./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound50.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_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/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_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/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_7f948ea2-e007-4378-b92a-83ba1235c455/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 0b8bf2ea6b03a85ab0986e14b8a2b627c39af27a ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 20:06:54,181 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 20:06:54,183 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 20:06:54,218 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 20:06:54,218 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 20:06:54,220 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 20:06:54,222 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 20:06:54,224 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 20:06:54,227 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 20:06:54,228 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 20:06:54,229 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 20:06:54,231 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 20:06:54,231 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 20:06:54,233 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 20:06:54,234 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 20:06:54,236 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 20:06:54,237 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 20:06:54,241 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 20:06:54,243 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 20:06:54,246 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 20:06:54,248 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 20:06:54,250 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 20:06:54,252 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 20:06:54,253 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 20:06:54,257 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 20:06:54,258 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 20:06:54,258 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 20:06:54,259 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 20:06:54,260 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 20:06:54,261 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 20:06:54,262 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 20:06:54,263 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 20:06:54,264 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 20:06:54,265 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 20:06:54,266 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 20:06:54,267 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 20:06:54,268 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 20:06:54,268 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 20:06:54,269 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 20:06:54,270 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 20:06:54,271 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 20:06:54,272 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 20:06:54,300 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 20:06:54,300 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 20:06:54,301 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 20:06:54,301 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 20:06:54,302 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 20:06:54,303 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 20:06:54,303 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 20:06:54,303 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 20:06:54,304 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 20:06:54,304 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 20:06:54,304 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 20:06:54,304 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 20:06:54,305 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 20:06:54,305 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 20:06:54,305 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 20:06:54,305 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 20:06:54,306 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 20:06:54,306 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 20:06:54,306 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 20:06:54,306 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 20:06:54,307 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 20:06:54,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 20:06:54,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:06:54,307 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 20:06:54,308 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 20:06:54,308 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 20:06:54,308 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 20:06:54,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 20:06:54,309 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 20:06:54,309 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 20:06:54,309 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 20:06:54,309 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 20:06:54,310 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_7f948ea2-e007-4378-b92a-83ba1235c455/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b8bf2ea6b03a85ab0986e14b8a2b627c39af27a [2021-10-15 20:06:54,567 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 20:06:54,600 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 20:06:54,605 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 20:06:54,607 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 20:06:54,607 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 20:06:54,608 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound50.c [2021-10-15 20:06:54,669 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/data/18ffbfb2b/38d0292682cf402389e432876d1dd635/FLAG8c215683a [2021-10-15 20:06:55,080 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 20:06:55,081 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound50.c [2021-10-15 20:06:55,087 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/data/18ffbfb2b/38d0292682cf402389e432876d1dd635/FLAG8c215683a [2021-10-15 20:06:55,100 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/data/18ffbfb2b/38d0292682cf402389e432876d1dd635 [2021-10-15 20:06:55,103 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 20:06:55,104 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 20:06:55,106 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 20:06:55,106 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 20:06:55,112 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 20:06:55,113 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:06:55" (1/1) ... [2021-10-15 20:06:55,114 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ff42176 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:06:55, skipping insertion in model container [2021-10-15 20:06:55,115 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:06:55" (1/1) ... [2021-10-15 20:06:55,122 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 20:06:55,139 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 20:06:55,351 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_7f948ea2-e007-4378-b92a-83ba1235c455/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound50.c[537,550] [2021-10-15 20:06:55,368 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:06:55,384 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 20:06:55,399 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_7f948ea2-e007-4378-b92a-83ba1235c455/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound50.c[537,550] [2021-10-15 20:06:55,417 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:06:55,433 INFO L208 MainTranslator]: Completed translation [2021-10-15 20:06:55,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:06:55 WrapperNode [2021-10-15 20:06:55,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 20:06:55,436 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 20:06:55,436 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 20:06:55,437 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 20:06:55,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:06:55" (1/1) ... [2021-10-15 20:06:55,456 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:06:55" (1/1) ... [2021-10-15 20:06:55,479 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 20:06:55,480 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 20:06:55,480 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 20:06:55,483 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 20:06:55,491 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:06:55" (1/1) ... [2021-10-15 20:06:55,491 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:06:55" (1/1) ... [2021-10-15 20:06:55,493 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:06:55" (1/1) ... [2021-10-15 20:06:55,493 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:06:55" (1/1) ... [2021-10-15 20:06:55,497 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:06:55" (1/1) ... [2021-10-15 20:06:55,500 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:06:55" (1/1) ... [2021-10-15 20:06:55,501 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:06:55" (1/1) ... [2021-10-15 20:06:55,503 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 20:06:55,504 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 20:06:55,504 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 20:06:55,505 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 20:06:55,506 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:06:55" (1/1) ... [2021-10-15 20:06:55,513 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:06:55,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:06:55,544 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 20:06:55,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 20:06:55,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 20:06:55,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 20:06:55,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 20:06:55,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 20:06:55,818 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 20:06:55,821 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-10-15 20:06:55,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:06:55 BoogieIcfgContainer [2021-10-15 20:06:55,823 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 20:06:55,825 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 20:06:55,825 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 20:06:55,829 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 20:06:55,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 08:06:55" (1/3) ... [2021-10-15 20:06:55,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5458a0b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:06:55, skipping insertion in model container [2021-10-15 20:06:55,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:06:55" (2/3) ... [2021-10-15 20:06:55,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5458a0b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:06:55, skipping insertion in model container [2021-10-15 20:06:55,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:06:55" (3/3) ... [2021-10-15 20:06:55,840 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound50.c [2021-10-15 20:06:55,859 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 20:06:55,860 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-15 20:06:55,908 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 20:06:55,915 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 20:06:55,915 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-15 20:06:55,925 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 23 places, 31 transitions, 62 flow [2021-10-15 20:06:55,950 INFO L129 PetriNetUnfolder]: 9/31 cut-off events. [2021-10-15 20:06:55,950 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:06:55,952 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32 conditions, 31 events. 