./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound100.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_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/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_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/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_b04b3332-cd3e-4ae1-931e-819022185b74/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 d514d33a8e8d6b0824f7f820c453be18b3da50b0 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 19:06:14,460 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:06:14,462 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:06:14,510 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:06:14,511 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:06:14,515 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:06:14,517 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:06:14,521 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:06:14,524 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:06:14,530 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:06:14,532 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:06:14,534 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:06:14,535 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:06:14,537 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:06:14,540 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:06:14,544 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:06:14,546 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:06:14,547 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:06:14,549 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:06:14,557 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:06:14,558 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:06:14,560 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:06:14,563 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:06:14,564 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:06:14,573 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:06:14,573 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:06:14,574 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:06:14,576 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:06:14,576 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:06:14,578 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:06:14,578 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:06:14,579 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:06:14,581 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:06:14,582 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:06:14,584 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:06:14,584 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:06:14,585 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:06:14,585 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:06:14,586 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:06:14,586 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:06:14,587 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:06:14,589 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:06:14,629 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:06:14,630 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:06:14,630 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:06:14,631 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:06:14,639 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:06:14,639 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:06:14,639 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:06:14,639 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:06:14,640 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:06:14,640 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:06:14,641 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:06:14,641 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:06:14,641 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:06:14,642 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:06:14,642 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:06:14,642 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:06:14,642 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:06:14,642 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:06:14,643 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:06:14,643 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:06:14,643 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:06:14,643 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:06:14,644 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:06:14,644 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:06:14,644 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:06:14,644 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:06:14,644 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:06:14,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:06:14,645 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:06:14,645 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:06:14,645 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:06:14,646 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:06:14,646 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_b04b3332-cd3e-4ae1-931e-819022185b74/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d514d33a8e8d6b0824f7f820c453be18b3da50b0 [2021-10-15 19:06:14,918 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:06:14,954 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:06:14,956 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:06:14,958 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:06:14,960 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:06:14,961 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound100.c [2021-10-15 19:06:15,041 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/data/06d225998/e6b0f017ac3d4238949ddffa95e2266e/FLAGbe36a6af7 [2021-10-15 19:06:15,556 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:06:15,561 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound100.c [2021-10-15 19:06:15,571 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/data/06d225998/e6b0f017ac3d4238949ddffa95e2266e/FLAGbe36a6af7 [2021-10-15 19:06:15,901 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/data/06d225998/e6b0f017ac3d4238949ddffa95e2266e [2021-10-15 19:06:15,903 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:06:15,905 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:06:15,907 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:06:15,907 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:06:15,915 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:06:15,916 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:06:15" (1/1) ... [2021-10-15 19:06:15,918 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@314cc5b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:15, skipping insertion in model container [2021-10-15 19:06:15,918 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:06:15" (1/1) ... [2021-10-15 19:06:15,926 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:06:15,943 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:06:16,123 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_b04b3332-cd3e-4ae1-931e-819022185b74/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound100.c[490,503] [2021-10-15 19:06:16,144 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:06:16,152 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:06:16,161 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_b04b3332-cd3e-4ae1-931e-819022185b74/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound100.c[490,503] [2021-10-15 19:06:16,172 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:06:16,185 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:06:16,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:16 WrapperNode [2021-10-15 19:06:16,186 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:06:16,187 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:06:16,187 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:06:16,188 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:06:16,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:16" (1/1) ... [2021-10-15 19:06:16,202 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:16" (1/1) ... [2021-10-15 19:06:16,226 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:06:16,227 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:06:16,228 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:06:16,228 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:06:16,236 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:16" (1/1) ... [2021-10-15 19:06:16,236 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:16" (1/1) ... [2021-10-15 19:06:16,238 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:16" (1/1) ... [2021-10-15 19:06:16,239 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:16" (1/1) ... [2021-10-15 19:06:16,245 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:16" (1/1) ... [2021-10-15 19:06:16,250 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:16" (1/1) ... [2021-10-15 19:06:16,252 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:16" (1/1) ... [2021-10-15 19:06:16,254 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:06:16,255 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:06:16,255 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:06:16,256 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:06:16,257 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:16" (1/1) ... [2021-10-15 19:06:16,264 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:06:16,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:16,287 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:06:16,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:06:16,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:06:16,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:06:16,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:06:16,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:06:16,597 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:06:16,598 INFO L299 CfgBuilder]: Removed 30 assume(true) statements. [2021-10-15 19:06:16,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:06:16 BoogieIcfgContainer [2021-10-15 19:06:16,600 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:06:16,602 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:06:16,602 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:06:16,605 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:06:16,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:06:15" (1/3) ... [2021-10-15 19:06:16,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b2bbd4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:06:16, skipping insertion in model container [2021-10-15 19:06:16,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:16" (2/3) ... [2021-10-15 19:06:16,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b2bbd4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:06:16, skipping insertion in model container [2021-10-15 19:06:16,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:06:16" (3/3) ... [2021-10-15 19:06:16,609 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound100.c [2021-10-15 19:06:16,614 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:06:16,615 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-10-15 19:06:16,697 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:06:16,719 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-15 19:06:16,720 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-10-15 19:06:16,732 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 45 places, 62 transitions, 124 flow [2021-10-15 19:06:16,778 INFO L129 PetriNetUnfolder]: 18/62 cut-off events. [2021-10-15 19:06:16,778 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:06:16,780 INFO L84 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 62 events. 18/62 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 83 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-10-15 19:06:16,781 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 62 transitions, 124 flow [2021-10-15 19:06:16,788 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 57 transitions, 114 flow [2021-10-15 19:06:16,796 INFO L129 PetriNetUnfolder]: 11/33 cut-off events. [2021-10-15 19:06:16,797 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:06:16,797 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:16,798 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:16,799 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:06:16,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:16,805 INFO L82 PathProgramCache]: Analyzing trace with hash 227231803, now seen corresponding path program 1 times [2021-10-15 19:06:16,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:16,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530636751] [2021-10-15 19:06:16,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:16,817 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:16,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:17,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:06:17,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:17,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530636751] [2021-10-15 19:06:17,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530636751] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:17,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:17,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:06:17,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518541651] [2021-10-15 19:06:17,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-15 19:06:17,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:17,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-15 19:06:17,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-15 19:06:17,069 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 62 [2021-10-15 19:06:17,073 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 57 transitions, 114 flow. Second operand has 2 states, 2 states have (on average 48.0) internal successors, (96), 2 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:17,074 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:17,074 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 62 [2021-10-15 19:06:17,076 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:17,114 INFO L129 PetriNetUnfolder]: 2/42 cut-off events. [2021-10-15 19:06:17,115 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:06:17,117 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 42 events. 2/42 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 48 event pairs, 0 based on Foata normal form. 13/48 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2021-10-15 19:06:17,119 INFO L132 encePairwiseOnDemand]: 47/62 looper letters, 0 selfloop transitions, 0 changer transitions 0/42 dead transitions. [2021-10-15 19:06:17,120 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 42 transitions, 84 flow [2021-10-15 19:06:17,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-15 19:06:17,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-10-15 19:06:17,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 107 transitions. [2021-10-15 19:06:17,135 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8629032258064516 [2021-10-15 19:06:17,136 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 107 transitions. [2021-10-15 19:06:17,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 107 transitions. [2021-10-15 19:06:17,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:17,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 107 transitions. [2021-10-15 19:06:17,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 53.5) internal successors, (107), 2 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:17,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 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 19:06:17,153 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 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 19:06:17,155 INFO L186 Difference]: Start difference. First operand has 41 places, 57 transitions, 114 flow. Second operand 2 states and 107 transitions. [2021-10-15 19:06:17,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 42 transitions, 84 flow [2021-10-15 19:06:17,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 42 transitions, 84 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:06:17,164 INFO L242 Difference]: Finished difference. Result has 42 places, 42 transitions, 84 flow [2021-10-15 19:06:17,166 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=84, PETRI_PLACES=42, PETRI_TRANSITIONS=42} [2021-10-15 19:06:17,167 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 1 predicate places. [2021-10-15 19:06:17,168 INFO L470 AbstractCegarLoop]: Abstraction has has 42 places, 42 transitions, 84 flow [2021-10-15 19:06:17,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 48.0) internal successors, (96), 2 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:17,169 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:17,169 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:17,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:06:17,171 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:06:17,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:17,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1122121916, now seen corresponding path program 1 times [2021-10-15 19:06:17,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:17,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99330121] [2021-10-15 19:06:17,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:17,174 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:17,218 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:06:17,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [507522709] [2021-10-15 19:06:17,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:17,220 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:17,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:17,226 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:06:17,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:06:17,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:17,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 19:06:17,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:06:17,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:06:17,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:17,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99330121] [2021-10-15 19:06:17,554 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:06:17,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507522709] [2021-10-15 19:06:17,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507522709] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:17,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:17,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 19:06:17,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339693475] [2021-10-15 19:06:17,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:06:17,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:17,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:06:17,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:06:17,567 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 62 [2021-10-15 19:06:17,568 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 42 transitions, 84 flow. Second operand has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:17,568 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:17,568 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 62 [2021-10-15 19:06:17,568 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:17,700 INFO L129 PetriNetUnfolder]: 3/63 cut-off events. [2021-10-15 19:06:17,703 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:06:17,703 INFO L84 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 63 events. 