 46 redundant places. [2021-10-15 19:40:24,428 INFO L242 Difference]: Finished difference. Result has 216 places, 130 transitions, 1088 flow [2021-10-15 19:40:24,428 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=908, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=1088, PETRI_PLACES=216, PETRI_TRANSITIONS=130} [2021-10-15 19:40:24,428 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 191 predicate places. [2021-10-15 19:40:24,428 INFO L470 AbstractCegarLoop]: Abstraction has has 216 places, 130 transitions, 1088 flow [2021-10-15 19:40:24,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 8.02) internal successors, (401), 50 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:24,429 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:40:24,429 INFO L254 CegarLoopForPetriNet]: trace histogram [71, 38, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:40:24,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-10-15 19:40:24,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:40:24,629 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:40:24,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:40:24,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1051426743, now seen corresponding path program 38 times [2021-10-15 19:40:24,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:40:24,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454928065] [2021-10-15 19:40:24,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:40:24,630 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:40:24,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:40:25,564 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 2535 proven. 1482 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2021-10-15 19:40:25,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:40:25,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454928065] [2021-10-15 19:40:25,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454928065] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:25,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555143979] [2021-10-15 19:40:25,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:40:25,564 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:40:25,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:40:25,566 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:40:25,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-10-15 19:40:26,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:40:26,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:40:26,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 49 conjunts are in the unsatisfiable core [2021-10-15 19:40:26,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:40:26,985 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 2535 proven. 1482 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2021-10-15 19:40:26,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555143979] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:26,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:40:26,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2021-10-15 19:40:26,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049113212] [2021-10-15 19:40:26,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-15 19:40:26,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:40:26,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-15 19:40:26,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-10-15 19:40:26,988 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:40:26,988 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 130 transitions, 1088 flow. Second operand has 51 states, 51 states have (on average 8.019607843137255) internal successors, (409), 51 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:26,988 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:40:26,988 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:40:26,988 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:40:27,170 INFO L129 PetriNetUnfolder]: 35/203 cut-off events. [2021-10-15 19:40:27,171 INFO L130 PetriNetUnfolder]: For 3579/3579 co-relation queries the response was YES. [2021-10-15 19:40:27,172 INFO L84 FinitePrefix]: Finished finitePrefix Result has 947 conditions, 203 events. 35/203 cut-off events. For 3579/3579 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 36 event pairs, 0 based on Foata normal form. 1/204 useless extension candidates. Maximal degree in co-relation 804. Up to 108 conditions per place. [2021-10-15 19:40:27,173 INFO L132 encePairwiseOnDemand]: 36/48 looper letters, 118 selfloop transitions, 49 changer transitions 0/170 dead transitions. [2021-10-15 19:40:27,173 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 170 transitions, 1580 flow [2021-10-15 19:40:27,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-10-15 19:40:27,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-10-15 19:40:27,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 402 transitions. [2021-10-15 19:40:27,174 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.1675 [2021-10-15 19:40:27,174 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 402 transitions. [2021-10-15 19:40:27,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 402 transitions. [2021-10-15 19:40:27,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:40:27,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 402 transitions. [2021-10-15 19:40:27,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 8.04) internal successors, (402), 50 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:27,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 48.0) internal successors, (2448), 51 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:27,178 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 48.0) internal successors, (2448), 51 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:27,179 INFO L186 Difference]: Start difference. First operand has 216 places, 130 transitions, 1088 flow. Second operand 50 states and 402 transitions. [2021-10-15 19:40:27,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 170 transitions, 1580 flow [2021-10-15 19:40:27,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 170 transitions, 1410 flow, removed 38 selfloop flow, removed 47 redundant places. [2021-10-15 19:40:27,216 INFO L242 Difference]: Finished difference. Result has 219 places, 131 transitions, 1102 flow [2021-10-15 19:40:27,216 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=918, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=1102, PETRI_PLACES=219, PETRI_TRANSITIONS=131} [2021-10-15 19:40:27,217 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 194 predicate places. [2021-10-15 19:40:27,217 INFO L470 AbstractCegarLoop]: Abstraction has has 219 places, 131 transitions, 1102 flow [2021-10-15 19:40:27,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 8.019607843137255) internal successors, (409), 51 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:27,217 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:40:27,217 INFO L254 CegarLoopForPetriNet]: trace histogram [72, 39, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:40:27,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-10-15 19:40:27,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-10-15 19:40:27,431 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:40:27,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:40:27,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1766439660, now seen corresponding path program 39 times [2021-10-15 19:40:27,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:40:27,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112684486] [2021-10-15 19:40:27,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:40:27,432 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:40:27,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:40:28,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 2600 proven. 1560 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2021-10-15 19:40:28,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:40:28,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112684486] [2021-10-15 19:40:28,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112684486] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:28,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023691699] [2021-10-15 19:40:28,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:40:28,447 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:40:28,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:40:28,448 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:40:28,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-15 19:40:29,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 68 check-sat command(s) [2021-10-15 19:40:29,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:40:29,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-15 19:40:29,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:40:31,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 2613 proven. 1089 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2021-10-15 19:40:31,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023691699] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:31,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:40:31,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 36] total 85 [2021-10-15 19:40:31,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962583218] [2021-10-15 19:40:31,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-10-15 19:40:31,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:40:31,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-10-15 19:40:31,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2021-10-15 19:40:31,450 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:40:31,450 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 131 transitions, 1102 flow. Second operand has 85 states, 85 states have (on average 8.24705882352941) internal successors, (701), 85 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:31,450 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:40:31,451 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:40:31,451 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:40:32,028 INFO L129 PetriNetUnfolder]: 36/208 cut-off events. [2021-10-15 19:40:32,029 INFO L130 PetriNetUnfolder]: For 4105/4105 co-relation queries the response was YES. [2021-10-15 19:40:32,029 INFO L84 FinitePrefix]: Finished finitePrefix Result has 975 conditions, 208 events. 36/208 cut-off events. For 4105/4105 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 38 event pairs, 0 based on Foata normal form. 2/210 useless extension candidates. Maximal degree in co-relation 815. Up to 111 conditions per place. [2021-10-15 19:40:32,031 INFO L132 encePairwiseOnDemand]: 35/48 looper letters, 87 selfloop transitions, 118 changer transitions 0/208 dead transitions. [2021-10-15 19:40:32,031 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 208 transitions, 1766 flow [2021-10-15 19:40:32,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-10-15 19:40:32,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-10-15 19:40:32,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 717 transitions. [2021-10-15 19:40:32,037 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.17573529411764705 [2021-10-15 19:40:32,037 INFO L72 ComplementDD]: Start complementDD. Operand 85 states and 717 transitions. [2021-10-15 19:40:32,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 717 transitions. [2021-10-15 19:40:32,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:40:32,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 85 states and 717 transitions. [2021-10-15 19:40:32,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 86 states, 85 states have (on average 8.435294117647059) internal successors, (717), 85 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:32,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 86 states, 86 states have (on average 48.0) internal successors, (4128), 86 states have internal predecessors, (4128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:32,044 INFO L81 ComplementDD]: Finished complementDD. Result has 86 states, 86 states have (on average 48.0) internal successors, (4128), 86 states have internal predecessors, (4128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:32,044 INFO L186 Difference]: Start difference. First operand has 219 places, 131 transitions, 1102 flow. Second operand 85 states and 717 transitions. [2021-10-15 19:40:32,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 208 transitions, 1766 flow [2021-10-15 19:40:32,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 208 transitions, 1592 flow, removed 39 selfloop flow, removed 48 redundant places. [2021-10-15 19:40:32,072 INFO L242 Difference]: Finished difference. Result has 257 places, 134 transitions, 1281 flow [2021-10-15 19:40:32,072 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=928, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=1281, PETRI_PLACES=257, PETRI_TRANSITIONS=134} [2021-10-15 19:40:32,072 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 232 predicate places. [2021-10-15 19:40:32,072 INFO L470 AbstractCegarLoop]: Abstraction has has 257 places, 134 transitions, 1281 flow [2021-10-15 19:40:32,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 8.24705882352941) internal successors, (701), 85 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:32,073 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:40:32,073 INFO L254 CegarLoopForPetriNet]: trace histogram [74, 40, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:40:32,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-10-15 19:40:32,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-10-15 19:40:32,273 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:40:32,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:40:32,274 INFO L82 PathProgramCache]: Analyzing trace with hash -502982677, now seen corresponding path program 40 times [2021-10-15 19:40:32,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:40:32,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911093480] [2021-10-15 19:40:32,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:40:32,274 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:40:32,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:40:33,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 2747 proven. 