9/31 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 35 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-10-15 20:06:55,953 INFO L82 GeneralOperation]: Start removeDead. Operand has 23 places, 31 transitions, 62 flow [2021-10-15 20:06:55,958 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 19 places, 26 transitions, 52 flow [2021-10-15 20:06:55,964 INFO L129 PetriNetUnfolder]: 7/22 cut-off events. [2021-10-15 20:06:55,964 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:06:55,964 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:06:55,965 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:06:55,966 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:06:55,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:06:55,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1507472743, now seen corresponding path program 1 times [2021-10-15 20:06:55,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:06:55,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712904452] [2021-10-15 20:06:55,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:06:55,980 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:06:56,097 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:06:56,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [695950742] [2021-10-15 20:06:56,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:06:56,098 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:06:56,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:06:56,100 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:06:56,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 20:06:56,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:06:56,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-15 20:06:56,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:06:56,356 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 20:06:56,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:06:56,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712904452] [2021-10-15 20:06:56,357 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:06:56,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695950742] [2021-10-15 20:06:56,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695950742] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:06:56,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:06:56,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 20:06:56,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26767709] [2021-10-15 20:06:56,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:06:56,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:06:56,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:06:56,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:06:56,387 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2021-10-15 20:06:56,390 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 26 transitions, 52 flow. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:06:56,390 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:06:56,390 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2021-10-15 20:06:56,391 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:06:56,455 INFO L129 PetriNetUnfolder]: 3/32 cut-off events. [2021-10-15 20:06:56,455 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:06:56,455 INFO L84 FinitePrefix]: Finished finitePrefix Result has 59 conditions, 32 events. 3/32 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 25 event pairs, 0 based on Foata normal form. 4/31 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2021-10-15 20:06:56,457 INFO L132 encePairwiseOnDemand]: 19/31 looper letters, 19 selfloop transitions, 6 changer transitions 0/31 dead transitions. [2021-10-15 20:06:56,457 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 31 transitions, 112 flow [2021-10-15 20:06:56,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:06:56,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 20:06:56,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 81 transitions. [2021-10-15 20:06:56,469 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5225806451612903 [2021-10-15 20:06:56,470 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 81 transitions. [2021-10-15 20:06:56,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 81 transitions. [2021-10-15 20:06:56,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:06:56,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 81 transitions. [2021-10-15 20:06:56,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:06:56,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:06:56,481 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:06:56,483 INFO L186 Difference]: Start difference. First operand has 19 places, 26 transitions, 52 flow. Second operand 5 states and 81 transitions. [2021-10-15 20:06:56,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 31 transitions, 112 flow [2021-10-15 20:06:56,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 31 transitions, 112 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:06:56,507 INFO L242 Difference]: Finished difference. Result has 24 places, 25 transitions, 76 flow [2021-10-15 20:06:56,509 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=76, PETRI_PLACES=24, PETRI_TRANSITIONS=25} [2021-10-15 20:06:56,510 INFO L334 CegarLoopForPetriNet]: 19 programPoint places, 5 predicate places. [2021-10-15 20:06:56,510 INFO L470 AbstractCegarLoop]: Abstraction has has 24 places, 25 transitions, 76 flow [2021-10-15 20:06:56,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:06:56,511 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:06:56,511 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:06:56,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 20:06:56,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:06:56,712 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:06:56,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:06:56,713 INFO L82 PathProgramCache]: Analyzing trace with hash -937526112, now seen corresponding path program 1 times [2021-10-15 20:06:56,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:06:56,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300009135] [2021-10-15 20:06:56,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:06:56,714 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:06:56,753 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:06:56,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1978821463] [2021-10-15 20:06:56,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:06:56,754 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:06:56,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:06:56,755 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:06:56,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 20:06:56,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:06:56,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 20:06:56,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:06:56,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:06:56,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:06:56,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300009135] [2021-10-15 20:06:56,943 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:06:56,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978821463] [2021-10-15 20:06:56,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978821463] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:06:56,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:06:56,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 20:06:56,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179321994] [2021-10-15 20:06:56,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:06:56,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:06:56,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:06:56,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:06:56,948 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 31 [2021-10-15 20:06:56,948 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 25 transitions, 76 flow. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:06:56,949 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:06:56,949 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 31 [2021-10-15 20:06:56,949 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:06:57,018 INFO L129 PetriNetUnfolder]: 3/28 cut-off events. [2021-10-15 20:06:57,019 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:06:57,020 INFO L84 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 28 events. 3/28 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 17 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 21. Up to 12 conditions per place. [2021-10-15 20:06:57,020 INFO L132 encePairwiseOnDemand]: 25/31 looper letters, 15 selfloop transitions, 5 changer transitions 0/26 dead transitions. [2021-10-15 20:06:57,020 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 26 transitions, 115 flow [2021-10-15 20:06:57,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:06:57,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 20:06:57,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 70 transitions. [2021-10-15 20:06:57,025 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2021-10-15 20:06:57,025 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 70 transitions. [2021-10-15 20:06:57,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 70 transitions. [2021-10-15 20:06:57,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:06:57,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 70 transitions. [2021-10-15 20:06:57,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 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 20:06:57,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:06:57,032 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:06:57,032 INFO L186 Difference]: Start difference. First operand has 24 places, 25 transitions, 76 flow. Second operand 5 states and 70 transitions. [2021-10-15 20:06:57,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 26 transitions, 115 flow [2021-10-15 20:06:57,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 26 transitions, 113 flow, removed 1 selfloop flow, removed 0 redundant places. [2021-10-15 20:06:57,035 INFO L242 Difference]: Finished difference. Result has 29 places, 24 transitions, 84 flow [2021-10-15 20:06:57,035 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=84, PETRI_PLACES=29, PETRI_TRANSITIONS=24} [2021-10-15 20:06:57,036 INFO L334 CegarLoopForPetriNet]: 19 programPoint places, 10 predicate places. [2021-10-15 20:06:57,036 INFO L470 AbstractCegarLoop]: Abstraction has has 29 places, 24 transitions, 84 flow [2021-10-15 20:06:57,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:06:57,036 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:06:57,036 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:06:57,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 20:06:57,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-10-15 20:06:57,262 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:06:57,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:06:57,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1032018498, now seen corresponding path program 1 times [2021-10-15 20:06:57,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:06:57,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737210619] [2021-10-15 20:06:57,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:06:57,263 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:06:57,295 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:06:57,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [753366429] [2021-10-15 20:06:57,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:06:57,296 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:06:57,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:06:57,312 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:06:57,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 20:06:57,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:06:57,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-15 20:06:57,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:07:00,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:07:00,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:07:00,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737210619] [2021-10-15 20:07:00,407 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:07:00,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753366429] [2021-10-15 20:07:00,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753366429] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:07:00,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:07:00,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-15 20:07:00,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069256607] [2021-10-15 20:07:00,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 20:07:00,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:07:00,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 20:07:00,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-10-15 20:07:00,411 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2021-10-15 20:07:00,411 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 84 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 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 20:07:00,411 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:07:00,412 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2021-10-15 20:07:00,412 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:07:00,763 INFO L129 PetriNetUnfolder]: 4/36 cut-off events. [2021-10-15 20:07:00,763 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-15 20:07:00,764 INFO L84 FinitePrefix]: Finished finitePrefix Result has 100 conditions, 36 events. 