3/63 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 71 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 94. Up to 12 conditions per place. [2021-10-15 19:06:17,704 INFO L132 encePairwiseOnDemand]: 57/62 looper letters, 27 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2021-10-15 19:06:17,704 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 50 transitions, 162 flow [2021-10-15 19:06:17,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:06:17,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:06:17,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2021-10-15 19:06:17,713 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.45698924731182794 [2021-10-15 19:06:17,714 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 170 transitions. [2021-10-15 19:06:17,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 170 transitions. [2021-10-15 19:06:17,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:17,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 170 transitions. [2021-10-15 19:06:17,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 28.333333333333332) internal successors, (170), 6 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:17,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 62.0) internal successors, (434), 7 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 19:06:17,725 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 62.0) internal successors, (434), 7 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 19:06:17,725 INFO L186 Difference]: Start difference. First operand has 42 places, 42 transitions, 84 flow. Second operand 6 states and 170 transitions. [2021-10-15 19:06:17,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 50 transitions, 162 flow [2021-10-15 19:06:17,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 50 transitions, 162 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:06:17,728 INFO L242 Difference]: Finished difference. Result has 48 places, 43 transitions, 100 flow [2021-10-15 19:06:17,728 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=100, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2021-10-15 19:06:17,731 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 7 predicate places. [2021-10-15 19:06:17,731 INFO L470 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 100 flow [2021-10-15 19:06:17,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:17,732 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:17,732 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:17,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:06:17,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:17,933 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:06:17,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:17,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1122125890, now seen corresponding path program 1 times [2021-10-15 19:06:17,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:17,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998541853] [2021-10-15 19:06:17,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:17,935 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:17,951 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:06:17,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [576026795] [2021-10-15 19:06:17,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:17,952 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:17,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:17,953 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:06:17,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:06:18,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:18,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-15 19:06:18,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:06:18,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:06:18,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:18,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998541853] [2021-10-15 19:06:18,253 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:06:18,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576026795] [2021-10-15 19:06:18,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576026795] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:18,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:18,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-15 19:06:18,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028199548] [2021-10-15 19:06:18,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:06:18,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:18,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:06:18,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:06:18,265 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 62 [2021-10-15 19:06:18,265 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 100 flow. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:18,265 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:18,266 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 62 [2021-10-15 19:06:18,266 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:18,479 INFO L129 PetriNetUnfolder]: 4/80 cut-off events. [2021-10-15 19:06:18,479 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-10-15 19:06:18,482 INFO L84 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 80 events. 4/80 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 152 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 153. Up to 25 conditions per place. [2021-10-15 19:06:18,483 INFO L132 encePairwiseOnDemand]: 51/62 looper letters, 53 selfloop transitions, 11 changer transitions 0/72 dead transitions. [2021-10-15 19:06:18,483 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 72 transitions, 289 flow [2021-10-15 19:06:18,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 19:06:18,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-15 19:06:18,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2021-10-15 19:06:18,487 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.2923387096774194 [2021-10-15 19:06:18,487 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 145 transitions. [2021-10-15 19:06:18,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 145 transitions. [2021-10-15 19:06:18,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:18,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 145 transitions. [2021-10-15 19:06:18,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:18,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 62.0) internal successors, (558), 9 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 19:06:18,495 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 62.0) internal successors, (558), 9 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 19:06:18,495 INFO L186 Difference]: Start difference. First operand has 48 places, 43 transitions, 100 flow. Second operand 8 states and 145 transitions. [2021-10-15 19:06:18,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 72 transitions, 289 flow [2021-10-15 19:06:18,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 72 transitions, 284 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-10-15 19:06:18,502 INFO L242 Difference]: Finished difference. Result has 55 places, 48 transitions, 152 flow [2021-10-15 19:06:18,503 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=152, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2021-10-15 19:06:18,503 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 14 predicate places. [2021-10-15 19:06:18,503 INFO L470 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 152 flow [2021-10-15 19:06:18,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:18,504 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:18,504 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:18,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:06:18,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:18,707 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:06:18,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:18,707 INFO L82 PathProgramCache]: Analyzing trace with hash 326346277, now seen corresponding path program 1 times [2021-10-15 19:06:18,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:18,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787127361] [2021-10-15 19:06:18,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:18,708 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:18,738 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:06:18,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1195769373] [2021-10-15 19:06:18,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:18,739 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:18,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:18,741 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:06:18,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 19:06:18,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:18,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-15 19:06:18,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:06:19,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:06:19,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:19,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787127361] [2021-10-15 19:06:19,334 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:06:19,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195769373] [2021-10-15 19:06:19,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195769373] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:19,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:19,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-15 19:06:19,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208769488] [2021-10-15 19:06:19,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 19:06:19,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:19,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 19:06:19,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-15 19:06:19,338 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 62 [2021-10-15 19:06:19,338 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 152 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:19,339 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:19,339 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 62 [2021-10-15 19:06:19,339 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:19,569 INFO L129 PetriNetUnfolder]: 4/76 cut-off events. [2021-10-15 19:06:19,570 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2021-10-15 19:06:19,574 INFO L84 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 76 events. 4/76 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 140 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 171. Up to 26 conditions per place. [2021-10-15 19:06:19,576 INFO L132 encePairwiseOnDemand]: 51/62 looper letters, 41 selfloop transitions, 12 changer transitions 0/61 dead transitions. [2021-10-15 19:06:19,576 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 61 transitions, 292 flow [2021-10-15 19:06:19,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-15 19:06:19,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-15 19:06:19,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 150 transitions. [2021-10-15 19:06:19,578 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.24193548387096775 [2021-10-15 19:06:19,578 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 150 transitions. [2021-10-15 19:06:19,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 150 transitions. [2021-10-15 19:06:19,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:19,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 150 transitions. [2021-10-15 19:06:19,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 15.0) internal successors, (150), 10 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:19,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 62.0) internal successors, (682), 11 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:19,586 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 62.0) internal successors, (682), 11 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:19,586 INFO L186 Difference]: Start difference. First operand has 55 places, 48 transitions, 152 flow. Second operand 10 states and 150 transitions. [2021-10-15 19:06:19,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 61 transitions, 292 flow [2021-10-15 19:06:19,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 61 transitions, 287 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-10-15 19:06:19,592 INFO L242 Difference]: Finished difference. Result has 63 places, 50 transitions, 192 flow [2021-10-15 19:06:19,592 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=192, PETRI_PLACES=63, PETRI_TRANSITIONS=50} [2021-10-15 19:06:19,593 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 22 predicate places. [2021-10-15 19:06:19,593 INFO L470 AbstractCegarLoop]: Abstraction has has 63 places, 50 transitions, 192 flow [2021-10-15 19:06:19,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:19,601 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:19,601 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:19,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 19:06:19,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:19,821 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:06:19,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:19,822 INFO L82 PathProgramCache]: Analyzing trace with hash 86317224, now seen corresponding path program 1 times [2021-10-15 19:06:19,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:19,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487962555] [2021-10-15 19:06:19,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:19,823 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:19,844 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:06:19,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1205936228] [2021-10-15 19:06:19,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:19,848 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:19,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:19,850 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:06:19,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 19:06:19,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:19,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-15 19:06:19,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:06:20,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:06:20,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:20,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487962555] [2021-10-15 19:06:20,321 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:06:20,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205936228] [2021-10-15 19:06:20,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205936228] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:20,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:20,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-15 19:06:20,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717234906] [2021-10-15 19:06:20,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:06:20,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:20,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:06:20,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:06:20,324 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 62 [2021-10-15 19:06:20,325 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 50 transitions, 192 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:20,325 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:20,325 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 62 [2021-10-15 19:06:20,325 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:20,504 INFO L129 PetriNetUnfolder]: 4/72 cut-off events. [2021-10-15 19:06:20,504 INFO L130 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2021-10-15 19:06:20,504 INFO L84 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 72 events. 