1640 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2021-10-15 19:40:33,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:40:33,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911093480] [2021-10-15 19:40:33,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911093480] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:33,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901002431] [2021-10-15 19:40:33,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 19:40:33,218 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:40:33,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:40:33,221 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:40:33,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-15 19:40:34,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 19:40:34,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:40:34,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 51 conjunts are in the unsatisfiable core [2021-10-15 19:40:34,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:40:34,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 2747 proven. 1640 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2021-10-15 19:40:34,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901002431] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:34,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:40:34,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2021-10-15 19:40:34,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18461147] [2021-10-15 19:40:34,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-10-15 19:40:34,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:40:34,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-10-15 19:40:34,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-10-15 19:40:34,665 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:40:34,666 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 134 transitions, 1281 flow. Second operand has 53 states, 53 states have (on average 8.018867924528301) internal successors, (425), 53 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:34,666 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:40:34,666 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:40:34,666 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:40:34,863 INFO L129 PetriNetUnfolder]: 36/210 cut-off events. [2021-10-15 19:40:34,863 INFO L130 PetriNetUnfolder]: For 3935/3935 co-relation queries the response was YES. [2021-10-15 19:40:34,865 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1059 conditions, 210 events. 36/210 cut-off events. For 3935/3935 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 37 event pairs, 0 based on Foata normal form. 1/211 useless extension candidates. Maximal degree in co-relation 900. Up to 112 conditions per place. [2021-10-15 19:40:34,866 INFO L132 encePairwiseOnDemand]: 36/48 looper letters, 122 selfloop transitions, 51 changer transitions 0/176 dead transitions. [2021-10-15 19:40:34,867 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 176 transitions, 1793 flow [2021-10-15 19:40:34,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-10-15 19:40:34,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-10-15 19:40:34,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 418 transitions. [2021-10-15 19:40:34,877 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.1674679487179487 [2021-10-15 19:40:34,877 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 418 transitions. [2021-10-15 19:40:34,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 418 transitions. [2021-10-15 19:40:34,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:40:34,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 418 transitions. [2021-10-15 19:40:34,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 8.038461538461538) internal successors, (418), 52 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:34,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 48.0) internal successors, (2544), 53 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:34,881 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 48.0) internal successors, (2544), 53 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:34,881 INFO L186 Difference]: Start difference. First operand has 257 places, 134 transitions, 1281 flow. Second operand 52 states and 418 transitions. [2021-10-15 19:40:34,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 176 transitions, 1793 flow [2021-10-15 19:40:34,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 176 transitions, 1469 flow, removed 48 selfloop flow, removed 81 redundant places. [2021-10-15 19:40:34,929 INFO L242 Difference]: Finished difference. Result has 228 places, 135 transitions, 1149 flow [2021-10-15 19:40:34,930 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=957, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=1149, PETRI_PLACES=228, PETRI_TRANSITIONS=135} [2021-10-15 19:40:34,930 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 203 predicate places. [2021-10-15 19:40:34,930 INFO L470 AbstractCegarLoop]: Abstraction has has 228 places, 135 transitions, 1149 flow [2021-10-15 19:40:34,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 8.018867924528301) internal successors, (425), 53 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:34,930 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:40:34,931 INFO L254 CegarLoopForPetriNet]: trace histogram [75, 41, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:40:34,954 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-10-15 19:40:35,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:40:35,131 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:40:35,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:40:35,132 INFO L82 PathProgramCache]: Analyzing trace with hash -305421432, now seen corresponding path program 41 times [2021-10-15 19:40:35,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:40:35,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736499582] [2021-10-15 19:40:35,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:40:35,132 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:40:35,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:40:37,609 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:40:37,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:40:37,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736499582] [2021-10-15 19:40:37,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736499582] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:37,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232730978] [2021-10-15 19:40:37,609 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-15 19:40:37,609 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:40:37,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:40:37,610 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:40:37,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-10-15 19:40:38,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 76 check-sat command(s) [2021-10-15 19:40:38,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:40:38,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-15 19:40:38,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:40:39,366 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 2850 proven. 1369 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2021-10-15 19:40:39,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232730978] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:39,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:40:39,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 40] total 90 [2021-10-15 19:40:39,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589996452] [2021-10-15 19:40:39,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-10-15 19:40:39,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:40:39,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-10-15 19:40:39,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2021-10-15 19:40:39,369 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:40:39,370 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 135 transitions, 1149 flow. Second operand has 90 states, 90 states have (on average 8.244444444444444) internal successors, (742), 90 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:39,370 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:40:39,370 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:40:39,370 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:40:39,880 INFO L129 PetriNetUnfolder]: 40/222 cut-off events. [2021-10-15 19:40:39,880 INFO L130 PetriNetUnfolder]: For 4321/4321 co-relation queries the response was YES. [2021-10-15 19:40:39,882 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1020 conditions, 222 events. 40/222 cut-off events. For 4321/4321 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 41 event pairs, 0 based on Foata normal form. 4/226 useless extension candidates. Maximal degree in co-relation 801. Up to 120 conditions per place. [2021-10-15 19:40:39,883 INFO L132 encePairwiseOnDemand]: 35/48 looper letters, 92 selfloop transitions, 127 changer transitions 0/222 dead transitions. [2021-10-15 19:40:39,883 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 222 transitions, 1853 flow [2021-10-15 19:40:39,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-10-15 19:40:39,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2021-10-15 19:40:39,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 763 transitions. [2021-10-15 19:40:39,885 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.17662037037037037 [2021-10-15 19:40:39,885 INFO L72 ComplementDD]: Start complementDD. Operand 90 states and 763 transitions. [2021-10-15 19:40:39,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 90 states and 763 transitions. [2021-10-15 19:40:39,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:40:39,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 90 states and 763 transitions. [2021-10-15 19:40:39,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 91 states, 90 states have (on average 8.477777777777778) internal successors, (763), 90 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:39,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 91 states, 91 states have (on average 48.0) internal successors, (4368), 91 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:39,889 INFO L81 ComplementDD]: Finished complementDD. Result has 91 states, 91 states have (on average 48.0) internal successors, (4368), 91 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:39,889 INFO L186 Difference]: Start difference. First operand has 228 places, 135 transitions, 1149 flow. Second operand 90 states and 763 transitions. [2021-10-15 19:40:39,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 222 transitions, 1853 flow [2021-10-15 19:40:39,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 222 transitions, 1671 flow, removed 41 selfloop flow, removed 50 redundant places. [2021-10-15 19:40:39,919 INFO L242 Difference]: Finished difference. Result has 271 places, 143 transitions, 1351 flow [2021-10-15 19:40:39,920 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=967, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=90, PETRI_FLOW=1351, PETRI_PLACES=271, PETRI_TRANSITIONS=143} [2021-10-15 19:40:39,920 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 246 predicate places. [2021-10-15 19:40:39,920 INFO L470 AbstractCegarLoop]: Abstraction has has 271 places, 143 transitions, 1351 flow [2021-10-15 19:40:39,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 8.244444444444444) internal successors, (742), 90 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:39,920 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:40:39,921 INFO L254 CegarLoopForPetriNet]: trace histogram [79, 41, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:40:39,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-10-15 19:40:40,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-10-15 19:40:40,121 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:40:40,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:40:40,122 INFO L82 PathProgramCache]: Analyzing trace with hash -2140145552, now seen corresponding path program 42 times [2021-10-15 19:40:40,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:40:40,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423161190] [2021-10-15 19:40:40,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:40:40,122 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:40:40,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:40:42,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:40:42,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:40:42,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423161190] [2021-10-15 19:40:42,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423161190] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:42,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412087616] [2021-10-15 19:40:42,994 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-15 19:40:42,994 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:40:42,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:40:42,995 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:40:42,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-10-15 19:40:44,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2021-10-15 19:40:44,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:40:44,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-15 19:40:44,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:40:44,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 3160 proven. 