4/36 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 46 event pairs, 0 based on Foata normal form. 2/38 useless extension candidates. Maximal degree in co-relation 33. Up to 13 conditions per place. [2021-10-15 20:07:00,764 INFO L132 encePairwiseOnDemand]: 22/31 looper letters, 21 selfloop transitions, 11 changer transitions 0/35 dead transitions. [2021-10-15 20:07:00,764 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 35 transitions, 180 flow [2021-10-15 20:07:00,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 20:07:00,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-15 20:07:00,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 87 transitions. [2021-10-15 20:07:00,767 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3118279569892473 [2021-10-15 20:07:00,767 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 87 transitions. [2021-10-15 20:07:00,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 87 transitions. [2021-10-15 20:07:00,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:07:00,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 87 transitions. [2021-10-15 20:07:00,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:07:00,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 31.0) internal successors, (310), 10 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:07:00,770 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 31.0) internal successors, (310), 10 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:07:00,770 INFO L186 Difference]: Start difference. First operand has 29 places, 24 transitions, 84 flow. Second operand 9 states and 87 transitions. [2021-10-15 20:07:00,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 35 transitions, 180 flow [2021-10-15 20:07:00,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 35 transitions, 170 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-10-15 20:07:00,773 INFO L242 Difference]: Finished difference. Result has 36 places, 29 transitions, 139 flow [2021-10-15 20:07:00,773 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=139, PETRI_PLACES=36, PETRI_TRANSITIONS=29} [2021-10-15 20:07:00,773 INFO L334 CegarLoopForPetriNet]: 19 programPoint places, 17 predicate places. [2021-10-15 20:07:00,774 INFO L470 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 139 flow [2021-10-15 20:07:00,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 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 20:07:00,774 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:07:00,774 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:07:00,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-10-15 20:07:00,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:07:00,983 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:07:00,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:07:00,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1030171456, now seen corresponding path program 1 times [2021-10-15 20:07:00,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:07:00,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497450448] [2021-10-15 20:07:00,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:00,984 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:07:01,008 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:07:01,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [993354155] [2021-10-15 20:07:01,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:01,009 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:07:01,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:07:01,012 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:07:01,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 20:07:01,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:07:01,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-15 20:07:01,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:07:04,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:07:04,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:07:04,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497450448] [2021-10-15 20:07:04,665 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:07:04,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993354155] [2021-10-15 20:07:04,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993354155] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:07:04,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:07:04,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-15 20:07:04,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208243099] [2021-10-15 20:07:04,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 20:07:04,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:07:04,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 20:07:04,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-15 20:07:04,668 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2021-10-15 20:07:04,668 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 139 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:07:04,668 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:07:04,668 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2021-10-15 20:07:04,668 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:07:06,636 INFO L129 PetriNetUnfolder]: 5/47 cut-off events. [2021-10-15 20:07:06,636 INFO L130 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2021-10-15 20:07:06,637 INFO L84 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 47 events. 5/47 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 59 event pairs, 0 based on Foata normal form. 1/48 useless extension candidates. Maximal degree in co-relation 54. Up to 23 conditions per place. [2021-10-15 20:07:06,637 INFO L132 encePairwiseOnDemand]: 24/31 looper letters, 25 selfloop transitions, 11 changer transitions 0/42 dead transitions. [2021-10-15 20:07:06,637 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 263 flow [2021-10-15 20:07:06,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 20:07:06,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-15 20:07:06,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2021-10-15 20:07:06,640 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.40860215053763443 [2021-10-15 20:07:06,640 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 114 transitions. [2021-10-15 20:07:06,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 114 transitions. [2021-10-15 20:07:06,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:07:06,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 114 transitions. [2021-10-15 20:07:06,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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 20:07:06,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 31.0) internal successors, (310), 10 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:07:06,643 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 31.0) internal successors, (310), 10 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:07:06,643 INFO L186 Difference]: Start difference. First operand has 36 places, 29 transitions, 139 flow. Second operand 9 states and 114 transitions. [2021-10-15 20:07:06,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 263 flow [2021-10-15 20:07:06,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 42 transitions, 247 flow, removed 2 selfloop flow, removed 5 redundant places. [2021-10-15 20:07:06,648 INFO L242 Difference]: Finished difference. Result has 43 places, 35 transitions, 200 flow [2021-10-15 20:07:06,648 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=200, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2021-10-15 20:07:06,649 INFO L334 CegarLoopForPetriNet]: 19 programPoint places, 24 predicate places. [2021-10-15 20:07:06,649 INFO L470 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 200 flow [2021-10-15 20:07:06,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:07:06,649 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:07:06,650 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:07:06,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 20:07:06,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:07:06,875 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:07:06,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:07:06,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1993537895, now seen corresponding path program 1 times [2021-10-15 20:07:06,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:07:06,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118824553] [2021-10-15 20:07:06,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:06,876 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:07:06,889 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:07:06,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [863977713] [2021-10-15 20:07:06,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:06,890 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:07:06,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:07:06,910 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:07:06,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 20:07:07,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:07:07,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-15 20:07:07,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:07:07,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 20:07:07,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:07:07,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118824553] [2021-10-15 20:07:07,285 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:07:07,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863977713] [2021-10-15 20:07:07,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863977713] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:07:07,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:07:07,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 20:07:07,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224616334] [2021-10-15 20:07:07,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 20:07:07,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:07:07,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 20:07:07,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:07:07,287 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2021-10-15 20:07:07,288 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 200 flow. Second operand has 6 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 20:07:07,288 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:07:07,288 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2021-10-15 20:07:07,288 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:07:13,496 INFO L129 PetriNetUnfolder]: 5/44 cut-off events. [2021-10-15 20:07:13,496 INFO L130 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2021-10-15 20:07:13,497 INFO L84 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 44 events. 