4/72 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 120 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 185. Up to 26 conditions per place. [2021-10-15 19:06:20,505 INFO L132 encePairwiseOnDemand]: 51/62 looper letters, 41 selfloop transitions, 11 changer transitions 0/60 dead transitions. [2021-10-15 19:06:20,505 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 60 transitions, 322 flow [2021-10-15 19:06:20,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-15 19:06:20,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-15 19:06:20,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2021-10-15 19:06:20,507 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.2564516129032258 [2021-10-15 19:06:20,507 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 159 transitions. [2021-10-15 19:06:20,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 159 transitions. [2021-10-15 19:06:20,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:20,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 159 transitions. [2021-10-15 19:06:20,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 15.9) internal successors, (159), 10 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 19:06:20,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 62.0) internal successors, (682), 11 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:20,510 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 62.0) internal successors, (682), 11 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:20,510 INFO L186 Difference]: Start difference. First operand has 63 places, 50 transitions, 192 flow. Second operand 10 states and 159 transitions. [2021-10-15 19:06:20,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 60 transitions, 322 flow [2021-10-15 19:06:20,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 60 transitions, 306 flow, removed 0 selfloop flow, removed 7 redundant places. [2021-10-15 19:06:20,514 INFO L242 Difference]: Finished difference. Result has 66 places, 51 transitions, 206 flow [2021-10-15 19:06:20,515 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=206, PETRI_PLACES=66, PETRI_TRANSITIONS=51} [2021-10-15 19:06:20,515 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 25 predicate places. [2021-10-15 19:06:20,515 INFO L470 AbstractCegarLoop]: Abstraction has has 66 places, 51 transitions, 206 flow [2021-10-15 19:06:20,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:20,515 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:20,515 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:20,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 19:06:20,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:20,729 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:06:20,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:20,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1346631627, now seen corresponding path program 1 times [2021-10-15 19:06:20,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:20,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306427607] [2021-10-15 19:06:20,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:20,730 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:20,744 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:06:20,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [168521915] [2021-10-15 19:06:20,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:20,745 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:20,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:20,746 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:06:20,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 19:06:20,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:20,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-15 19:06:20,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:06:21,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:06:21,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:21,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306427607] [2021-10-15 19:06:21,235 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:06:21,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168521915] [2021-10-15 19:06:21,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168521915] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:21,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:21,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 19:06:21,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511101153] [2021-10-15 19:06:21,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:06:21,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:21,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:06:21,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:06:21,237 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2021-10-15 19:06:21,238 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 51 transitions, 206 flow. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:21,238 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:21,238 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2021-10-15 19:06:21,238 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:21,341 INFO L129 PetriNetUnfolder]: 5/73 cut-off events. [2021-10-15 19:06:21,341 INFO L130 PetriNetUnfolder]: For 64/64 co-relation queries the response was YES. [2021-10-15 19:06:21,342 INFO L84 FinitePrefix]: Finished finitePrefix Result has 205 conditions, 73 events. 5/73 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 107 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 194. Up to 28 conditions per place. [2021-10-15 19:06:21,343 INFO L132 encePairwiseOnDemand]: 54/62 looper letters, 37 selfloop transitions, 11 changer transitions 0/63 dead transitions. [2021-10-15 19:06:21,343 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 63 transitions, 341 flow [2021-10-15 19:06:21,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:06:21,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:06:21,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2021-10-15 19:06:21,345 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.41397849462365593 [2021-10-15 19:06:21,345 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 154 transitions. [2021-10-15 19:06:21,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 154 transitions. [2021-10-15 19:06:21,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:21,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 154 transitions. [2021-10-15 19:06:21,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 25.666666666666668) internal successors, (154), 6 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:21,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 62.0) internal successors, (434), 7 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 19:06:21,349 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 62.0) internal successors, (434), 7 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 19:06:21,349 INFO L186 Difference]: Start difference. First operand has 66 places, 51 transitions, 206 flow. Second operand 6 states and 154 transitions. [2021-10-15 19:06:21,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 63 transitions, 341 flow [2021-10-15 19:06:21,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 63 transitions, 326 flow, removed 0 selfloop flow, removed 7 redundant places. [2021-10-15 19:06:21,361 INFO L242 Difference]: Finished difference. Result has 67 places, 56 transitions, 254 flow [2021-10-15 19:06:21,361 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=254, PETRI_PLACES=67, PETRI_TRANSITIONS=56} [2021-10-15 19:06:21,361 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 26 predicate places. [2021-10-15 19:06:21,361 INFO L470 AbstractCegarLoop]: Abstraction has has 67 places, 56 transitions, 254 flow [2021-10-15 19:06:21,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:21,362 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:21,362 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:21,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-15 19:06:21,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-15 19:06:21,569 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:06:21,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:21,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1781730828, now seen corresponding path program 1 times [2021-10-15 19:06:21,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:21,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526049941] [2021-10-15 19:06:21,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:21,570 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:21,583 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:06:21,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [326156545] [2021-10-15 19:06:21,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:21,583 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:21,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:21,584 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:06:21,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-15 19:06:21,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:21,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-15 19:06:21,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:06:21,905 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 19:06:21,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:21,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526049941] [2021-10-15 19:06:21,906 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:06:21,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326156545] [2021-10-15 19:06:21,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326156545] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:06:21,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:06:21,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-15 19:06:21,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41965763] [2021-10-15 19:06:21,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:06:21,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:21,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:06:21,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:06:21,909 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 62 [2021-10-15 19:06:21,909 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 56 transitions, 254 flow. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:21,909 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:21,909 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 62 [2021-10-15 19:06:21,910 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:22,034 INFO L129 PetriNetUnfolder]: 8/118 cut-off events. [2021-10-15 19:06:22,034 INFO L130 PetriNetUnfolder]: For 105/105 co-relation queries the response was YES. [2021-10-15 19:06:22,035 INFO L84 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 118 events. 8/118 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 187 event pairs, 0 based on Foata normal form. 3/120 useless extension candidates. Maximal degree in co-relation 347. Up to 44 conditions per place. [2021-10-15 19:06:22,036 INFO L132 encePairwiseOnDemand]: 56/62 looper letters, 59 selfloop transitions, 18 changer transitions 0/95 dead transitions. [2021-10-15 19:06:22,036 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 95 transitions, 602 flow [2021-10-15 19:06:22,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:06:22,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:06:22,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2021-10-15 19:06:22,038 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.46774193548387094 [2021-10-15 19:06:22,038 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 174 transitions. [2021-10-15 19:06:22,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 174 transitions. [2021-10-15 19:06:22,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:22,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 174 transitions. [2021-10-15 19:06:22,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:22,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 62.0) internal successors, (434), 7 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 19:06:22,042 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 62.0) internal successors, (434), 7 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 19:06:22,042 INFO L186 Difference]: Start difference. First operand has 67 places, 56 transitions, 254 flow. Second operand 6 states and 174 transitions. [2021-10-15 19:06:22,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 95 transitions, 602 flow [2021-10-15 19:06:22,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 95 transitions, 600 flow, removed 1 selfloop flow, removed 0 redundant places. [2021-10-15 19:06:22,050 INFO L242 Difference]: Finished difference. Result has 75 places, 67 transitions, 398 flow [2021-10-15 19:06:22,050 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=398, PETRI_PLACES=75, PETRI_TRANSITIONS=67} [2021-10-15 19:06:22,050 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 34 predicate places. [2021-10-15 19:06:22,051 INFO L470 AbstractCegarLoop]: Abstraction has has 75 places, 67 transitions, 398 flow [2021-10-15 19:06:22,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:22,051 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:22,051 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:22,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-15 19:06:22,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:22,269 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:06:22,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:22,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1655367537, now seen corresponding path program 1 times [2021-10-15 19:06:22,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:22,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931007027] [2021-10-15 19:06:22,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:22,270 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:22,283 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:06:22,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1178581604] [2021-10-15 19:06:22,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:22,284 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:22,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:22,285 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:06:22,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-15 19:06:22,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:22,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-15 19:06:22,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:06:22,613 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 19:06:22,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:22,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931007027] [2021-10-15 19:06:22,613 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:06:22,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178581604] [2021-10-15 19:06:22,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178581604] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:06:22,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:06:22,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-15 19:06:22,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278316959] [2021-10-15 19:06:22,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:06:22,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:22,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:06:22,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:06:22,615 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 62 [2021-10-15 19:06:22,616 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 67 transitions, 398 flow. Second operand has 7 states, 7 states have (on average 25.0) internal successors, (175), 7 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:22,616 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:22,616 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 62 [2021-10-15 19:06:22,616 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:22,836 INFO L129 PetriNetUnfolder]: 14/238 cut-off events. [2021-10-15 19:06:22,836 INFO L130 PetriNetUnfolder]: For 364/364 co-relation queries the response was YES. [2021-10-15 19:06:22,838 INFO L84 FinitePrefix]: Finished finitePrefix Result has 674 conditions, 238 events. 