1521 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2021-10-15 19:40:44,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412087616] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:44,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:40:44,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 42] total 92 [2021-10-15 19:40:44,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755403341] [2021-10-15 19:40:44,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-10-15 19:40:44,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:40:44,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-10-15 19:40:44,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2021-10-15 19:40:44,740 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:40:44,740 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 143 transitions, 1351 flow. Second operand has 92 states, 92 states have (on average 8.217391304347826) internal successors, (756), 92 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:44,740 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:40:44,740 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:40:44,740 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:40:45,333 INFO L129 PetriNetUnfolder]: 42/228 cut-off events. [2021-10-15 19:40:45,334 INFO L130 PetriNetUnfolder]: For 3263/3263 co-relation queries the response was YES. [2021-10-15 19:40:45,335 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1111 conditions, 228 events. 42/228 cut-off events. For 3263/3263 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 43 event pairs, 0 based on Foata normal form. 2/230 useless extension candidates. Maximal degree in co-relation 904. Up to 124 conditions per place. [2021-10-15 19:40:45,336 INFO L132 encePairwiseOnDemand]: 35/48 looper letters, 94 selfloop transitions, 131 changer transitions 0/228 dead transitions. [2021-10-15 19:40:45,337 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 228 transitions, 2025 flow [2021-10-15 19:40:45,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-10-15 19:40:45,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2021-10-15 19:40:45,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 779 transitions. [2021-10-15 19:40:45,339 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.17640398550724637 [2021-10-15 19:40:45,339 INFO L72 ComplementDD]: Start complementDD. Operand 92 states and 779 transitions. [2021-10-15 19:40:45,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 92 states and 779 transitions. [2021-10-15 19:40:45,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:40:45,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 92 states and 779 transitions. [2021-10-15 19:40:45,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 93 states, 92 states have (on average 8.467391304347826) internal successors, (779), 92 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:45,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 93 states, 93 states have (on average 48.0) internal successors, (4464), 93 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:45,344 INFO L81 ComplementDD]: Finished complementDD. Result has 93 states, 93 states have (on average 48.0) internal successors, (4464), 93 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:45,344 INFO L186 Difference]: Start difference. First operand has 271 places, 143 transitions, 1351 flow. Second operand 92 states and 779 transitions. [2021-10-15 19:40:45,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 228 transitions, 2025 flow [2021-10-15 19:40:45,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 228 transitions, 1687 flow, removed 39 selfloop flow, removed 86 redundant places. [2021-10-15 19:40:45,379 INFO L242 Difference]: Finished difference. Result has 278 places, 147 transitions, 1349 flow [2021-10-15 19:40:45,380 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1023, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=92, PETRI_FLOW=1349, PETRI_PLACES=278, PETRI_TRANSITIONS=147} [2021-10-15 19:40:45,380 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 253 predicate places. [2021-10-15 19:40:45,380 INFO L470 AbstractCegarLoop]: Abstraction has has 278 places, 147 transitions, 1349 flow [2021-10-15 19:40:45,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 8.217391304347826) internal successors, (756), 92 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:45,381 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:40:45,381 INFO L254 CegarLoopForPetriNet]: trace histogram [81, 41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:40:45,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-10-15 19:40:45,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-10-15 19:40:45,583 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:40:45,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:40:45,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1382163484, now seen corresponding path program 43 times [2021-10-15 19:40:45,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:40:45,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733748008] [2021-10-15 19:40:45,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:40:45,584 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:40:45,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:40:48,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:40:48,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:40:48,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733748008] [2021-10-15 19:40:48,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733748008] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:48,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178077409] [2021-10-15 19:40:48,489 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-15 19:40:48,489 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:40:48,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:40:48,492 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:40:48,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-10-15 19:40:49,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:40:49,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 92 conjunts are in the unsatisfiable core [2021-10-15 19:40:49,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:40:50,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:40:50,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178077409] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:50,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:40:50,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 94 [2021-10-15 19:40:50,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308848900] [2021-10-15 19:40:50,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-10-15 19:40:50,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:40:50,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-10-15 19:40:50,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2021-10-15 19:40:50,226 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:40:50,227 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 147 transitions, 1349 flow. Second operand has 94 states, 94 states have (on average 7.968085106382978) internal successors, (749), 94 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:50,227 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:40:50,227 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:40:50,227 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:40:50,758 INFO L129 PetriNetUnfolder]: 43/231 cut-off events. [2021-10-15 19:40:50,758 INFO L130 PetriNetUnfolder]: For 2780/2780 co-relation queries the response was YES. [2021-10-15 19:40:50,759 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1104 conditions, 231 events. 43/231 cut-off events. For 2780/2780 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 45 event pairs, 0 based on Foata normal form. 1/232 useless extension candidates. Maximal degree in co-relation 903. Up to 126 conditions per place. [2021-10-15 19:40:50,760 INFO L132 encePairwiseOnDemand]: 35/48 looper letters, 95 selfloop transitions, 133 changer transitions 0/231 dead transitions. [2021-10-15 19:40:50,761 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 231 transitions, 1999 flow [2021-10-15 19:40:50,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-10-15 19:40:50,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2021-10-15 19:40:50,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 787 transitions. [2021-10-15 19:40:50,763 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.17629928315412186 [2021-10-15 19:40:50,764 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 787 transitions. [2021-10-15 19:40:50,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 787 transitions. [2021-10-15 19:40:50,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:40:50,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 787 transitions. [2021-10-15 19:40:50,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 8.46236559139785) internal successors, (787), 93 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:50,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 48.0) internal successors, (4512), 94 states have internal predecessors, (4512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:50,770 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 48.0) internal successors, (4512), 94 states have internal predecessors, (4512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:50,770 INFO L186 Difference]: Start difference. First operand has 278 places, 147 transitions, 1349 flow. Second operand 93 states and 787 transitions. [2021-10-15 19:40:50,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 231 transitions, 1999 flow [2021-10-15 19:40:50,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 231 transitions, 1699 flow, removed 20 selfloop flow, removed 89 redundant places. [2021-10-15 19:40:50,822 INFO L242 Difference]: Finished difference. Result has 282 places, 149 transitions, 1352 flow [2021-10-15 19:40:50,823 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1053, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=1352, PETRI_PLACES=282, PETRI_TRANSITIONS=149} [2021-10-15 19:40:50,823 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 257 predicate places. [2021-10-15 19:40:50,823 INFO L470 AbstractCegarLoop]: Abstraction has has 282 places, 149 transitions, 1352 flow [2021-10-15 19:40:50,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 7.968085106382978) internal successors, (749), 94 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:50,824 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:40:50,824 INFO L254 CegarLoopForPetriNet]: trace histogram [82, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:40:50,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-10-15 19:40:51,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:40:51,038 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:40:51,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:40:51,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1121752098, now seen corresponding path program 44 times [2021-10-15 19:40:51,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:40:51,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340915327] [2021-10-15 19:40:51,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:40:51,039 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:40:51,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:40:53,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:40:53,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:40:53,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340915327] [2021-10-15 19:40:53,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340915327] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:53,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115389234] [2021-10-15 19:40:53,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:40:53,914 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:40:53,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:40:53,915 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:40:53,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-10-15 19:40:55,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:40:55,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:40:55,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 93 conjunts are in the unsatisfiable core [2021-10-15 19:40:55,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:40:55,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:40:55,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115389234] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:55,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:40:55,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 95 [2021-10-15 19:40:55,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233153517] [2021-10-15 19:40:55,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-10-15 19:40:55,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:40:55,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-10-15 19:40:55,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2021-10-15 19:40:55,711 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:40:55,711 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 149 transitions, 1352 flow. Second operand has 95 states, 95 states have (on average 7.968421052631579) internal successors, (757), 95 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:55,712 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:40:55,712 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:40:55,712 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:40:56,401 INFO L129 PetriNetUnfolder]: 44/234 cut-off events. [2021-10-15 19:40:56,401 INFO L130 PetriNetUnfolder]: For 2765/2765 co-relation queries the response was YES. [2021-10-15 19:40:56,402 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1111 conditions, 234 events. 