5/44 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 50 event pairs, 0 based on Foata normal form. 2/46 useless extension candidates. Maximal degree in co-relation 78. Up to 14 conditions per place. [2021-10-15 20:07:13,498 INFO L132 encePairwiseOnDemand]: 25/31 looper letters, 11 selfloop transitions, 15 changer transitions 3/34 dead transitions. [2021-10-15 20:07:13,498 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 34 transitions, 264 flow [2021-10-15 20:07:13,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 20:07:13,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 20:07:13,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 70 transitions. [2021-10-15 20:07:13,500 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3763440860215054 [2021-10-15 20:07:13,500 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 70 transitions. [2021-10-15 20:07:13,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 70 transitions. [2021-10-15 20:07:13,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:07:13,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 70 transitions. [2021-10-15 20:07:13,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 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 20:07:13,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 31.0) internal successors, (217), 7 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 20:07:13,503 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 31.0) internal successors, (217), 7 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 20:07:13,503 INFO L186 Difference]: Start difference. First operand has 43 places, 35 transitions, 200 flow. Second operand 6 states and 70 transitions. [2021-10-15 20:07:13,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 34 transitions, 264 flow [2021-10-15 20:07:13,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 34 transitions, 247 flow, removed 6 selfloop flow, removed 2 redundant places. [2021-10-15 20:07:13,516 INFO L242 Difference]: Finished difference. Result has 45 places, 31 transitions, 215 flow [2021-10-15 20:07:13,516 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=215, PETRI_PLACES=45, PETRI_TRANSITIONS=31} [2021-10-15 20:07:13,517 INFO L334 CegarLoopForPetriNet]: 19 programPoint places, 26 predicate places. [2021-10-15 20:07:13,517 INFO L470 AbstractCegarLoop]: Abstraction has has 45 places, 31 transitions, 215 flow [2021-10-15 20:07:13,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 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 20:07:13,517 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:07:13,518 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:07:13,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-15 20:07:13,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:07:13,751 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:07:13,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:07:13,751 INFO L82 PathProgramCache]: Analyzing trace with hash -184870151, now seen corresponding path program 2 times [2021-10-15 20:07:13,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:07:13,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554902358] [2021-10-15 20:07:13,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:13,752 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:07:13,771 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:07:13,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1623868902] [2021-10-15 20:07:13,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 20:07:13,775 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:07:13,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:07:13,776 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:07:13,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-15 20:07:13,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 20:07:13,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:07:13,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-15 20:07:13,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:07:28,137 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:07:28,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:07:28,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554902358] [2021-10-15 20:07:28,138 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:07:28,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623868902] [2021-10-15 20:07:28,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623868902] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:07:28,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:07:28,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-15 20:07:28,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029225622] [2021-10-15 20:07:28,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-15 20:07:28,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:07:28,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-15 20:07:28,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-10-15 20:07:28,141 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2021-10-15 20:07:28,141 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 31 transitions, 215 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:07:28,141 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:07:28,141 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2021-10-15 20:07:28,142 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:07:31,030 INFO L129 PetriNetUnfolder]: 6/48 cut-off events. [2021-10-15 20:07:31,030 INFO L130 PetriNetUnfolder]: For 93/93 co-relation queries the response was YES. [2021-10-15 20:07:31,031 INFO L84 FinitePrefix]: Finished finitePrefix Result has 229 conditions, 48 events. 6/48 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 62 event pairs, 0 based on Foata normal form. 1/49 useless extension candidates. Maximal degree in co-relation 129. Up to 22 conditions per place. [2021-10-15 20:07:31,031 INFO L132 encePairwiseOnDemand]: 25/31 looper letters, 23 selfloop transitions, 16 changer transitions 0/44 dead transitions. [2021-10-15 20:07:31,031 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 44 transitions, 390 flow [2021-10-15 20:07:31,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-15 20:07:31,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-15 20:07:31,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 142 transitions. [2021-10-15 20:07:31,041 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3817204301075269 [2021-10-15 20:07:31,041 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 142 transitions. [2021-10-15 20:07:31,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 142 transitions. [2021-10-15 20:07:31,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:07:31,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 142 transitions. [2021-10-15 20:07:31,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 11.833333333333334) internal successors, (142), 12 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:07:31,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 31.0) internal successors, (403), 13 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:07:31,045 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 31.0) internal successors, (403), 13 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:07:31,045 INFO L186 Difference]: Start difference. First operand has 45 places, 31 transitions, 215 flow. Second operand 12 states and 142 transitions. [2021-10-15 20:07:31,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 44 transitions, 390 flow [2021-10-15 20:07:31,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 44 transitions, 366 flow, removed 4 selfloop flow, removed 3 redundant places. [2021-10-15 20:07:31,053 INFO L242 Difference]: Finished difference. Result has 53 places, 37 transitions, 312 flow [2021-10-15 20:07:31,054 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=312, PETRI_PLACES=53, PETRI_TRANSITIONS=37} [2021-10-15 20:07:31,055 INFO L334 CegarLoopForPetriNet]: 19 programPoint places, 34 predicate places. [2021-10-15 20:07:31,055 INFO L470 AbstractCegarLoop]: Abstraction has has 53 places, 37 transitions, 312 flow [2021-10-15 20:07:31,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:07:31,055 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:07:31,055 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:07:31,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-15 20:07:31,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:07:31,275 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:07:31,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:07:31,276 INFO L82 PathProgramCache]: Analyzing trace with hash -183023109, now seen corresponding path program 1 times [2021-10-15 20:07:31,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:07:31,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332629731] [2021-10-15 20:07:31,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:31,276 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:07:31,301 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:07:31,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1282760271] [2021-10-15 20:07:31,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:31,304 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:07:31,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:07:31,308 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:07:31,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-15 20:07:31,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:07:31,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-15 20:07:31,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:07:40,057 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:07:40,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:07:40,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332629731] [2021-10-15 20:07:40,058 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:07:40,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282760271] [2021-10-15 20:07:40,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282760271] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:07:40,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:07:40,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-15 20:07:40,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544809398] [2021-10-15 20:07:40,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-15 20:07:40,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:07:40,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-15 20:07:40,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=83, Unknown=2, NotChecked=0, Total=110 [2021-10-15 20:07:40,061 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2021-10-15 20:07:40,061 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 37 transitions, 312 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:07:40,061 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:07:40,061 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2021-10-15 20:07:40,061 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:07:45,901 INFO L129 PetriNetUnfolder]: 7/55 cut-off events. [2021-10-15 20:07:45,901 INFO L130 PetriNetUnfolder]: For 186/186 co-relation queries the response was YES. [2021-10-15 20:07:45,902 INFO L84 FinitePrefix]: Finished finitePrefix Result has 292 conditions, 55 events. 7/55 cut-off events. For 186/186 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 94 event pairs, 0 based on Foata normal form. 1/56 useless extension candidates. Maximal degree in co-relation 187. Up to 23 conditions per place. [2021-10-15 20:07:45,903 INFO L132 encePairwiseOnDemand]: 23/31 looper letters, 26 selfloop transitions, 16 changer transitions 0/47 dead transitions. [2021-10-15 20:07:45,903 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 47 transitions, 473 flow [2021-10-15 20:07:45,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-15 20:07:45,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-15 20:07:45,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 131 transitions. [2021-10-15 20:07:45,905 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3841642228739003 [2021-10-15 20:07:45,905 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 131 transitions. [2021-10-15 20:07:45,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 131 transitions. [2021-10-15 20:07:45,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:07:45,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 131 transitions. [2021-10-15 20:07:45,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 11.909090909090908) internal successors, (131), 11 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:07:45,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 31.0) internal successors, (372), 12 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:07:45,908 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 31.0) internal successors, (372), 12 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:07:45,908 INFO L186 Difference]: Start difference. First operand has 53 places, 37 transitions, 312 flow. Second operand 11 states and 131 transitions. [2021-10-15 20:07:45,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 47 transitions, 473 flow [2021-10-15 20:07:45,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 47 transitions, 431 flow, removed 13 selfloop flow, removed 6 redundant places. [2021-10-15 20:07:45,914 INFO L242 Difference]: Finished difference. Result has 61 places, 42 transitions, 375 flow [2021-10-15 20:07:45,915 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=375, PETRI_PLACES=61, PETRI_TRANSITIONS=42} [2021-10-15 20:07:45,915 INFO L334 CegarLoopForPetriNet]: 19 programPoint places, 42 predicate places. [2021-10-15 20:07:45,915 INFO L470 AbstractCegarLoop]: Abstraction has has 61 places, 42 transitions, 375 flow [2021-10-15 20:07:45,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:07:45,916 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:07:45,916 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:07:45,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-10-15 20:07:46,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:07:46,143 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:07:46,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:07:46,144 INFO L82 PathProgramCache]: Analyzing trace with hash -576050119, now seen corresponding path program 2 times [2021-10-15 20:07:46,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:07:46,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509987899] [2021-10-15 