14/238 cut-off events. For 364/364 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 687 event pairs, 0 based on Foata normal form. 2/238 useless extension candidates. Maximal degree in co-relation 656. Up to 35 conditions per place. [2021-10-15 19:06:22,841 INFO L132 encePairwiseOnDemand]: 53/62 looper letters, 73 selfloop transitions, 16 changer transitions 0/110 dead transitions. [2021-10-15 19:06:22,841 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 110 transitions, 843 flow [2021-10-15 19:06:22,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 19:06:22,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-15 19:06:22,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 254 transitions. [2021-10-15 19:06:22,844 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4551971326164875 [2021-10-15 19:06:22,844 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 254 transitions. [2021-10-15 19:06:22,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 254 transitions. [2021-10-15 19:06:22,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:22,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 254 transitions. [2021-10-15 19:06:22,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 28.22222222222222) internal successors, (254), 9 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:22,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 62.0) internal successors, (620), 10 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 19:06:22,847 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 62.0) internal successors, (620), 10 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 19:06:22,848 INFO L186 Difference]: Start difference. First operand has 75 places, 67 transitions, 398 flow. Second operand 9 states and 254 transitions. [2021-10-15 19:06:22,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 110 transitions, 843 flow [2021-10-15 19:06:22,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 110 transitions, 821 flow, removed 11 selfloop flow, removed 0 redundant places. [2021-10-15 19:06:22,857 INFO L242 Difference]: Finished difference. Result has 86 places, 75 transitions, 498 flow [2021-10-15 19:06:22,857 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=498, PETRI_PLACES=86, PETRI_TRANSITIONS=75} [2021-10-15 19:06:22,858 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 45 predicate places. [2021-10-15 19:06:22,858 INFO L470 AbstractCegarLoop]: Abstraction has has 86 places, 75 transitions, 498 flow [2021-10-15 19:06:22,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.0) internal successors, (175), 7 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:22,858 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:22,858 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:22,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-15 19:06:23,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:23,069 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:06:23,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:23,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1674279834, now seen corresponding path program 1 times [2021-10-15 19:06:23,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:23,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627795386] [2021-10-15 19:06:23,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:23,070 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:23,094 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:06:23,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [588504854] [2021-10-15 19:06:23,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:23,095 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:23,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:23,096 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:06:23,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-15 19:06:23,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:23,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-15 19:06:23,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:06:23,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:06:23,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:23,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627795386] [2021-10-15 19:06:23,609 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:06:23,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588504854] [2021-10-15 19:06:23,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588504854] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:06:23,610 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:06:23,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-15 19:06:23,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634908033] [2021-10-15 19:06:23,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:06:23,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:23,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:06:23,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:06:23,615 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2021-10-15 19:06:23,615 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 75 transitions, 498 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:23,615 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:23,615 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2021-10-15 19:06:23,615 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:23,785 INFO L129 PetriNetUnfolder]: 19/334 cut-off events. [2021-10-15 19:06:23,785 INFO L130 PetriNetUnfolder]: For 409/409 co-relation queries the response was YES. [2021-10-15 19:06:23,789 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1081 conditions, 334 events. 19/334 cut-off events. For 409/409 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1290 event pairs, 0 based on Foata normal form. 7/338 useless extension candidates. Maximal degree in co-relation 1059. Up to 153 conditions per place. [2021-10-15 19:06:23,791 INFO L132 encePairwiseOnDemand]: 54/62 looper letters, 78 selfloop transitions, 15 changer transitions 2/111 dead transitions. [2021-10-15 19:06:23,791 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 111 transitions, 897 flow [2021-10-15 19:06:23,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:06:23,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:06:23,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2021-10-15 19:06:23,793 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4543010752688172 [2021-10-15 19:06:23,793 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 169 transitions. [2021-10-15 19:06:23,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 169 transitions. [2021-10-15 19:06:23,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:23,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 169 transitions. [2021-10-15 19:06:23,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 28.166666666666668) internal successors, (169), 6 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:23,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 62.0) internal successors, (434), 7 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 19:06:23,797 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 62.0) internal successors, (434), 7 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 19:06:23,797 INFO L186 Difference]: Start difference. First operand has 86 places, 75 transitions, 498 flow. Second operand 6 states and 169 transitions. [2021-10-15 19:06:23,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 111 transitions, 897 flow [2021-10-15 19:06:23,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 111 transitions, 884 flow, removed 4 selfloop flow, removed 3 redundant places. [2021-10-15 19:06:23,811 INFO L242 Difference]: Finished difference. Result has 90 places, 84 transitions, 626 flow [2021-10-15 19:06:23,811 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=626, PETRI_PLACES=90, PETRI_TRANSITIONS=84} [2021-10-15 19:06:23,812 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 49 predicate places. [2021-10-15 19:06:23,812 INFO L470 AbstractCegarLoop]: Abstraction has has 90 places, 84 transitions, 626 flow [2021-10-15 19:06:23,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:23,812 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:23,812 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:23,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-15 19:06:24,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:24,030 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:06:24,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:24,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1629657891, now seen corresponding path program 1 times [2021-10-15 19:06:24,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:24,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276729129] [2021-10-15 19:06:24,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:24,031 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:24,047 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:06:24,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [828048436] [2021-10-15 19:06:24,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:24,057 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:24,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:24,058 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:06:24,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-15 19:06:24,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:24,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-15 19:06:24,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:06:24,996 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:06:24,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:24,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276729129] [2021-10-15 19:06:24,997 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:06:24,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828048436] [2021-10-15 19:06:24,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828048436] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:06:24,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:06:24,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-15 19:06:24,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121537578] [2021-10-15 19:06:24,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-15 19:06:24,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:24,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-15 19:06:24,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-10-15 19:06:24,999 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 62 [2021-10-15 19:06:24,999 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 84 transitions, 626 flow. Second operand has 10 states, 10 states have (on average 13.0) internal successors, (130), 10 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:25,000 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:25,000 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 62 [2021-10-15 19:06:25,000 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:25,322 INFO L129 PetriNetUnfolder]: 19/327 cut-off events. [2021-10-15 19:06:25,323 INFO L130 PetriNetUnfolder]: For 592/592 co-relation queries the response was YES. [2021-10-15 19:06:25,324 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1154 conditions, 327 events. 19/327 cut-off events. For 592/592 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1228 event pairs, 0 based on Foata normal form. 3/327 useless extension candidates. Maximal degree in co-relation 1130. Up to 195 conditions per place. [2021-10-15 19:06:25,326 INFO L132 encePairwiseOnDemand]: 49/62 looper letters, 89 selfloop transitions, 20 changer transitions 0/117 dead transitions. [2021-10-15 19:06:25,326 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 117 transitions, 1050 flow [2021-10-15 19:06:25,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-15 19:06:25,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-15 19:06:25,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 193 transitions. [2021-10-15 19:06:25,328 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.2594086021505376 [2021-10-15 19:06:25,328 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 193 transitions. [2021-10-15 19:06:25,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 193 transitions. [2021-10-15 19:06:25,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:25,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 193 transitions. [2021-10-15 19:06:25,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 16.083333333333332) internal successors, (193), 12 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:25,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 62.0) internal successors, (806), 13 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:25,331 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 62.0) internal successors, (806), 13 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:25,331 INFO L186 Difference]: Start difference. First operand has 90 places, 84 transitions, 626 flow. Second operand 12 states and 193 transitions. [2021-10-15 19:06:25,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 117 transitions, 1050 flow [2021-10-15 19:06:25,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 117 transitions, 1013 flow, removed 9 selfloop flow, removed 3 redundant places. [2021-10-15 19:06:25,342 INFO L242 Difference]: Finished difference. Result has 101 places, 89 transitions, 694 flow [2021-10-15 19:06:25,342 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=694, PETRI_PLACES=101, PETRI_TRANSITIONS=89} [2021-10-15 19:06:25,343 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 60 predicate places. [2021-10-15 19:06:25,343 INFO L470 AbstractCegarLoop]: Abstraction has has 101 places, 89 transitions, 694 flow [2021-10-15 19:06:25,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.0) internal successors, (130), 10 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:25,343 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:25,343 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:25,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-15 19:06:25,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-15 19:06:25,569 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:06:25,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:25,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1561987776, now seen corresponding path program 1 times [2021-10-15 19:06:25,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:25,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801696720] [2021-10-15 19:06:25,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:25,570 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:25,583 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:06:25,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2098002144] [2021-10-15 19:06:25,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:25,583 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:25,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:25,584 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:06:25,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-15 19:06:25,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:25,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 48 conjunts are in the unsatisfiable core [2021-10-15 19:06:25,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:06:26,579 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:06:26,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:26,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801696720] [2021-10-15 19:06:26,579 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:06:26,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098002144] [2021-10-15 19:06:26,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098002144] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:06:26,580 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:06:26,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-15 19:06:26,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936661143] [2021-10-15 19:06:26,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-15 19:06:26,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:26,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-15 19:06:26,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-10-15 19:06:26,581 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 62 [2021-10-15 19:06:26,582 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 89 transitions, 694 flow. Second operand has 10 states, 10 states have (on average 19.5) internal successors, (195), 10 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:26,582 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:26,582 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 62 [2021-10-15 19:06:26,582 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:26,848 INFO L129 PetriNetUnfolder]: 20/329 cut-off events. [2021-10-15 19:06:26,848 INFO L130 PetriNetUnfolder]: For 689/689 co-relation queries the response was YES. [2021-10-15 19:06:26,850 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1208 conditions, 329 events. 