44/234 cut-off events. For 2765/2765 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 45 event pairs, 0 based on Foata normal form. 1/235 useless extension candidates. Maximal degree in co-relation 916. Up to 128 conditions per place. [2021-10-15 19:40:56,403 INFO L132 encePairwiseOnDemand]: 35/48 looper letters, 96 selfloop transitions, 135 changer transitions 0/234 dead transitions. [2021-10-15 19:40:56,403 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 234 transitions, 2010 flow [2021-10-15 19:40:56,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-10-15 19:40:56,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2021-10-15 19:40:56,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 796 transitions. [2021-10-15 19:40:56,405 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.17641843971631205 [2021-10-15 19:40:56,405 INFO L72 ComplementDD]: Start complementDD. Operand 94 states and 796 transitions. [2021-10-15 19:40:56,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 94 states and 796 transitions. [2021-10-15 19:40:56,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:40:56,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 94 states and 796 transitions. [2021-10-15 19:40:56,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 95 states, 94 states have (on average 8.46808510638298) internal successors, (796), 94 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:56,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 95 states, 95 states have (on average 48.0) internal successors, (4560), 95 states have internal predecessors, (4560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:56,412 INFO L81 ComplementDD]: Finished complementDD. Result has 95 states, 95 states have (on average 48.0) internal successors, (4560), 95 states have internal predecessors, (4560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:56,412 INFO L186 Difference]: Start difference. First operand has 282 places, 149 transitions, 1352 flow. Second operand 94 states and 796 transitions. [2021-10-15 19:40:56,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 234 transitions, 2010 flow [2021-10-15 19:40:56,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 234 transitions, 1731 flow, removed 9 selfloop flow, removed 90 redundant places. [2021-10-15 19:40:56,466 INFO L242 Difference]: Finished difference. Result has 286 places, 151 transitions, 1380 flow [2021-10-15 19:40:56,467 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1074, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=94, PETRI_FLOW=1380, PETRI_PLACES=286, PETRI_TRANSITIONS=151} [2021-10-15 19:40:56,467 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 261 predicate places. [2021-10-15 19:40:56,467 INFO L470 AbstractCegarLoop]: Abstraction has has 286 places, 151 transitions, 1380 flow [2021-10-15 19:40:56,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 7.968421052631579) internal successors, (757), 95 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:56,468 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:40:56,468 INFO L254 CegarLoopForPetriNet]: trace histogram [83, 42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:40:56,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-10-15 19:40:56,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-10-15 19:40:56,695 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:40:56,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:40:56,695 INFO L82 PathProgramCache]: Analyzing trace with hash 25486680, now seen corresponding path program 45 times [2021-10-15 19:40:56,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:40:56,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455849624] [2021-10-15 19:40:56,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:40:56,696 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:40:56,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:40:59,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:40:59,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:40:59,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455849624] [2021-10-15 19:40:59,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455849624] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:59,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253168046] [2021-10-15 19:40:59,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:40:59,693 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:40:59,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:40:59,694 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:40:59,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-10-15 19:41:01,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 84 check-sat command(s) [2021-10-15 19:41:01,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:41:01,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 94 conjunts are in the unsatisfiable core [2021-10-15 19:41:01,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:41:01,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:41:01,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253168046] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:41:01,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:41:01,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 96 [2021-10-15 19:41:01,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59407240] [2021-10-15 19:41:01,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-10-15 19:41:01,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:41:01,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-10-15 19:41:01,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2021-10-15 19:41:01,637 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:41:01,638 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 151 transitions, 1380 flow. Second operand has 96 states, 96 states have (on average 7.96875) internal successors, (765), 96 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:01,638 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:01,638 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:41:01,638 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:02,376 INFO L129 PetriNetUnfolder]: 45/237 cut-off events. [2021-10-15 19:41:02,376 INFO L130 PetriNetUnfolder]: For 2817/2817 co-relation queries the response was YES. [2021-10-15 19:41:02,378 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1131 conditions, 237 events. 45/237 cut-off events. For 2817/2817 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 46 event pairs, 0 based on Foata normal form. 1/238 useless extension candidates. Maximal degree in co-relation 930. Up to 130 conditions per place. [2021-10-15 19:41:02,380 INFO L132 encePairwiseOnDemand]: 35/48 looper letters, 97 selfloop transitions, 137 changer transitions 0/237 dead transitions. [2021-10-15 19:41:02,380 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 237 transitions, 2049 flow [2021-10-15 19:41:02,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-10-15 19:41:02,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2021-10-15 19:41:02,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 805 transitions. [2021-10-15 19:41:02,389 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.17653508771929824 [2021-10-15 19:41:02,390 INFO L72 ComplementDD]: Start complementDD. Operand 95 states and 805 transitions. [2021-10-15 19:41:02,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 805 transitions. [2021-10-15 19:41:02,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:02,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 95 states and 805 transitions. [2021-10-15 19:41:02,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 96 states, 95 states have (on average 8.473684210526315) internal successors, (805), 95 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:02,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 96 states, 96 states have (on average 48.0) internal successors, (4608), 96 states have internal predecessors, (4608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:02,404 INFO L81 ComplementDD]: Finished complementDD. Result has 96 states, 96 states have (on average 48.0) internal successors, (4608), 96 states have internal predecessors, (4608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:02,405 INFO L186 Difference]: Start difference. First operand has 286 places, 151 transitions, 1380 flow. Second operand 95 states and 805 transitions. [2021-10-15 19:41:02,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 237 transitions, 2049 flow [2021-10-15 19:41:02,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 237 transitions, 1759 flow, removed 10 selfloop flow, removed 92 redundant places. [2021-10-15 19:41:02,463 INFO L242 Difference]: Finished difference. Result has 289 places, 153 transitions, 1404 flow [2021-10-15 19:41:02,464 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1092, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=95, PETRI_FLOW=1404, PETRI_PLACES=289, PETRI_TRANSITIONS=153} [2021-10-15 19:41:02,464 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 264 predicate places. [2021-10-15 19:41:02,464 INFO L470 AbstractCegarLoop]: Abstraction has has 289 places, 153 transitions, 1404 flow [2021-10-15 19:41:02,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 7.96875) internal successors, (765), 96 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:02,464 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:02,465 INFO L254 CegarLoopForPetriNet]: trace histogram [84, 43, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:41:02,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-10-15 19:41:02,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:41:02,681 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:02,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:02,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1284642734, now seen corresponding path program 46 times [2021-10-15 19:41:02,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:41:02,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176922436] [2021-10-15 19:41:02,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:02,682 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:41:02,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:05,802 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:41:05,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:41:05,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176922436] [2021-10-15 19:41:05,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176922436] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:41:05,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693739746] [2021-10-15 19:41:05,802 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 19:41:05,803 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:41:05,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:41:05,803 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:41:05,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-10-15 19:41:07,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 19:41:07,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:41:07,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 95 conjunts are in the unsatisfiable core [2021-10-15 19:41:07,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:41:07,774 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:41:07,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693739746] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:41:07,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:41:07,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 97 [2021-10-15 19:41:07,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27539500] [2021-10-15 19:41:07,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-10-15 19:41:07,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:41:07,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-10-15 19:41:07,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-10-15 19:41:07,778 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:41:07,778 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 153 transitions, 1404 flow. Second operand has 97 states, 97 states have (on average 7.969072164948454) internal successors, (773), 97 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:07,778 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:07,778 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:41:07,778 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:08,467 INFO L129 PetriNetUnfolder]: 46/240 cut-off events. [2021-10-15 19:41:08,467 INFO L130 PetriNetUnfolder]: For 2859/2859 co-relation queries the response was YES. [2021-10-15 19:41:08,468 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1149 conditions, 240 events. 