20:07:46,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:46,144 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:07:46,157 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:07:46,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1887843236] [2021-10-15 20:07:46,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 20:07:46,160 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:07:46,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:07:46,161 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:07:46,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-15 20:07:46,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 20:07:46,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:07:46,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-15 20:07:46,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:07:53,062 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:07:53,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:07:53,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509987899] [2021-10-15 20:07:53,062 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:07:53,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887843236] [2021-10-15 20:07:53,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887843236] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:07:53,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:07:53,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-15 20:07:53,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625622452] [2021-10-15 20:07:53,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-15 20:07:53,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:07:53,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-15 20:07:53,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-10-15 20:07:53,065 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2021-10-15 20:07:53,065 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 42 transitions, 375 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:07:53,066 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:07:53,066 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2021-10-15 20:07:53,066 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:07:53,577 INFO L129 PetriNetUnfolder]: 8/63 cut-off events. [2021-10-15 20:07:53,577 INFO L130 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2021-10-15 20:07:53,578 INFO L84 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 63 events. 8/63 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 138 event pairs, 0 based on Foata normal form. 1/64 useless extension candidates. Maximal degree in co-relation 279. Up to 34 conditions per place. [2021-10-15 20:07:53,579 INFO L132 encePairwiseOnDemand]: 23/31 looper letters, 37 selfloop transitions, 15 changer transitions 0/54 dead transitions. [2021-10-15 20:07:53,579 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 54 transitions, 585 flow [2021-10-15 20:07:53,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-15 20:07:53,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-15 20:07:53,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 101 transitions. [2021-10-15 20:07:53,581 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.2961876832844575 [2021-10-15 20:07:53,582 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 101 transitions. [2021-10-15 20:07:53,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 101 transitions. [2021-10-15 20:07:53,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:07:53,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 101 transitions. [2021-10-15 20:07:53,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 9.181818181818182) internal successors, (101), 11 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:07:53,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 31.0) internal successors, (372), 12 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:07:53,584 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 31.0) internal successors, (372), 12 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:07:53,584 INFO L186 Difference]: Start difference. First operand has 61 places, 42 transitions, 375 flow. Second operand 11 states and 101 transitions. [2021-10-15 20:07:53,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 54 transitions, 585 flow [2021-10-15 20:07:53,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 54 transitions, 556 flow, removed 8 selfloop flow, removed 5 redundant places. [2021-10-15 20:07:53,591 INFO L242 Difference]: Finished difference. Result has 69 places, 47 transitions, 455 flow [2021-10-15 20:07:53,591 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=455, PETRI_PLACES=69, PETRI_TRANSITIONS=47} [2021-10-15 20:07:53,592 INFO L334 CegarLoopForPetriNet]: 19 programPoint places, 50 predicate places. [2021-10-15 20:07:53,592 INFO L470 AbstractCegarLoop]: Abstraction has has 69 places, 47 transitions, 455 flow [2021-10-15 20:07:53,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:07:53,592 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:07:53,592 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:07:53,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-15 20:07:53,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:07:53,806 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:07:53,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:07:53,807 INFO L82 PathProgramCache]: Analyzing trace with hash -577897161, now seen corresponding path program 2 times [2021-10-15 20:07:53,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:07:53,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35602497] [2021-10-15 20:07:53,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:53,807 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:07:53,837 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:07:53,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1968396446] [2021-10-15 20:07:53,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 20:07:53,837 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:07:53,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:07:53,841 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:07:53,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-15 20:07:54,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 20:07:54,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:07:54,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-15 20:07:54,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:07:56,856 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:07:56,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:07:56,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35602497] [2021-10-15 20:07:56,856 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:07:56,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968396446] [2021-10-15 20:07:56,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968396446] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:07:56,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:07:56,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-15 20:07:56,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055026121] [2021-10-15 20:07:56,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-15 20:07:56,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:07:56,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-15 20:07:56,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-10-15 20:07:56,858 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2021-10-15 20:07:56,858 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 47 transitions, 455 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 20:07:56,859 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:07:56,859 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2021-10-15 20:07:56,859 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:07:57,414 INFO L129 PetriNetUnfolder]: 9/70 cut-off events. [2021-10-15 20:07:57,415 INFO L130 PetriNetUnfolder]: For 398/398 co-relation queries the response was YES. [2021-10-15 20:07:57,416 INFO L84 FinitePrefix]: Finished finitePrefix Result has 434 conditions, 70 events. 9/70 cut-off events. For 398/398 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 135 event pairs, 0 based on Foata normal form. 1/71 useless extension candidates. Maximal degree in co-relation 293. Up to 41 conditions per place. [2021-10-15 20:07:57,417 INFO L132 encePairwiseOnDemand]: 23/31 looper letters, 41 selfloop transitions, 15 changer transitions 0/58 dead transitions. [2021-10-15 20:07:57,417 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 58 transitions, 684 flow [2021-10-15 20:07:57,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-15 20:07:57,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-15 20:07:57,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 102 transitions. [2021-10-15 20:07:57,418 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.2991202346041056 [2021-10-15 20:07:57,418 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 102 transitions. [2021-10-15 20:07:57,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 102 transitions. [2021-10-15 20:07:57,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:07:57,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 102 transitions. [2021-10-15 20:07:57,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:07:57,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 31.0) internal successors, (372), 12 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:07:57,421 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 31.0) internal successors, (372), 12 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:07:57,421 INFO L186 Difference]: Start difference. First operand has 69 places, 47 transitions, 455 flow. Second operand 11 states and 102 transitions. [2021-10-15 20:07:57,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 58 transitions, 684 flow [2021-10-15 20:07:57,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 58 transitions, 638 flow, removed 14 selfloop flow, removed 7 redundant places. [2021-10-15 20:07:57,428 INFO L242 Difference]: Finished difference. Result has 75 places, 51 transitions, 524 flow [2021-10-15 20:07:57,429 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=524, PETRI_PLACES=75, PETRI_TRANSITIONS=51} [2021-10-15 20:07:57,429 INFO L334 CegarLoopForPetriNet]: 19 programPoint places, 56 predicate places. [2021-10-15 20:07:57,429 INFO L470 AbstractCegarLoop]: Abstraction has has 75 places, 51 transitions, 524 flow [2021-10-15 20:07:57,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 20:07:57,430 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:07:57,430 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:07:57,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-15 20:07:57,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:07:57,643 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:07:57,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:07:57,643 INFO L82 PathProgramCache]: Analyzing trace with hash 322246368, now seen corresponding path program 3 times [2021-10-15 20:07:57,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:07:57,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134364754] [2021-10-15 20:07:57,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:57,644 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:07:57,669 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:07:57,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1157842398] [2021-10-15 20:07:57,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 20:07:57,673 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:07:57,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:07:57,674 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:07:57,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-15 20:07:57,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-15 20:07:57,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:07:57,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-15 20:07:57,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:07:59,517 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-15 20:07:59,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:07:59,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134364754] [2021-10-15 20:07:59,518 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:07:59,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157842398] [2021-10-15 20:07:59,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157842398] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:07:59,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:07:59,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-15 20:07:59,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904077102] [2021-10-15 20:07:59,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-15 20:07:59,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:07:59,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-15 20:07:59,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-15 20:07:59,520 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2021-10-15 20:07:59,520 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 51 transitions, 524 flow. Second operand has 11 states, 11 states have (on average 10.727272727272727) internal successors, (118), 11 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:07:59,520 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:07:59,520 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2021-10-15 20:07:59,520 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:08:18,516 INFO L129 PetriNetUnfolder]: 11/93 cut-off events. [2021-10-15 20:08:18,516 INFO L130 PetriNetUnfolder]: For 736/736 co-relation queries the response was YES. [2021-10-15 20:08:18,518 INFO L84 FinitePrefix]: Finished finitePrefix Result has 596 conditions, 93 events. 