20/329 cut-off events. For 689/689 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1256 event pairs, 0 based on Foata normal form. 3/329 useless extension candidates. Maximal degree in co-relation 1181. Up to 198 conditions per place. [2021-10-15 19:06:26,852 INFO L132 encePairwiseOnDemand]: 51/62 looper letters, 82 selfloop transitions, 24 changer transitions 0/121 dead transitions. [2021-10-15 19:06:26,852 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 121 transitions, 1106 flow [2021-10-15 19:06:26,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-15 19:06:26,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-15 19:06:26,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 240 transitions. [2021-10-15 19:06:26,854 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2021-10-15 19:06:26,854 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 240 transitions. [2021-10-15 19:06:26,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 240 transitions. [2021-10-15 19:06:26,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:26,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 240 transitions. [2021-10-15 19:06:26,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 24.0) internal successors, (240), 10 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:26,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 62.0) internal successors, (682), 11 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:26,857 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 62.0) internal successors, (682), 11 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:26,857 INFO L186 Difference]: Start difference. First operand has 101 places, 89 transitions, 694 flow. Second operand 10 states and 240 transitions. [2021-10-15 19:06:26,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 121 transitions, 1106 flow [2021-10-15 19:06:26,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 121 transitions, 1070 flow, removed 2 selfloop flow, removed 7 redundant places. [2021-10-15 19:06:26,868 INFO L242 Difference]: Finished difference. Result has 107 places, 100 transitions, 839 flow [2021-10-15 19:06:26,869 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=839, PETRI_PLACES=107, PETRI_TRANSITIONS=100} [2021-10-15 19:06:26,869 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 66 predicate places. [2021-10-15 19:06:26,869 INFO L470 AbstractCegarLoop]: Abstraction has has 107 places, 100 transitions, 839 flow [2021-10-15 19:06:26,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.5) internal successors, (195), 10 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:26,869 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:26,869 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:26,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-15 19:06:27,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:27,088 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:06:27,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:27,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1088491650, now seen corresponding path program 2 times [2021-10-15 19:06:27,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:27,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712730755] [2021-10-15 19:06:27,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:27,089 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:27,108 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:06:27,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [42134910] [2021-10-15 19:06:27,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:06:27,108 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:27,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:27,109 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:06:27,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-15 19:06:27,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:06:27,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:06:27,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-15 19:06:27,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:06:27,900 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:06:27,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:27,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712730755] [2021-10-15 19:06:27,900 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:06:27,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42134910] [2021-10-15 19:06:27,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42134910] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:06:27,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:06:27,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-15 19:06:27,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632888201] [2021-10-15 19:06:27,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-15 19:06:27,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:27,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-15 19:06:27,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-10-15 19:06:27,903 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 62 [2021-10-15 19:06:27,903 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 100 transitions, 839 flow. Second operand has 12 states, 12 states have (on average 19.166666666666668) internal successors, (230), 12 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:27,903 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:27,903 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 62 [2021-10-15 19:06:27,903 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:28,700 INFO L129 PetriNetUnfolder]: 27/422 cut-off events. [2021-10-15 19:06:28,700 INFO L130 PetriNetUnfolder]: For 1021/1021 co-relation queries the response was YES. [2021-10-15 19:06:28,703 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1658 conditions, 422 events. 27/422 cut-off events. For 1021/1021 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1740 event pairs, 0 based on Foata normal form. 6/425 useless extension candidates. Maximal degree in co-relation 1627. Up to 113 conditions per place. [2021-10-15 19:06:28,705 INFO L132 encePairwiseOnDemand]: 48/62 looper letters, 94 selfloop transitions, 80 changer transitions 0/189 dead transitions. [2021-10-15 19:06:28,706 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 189 transitions, 1790 flow [2021-10-15 19:06:28,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-15 19:06:28,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-15 19:06:28,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 529 transitions. [2021-10-15 19:06:28,709 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.35551075268817206 [2021-10-15 19:06:28,709 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 529 transitions. [2021-10-15 19:06:28,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 529 transitions. [2021-10-15 19:06:28,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:28,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 529 transitions. [2021-10-15 19:06:28,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 22.041666666666668) internal successors, (529), 24 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:28,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 62.0) internal successors, (1550), 25 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:28,716 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 62.0) internal successors, (1550), 25 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:28,717 INFO L186 Difference]: Start difference. First operand has 107 places, 100 transitions, 839 flow. Second operand 24 states and 529 transitions. [2021-10-15 19:06:28,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 189 transitions, 1790 flow [2021-10-15 19:06:28,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 189 transitions, 1728 flow, removed 19 selfloop flow, removed 3 redundant places. [2021-10-15 19:06:28,739 INFO L242 Difference]: Finished difference. Result has 137 places, 141 transitions, 1446 flow [2021-10-15 19:06:28,739 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1446, PETRI_PLACES=137, PETRI_TRANSITIONS=141} [2021-10-15 19:06:28,739 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 96 predicate places. [2021-10-15 19:06:28,739 INFO L470 AbstractCegarLoop]: Abstraction has has 137 places, 141 transitions, 1446 flow [2021-10-15 19:06:28,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 19.166666666666668) internal successors, (230), 12 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:28,740 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:28,740 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:28,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-15 19:06:28,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-15 19:06:28,940 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:06:28,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:28,941 INFO L82 PathProgramCache]: Analyzing trace with hash -50686429, now seen corresponding path program 1 times [2021-10-15 19:06:28,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:28,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619905077] [2021-10-15 19:06:28,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:28,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:28,953 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:06:28,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1775538086] [2021-10-15 19:06:28,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:28,954 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:28,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:28,955 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:06:28,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-15 19:06:29,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:29,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-15 19:06:29,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:06:30,455 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:06:30,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:30,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619905077] [2021-10-15 19:06:30,456 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:06:30,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775538086] [2021-10-15 19:06:30,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775538086] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:06:30,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:06:30,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-15 19:06:30,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644368727] [2021-10-15 19:06:30,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-15 19:06:30,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:30,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-15 19:06:30,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-15 19:06:30,459 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 62 [2021-10-15 19:06:30,459 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 141 transitions, 1446 flow. Second operand has 11 states, 11 states have (on average 13.181818181818182) internal successors, (145), 11 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:30,459 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:30,459 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 62 [2021-10-15 19:06:30,459 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:31,210 INFO L129 PetriNetUnfolder]: 31/481 cut-off events. [2021-10-15 19:06:31,210 INFO L130 PetriNetUnfolder]: For 1777/1777 co-relation queries the response was YES. [2021-10-15 19:06:31,213 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2325 conditions, 481 events. 31/481 cut-off events. For 1777/1777 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2198 event pairs, 0 based on Foata normal form. 4/482 useless extension candidates. Maximal degree in co-relation 2284. Up to 310 conditions per place. [2021-10-15 19:06:31,216 INFO L132 encePairwiseOnDemand]: 46/62 looper letters, 148 selfloop transitions, 28 changer transitions 3/187 dead transitions. [2021-10-15 19:06:31,216 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 187 transitions, 2226 flow [2021-10-15 19:06:31,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-15 19:06:31,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-15 19:06:31,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 248 transitions. [2021-10-15 19:06:31,219 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.25 [2021-10-15 19:06:31,219 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 248 transitions. [2021-10-15 19:06:31,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 248 transitions. [2021-10-15 19:06:31,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:31,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 248 transitions. [2021-10-15 19:06:31,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 15.5) internal successors, (248), 16 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:31,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 62.0) internal successors, (1054), 17 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:31,223 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 62.0) internal successors, (1054), 17 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:31,223 INFO L186 Difference]: Start difference. First operand has 137 places, 141 transitions, 1446 flow. Second operand 16 states and 248 transitions. [2021-10-15 19:06:31,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 187 transitions, 2226 flow [2021-10-15 19:06:31,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 187 transitions, 2060 flow, removed 69 selfloop flow, removed 3 redundant places. [2021-10-15 19:06:31,252 INFO L242 Difference]: Finished difference. Result has 154 places, 150 transitions, 1508 flow [2021-10-15 19:06:31,252 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=1323, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1508, PETRI_PLACES=154, PETRI_TRANSITIONS=150} [2021-10-15 19:06:31,253 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 113 predicate places. [2021-10-15 19:06:31,253 INFO L470 AbstractCegarLoop]: Abstraction has has 154 places, 150 transitions, 1508 flow [2021-10-15 19:06:31,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.181818181818182) internal successors, (145), 11 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:31,253 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:31,253 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:31,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-15 19:06:31,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:31,469 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:06:31,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:31,469 INFO L82 PathProgramCache]: Analyzing trace with hash -269629041, now seen corresponding path program 2 times [2021-10-15 19:06:31,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:31,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356350586] [2021-10-15 19:06:31,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:31,470 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:31,498 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:06:31,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1486655631] [2021-10-15 19:06:31,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:06:31,499 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:31,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:31,505 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:06:31,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-15 19:06:31,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:06:31,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:06:31,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-15 19:06:31,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:06:32,029 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:06:32,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:32,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356350586] [2021-10-15 19:06:32,029 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:06:32,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486655631] [2021-10-15 19:06:32,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486655631] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:32,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:32,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 19:06:32,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062276954] [2021-10-15 19:06:32,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:06:32,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:32,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:06:32,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:06:32,032 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 62 [2021-10-15 19:06:32,032 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 150 transitions, 1508 flow. Second operand has 5 states, 5 states have (on average 36.8) internal successors, (184), 5 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:32,032 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:32,032 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 62 [2021-10-15 19:06:32,032 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:32,170 INFO L129 PetriNetUnfolder]: 20/384 cut-off events. [2021-10-15 19:06:32,170 INFO L130 PetriNetUnfolder]: For 1852/1852 co-relation queries the response was YES. [2021-10-15 19:06:32,172 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1726 conditions, 384 events. 