46/240 cut-off events. For 2859/2859 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 47 event pairs, 0 based on Foata normal form. 1/241 useless extension candidates. Maximal degree in co-relation 943. Up to 132 conditions per place. [2021-10-15 19:41:08,469 INFO L132 encePairwiseOnDemand]: 35/48 looper letters, 98 selfloop transitions, 139 changer transitions 0/240 dead transitions. [2021-10-15 19:41:08,470 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 240 transitions, 2083 flow [2021-10-15 19:41:08,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-10-15 19:41:08,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2021-10-15 19:41:08,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 814 transitions. [2021-10-15 19:41:08,472 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.17664930555555555 [2021-10-15 19:41:08,472 INFO L72 ComplementDD]: Start complementDD. Operand 96 states and 814 transitions. [2021-10-15 19:41:08,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 814 transitions. [2021-10-15 19:41:08,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:08,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 96 states and 814 transitions. [2021-10-15 19:41:08,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 97 states, 96 states have (on average 8.479166666666666) internal successors, (814), 96 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:08,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 97 states, 97 states have (on average 48.0) internal successors, (4656), 97 states have internal predecessors, (4656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:08,478 INFO L81 ComplementDD]: Finished complementDD. Result has 97 states, 97 states have (on average 48.0) internal successors, (4656), 97 states have internal predecessors, (4656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:08,478 INFO L186 Difference]: Start difference. First operand has 289 places, 153 transitions, 1404 flow. Second operand 96 states and 814 transitions. [2021-10-15 19:41:08,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 240 transitions, 2083 flow [2021-10-15 19:41:08,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 240 transitions, 1787 flow, removed 11 selfloop flow, removed 93 redundant places. [2021-10-15 19:41:08,536 INFO L242 Difference]: Finished difference. Result has 292 places, 155 transitions, 1428 flow [2021-10-15 19:41:08,536 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1110, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=96, PETRI_FLOW=1428, PETRI_PLACES=292, PETRI_TRANSITIONS=155} [2021-10-15 19:41:08,537 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 267 predicate places. [2021-10-15 19:41:08,537 INFO L470 AbstractCegarLoop]: Abstraction has has 292 places, 155 transitions, 1428 flow [2021-10-15 19:41:08,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 7.969072164948454) internal successors, (773), 97 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:08,537 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:08,537 INFO L254 CegarLoopForPetriNet]: trace histogram [85, 44, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:41:08,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-10-15 19:41:08,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:41:08,738 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:08,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:08,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1893591860, now seen corresponding path program 47 times [2021-10-15 19:41:08,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:41:08,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676919286] [2021-10-15 19:41:08,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:08,739 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:41:08,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:11,901 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:41:11,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:41:11,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676919286] [2021-10-15 19:41:11,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676919286] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:41:11,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749336000] [2021-10-15 19:41:11,902 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-15 19:41:11,902 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:41:11,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:41:11,903 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:41:11,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-10-15 19:41:13,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 86 check-sat command(s) [2021-10-15 19:41:13,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:41:13,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 47 conjunts are in the unsatisfiable core [2021-10-15 19:41:13,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:41:13,921 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 3649 proven. 1936 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2021-10-15 19:41:13,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749336000] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:41:13,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:41:13,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 47] total 97 [2021-10-15 19:41:13,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470096664] [2021-10-15 19:41:13,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-10-15 19:41:13,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:41:13,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-10-15 19:41:13,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-10-15 19:41:13,926 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:41:13,927 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 155 transitions, 1428 flow. Second operand has 97 states, 97 states have (on average 8.185567010309278) internal successors, (794), 97 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:13,927 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:13,927 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:41:13,927 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:14,664 INFO L129 PetriNetUnfolder]: 47/243 cut-off events. [2021-10-15 19:41:14,664 INFO L130 PetriNetUnfolder]: For 2904/2904 co-relation queries the response was YES. [2021-10-15 19:41:14,665 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1167 conditions, 243 events. 47/243 cut-off events. For 2904/2904 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 48 event pairs, 0 based on Foata normal form. 1/244 useless extension candidates. Maximal degree in co-relation 956. Up to 134 conditions per place. [2021-10-15 19:41:14,667 INFO L132 encePairwiseOnDemand]: 35/48 looper letters, 99 selfloop transitions, 141 changer transitions 0/243 dead transitions. [2021-10-15 19:41:14,667 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 243 transitions, 2117 flow [2021-10-15 19:41:14,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-10-15 19:41:14,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2021-10-15 19:41:14,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 823 transitions. [2021-10-15 19:41:14,668 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.17676116838487974 [2021-10-15 19:41:14,668 INFO L72 ComplementDD]: Start complementDD. Operand 97 states and 823 transitions. [2021-10-15 19:41:14,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 823 transitions. [2021-10-15 19:41:14,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:14,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 97 states and 823 transitions. [2021-10-15 19:41:14,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 98 states, 97 states have (on average 8.484536082474227) internal successors, (823), 97 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:14,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 98 states, 98 states have (on average 48.0) internal successors, (4704), 98 states have internal predecessors, (4704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:14,674 INFO L81 ComplementDD]: Finished complementDD. Result has 98 states, 98 states have (on average 48.0) internal successors, (4704), 98 states have internal predecessors, (4704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:14,674 INFO L186 Difference]: Start difference. First operand has 292 places, 155 transitions, 1428 flow. Second operand 97 states and 823 transitions. [2021-10-15 19:41:14,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 243 transitions, 2117 flow [2021-10-15 19:41:14,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 243 transitions, 1815 flow, removed 12 selfloop flow, removed 94 redundant places. [2021-10-15 19:41:14,712 INFO L242 Difference]: Finished difference. Result has 295 places, 157 transitions, 1452 flow [2021-10-15 19:41:14,712 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1128, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=1452, PETRI_PLACES=295, PETRI_TRANSITIONS=157} [2021-10-15 19:41:14,712 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 270 predicate places. [2021-10-15 19:41:14,712 INFO L470 AbstractCegarLoop]: Abstraction has has 295 places, 157 transitions, 1452 flow [2021-10-15 19:41:14,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 8.185567010309278) internal successors, (794), 97 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:14,713 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:14,713 INFO L254 CegarLoopForPetriNet]: trace histogram [86, 45, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:41:14,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-10-15 19:41:14,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-10-15 19:41:14,913 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:14,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:14,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1316817606, now seen corresponding path program 48 times [2021-10-15 19:41:14,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:41:14,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313175576] [2021-10-15 19:41:14,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:14,914 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:41:14,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:18,159 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:41:18,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:41:18,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313175576] [2021-10-15 19:41:18,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313175576] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:41:18,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215922854] [2021-10-15 19:41:18,159 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-15 19:41:18,159 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:41:18,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:41:18,160 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:41:18,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-10-15 19:41:19,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 87 check-sat command(s) [2021-10-15 19:41:19,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:41:19,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 48 conjunts are in the unsatisfiable core [2021-10-15 19:41:19,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:41:20,245 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 3731 proven. 2025 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2021-10-15 19:41:20,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215922854] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:41:20,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:41:20,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 48] total 98 [2021-10-15 19:41:20,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15969253] [2021-10-15 19:41:20,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-10-15 19:41:20,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:41:20,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-10-15 19:41:20,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2021-10-15 19:41:20,250 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:41:20,250 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 157 transitions, 1452 flow. Second operand has 98 states, 98 states have (on average 8.183673469387756) internal successors, (802), 98 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:20,251 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:20,251 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:41:20,251 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:20,991 INFO L129 PetriNetUnfolder]: 48/246 cut-off events. [2021-10-15 19:41:20,991 INFO L130 PetriNetUnfolder]: For 2952/2952 co-relation queries the response was YES. [2021-10-15 19:41:20,993 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1185 conditions, 246 events. 48/246 cut-off events. For 2952/2952 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 50 event pairs, 0 based on Foata normal form. 1/247 useless extension candidates. Maximal degree in co-relation 971. Up to 136 conditions per place. [2021-10-15 19:41:20,994 INFO L132 encePairwiseOnDemand]: 35/48 looper letters, 100 selfloop transitions, 143 changer transitions 0/246 dead transitions. [2021-10-15 19:41:20,994 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 246 transitions, 2151 flow [2021-10-15 19:41:20,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-10-15 19:41:20,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2021-10-15 19:41:20,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 832 transitions. [2021-10-15 19:41:20,996 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.17687074829931973 [2021-10-15 19:41:20,996 INFO L72 ComplementDD]: Start complementDD. Operand 98 states and 832 transitions. [2021-10-15 19:41:20,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 98 states and 832 transitions. [2021-10-15 19:41:20,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:20,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 98 states and 832 transitions. [2021-10-15 19:41:20,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 99 states, 98 states have (on average 8.489795918367347) internal successors, (832), 98 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:21,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 99 states, 99 states have (on average 48.0) internal successors, (4752), 99 states have internal predecessors, (4752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:21,000 INFO L81 ComplementDD]: Finished complementDD. Result has 99 states, 99 states have (on average 48.0) internal successors, (4752), 99 states have internal predecessors, (4752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:21,001 INFO L186 Difference]: Start difference. First operand has 295 places, 157 transitions, 1452 flow. Second operand 98 states and 832 transitions. [2021-10-15 19:41:21,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 246 transitions, 2151 flow [2021-10-15 19:41:21,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 246 transitions, 1843 flow, removed 13 selfloop flow, removed 95 redundant places. [2021-10-15 19:41:21,041 INFO L242 Difference]: Finished difference. Result has 298 places, 159 transitions, 1476 flow [2021-10-15 19:41:21,042 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1146, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=98, PETRI_FLOW=1476, PETRI_PLACES=298, PETRI_TRANSITIONS=159} [2021-10-15 19:41:21,042 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 273 predicate places. [2021-10-15 19:41:21,042 INFO L470 AbstractCegarLoop]: Abstraction has has 298 places, 159 transitions, 1476 flow [2021-10-15 19:41:21,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 8.183673469387756) internal successors, (802), 98 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:21,042 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:21,042 INFO L254 CegarLoopForPetriNet]: trace histogram [87, 46, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:41:21,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-10-15 19:41:21,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-10-15 19:41:21,247 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:21,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:21,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1561171392, now seen corresponding path program 49 times [2021-10-15 19:41:21,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:41:21,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081109011] [2021-10-15 19:41:21,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:21,248 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:41:21,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:24,453 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:41:24,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:41:24,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081109011] [2021-10-15 19:41:24,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081109011] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:41:24,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445093661] [2021-10-15 19:41:24,454 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-15 19:41:24,454 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:41:24,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:41:24,455 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:41:24,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-10-15 19:41:26,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:26,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 98 conjunts are in the unsatisfiable core [2021-10-15 19:41:26,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:41:26,620 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:41:26,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445093661] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:41:26,620 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:41:26,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 100 [2021-10-15 19:41:26,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61893760] [2021-10-15 19:41:26,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2021-10-15 19:41:26,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:41:26,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-10-15 19:41:26,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2021-10-15 19:41:26,625 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:41:26,626 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 159 transitions, 1476 flow. Second operand has 100 states, 100 states have (on average 7.97) internal successors, (797), 100 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:26,626 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:26,626 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:41:26,626 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:27,443 INFO L129 PetriNetUnfolder]: 49/249 cut-off events. [2021-10-15 19:41:27,443 INFO L130 PetriNetUnfolder]: For 3003/3003 co-relation queries the response was YES. [2021-10-15 19:41:27,444 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1203 conditions, 249 events. 49/249 cut-off events. For 3003/3003 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 51 event pairs, 0 based on Foata normal form. 1/250 useless extension candidates. Maximal degree in co-relation 988. Up to 138 conditions per place. [2021-10-15 19:41:27,445 INFO L132 encePairwiseOnDemand]: 35/48 looper letters, 101 selfloop transitions, 145 changer transitions 0/249 dead transitions. [2021-10-15 19:41:27,445 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 249 transitions, 2185 flow [2021-10-15 19:41:27,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-10-15 19:41:27,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2021-10-15 19:41:27,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 841 transitions. [2021-10-15 19:41:27,447 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.17697811447811448 [2021-10-15 19:41:27,448 INFO L72 ComplementDD]: Start complementDD. Operand 99 states and 841 transitions. [2021-10-15 19:41:27,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 99 states and 841 transitions. [2021-10-15 19:41:27,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:27,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 99 states and 841 transitions. [2021-10-15 19:41:27,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 100 states, 99 states have (on average 8.494949494949495) internal successors, (841), 99 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:27,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 100 states, 100 states have (on average 48.0) internal successors, (4800), 100 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:27,453 INFO L81 ComplementDD]: Finished complementDD. Result has 100 states, 100 states have (on average 48.0) internal successors, (4800), 100 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:27,453 INFO L186 Difference]: Start difference. First operand has 298 places, 159 transitions, 1476 flow. Second operand 99 states and 841 transitions. [2021-10-15 19:41:27,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 249 transitions, 2185 flow [2021-10-15 19:41:27,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 249 transitions, 1871 flow, removed 14 selfloop flow, removed 96 redundant places. [2021-10-15 19:41:27,496 INFO L242 Difference]: Finished difference. Result has 301 places, 161 transitions, 1500 flow [2021-10-15 19:41:27,496 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1164, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=99, PETRI_FLOW=1500, PETRI_PLACES=301, PETRI_TRANSITIONS=161} [2021-10-15 19:41:27,496 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 276 predicate places. [2021-10-15 19:41:27,497 INFO L470 AbstractCegarLoop]: Abstraction has has 301 places, 161 transitions, 1500 flow [2021-10-15 19:41:27,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 7.97) internal successors, (797), 100 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:27,497 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:27,497 INFO L254 CegarLoopForPetriNet]: trace histogram [88, 47, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:41:27,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-10-15 19:41:27,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:41:27,699 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:27,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:27,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1349659846, now seen corresponding path program 50 times [2021-10-15 19:41:27,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:41:27,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679952938] [2021-10-15 19:41:27,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:27,700 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:41:27,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:31,027 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:41:31,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:41:31,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679952938] [2021-10-15 19:41:31,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679952938] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:41:31,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455687138] [2021-10-15 19:41:31,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:41:31,028 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:41:31,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:41:31,037 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:41:31,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-10-15 19:41:32,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:41:32,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:41:32,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 99 conjunts are in the unsatisfiable core [2021-10-15 19:41:32,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:41:33,244 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:41:33,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455687138] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:41:33,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:41:33,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 101 [2021-10-15 19:41:33,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281561210] [2021-10-15 19:41:33,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-10-15 19:41:33,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:41:33,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-10-15 19:41:33,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2021-10-15 19:41:33,248 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:41:33,248 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 161 transitions, 1500 flow. Second operand has 101 states, 101 states have (on average 7.97029702970297) internal successors, (805), 101 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:33,248 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:33,248 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:41:33,248 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:34,063 INFO L129 PetriNetUnfolder]: 50/252 cut-off events. [2021-10-15 19:41:34,063 INFO L130 PetriNetUnfolder]: For 3057/3057 co-relation queries the response was YES. [2021-10-15 19:41:34,064 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1221 conditions, 252 events. 50/252 cut-off events. For 3057/3057 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 52 event pairs, 0 based on Foata normal form. 1/253 useless extension candidates. Maximal degree in co-relation 1005. Up to 140 conditions per place. [2021-10-15 19:41:34,066 INFO L132 encePairwiseOnDemand]: 35/48 looper letters, 102 selfloop transitions, 147 changer transitions 0/252 dead transitions. [2021-10-15 19:41:34,066 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 252 transitions, 2219 flow [2021-10-15 19:41:34,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-10-15 19:41:34,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2021-10-15 19:41:34,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 850 transitions. [2021-10-15 19:41:34,067 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.17708333333333334 [2021-10-15 19:41:34,067 INFO L72 ComplementDD]: Start complementDD. Operand 100 states and 850 transitions. [2021-10-15 19:41:34,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 100 states and 850 transitions. [2021-10-15 19:41:34,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:34,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 100 states and 850 transitions. [2021-10-15 19:41:34,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 101 states, 100 states have (on average 8.5) internal successors, (850), 100 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:34,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 101 states, 101 states have (on average 48.0) internal successors, (4848), 101 states have internal predecessors, (4848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:34,072 INFO L81 ComplementDD]: Finished complementDD. Result has 101 states, 101 states have (on average 48.0) internal successors, (4848), 101 states have internal predecessors, (4848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:34,072 INFO L186 Difference]: Start difference. First operand has 301 places, 161 transitions, 1500 flow. Second operand 100 states and 850 transitions. [2021-10-15 19:41:34,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 252 transitions, 2219 flow [2021-10-15 19:41:34,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 252 transitions, 1899 flow, removed 15 selfloop flow, removed 97 redundant places. [2021-10-15 19:41:34,112 INFO L242 Difference]: Finished difference. Result has 304 places, 163 transitions, 1524 flow [2021-10-15 19:41:34,112 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1182, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=100, PETRI_FLOW=1524, PETRI_PLACES=304, PETRI_TRANSITIONS=163} [2021-10-15 19:41:34,112 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 279 predicate places. [2021-10-15 19:41:34,112 INFO L470 AbstractCegarLoop]: Abstraction has has 304 places, 163 transitions, 1524 flow [2021-10-15 19:41:34,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 7.97029702970297) internal successors, (805), 101 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:34,113 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:34,113 INFO L254 CegarLoopForPetriNet]: trace histogram [89, 48, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:41:34,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-10-15 19:41:34,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-10-15 19:41:34,313 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:34,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:34,314 INFO L82 PathProgramCache]: Analyzing trace with hash 49472948, now seen corresponding path program 51 times [2021-10-15 19:41:34,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:41:34,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288822111] [2021-10-15 19:41:34,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:34,314 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:41:34,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:37,596 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:41:37,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:41:37,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288822111] [2021-10-15 19:41:37,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288822111] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:41:37,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803862262] [2021-10-15 19:41:37,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:41:37,597 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:41:37,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:41:37,598 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:41:37,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-10-15 19:41:39,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 90 check-sat command(s) [2021-10-15 19:41:39,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:41:39,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 100 conjunts are in the unsatisfiable core [2021-10-15 19:41:39,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:41:40,009 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:41:40,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803862262] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:41:40,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:41:40,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 102 [2021-10-15 19:41:40,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016332078] [2021-10-15 19:41:40,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2021-10-15 19:41:40,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:41:40,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-10-15 19:41:40,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2021-10-15 19:41:40,015 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:41:40,015 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 163 transitions, 1524 flow. Second operand has 102 states, 102 states have (on average 7.970588235294118) internal successors, (813), 102 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:40,016 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:40,016 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:41:40,016 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:40,883 INFO L129 PetriNetUnfolder]: 51/255 cut-off events. [2021-10-15 19:41:40,883 INFO L130 PetriNetUnfolder]: For 3114/3114 co-relation queries the response was YES. [2021-10-15 19:41:40,884 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1239 conditions, 255 events. 