11/93 cut-off events. For 736/736 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 257 event pairs, 0 based on Foata normal form. 2/95 useless extension candidates. Maximal degree in co-relation 320. Up to 29 conditions per place. [2021-10-15 20:08:18,519 INFO L132 encePairwiseOnDemand]: 24/31 looper letters, 15 selfloop transitions, 11 changer transitions 42/73 dead transitions. [2021-10-15 20:08:18,519 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 73 transitions, 928 flow [2021-10-15 20:08:18,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-15 20:08:18,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-15 20:08:18,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 158 transitions. [2021-10-15 20:08:18,523 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3640552995391705 [2021-10-15 20:08:18,523 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 158 transitions. [2021-10-15 20:08:18,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 158 transitions. [2021-10-15 20:08:18,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:08:18,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 158 transitions. [2021-10-15 20:08:18,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 11.285714285714286) internal successors, (158), 14 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:18,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 31.0) internal successors, (465), 15 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:18,527 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 31.0) internal successors, (465), 15 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:18,527 INFO L186 Difference]: Start difference. First operand has 75 places, 51 transitions, 524 flow. Second operand 14 states and 158 transitions. [2021-10-15 20:08:18,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 73 transitions, 928 flow [2021-10-15 20:08:18,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 73 transitions, 861 flow, removed 24 selfloop flow, removed 7 redundant places. [2021-10-15 20:08:18,537 INFO L242 Difference]: Finished difference. Result has 86 places, 30 transitions, 293 flow [2021-10-15 20:08:18,537 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=293, PETRI_PLACES=86, PETRI_TRANSITIONS=30} [2021-10-15 20:08:18,538 INFO L334 CegarLoopForPetriNet]: 19 programPoint places, 67 predicate places. [2021-10-15 20:08:18,538 INFO L470 AbstractCegarLoop]: Abstraction has has 86 places, 30 transitions, 293 flow [2021-10-15 20:08:18,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.727272727272727) internal successors, (118), 11 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:18,538 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:08:18,539 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:08:18,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-15 20:08:18,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-15 20:08:18,755 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:08:18,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:08:18,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1350644320, now seen corresponding path program 3 times [2021-10-15 20:08:18,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:08:18,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762763843] [2021-10-15 20:08:18,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:18,756 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:08:18,769 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:08:18,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [118438930] [2021-10-15 20:08:18,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 20:08:18,785 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:08:18,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:08:18,787 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:08:18,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-15 20:08:19,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-15 20:08:19,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:08:19,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-15 20:08:19,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:08:20,447 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-15 20:08:20,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:08:20,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762763843] [2021-10-15 20:08:20,448 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:08:20,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118438930] [2021-10-15 20:08:20,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118438930] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:08:20,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:08:20,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-15 20:08:20,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387896276] [2021-10-15 20:08:20,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-15 20:08:20,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:08:20,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-15 20:08:20,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-10-15 20:08:20,450 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2021-10-15 20:08:20,451 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 30 transitions, 293 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:20,451 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:08:20,451 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2021-10-15 20:08:20,451 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:08:24,482 INFO L129 PetriNetUnfolder]: 2/37 cut-off events. [2021-10-15 20:08:24,482 INFO L130 PetriNetUnfolder]: For 331/331 co-relation queries the response was YES. [2021-10-15 20:08:24,483 INFO L84 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 37 events. 2/37 cut-off events. For 331/331 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 17 event pairs, 0 based on Foata normal form. 1/38 useless extension candidates. Maximal degree in co-relation 202. Up to 9 conditions per place. [2021-10-15 20:08:24,483 INFO L132 encePairwiseOnDemand]: 23/31 looper letters, 5 selfloop transitions, 16 changer transitions 5/31 dead transitions. [2021-10-15 20:08:24,483 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 31 transitions, 353 flow [2021-10-15 20:08:24,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-15 20:08:24,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-15 20:08:24,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 106 transitions. [2021-10-15 20:08:24,485 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3419354838709677 [2021-10-15 20:08:24,485 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 106 transitions. [2021-10-15 20:08:24,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 106 transitions. [2021-10-15 20:08:24,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:08:24,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 106 transitions. [2021-10-15 20:08:24,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 10.6) internal successors, (106), 10 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 20:08:24,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 31.0) internal successors, (341), 11 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:24,487 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 31.0) internal successors, (341), 11 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:24,488 INFO L186 Difference]: Start difference. First operand has 86 places, 30 transitions, 293 flow. Second operand 10 states and 106 transitions. [2021-10-15 20:08:24,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 31 transitions, 353 flow [2021-10-15 20:08:24,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 31 transitions, 231 flow, removed 43 selfloop flow, removed 24 redundant places. [2021-10-15 20:08:24,492 INFO L242 Difference]: Finished difference. Result has 52 places, 26 transitions, 177 flow [2021-10-15 20:08:24,492 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=177, PETRI_PLACES=52, PETRI_TRANSITIONS=26} [2021-10-15 20:08:24,492 INFO L334 CegarLoopForPetriNet]: 19 programPoint places, 33 predicate places. [2021-10-15 20:08:24,493 INFO L470 AbstractCegarLoop]: Abstraction has has 52 places, 26 transitions, 177 flow [2021-10-15 20:08:24,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:24,493 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:08:24,493 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:08:24,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-15 20:08:24,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-15 20:08:24,719 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:08:24,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:08:24,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1348797278, now seen corresponding path program 3 times [2021-10-15 20:08:24,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:08:24,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490459097] [2021-10-15 20:08:24,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:24,720 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:08:24,728 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:08:24,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1494311273] [2021-10-15 20:08:24,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 20:08:24,728 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:08:24,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:08:24,730 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:08:24,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-15 20:08:24,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-15 20:08:24,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:08:24,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-15 20:08:24,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:08:28,646 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:08:28,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:08:28,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490459097] [2021-10-15 20:08:28,647 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:08:28,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494311273] [2021-10-15 20:08:28,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494311273] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:08:28,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:08:28,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-10-15 20:08:28,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629950271] [2021-10-15 20:08:28,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-15 20:08:28,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:08:28,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-15 20:08:28,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=154, Unknown=2, NotChecked=0, Total=210 [2021-10-15 20:08:28,648 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2021-10-15 20:08:28,649 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 26 transitions, 177 flow. Second operand has 15 states, 15 states have (on average 7.6) internal successors, (114), 15 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 20:08:28,649 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:08:28,649 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2021-10-15 20:08:28,649 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:08:41,163 INFO L129 PetriNetUnfolder]: 1/36 cut-off events. [2021-10-15 20:08:41,163 INFO L130 PetriNetUnfolder]: For 63/63 co-relation queries the response was YES. [2021-10-15 20:08:41,163 INFO L84 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 36 events. 