20/384 cut-off events. For 1852/1852 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1384 event pairs, 0 based on Foata normal form. 5/389 useless extension candidates. Maximal degree in co-relation 1680. Up to 104 conditions per place. [2021-10-15 19:06:32,175 INFO L132 encePairwiseOnDemand]: 58/62 looper letters, 64 selfloop transitions, 29 changer transitions 0/141 dead transitions. [2021-10-15 19:06:32,175 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 141 transitions, 1584 flow [2021-10-15 19:06:32,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:06:32,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:06:32,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 224 transitions. [2021-10-15 19:06:32,178 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6021505376344086 [2021-10-15 19:06:32,178 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 224 transitions. [2021-10-15 19:06:32,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 224 transitions. [2021-10-15 19:06:32,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:32,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 224 transitions. [2021-10-15 19:06:32,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 37.333333333333336) internal successors, (224), 6 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:32,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 62.0) internal successors, (434), 7 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 19:06:32,185 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 62.0) internal successors, (434), 7 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 19:06:32,185 INFO L186 Difference]: Start difference. First operand has 154 places, 150 transitions, 1508 flow. Second operand 6 states and 224 transitions. [2021-10-15 19:06:32,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 141 transitions, 1584 flow [2021-10-15 19:06:32,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 141 transitions, 1531 flow, removed 11 selfloop flow, removed 12 redundant places. [2021-10-15 19:06:32,213 INFO L242 Difference]: Finished difference. Result has 145 places, 140 transitions, 1393 flow [2021-10-15 19:06:32,214 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=1329, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1393, PETRI_PLACES=145, PETRI_TRANSITIONS=140} [2021-10-15 19:06:32,214 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 104 predicate places. [2021-10-15 19:06:32,214 INFO L470 AbstractCegarLoop]: Abstraction has has 145 places, 140 transitions, 1393 flow [2021-10-15 19:06:32,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.8) internal successors, (184), 5 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:32,214 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:32,215 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:32,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-15 19:06:32,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-15 19:06:32,441 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:06:32,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:32,441 INFO L82 PathProgramCache]: Analyzing trace with hash 75787250, now seen corresponding path program 1 times [2021-10-15 19:06:32,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:32,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654348947] [2021-10-15 19:06:32,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:32,442 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:32,452 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:06:32,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1961896545] [2021-10-15 19:06:32,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:32,452 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:32,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:32,453 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:06:32,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-15 19:06:32,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:32,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 54 conjunts are in the unsatisfiable core [2021-10-15 19:06:32,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:06:34,406 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:06:34,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:34,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654348947] [2021-10-15 19:06:34,406 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:06:34,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961896545] [2021-10-15 19:06:34,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961896545] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:06:34,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:06:34,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-15 19:06:34,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421950362] [2021-10-15 19:06:34,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-15 19:06:34,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:34,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-15 19:06:34,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-10-15 19:06:34,409 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2021-10-15 19:06:34,409 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 140 transitions, 1393 flow. Second operand has 11 states, 11 states have (on average 19.181818181818183) internal successors, (211), 11 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:34,409 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:34,409 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2021-10-15 19:06:34,409 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:35,150 INFO L129 PetriNetUnfolder]: 21/381 cut-off events. [2021-10-15 19:06:35,150 INFO L130 PetriNetUnfolder]: For 1434/1434 co-relation queries the response was YES. [2021-10-15 19:06:35,152 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1889 conditions, 381 events. 21/381 cut-off events. For 1434/1434 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1349 event pairs, 0 based on Foata normal form. 4/382 useless extension candidates. Maximal degree in co-relation 1847. Up to 228 conditions per place. [2021-10-15 19:06:35,155 INFO L132 encePairwiseOnDemand]: 53/62 looper letters, 134 selfloop transitions, 28 changer transitions 0/176 dead transitions. [2021-10-15 19:06:35,155 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 176 transitions, 2034 flow [2021-10-15 19:06:35,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-15 19:06:35,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-15 19:06:35,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 257 transitions. [2021-10-15 19:06:35,156 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.37683284457478006 [2021-10-15 19:06:35,156 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 257 transitions. [2021-10-15 19:06:35,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 257 transitions. [2021-10-15 19:06:35,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:35,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 257 transitions. [2021-10-15 19:06:35,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 23.363636363636363) internal successors, (257), 11 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:35,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 62.0) internal successors, (744), 12 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:35,160 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 62.0) internal successors, (744), 12 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:35,160 INFO L186 Difference]: Start difference. First operand has 145 places, 140 transitions, 1393 flow. Second operand 11 states and 257 transitions. [2021-10-15 19:06:35,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 176 transitions, 2034 flow [2021-10-15 19:06:35,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 176 transitions, 1987 flow, removed 7 selfloop flow, removed 2 redundant places. [2021-10-15 19:06:35,184 INFO L242 Difference]: Finished difference. Result has 155 places, 146 transitions, 1502 flow [2021-10-15 19:06:35,184 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=1354, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1502, PETRI_PLACES=155, PETRI_TRANSITIONS=146} [2021-10-15 19:06:35,184 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 114 predicate places. [2021-10-15 19:06:35,184 INFO L470 AbstractCegarLoop]: Abstraction has has 155 places, 146 transitions, 1502 flow [2021-10-15 19:06:35,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 19.181818181818183) internal successors, (211), 11 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:35,185 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:35,185 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:35,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-15 19:06:35,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-15 19:06:35,401 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:06:35,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:35,401 INFO L82 PathProgramCache]: Analyzing trace with hash -397708876, now seen corresponding path program 3 times [2021-10-15 19:06:35,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:35,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643149785] [2021-10-15 19:06:35,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:35,402 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:35,426 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:06:35,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1646597364] [2021-10-15 19:06:35,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:06:35,441 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:35,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:35,455 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:06:35,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-15 19:06:35,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-15 19:06:35,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:06:35,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-15 19:06:35,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:06:36,603 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-15 19:06:36,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:36,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643149785] [2021-10-15 19:06:36,604 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:06:36,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646597364] [2021-10-15 19:06:36,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646597364] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:06:36,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:06:36,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-15 19:06:36,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674495036] [2021-10-15 19:06:36,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 19:06:36,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:36,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 19:06:36,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-10-15 19:06:36,607 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 62 [2021-10-15 19:06:36,607 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 146 transitions, 1502 flow. Second operand has 9 states, 9 states have (on average 19.88888888888889) internal successors, (179), 9 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:36,607 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:36,607 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 62 [2021-10-15 19:06:36,607 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:36,846 INFO L129 PetriNetUnfolder]: 21/369 cut-off events. [2021-10-15 19:06:36,846 INFO L130 PetriNetUnfolder]: For 1624/1624 co-relation queries the response was YES. [2021-10-15 19:06:36,848 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1850 conditions, 369 events. 21/369 cut-off events. For 1624/1624 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1281 event pairs, 0 based on Foata normal form. 6/372 useless extension candidates. Maximal degree in co-relation 1805. Up to 136 conditions per place. [2021-10-15 19:06:36,851 INFO L132 encePairwiseOnDemand]: 50/62 looper letters, 52 selfloop transitions, 81 changer transitions 0/147 dead transitions. [2021-10-15 19:06:36,851 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 147 transitions, 1774 flow [2021-10-15 19:06:36,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-15 19:06:36,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-15 19:06:36,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2021-10-15 19:06:36,853 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3419354838709677 [2021-10-15 19:06:36,853 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 212 transitions. [2021-10-15 19:06:36,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 212 transitions. [2021-10-15 19:06:36,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:36,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 212 transitions. [2021-10-15 19:06:36,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 21.2) internal successors, (212), 10 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:36,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 62.0) internal successors, (682), 11 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:36,856 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 62.0) internal successors, (682), 11 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:36,856 INFO L186 Difference]: Start difference. First operand has 155 places, 146 transitions, 1502 flow. Second operand 10 states and 212 transitions. [2021-10-15 19:06:36,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 147 transitions, 1774 flow [2021-10-15 19:06:36,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 147 transitions, 1692 flow, removed 11 selfloop flow, removed 9 redundant places. [2021-10-15 19:06:36,881 INFO L242 Difference]: Finished difference. Result has 154 places, 146 transitions, 1614 flow [2021-10-15 19:06:36,882 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=1406, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1614, PETRI_PLACES=154, PETRI_TRANSITIONS=146} [2021-10-15 19:06:36,882 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 113 predicate places. [2021-10-15 19:06:36,882 INFO L470 AbstractCegarLoop]: Abstraction has has 154 places, 146 transitions, 1614 flow [2021-10-15 19:06:36,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.88888888888889) internal successors, (179), 9 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:36,883 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:36,883 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:36,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-15 19:06:37,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-15 19:06:37,097 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:06:37,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:37,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1367297969, now seen corresponding path program 2 times [2021-10-15 19:06:37,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:37,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317661159] [2021-10-15 19:06:37,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:37,098 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:37,119 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:06:37,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1654892897] [2021-10-15 19:06:37,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:06:37,120 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:37,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:37,121 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:06:37,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-15 19:06:37,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:06:37,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:06:37,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-15 19:06:37,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:06:38,915 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:06:38,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:38,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317661159] [2021-10-15 19:06:38,915 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:06:38,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654892897] [2021-10-15 19:06:38,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654892897] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:06:38,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:06:38,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-10-15 19:06:38,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089813607] [2021-10-15 19:06:38,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-15 19:06:38,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:38,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-15 19:06:38,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-10-15 19:06:38,923 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 62 [2021-10-15 19:06:38,924 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 146 transitions, 1614 flow. Second operand has 13 states, 13 states have (on average 19.846153846153847) internal successors, (258), 13 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:38,924 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:38,924 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 62 [2021-10-15 19:06:38,925 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:40,349 INFO L129 PetriNetUnfolder]: 24/424 cut-off events. [2021-10-15 19:06:40,349 INFO L130 PetriNetUnfolder]: For 2027/2027 co-relation queries the response was YES. [2021-10-15 19:06:40,352 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2340 conditions, 424 events. 