51/255 cut-off events. For 3114/3114 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 52 event pairs, 0 based on Foata normal form. 1/256 useless extension candidates. Maximal degree in co-relation 1022. Up to 142 conditions per place. [2021-10-15 19:41:40,885 INFO L132 encePairwiseOnDemand]: 35/48 looper letters, 103 selfloop transitions, 149 changer transitions 0/255 dead transitions. [2021-10-15 19:41:40,885 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 255 transitions, 2253 flow [2021-10-15 19:41:40,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-10-15 19:41:40,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2021-10-15 19:41:40,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 859 transitions. [2021-10-15 19:41:40,887 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.1771864686468647 [2021-10-15 19:41:40,887 INFO L72 ComplementDD]: Start complementDD. Operand 101 states and 859 transitions. [2021-10-15 19:41:40,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 101 states and 859 transitions. [2021-10-15 19:41:40,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:40,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 101 states and 859 transitions. [2021-10-15 19:41:40,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 102 states, 101 states have (on average 8.504950495049505) internal successors, (859), 101 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:40,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 102 states, 102 states have (on average 48.0) internal successors, (4896), 102 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:40,894 INFO L81 ComplementDD]: Finished complementDD. Result has 102 states, 102 states have (on average 48.0) internal successors, (4896), 102 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:40,894 INFO L186 Difference]: Start difference. First operand has 304 places, 163 transitions, 1524 flow. Second operand 101 states and 859 transitions. [2021-10-15 19:41:40,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 255 transitions, 2253 flow [2021-10-15 19:41:40,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 255 transitions, 1927 flow, removed 16 selfloop flow, removed 98 redundant places. [2021-10-15 19:41:40,941 INFO L242 Difference]: Finished difference. Result has 307 places, 165 transitions, 1548 flow [2021-10-15 19:41:40,942 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1200, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=101, PETRI_FLOW=1548, PETRI_PLACES=307, PETRI_TRANSITIONS=165} [2021-10-15 19:41:40,942 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 282 predicate places. [2021-10-15 19:41:40,942 INFO L470 AbstractCegarLoop]: Abstraction has has 307 places, 165 transitions, 1548 flow [2021-10-15 19:41:40,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 7.970588235294118) internal successors, (813), 102 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:40,942 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:40,942 INFO L254 CegarLoopForPetriNet]: trace histogram [90, 49, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:41:40,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-10-15 19:41:41,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-10-15 19:41:41,143 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:41,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:41,143 INFO L82 PathProgramCache]: Analyzing trace with hash 291324334, now seen corresponding path program 52 times [2021-10-15 19:41:41,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:41:41,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712838916] [2021-10-15 19:41:41,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:41,144 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:41:41,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:44,564 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:41:44,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:41:44,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712838916] [2021-10-15 19:41:44,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712838916] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:41:44,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532504865] [2021-10-15 19:41:44,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 19:41:44,565 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:41:44,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:41:44,566 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:41:44,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-10-15 19:41:46,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 19:41:46,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:41:46,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 101 conjunts are in the unsatisfiable core [2021-10-15 19:41:46,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:41:46,863 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:41:46,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532504865] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:41:46,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:41:46,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 103 [2021-10-15 19:41:46,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115294396] [2021-10-15 19:41:46,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2021-10-15 19:41:46,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:41:46,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-10-15 19:41:46,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2021-10-15 19:41:46,868 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:41:46,868 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 165 transitions, 1548 flow. Second operand has 103 states, 103 states have (on average 7.970873786407767) internal successors, (821), 103 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:46,868 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:46,869 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:41:46,869 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:47,708 INFO L129 PetriNetUnfolder]: 51/256 cut-off events. [2021-10-15 19:41:47,708 INFO L130 PetriNetUnfolder]: For 3015/3015 co-relation queries the response was YES. [2021-10-15 19:41:47,710 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1232 conditions, 256 events. 51/256 cut-off events. For 3015/3015 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 51 event pairs, 0 based on Foata normal form. 1/257 useless extension candidates. Maximal degree in co-relation 1021. Up to 142 conditions per place. [2021-10-15 19:41:47,711 INFO L132 encePairwiseOnDemand]: 34/48 looper letters, 102 selfloop transitions, 151 changer transitions 0/256 dead transitions. [2021-10-15 19:41:47,711 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 256 transitions, 2236 flow [2021-10-15 19:41:47,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-10-15 19:41:47,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2021-10-15 19:41:47,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 866 transitions. [2021-10-15 19:41:47,713 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.17687908496732027 [2021-10-15 19:41:47,713 INFO L72 ComplementDD]: Start complementDD. Operand 102 states and 866 transitions. [2021-10-15 19:41:47,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 102 states and 866 transitions. [2021-10-15 19:41:47,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:47,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 102 states and 866 transitions. [2021-10-15 19:41:47,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 103 states, 102 states have (on average 8.490196078431373) internal successors, (866), 102 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:47,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 103 states, 103 states have (on average 48.0) internal successors, (4944), 103 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:47,718 INFO L81 ComplementDD]: Finished complementDD. Result has 103 states, 103 states have (on average 48.0) internal successors, (4944), 103 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:47,718 INFO L186 Difference]: Start difference. First operand has 307 places, 165 transitions, 1548 flow. Second operand 102 states and 866 transitions. [2021-10-15 19:41:47,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 256 transitions, 2236 flow [2021-10-15 19:41:47,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 256 transitions, 1906 flow, removed 17 selfloop flow, removed 99 redundant places. [2021-10-15 19:41:47,762 INFO L242 Difference]: Finished difference. Result has 311 places, 166 transitions, 1533 flow [2021-10-15 19:41:47,762 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1218, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=102, PETRI_FLOW=1533, PETRI_PLACES=311, PETRI_TRANSITIONS=166} [2021-10-15 19:41:47,762 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 286 predicate places. [2021-10-15 19:41:47,762 INFO L470 AbstractCegarLoop]: Abstraction has has 311 places, 166 transitions, 1533 flow [2021-10-15 19:41:47,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 7.970873786407767) internal successors, (821), 103 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:47,763 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:47,763 INFO L254 CegarLoopForPetriNet]: trace histogram [91, 50, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:41:47,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-10-15 19:41:47,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-10-15 19:41:47,963 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:47,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:47,964 INFO L82 PathProgramCache]: Analyzing trace with hash 782272296, now seen corresponding path program 53 times [2021-10-15 19:41:47,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:41:47,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875462812] [2021-10-15 19:41:47,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:47,964 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:41:48,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:49,537 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 6559 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2021-10-15 19:41:49,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:41:49,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875462812] [2021-10-15 19:41:49,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875462812] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:41:49,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670673040] [2021-10-15 19:41:49,538 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-15 19:41:49,538 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:41:49,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:41:49,539 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:41:49,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-10-15 19:41:51,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 92 check-sat command(s) [2021-10-15 19:41:51,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:41:51,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 105 conjunts are in the unsatisfiable core [2021-10-15 19:41:51,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:41:53,115 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 6559 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2021-10-15 19:41:53,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670673040] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:41:53,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:41:53,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2021-10-15 19:41:53,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549210909] [2021-10-15 19:41:53,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-10-15 19:41:53,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:41:53,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-10-15 19:41:53,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=2862, Unknown=0, NotChecked=0, Total=2970 [2021-10-15 19:41:53,120 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 48 [2021-10-15 19:41:53,122 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 166 transitions, 1533 flow. Second operand has 55 states, 55 states have (on average 34.0) internal successors, (1870), 55 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:53,122 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:53,122 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 48 [2021-10-15 19:41:53,122 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:55,414 INFO L129 PetriNetUnfolder]: 1376/4233 cut-off events. [2021-10-15 19:41:55,415 INFO L130 PetriNetUnfolder]: For 81156/81156 co-relation queries the response was YES. [2021-10-15 19:41:55,467 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20329 conditions, 4233 events. 