1/36 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 4 event pairs, 0 based on Foata normal form. 1/37 useless extension candidates. Maximal degree in co-relation 157. Up to 8 conditions per place. [2021-10-15 20:08:41,164 INFO L132 encePairwiseOnDemand]: 24/31 looper letters, 22 selfloop transitions, 12 changer transitions 0/36 dead transitions. [2021-10-15 20:08:41,164 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 36 transitions, 329 flow [2021-10-15 20:08:41,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-15 20:08:41,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-15 20:08:41,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 113 transitions. [2021-10-15 20:08:41,166 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.2803970223325062 [2021-10-15 20:08:41,166 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 113 transitions. [2021-10-15 20:08:41,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 113 transitions. [2021-10-15 20:08:41,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:08:41,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 113 transitions. [2021-10-15 20:08:41,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 8.692307692307692) internal successors, (113), 13 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:41,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 31.0) internal successors, (434), 14 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:41,168 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 31.0) internal successors, (434), 14 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:41,168 INFO L186 Difference]: Start difference. First operand has 52 places, 26 transitions, 177 flow. Second operand 13 states and 113 transitions. [2021-10-15 20:08:41,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 36 transitions, 329 flow [2021-10-15 20:08:41,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 36 transitions, 246 flow, removed 9 selfloop flow, removed 11 redundant places. [2021-10-15 20:08:41,171 INFO L242 Difference]: Finished difference. Result has 51 places, 29 transitions, 186 flow [2021-10-15 20:08:41,172 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=186, PETRI_PLACES=51, PETRI_TRANSITIONS=29} [2021-10-15 20:08:41,172 INFO L334 CegarLoopForPetriNet]: 19 programPoint places, 32 predicate places. [2021-10-15 20:08:41,172 INFO L470 AbstractCegarLoop]: Abstraction has has 51 places, 29 transitions, 186 flow [2021-10-15 20:08:41,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.6) internal successors, (114), 15 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 20:08:41,173 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:08:41,173 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:08:41,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-15 20:08:41,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-15 20:08:41,374 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:08:41,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:08:41,374 INFO L82 PathProgramCache]: Analyzing trace with hash 920192473, now seen corresponding path program 4 times [2021-10-15 20:08:41,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:08:41,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441415883] [2021-10-15 20:08:41,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:41,374 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:08:41,384 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:08:41,384 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1863350165] [2021-10-15 20:08:41,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 20:08:41,385 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:08:41,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:08:41,386 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:08:41,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-15 20:08:41,627 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 20:08:41,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:08:41,629 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-15 20:08:41,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:09:09,072 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:09:09,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:09:09,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441415883] [2021-10-15 20:09:09,073 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:09:09,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863350165] [2021-10-15 20:09:09,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863350165] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:09:09,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:09:09,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-10-15 20:09:09,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875587711] [2021-10-15 20:09:09,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-15 20:09:09,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:09:09,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-15 20:09:09,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-10-15 20:09:09,077 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2021-10-15 20:09:09,077 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 29 transitions, 186 flow. Second operand has 16 states, 16 states have (on average 7.8125) internal successors, (125), 16 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:09:09,077 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:09:09,077 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2021-10-15 20:09:09,078 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:09:10,475 INFO L129 PetriNetUnfolder]: 1/41 cut-off events. [2021-10-15 20:09:10,475 INFO L130 PetriNetUnfolder]: For 84/84 co-relation queries the response was YES. [2021-10-15 20:09:10,476 INFO L84 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 41 events. 1/41 cut-off events. For 84/84 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 55. Up to 8 conditions per place. [2021-10-15 20:09:10,476 INFO L132 encePairwiseOnDemand]: 24/31 looper letters, 25 selfloop transitions, 14 changer transitions 0/41 dead transitions. [2021-10-15 20:09:10,476 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 41 transitions, 334 flow [2021-10-15 20:09:10,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-15 20:09:10,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-15 20:09:10,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 130 transitions. [2021-10-15 20:09:10,484 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.27956989247311825 [2021-10-15 20:09:10,484 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 130 transitions. [2021-10-15 20:09:10,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 130 transitions. [2021-10-15 20:09:10,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:09:10,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 130 transitions. [2021-10-15 20:09:10,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 8.666666666666666) internal successors, (130), 15 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 20:09:10,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 31.0) internal successors, (496), 16 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:09:10,488 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 31.0) internal successors, (496), 16 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:09:10,488 INFO L186 Difference]: Start difference. First operand has 51 places, 29 transitions, 186 flow. Second operand 15 states and 130 transitions. [2021-10-15 20:09:10,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 41 transitions, 334 flow [2021-10-15 20:09:10,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 41 transitions, 300 flow, removed 8 selfloop flow, removed 9 redundant places. [2021-10-15 20:09:10,491 INFO L242 Difference]: Finished difference. Result has 59 places, 32 transitions, 224 flow [2021-10-15 20:09:10,491 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=224, PETRI_PLACES=59, PETRI_TRANSITIONS=32} [2021-10-15 20:09:10,491 INFO L334 CegarLoopForPetriNet]: 19 programPoint places, 40 predicate places. [2021-10-15 20:09:10,492 INFO L470 AbstractCegarLoop]: Abstraction has has 59 places, 32 transitions, 224 flow [2021-10-15 20:09:10,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.8125) internal successors, (125), 16 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:09:10,492 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:09:10,492 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:09:10,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-10-15 20:09:10,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:09:10,719 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:09:10,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:09:10,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1070802690, now seen corresponding path program 5 times [2021-10-15 20:09:10,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:09:10,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160325289] [2021-10-15 20:09:10,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:09:10,720 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:09:10,741 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:09:10,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1072003466] [2021-10-15 20:09:10,742 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-15 20:09:10,743 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:09:10,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:09:10,745 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:09:10,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-15 20:09:11,047 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-15 20:09:11,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:09:11,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 51 conjunts are in the unsatisfiable core [2021-10-15 20:09:11,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:09:34,220 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:09:34,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:09:34,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160325289] [2021-10-15 20:09:34,221 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:09:34,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072003466] [2021-10-15 20:09:34,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072003466] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:09:34,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:09:34,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-10-15 20:09:34,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533374023] [2021-10-15 20:09:34,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-15 20:09:34,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:09:34,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-15 20:09:34,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-10-15 20:09:34,224 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2021-10-15 20:09:34,224 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 32 transitions, 224 flow. Second operand has 19 states, 19 states have (on average 7.7894736842105265) internal successors, (148), 19 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:09:34,224 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:09:34,225 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2021-10-15 20:09:34,225 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:09:37,473 INFO L129 PetriNetUnfolder]: 1/46 cut-off events. [2021-10-15 20:09:37,473 INFO L130 PetriNetUnfolder]: For 135/135 co-relation queries the response was YES. [2021-10-15 20:09:37,473 INFO L84 FinitePrefix]: Finished finitePrefix Result has 218 conditions, 46 events. 