24/424 cut-off events. For 2027/2027 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1642 event pairs, 0 based on Foata normal form. 4/425 useless extension candidates. Maximal degree in co-relation 2298. Up to 278 conditions per place. [2021-10-15 19:06:40,355 INFO L132 encePairwiseOnDemand]: 49/62 looper letters, 148 selfloop transitions, 25 changer transitions 3/190 dead transitions. [2021-10-15 19:06:40,355 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 190 transitions, 2411 flow [2021-10-15 19:06:40,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-15 19:06:40,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-15 19:06:40,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 361 transitions. [2021-10-15 19:06:40,357 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3639112903225806 [2021-10-15 19:06:40,358 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 361 transitions. [2021-10-15 19:06:40,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 361 transitions. [2021-10-15 19:06:40,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:40,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 361 transitions. [2021-10-15 19:06:40,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 22.5625) internal successors, (361), 16 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:40,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 62.0) internal successors, (1054), 17 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:40,362 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 62.0) internal successors, (1054), 17 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:40,362 INFO L186 Difference]: Start difference. First operand has 154 places, 146 transitions, 1614 flow. Second operand 16 states and 361 transitions. [2021-10-15 19:06:40,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 190 transitions, 2411 flow [2021-10-15 19:06:40,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 190 transitions, 2351 flow, removed 12 selfloop flow, removed 6 redundant places. [2021-10-15 19:06:40,390 INFO L242 Difference]: Finished difference. Result has 168 places, 154 transitions, 1764 flow [2021-10-15 19:06:40,391 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=1567, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1764, PETRI_PLACES=168, PETRI_TRANSITIONS=154} [2021-10-15 19:06:40,391 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 127 predicate places. [2021-10-15 19:06:40,392 INFO L470 AbstractCegarLoop]: Abstraction has has 168 places, 154 transitions, 1764 flow [2021-10-15 19:06:40,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 19.846153846153847) internal successors, (258), 13 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:40,392 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:40,392 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:40,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-15 19:06:40,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-15 19:06:40,605 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:06:40,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:40,605 INFO L82 PathProgramCache]: Analyzing trace with hash 194484878, now seen corresponding path program 3 times [2021-10-15 19:06:40,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:40,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003457655] [2021-10-15 19:06:40,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:40,606 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:40,624 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:06:40,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [393774826] [2021-10-15 19:06:40,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:06:40,624 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:40,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:40,641 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:06:40,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-15 19:06:41,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-15 19:06:41,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:06:41,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-15 19:06:41,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:06:49,623 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-15 19:06:49,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:49,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003457655] [2021-10-15 19:06:49,624 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:06:49,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393774826] [2021-10-15 19:06:49,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393774826] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:49,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:49,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-15 19:06:49,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264513455] [2021-10-15 19:06:49,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-15 19:06:49,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:49,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-15 19:06:49,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=114, Unknown=3, NotChecked=0, Total=156 [2021-10-15 19:06:49,627 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 62 [2021-10-15 19:06:49,627 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 154 transitions, 1764 flow. Second operand has 13 states, 13 states have (on average 12.923076923076923) internal successors, (168), 13 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:49,628 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:49,628 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 62 [2021-10-15 19:06:49,628 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:07:22,386 WARN L207 SmtUtils]: Spent 18.21 s on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-10-15 19:07:40,480 WARN L207 SmtUtils]: Spent 16.08 s on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-10-15 19:08:00,679 WARN L207 SmtUtils]: Spent 18.18 s on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-10-15 19:08:21,025 INFO L129 PetriNetUnfolder]: 24/409 cut-off events. [2021-10-15 19:08:21,026 INFO L130 PetriNetUnfolder]: For 2163/2163 co-relation queries the response was YES. [2021-10-15 19:08:21,028 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2309 conditions, 409 events. 24/409 cut-off events. For 2163/2163 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1542 event pairs, 0 based on Foata normal form. 6/415 useless extension candidates. Maximal degree in co-relation 2264. Up to 95 conditions per place. [2021-10-15 19:08:21,031 INFO L132 encePairwiseOnDemand]: 47/62 looper letters, 52 selfloop transitions, 95 changer transitions 0/154 dead transitions. [2021-10-15 19:08:21,031 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 154 transitions, 2058 flow [2021-10-15 19:08:21,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-15 19:08:21,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-10-15 19:08:21,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 210 transitions. [2021-10-15 19:08:21,033 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.19924098671726756 [2021-10-15 19:08:21,033 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 210 transitions. [2021-10-15 19:08:21,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 210 transitions. [2021-10-15 19:08:21,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:08:21,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 210 transitions. [2021-10-15 19:08:21,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 12.352941176470589) internal successors, (210), 17 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:21,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 62.0) internal successors, (1116), 18 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:21,037 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 62.0) internal successors, (1116), 18 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:21,037 INFO L186 Difference]: Start difference. First operand has 168 places, 154 transitions, 1764 flow. Second operand 17 states and 210 transitions. [2021-10-15 19:08:21,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 154 transitions, 2058 flow [2021-10-15 19:08:21,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 154 transitions, 1979 flow, removed 16 selfloop flow, removed 10 redundant places. [2021-10-15 19:08:21,063 INFO L242 Difference]: Finished difference. Result has 173 places, 154 transitions, 1906 flow [2021-10-15 19:08:21,063 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=1685, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1906, PETRI_PLACES=173, PETRI_TRANSITIONS=154} [2021-10-15 19:08:21,064 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 132 predicate places. [2021-10-15 19:08:21,064 INFO L470 AbstractCegarLoop]: Abstraction has has 173 places, 154 transitions, 1906 flow [2021-10-15 19:08:21,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.923076923076923) internal successors, (168), 13 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:21,064 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:08:21,065 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:08:21,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-15 19:08:21,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-15 19:08:21,273 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:08:21,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:08:21,273 INFO L82 PathProgramCache]: Analyzing trace with hash 194484878, now seen corresponding path program 4 times [2021-10-15 19:08:21,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:08:21,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946121748] [2021-10-15 19:08:21,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:08:21,274 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:08:21,284 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:08:21,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [673885136] [2021-10-15 19:08:21,285 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 19:08:21,285 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:08:21,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:08:21,293 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:08:21,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-15 19:08:21,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 19:08:21,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:08:21,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 19:08:21,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:08:22,071 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:08:22,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:08:22,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946121748] [2021-10-15 19:08:22,072 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:08:22,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673885136] [2021-10-15 19:08:22,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673885136] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:08:22,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:08:22,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-15 19:08:22,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398204211] [2021-10-15 19:08:22,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:08:22,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:08:22,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:08:22,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:08:22,074 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 62 [2021-10-15 19:08:22,075 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 154 transitions, 1906 flow. Second operand has 7 states, 7 states have (on average 36.142857142857146) internal successors, (253), 7 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:22,075 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:08:22,075 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 62 [2021-10-15 19:08:22,075 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:08:22,442 INFO L129 PetriNetUnfolder]: 30/534 cut-off events. [2021-10-15 19:08:22,442 INFO L130 PetriNetUnfolder]: For 3567/3567 co-relation queries the response was YES. [2021-10-15 19:08:22,447 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2933 conditions, 534 events. 30/534 cut-off events. For 3567/3567 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2372 event pairs, 0 based on Foata normal form. 3/534 useless extension candidates. Maximal degree in co-relation 2890. Up to 125 conditions per place. [2021-10-15 19:08:22,450 INFO L132 encePairwiseOnDemand]: 57/62 looper letters, 99 selfloop transitions, 45 changer transitions 0/194 dead transitions. [2021-10-15 19:08:22,450 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 194 transitions, 2712 flow [2021-10-15 19:08:22,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-15 19:08:22,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-15 19:08:22,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 448 transitions. [2021-10-15 19:08:22,453 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6021505376344086 [2021-10-15 19:08:22,454 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 448 transitions. [2021-10-15 19:08:22,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 448 transitions. [2021-10-15 19:08:22,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:08:22,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 448 transitions. [2021-10-15 19:08:22,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 37.333333333333336) internal successors, (448), 12 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:22,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 62.0) internal successors, (806), 13 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:22,458 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 62.0) internal successors, (806), 13 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:22,458 INFO L186 Difference]: Start difference. First operand has 173 places, 154 transitions, 1906 flow. Second operand 12 states and 448 transitions. [2021-10-15 19:08:22,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 194 transitions, 2712 flow [2021-10-15 19:08:22,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 194 transitions, 2436 flow, removed 5 selfloop flow, removed 15 redundant places. [2021-10-15 19:08:22,490 INFO L242 Difference]: Finished difference. Result has 170 places, 166 transitions, 1915 flow [2021-10-15 19:08:22,491 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=1704, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1915, PETRI_PLACES=170, PETRI_TRANSITIONS=166} [2021-10-15 19:08:22,491 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 129 predicate places. [2021-10-15 19:08:22,491 INFO L470 AbstractCegarLoop]: Abstraction has has 170 places, 166 transitions, 1915 flow [2021-10-15 19:08:22,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 36.142857142857146) internal successors, (253), 7 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:22,491 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:08:22,492 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:08:22,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-15 19:08:22,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:08:22,709 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:08:22,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:08:22,710 INFO L82 PathProgramCache]: Analyzing trace with hash -2074616969, now seen corresponding path program 1 times [2021-10-15 19:08:22,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:08:22,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409163324] [2021-10-15 19:08:22,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:08:22,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:08:22,730 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:08:22,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1119905129] [2021-10-15 19:08:22,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:08:22,730 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:08:22,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:08:22,731 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:08:22,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-15 19:08:23,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:08:23,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-15 19:08:23,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:08:23,596 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-15 19:08:23,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:08:23,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409163324] [2021-10-15 19:08:23,597 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:08:23,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119905129] [2021-10-15 19:08:23,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119905129] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:08:23,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:08:23,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 19:08:23,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727843100] [2021-10-15 19:08:23,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:08:23,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:08:23,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:08:23,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:08:23,599 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 62 [2021-10-15 19:08:23,599 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 166 transitions, 1915 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:23,600 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:08:23,600 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 62 [2021-10-15 19:08:23,600 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:08:23,996 INFO L129 PetriNetUnfolder]: 30/492 cut-off events. [2021-10-15 19:08:23,996 INFO L130 PetriNetUnfolder]: For 2544/2544 co-relation queries the response was YES. [2021-10-15 19:08:23,999 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2844 conditions, 492 events. 