1376/4233 cut-off events. For 81156/81156 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 26423 event pairs, 0 based on Foata normal form. 1/4234 useless extension candidates. Maximal degree in co-relation 19752. Up to 2792 conditions per place. [2021-10-15 19:41:55,491 INFO L132 encePairwiseOnDemand]: 44/48 looper letters, 52 selfloop transitions, 1326 changer transitions 1/1492 dead transitions. [2021-10-15 19:41:55,492 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 1492 transitions, 17674 flow [2021-10-15 19:41:55,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-15 19:41:55,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-10-15 19:41:55,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 1839 transitions. [2021-10-15 19:41:55,493 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7094907407407407 [2021-10-15 19:41:55,493 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 1839 transitions. [2021-10-15 19:41:55,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 1839 transitions. [2021-10-15 19:41:55,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:55,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 1839 transitions. [2021-10-15 19:41:55,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 34.05555555555556) internal successors, (1839), 54 states have internal predecessors, (1839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:55,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 48.0) internal successors, (2640), 55 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:55,501 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 48.0) internal successors, (2640), 55 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:55,501 INFO L186 Difference]: Start difference. First operand has 311 places, 166 transitions, 1533 flow. Second operand 54 states and 1839 transitions. [2021-10-15 19:41:55,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 1492 transitions, 17674 flow [2021-10-15 19:41:55,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 1492 transitions, 14598 flow, removed 54 selfloop flow, removed 101 redundant places. [2021-10-15 19:41:55,951 INFO L242 Difference]: Finished difference. Result has 265 places, 1491 transitions, 14594 flow [2021-10-15 19:41:55,951 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1187, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=14594, PETRI_PLACES=265, PETRI_TRANSITIONS=1491} [2021-10-15 19:41:55,952 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 240 predicate places. [2021-10-15 19:41:55,952 INFO L470 AbstractCegarLoop]: Abstraction has has 265 places, 1491 transitions, 14594 flow [2021-10-15 19:41:55,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 34.0) internal successors, (1870), 55 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:55,952 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:55,953 INFO L254 CegarLoopForPetriNet]: trace histogram [92, 51, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:41:55,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-10-15 19:41:56,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:41:56,165 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:56,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:56,166 INFO L82 PathProgramCache]: Analyzing trace with hash 136861218, now seen corresponding path program 54 times [2021-10-15 19:41:56,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:41:56,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556326103] [2021-10-15 19:41:56,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:56,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:41:56,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:57,373 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 6742 proven. 0 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2021-10-15 19:41:57,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:41:57,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556326103] [2021-10-15 19:41:57,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556326103] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:41:57,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:41:57,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2021-10-15 19:41:57,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163540494] [2021-10-15 19:41:57,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-10-15 19:41:57,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:41:57,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-10-15 19:41:57,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-10-15 19:41:57,376 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 48 [2021-10-15 19:41:57,377 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 1491 transitions, 14594 flow. Second operand has 52 states, 52 states have (on average 8.365384615384615) internal successors, (435), 52 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:57,377 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:57,377 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 48 [2021-10-15 19:41:57,377 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:57,825 INFO L129 PetriNetUnfolder]: 1/203 cut-off events. [2021-10-15 19:41:57,825 INFO L130 PetriNetUnfolder]: For 1509/1509 co-relation queries the response was YES. [2021-10-15 19:41:57,827 INFO L84 FinitePrefix]: Finished finitePrefix Result has 896 conditions, 203 events. 1/203 cut-off events. For 1509/1509 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 1 event pairs, 0 based on Foata normal form. 50/253 useless extension candidates. Maximal degree in co-relation 799. Up to 104 conditions per place. [2021-10-15 19:41:57,828 INFO L132 encePairwiseOnDemand]: 45/48 looper letters, 0 selfloop transitions, 0 changer transitions 162/162 dead transitions. [2021-10-15 19:41:57,828 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 162 transitions, 1353 flow [2021-10-15 19:41:57,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-10-15 19:41:57,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-10-15 19:41:57,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 482 transitions. [2021-10-15 19:41:57,832 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.19310897435897437 [2021-10-15 19:41:57,832 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 482 transitions. [2021-10-15 19:41:57,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 482 transitions. [2021-10-15 19:41:57,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:57,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 482 transitions. [2021-10-15 19:41:57,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 9.26923076923077) internal successors, (482), 52 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:57,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 48.0) internal successors, (2544), 53 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:57,835 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 48.0) internal successors, (2544), 53 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:57,835 INFO L186 Difference]: Start difference. First operand has 265 places, 1491 transitions, 14594 flow. Second operand 52 states and 482 transitions. [2021-10-15 19:41:57,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 162 transitions, 1353 flow [2021-10-15 19:41:57,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 162 transitions, 1149 flow, removed 0 selfloop flow, removed 103 redundant places. [2021-10-15 19:41:57,861 INFO L242 Difference]: Finished difference. Result has 209 places, 0 transitions, 0 flow [2021-10-15 19:41:57,861 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=0, PETRI_PLACES=209, PETRI_TRANSITIONS=0} [2021-10-15 19:41:57,861 INFO L334 CegarLoopForPetriNet]: 25 programPoint places, 184 predicate places. [2021-10-15 19:41:57,862 INFO L470 AbstractCegarLoop]: Abstraction has has 209 places, 0 transitions, 0 flow [2021-10-15 19:41:57,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 8.365384615384615) internal successors, (435), 52 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:57,864 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:41:57,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-10-15 19:41:57,869 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:41:57,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:41:57 BoogieIcfgContainer [2021-10-15 19:41:57,872 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:41:57,873 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:41:57,873 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:41:57,873 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:41:57,873 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:39:16" (3/4) ... [2021-10-15 19:41:57,876 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:41:57,888 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-15 19:41:57,889 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 19:41:57,889 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:41:57,889 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:41:57,943 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:41:57,943 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:41:57,945 INFO L168 Benchmark]: Toolchain (without parser) took 162356.35 ms. Allocated memory was 121.6 MB in the beginning and 1.4 GB in the end (delta: 1.2 GB). Free memory was 90.1 MB in the beginning and 648.1 MB in the end (delta: -558.0 MB). Peak memory consumption was 677.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:41:57,945 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 121.6 MB. Free memory was 73.6 MB in the beginning and 73.6 MB in the end (delta: 63.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:41:57,946 INFO L168 Benchmark]: CACSL2BoogieTranslator took 294.01 ms. Allocated memory is still 121.6 MB. Free memory was 89.8 MB in the beginning and 93.6 MB in the end (delta: -3.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:41:57,946 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.48 ms. Allocated memory is still 121.6 MB. Free memory was 93.6 MB in the beginning and 92.0 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:41:57,946 INFO L168 Benchmark]: Boogie Preprocessor took 21.59 ms. Allocated memory is still 121.6 MB. Free memory was 92.0 MB in the beginning and 90.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:41:57,947 INFO L168 Benchmark]: RCFGBuilder took 407.11 ms. Allocated memory is still 121.6 MB. Free memory was 90.9 MB in the beginning and 79.3 MB in the end (delta: 11.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:41:57,947 INFO L168 Benchmark]: TraceAbstraction took 161516.29 ms. Allocated memory was 121.6 MB in the beginning and 1.4 GB in the end (delta: 1.2 GB). Free memory was 79.0 MB in the beginning and 651.2 MB in the end (delta: -572.2 MB). Peak memory consumption was 666.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:41:57,948 INFO L168 Benchmark]: Witness Printer took 70.80 ms. Allocated memory is still 1.4 GB. Free memory was 651.2 MB in the beginning and 648.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:41:57,950 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 121.6 MB. Free memory was 73.6 MB in the beginning and 73.6 MB in the end (delta: 63.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 294.01 ms. Allocated memory is still 121.6 MB. Free memory was 89.8 MB in the beginning and 93.6 MB in the end (delta: -3.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.48 ms. Allocated memory is still 121.6 MB. Free memory was 93.6 MB in the beginning and 92.0 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.59 ms. Allocated memory is still 121.6 MB. Free memory was 92.0 MB in the beginning and 90.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 407.11 ms. Allocated memory is still 121.6 MB. Free memory was 90.9 MB in the beginning and 79.3 MB in the end (delta: 11.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 161516.29 ms. Allocated memory was 121.6 MB in the beginning and 1.4 GB in the end (delta: 1.2 GB). Free memory was 79.0 MB in the beginning and 651.2 MB in the end (delta: -572.2 MB). Peak memory consumption was 666.4 MB. Max. memory is 16.1 GB. * Witness Printer took 70.80 ms. Allocated memory is still 1.4 GB. Free memory was 651.2 MB in the beginning and 648.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 96]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 7.1ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 161424.6ms, OverallIterations: 62, TraceHistogramMax: 92, EmptinessCheckTime: 0.0ms, AutomataDifference: 22179.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 56.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 232 SDtfs, 3466 SDslu, 51 SDs, 0 SdLazy, 11830 SolverSat, 8182 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 8050.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8970 GetRequests, 6141 SyntacticMatches, 6 SemanticMatches, 2823 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3035 ImplicationChecksByTransitivity, 63041.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=14594occurred in iteration=61, InterpolantAutomatonStates: 2913, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 534.2ms SsaConstructionTime, 4131.2ms SatisfiabilityAnalysisTime, 85942.6ms InterpolantComputationTime, 13187 NumberOfCodeBlocks, 13127 NumberOfCodeBlocksAsserted, 1399 NumberOfCheckSat, 13072 ConstructedInterpolants, 0 QuantifiedInterpolants, 33017 SizeOfPredicates, 2 NumberOfNonLiveVariables, 17099 ConjunctsInSsa, 2131 ConjunctsInUnsatCore, 115 InterpolantComputations, 9 PerfectInterpolantSequences, 138585/345523 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 19:41:57,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bc31d8-3e6d-4631-a71f-ba252c197a97/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...