1/46 cut-off events. For 135/135 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 5 event pairs, 0 based on Foata normal form. 1/47 useless extension candidates. Maximal degree in co-relation 62. Up to 8 conditions per place. [2021-10-15 20:09:37,474 INFO L132 encePairwiseOnDemand]: 23/31 looper letters, 26 selfloop transitions, 18 changer transitions 0/46 dead transitions. [2021-10-15 20:09:37,474 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 46 transitions, 398 flow [2021-10-15 20:09:37,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-15 20:09:37,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-15 20:09:37,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 159 transitions. [2021-10-15 20:09:37,477 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.2699490662139219 [2021-10-15 20:09:37,477 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 159 transitions. [2021-10-15 20:09:37,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 159 transitions. [2021-10-15 20:09:37,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:09:37,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 159 transitions. [2021-10-15 20:09:37,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 8.368421052631579) internal successors, (159), 19 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:09:37,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 31.0) internal successors, (620), 20 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:09:37,480 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 31.0) internal successors, (620), 20 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:09:37,481 INFO L186 Difference]: Start difference. First operand has 59 places, 32 transitions, 224 flow. Second operand 19 states and 159 transitions. [2021-10-15 20:09:37,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 46 transitions, 398 flow [2021-10-15 20:09:37,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 46 transitions, 354 flow, removed 11 selfloop flow, removed 11 redundant places. [2021-10-15 20:09:37,484 INFO L242 Difference]: Finished difference. Result has 70 places, 36 transitions, 274 flow [2021-10-15 20:09:37,485 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=274, PETRI_PLACES=70, PETRI_TRANSITIONS=36} [2021-10-15 20:09:37,485 INFO L334 CegarLoopForPetriNet]: 19 programPoint places, 51 predicate places. [2021-10-15 20:09:37,485 INFO L470 AbstractCegarLoop]: Abstraction has has 70 places, 36 transitions, 274 flow [2021-10-15 20:09:37,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.7894736842105265) internal successors, (148), 19 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:09:37,486 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:09:37,486 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:09:37,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-15 20:09:37,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-15 20:09:37,703 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:09:37,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:09:37,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1492932473, now seen corresponding path program 6 times [2021-10-15 20:09:37,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:09:37,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703544645] [2021-10-15 20:09:37,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:09:37,704 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:09:37,714 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:09:37,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1625443209] [2021-10-15 20:09:37,715 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-15 20:09:37,715 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:09:37,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:09:37,721 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:09:37,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-15 20:09:38,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-10-15 20:09:38,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:09:38,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-15 20:09:38,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:09:39,267 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 79 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:09:39,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:09:39,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703544645] [2021-10-15 20:09:39,268 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:09:39,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625443209] [2021-10-15 20:09:39,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625443209] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:09:39,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:09:39,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-10-15 20:09:39,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114967746] [2021-10-15 20:09:39,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-15 20:09:39,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:09:39,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-15 20:09:39,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-10-15 20:09:39,271 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 31 [2021-10-15 20:09:39,271 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 36 transitions, 274 flow. Second operand has 19 states, 19 states have (on average 11.68421052631579) internal successors, (222), 19 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:09:39,271 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:09:39,272 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 31 [2021-10-15 20:09:39,272 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:09:40,084 INFO L129 PetriNetUnfolder]: 0/36 cut-off events. [2021-10-15 20:09:40,084 INFO L130 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2021-10-15 20:09:40,084 INFO L84 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 36 events. 0/36 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 0 event pairs, 0 based on Foata normal form. 1/37 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2021-10-15 20:09:40,084 INFO L132 encePairwiseOnDemand]: 23/31 looper letters, 0 selfloop transitions, 0 changer transitions 33/33 dead transitions. [2021-10-15 20:09:40,085 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 33 transitions, 257 flow [2021-10-15 20:09:40,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-15 20:09:40,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-10-15 20:09:40,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 200 transitions. [2021-10-15 20:09:40,086 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3795066413662239 [2021-10-15 20:09:40,086 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 200 transitions. [2021-10-15 20:09:40,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 200 transitions. [2021-10-15 20:09:40,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:09:40,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 200 transitions. [2021-10-15 20:09:40,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 11.764705882352942) internal successors, (200), 17 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:09:40,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 31.0) internal successors, (558), 18 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:09:40,089 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 31.0) internal successors, (558), 18 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:09:40,089 INFO L186 Difference]: Start difference. First operand has 70 places, 36 transitions, 274 flow. Second operand 17 states and 200 transitions. [2021-10-15 20:09:40,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 33 transitions, 257 flow [2021-10-15 20:09:40,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 33 transitions, 171 flow, removed 4 selfloop flow, removed 32 redundant places. [2021-10-15 20:09:40,091 INFO L242 Difference]: Finished difference. Result has 51 places, 0 transitions, 0 flow [2021-10-15 20:09:40,091 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=0, PETRI_PLACES=51, PETRI_TRANSITIONS=0} [2021-10-15 20:09:40,092 INFO L334 CegarLoopForPetriNet]: 19 programPoint places, 32 predicate places. [2021-10-15 20:09:40,092 INFO L470 AbstractCegarLoop]: Abstraction has has 51 places, 0 transitions, 0 flow [2021-10-15 20:09:40,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 11.68421052631579) internal successors, (222), 19 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:09:40,095 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:09:40,095 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:09:40,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-15 20:09:40,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:09:40,322 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 20:09:40,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:09:40 BoogieIcfgContainer [2021-10-15 20:09:40,326 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 20:09:40,327 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 20:09:40,327 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 20:09:40,327 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 20:09:40,327 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:06:55" (3/4) ... [2021-10-15 20:09:40,330 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 20:09:40,339 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-10-15 20:09:40,339 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 20:09:40,339 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:09:40,340 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:09:40,377 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 20:09:40,378 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 20:09:40,379 INFO L168 Benchmark]: Toolchain (without parser) took 165274.24 ms. Allocated memory was 81.8 MB in the beginning and 134.2 MB in the end (delta: 52.4 MB). Free memory was 45.2 MB in the beginning and 27.9 MB in the end (delta: 17.3 MB). Peak memory consumption was 68.6 MB. Max. memory is 16.1 GB. [2021-10-15 20:09:40,380 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 81.8 MB. Free memory is still 61.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:09:40,380 INFO L168 Benchmark]: CACSL2BoogieTranslator took 329.27 ms. Allocated memory was 81.8 MB in the beginning and 111.1 MB in the end (delta: 29.4 MB). Free memory was 44.9 MB in the beginning and 87.2 MB in the end (delta: -42.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 20:09:40,380 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.99 ms. Allocated memory is still 111.1 MB. Free memory was 87.2 MB in the beginning and 85.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:09:40,381 INFO L168 Benchmark]: Boogie Preprocessor took 23.74 ms. Allocated memory is still 111.1 MB. Free memory was 85.6 MB in the beginning and 84.5 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:09:40,381 INFO L168 Benchmark]: RCFGBuilder took 319.14 ms. Allocated memory is still 111.1 MB. Free memory was 84.5 MB in the beginning and 74.3 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 20:09:40,382 INFO L168 Benchmark]: TraceAbstraction took 164500.91 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 73.6 MB in the beginning and 30.7 MB in the end (delta: 42.8 MB). Peak memory consumption was 67.2 MB. Max. memory is 16.1 GB. [2021-10-15 20:09:40,387 INFO L168 Benchmark]: Witness Printer took 51.36 ms. Allocated memory is still 134.2 MB. Free memory was 30.7 MB in the beginning and 27.9 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:09:40,389 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 81.8 MB. Free memory is still 61.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 329.27 ms. Allocated memory was 81.8 MB in the beginning and 111.1 MB in the end (delta: 29.4 MB). Free memory was 44.9 MB in the beginning and 87.2 MB in the end (delta: -42.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.99 ms. Allocated memory is still 111.1 MB. Free memory was 87.2 MB in the beginning and 85.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.74 ms. Allocated memory is still 111.1 MB. Free memory was 85.6 MB in the beginning and 84.5 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 319.14 ms. Allocated memory is still 111.1 MB. Free memory was 84.5 MB in the beginning and 74.3 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 164500.91 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 73.6 MB in the beginning and 30.7 MB in the end (delta: 42.8 MB). Peak memory consumption was 67.2 MB. Max. memory is 16.1 GB. * Witness Printer took 51.36 ms. Allocated memory is still 134.2 MB. Free memory was 30.7 MB in the beginning and 27.9 MB in the end (delta: 2.8 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: 15]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 15]: 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, 23 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 6.2ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 164418.4ms, OverallIterations: 15, TraceHistogramMax: 7, EmptinessCheckTime: 0.0ms, AutomataDifference: 59748.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 42.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 94 SDtfs, 515 SDslu, 243 SDs, 0 SdLazy, 1846 SolverSat, 204 SolverUnsat, 8 SolverUnknown, 0 SolverNotchecked, 38164.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 437 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 32234.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=524occurred in iteration=9, InterpolantAutomatonStates: 167, 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: 79.8ms SsaConstructionTime, 392.9ms SatisfiabilityAnalysisTime, 98159.1ms InterpolantComputationTime, 346 NumberOfCodeBlocks, 333 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 331 ConstructedInterpolants, 11 QuantifiedInterpolants, 5285 SizeOfPredicates, 126 NumberOfNonLiveVariables, 1382 ConjunctsInSsa, 411 ConjunctsInUnsatCore, 15 InterpolantComputations, 3 PerfectInterpolantSequences, 114/291 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 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 20:09:40,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f948ea2-e007-4378-b92a-83ba1235c455/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...