30/492 cut-off events. For 2544/2544 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2031 event pairs, 0 based on Foata normal form. 21/510 useless extension candidates. Maximal degree in co-relation 2800. Up to 218 conditions per place. [2021-10-15 19:08:24,002 INFO L132 encePairwiseOnDemand]: 52/62 looper letters, 87 selfloop transitions, 61 changer transitions 2/162 dead transitions. [2021-10-15 19:08:24,003 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 162 transitions, 2201 flow [2021-10-15 19:08:24,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:08:24,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 19:08:24,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2021-10-15 19:08:24,004 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.35253456221198154 [2021-10-15 19:08:24,004 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 153 transitions. [2021-10-15 19:08:24,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 153 transitions. [2021-10-15 19:08:24,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:08:24,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 153 transitions. [2021-10-15 19:08:24,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:24,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 62.0) internal successors, (496), 8 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 19:08:24,007 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 62.0) internal successors, (496), 8 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 19:08:24,007 INFO L186 Difference]: Start difference. First operand has 170 places, 166 transitions, 1915 flow. Second operand 7 states and 153 transitions. [2021-10-15 19:08:24,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 162 transitions, 2201 flow [2021-10-15 19:08:24,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 162 transitions, 2057 flow, removed 13 selfloop flow, removed 7 redundant places. [2021-10-15 19:08:24,034 INFO L242 Difference]: Finished difference. Result has 166 places, 160 transitions, 1901 flow [2021-10-15 19:08:24,035 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=1757, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1901, PETRI_PLACES=166, PETRI_TRANSITIONS=160} [2021-10-15 19:08:24,035 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 125 predicate places. [2021-10-15 19:08:24,035 INFO L470 AbstractCegarLoop]: Abstraction has has 166 places, 160 transitions, 1901 flow [2021-10-15 19:08:24,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:24,035 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:08:24,036 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:08:24,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-15 19:08:24,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:08:24,249 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:08:24,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:08:24,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1634778368, now seen corresponding path program 2 times [2021-10-15 19:08:24,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:08:24,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24156808] [2021-10-15 19:08:24,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:08:24,250 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:08:24,260 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:08:24,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1579979010] [2021-10-15 19:08:24,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:08:24,261 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:08:24,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:08:24,277 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:08:24,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-15 19:08:25,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-15 19:08:25,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:08:25,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-15 19:08:25,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:08:33,918 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-15 19:08:33,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:08:33,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24156808] [2021-10-15 19:08:33,919 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:08:33,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579979010] [2021-10-15 19:08:33,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579979010] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:08:33,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:08:33,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-10-15 19:08:33,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843623547] [2021-10-15 19:08:33,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-15 19:08:33,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:08:33,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-15 19:08:33,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-10-15 19:08:33,921 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 62 [2021-10-15 19:08:33,922 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 160 transitions, 1901 flow. Second operand has 13 states, 13 states have (on average 13.538461538461538) internal successors, (176), 13 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:33,922 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:08:33,922 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 62 [2021-10-15 19:08:33,922 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:08:38,035 INFO L129 PetriNetUnfolder]: 30/439 cut-off events. [2021-10-15 19:08:38,035 INFO L130 PetriNetUnfolder]: For 2794/2794 co-relation queries the response was YES. [2021-10-15 19:08:38,038 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2722 conditions, 439 events. 30/439 cut-off events. For 2794/2794 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1607 event pairs, 0 based on Foata normal form. 24/463 useless extension candidates. Maximal degree in co-relation 2680. Up to 253 conditions per place. [2021-10-15 19:08:38,041 INFO L132 encePairwiseOnDemand]: 45/62 looper letters, 53 selfloop transitions, 102 changer transitions 0/159 dead transitions. [2021-10-15 19:08:38,042 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 159 transitions, 2207 flow [2021-10-15 19:08:38,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-15 19:08:38,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-10-15 19:08:38,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 224 transitions. [2021-10-15 19:08:38,044 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.2125237191650854 [2021-10-15 19:08:38,044 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 224 transitions. [2021-10-15 19:08:38,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 224 transitions. [2021-10-15 19:08:38,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:08:38,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 224 transitions. [2021-10-15 19:08:38,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 13.176470588235293) internal successors, (224), 17 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:38,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 62.0) internal successors, (1116), 18 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:38,048 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 62.0) internal successors, (1116), 18 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:38,048 INFO L186 Difference]: Start difference. First operand has 166 places, 160 transitions, 1901 flow. Second operand 17 states and 224 transitions. [2021-10-15 19:08:38,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 159 transitions, 2207 flow [2021-10-15 19:08:38,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 159 transitions, 2153 flow, removed 1 selfloop flow, removed 4 redundant places. [2021-10-15 19:08:38,075 INFO L242 Difference]: Finished difference. Result has 175 places, 159 transitions, 2057 flow [2021-10-15 19:08:38,076 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=1837, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2057, PETRI_PLACES=175, PETRI_TRANSITIONS=159} [2021-10-15 19:08:38,076 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 134 predicate places. [2021-10-15 19:08:38,076 INFO L470 AbstractCegarLoop]: Abstraction has has 175 places, 159 transitions, 2057 flow [2021-10-15 19:08:38,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.538461538461538) internal successors, (176), 13 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:38,077 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:08:38,077 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:08:38,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-15 19:08:38,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-15 19:08:38,293 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:08:38,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:08:38,294 INFO L82 PathProgramCache]: Analyzing trace with hash -841924230, now seen corresponding path program 1 times [2021-10-15 19:08:38,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:08:38,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315948902] [2021-10-15 19:08:38,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:08:38,294 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:08:38,316 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:08:38,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1451631593] [2021-10-15 19:08:38,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:08:38,318 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:08:38,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:08:38,319 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:08:38,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-15 19:08:39,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:08:39,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 89 conjunts are in the unsatisfiable core [2021-10-15 19:08:39,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:08:41,228 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:08:41,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:08:41,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315948902] [2021-10-15 19:08:41,229 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:08:41,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451631593] [2021-10-15 19:08:41,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451631593] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:08:41,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:08:41,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-10-15 19:08:41,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030989767] [2021-10-15 19:08:41,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-15 19:08:41,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:08:41,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-15 19:08:41,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-10-15 19:08:41,232 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 62 [2021-10-15 19:08:41,232 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 159 transitions, 2057 flow. Second operand has 21 states, 21 states have (on average 12.380952380952381) internal successors, (260), 21 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:41,232 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:08:41,232 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 62 [2021-10-15 19:08:41,232 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:08:42,511 INFO L129 PetriNetUnfolder]: 30/438 cut-off events. [2021-10-15 19:08:42,511 INFO L130 PetriNetUnfolder]: For 2985/2985 co-relation queries the response was YES. [2021-10-15 19:08:42,513 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2892 conditions, 438 events. 30/438 cut-off events. For 2985/2985 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1599 event pairs, 0 based on Foata normal form. 1/439 useless extension candidates. Maximal degree in co-relation 2851. Up to 286 conditions per place. [2021-10-15 19:08:42,517 INFO L132 encePairwiseOnDemand]: 48/62 looper letters, 151 selfloop transitions, 46 changer transitions 0/201 dead transitions. [2021-10-15 19:08:42,517 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 201 transitions, 2884 flow [2021-10-15 19:08:42,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-15 19:08:42,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-15 19:08:42,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 316 transitions. [2021-10-15 19:08:42,520 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.2316715542521994 [2021-10-15 19:08:42,520 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 316 transitions. [2021-10-15 19:08:42,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 316 transitions. [2021-10-15 19:08:42,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:08:42,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 316 transitions. [2021-10-15 19:08:42,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 14.363636363636363) internal successors, (316), 22 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:42,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 62.0) internal successors, (1426), 23 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:42,525 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 62.0) internal successors, (1426), 23 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:42,525 INFO L186 Difference]: Start difference. First operand has 175 places, 159 transitions, 2057 flow. Second operand 22 states and 316 transitions. [2021-10-15 19:08:42,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 201 transitions, 2884 flow [2021-10-15 19:08:42,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 201 transitions, 2803 flow, removed 9 selfloop flow, removed 10 redundant places. [2021-10-15 19:08:42,558 INFO L242 Difference]: Finished difference. Result has 191 places, 171 transitions, 2278 flow [2021-10-15 19:08:42,558 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=1984, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2278, PETRI_PLACES=191, PETRI_TRANSITIONS=171} [2021-10-15 19:08:42,559 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 150 predicate places. [2021-10-15 19:08:42,559 INFO L470 AbstractCegarLoop]: Abstraction has has 191 places, 171 transitions, 2278 flow [2021-10-15 19:08:42,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 12.380952380952381) internal successors, (260), 21 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:42,559 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:08:42,559 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:08:42,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-15 19:08:42,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-10-15 19:08:42,778 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:08:42,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:08:42,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1693939171, now seen corresponding path program 5 times [2021-10-15 19:08:42,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:08:42,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184285469] [2021-10-15 19:08:42,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:08:42,779 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:08:42,790 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:08:42,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [503316645] [2021-10-15 19:08:42,790 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-15 19:08:42,791 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:08:42,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:08:42,792 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:08:42,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-15 19:08:43,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-15 19:08:43,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:08:43,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 64 conjunts are in the unsatisfiable core [2021-10-15 19:08:43,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:08:45,086 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:08:45,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:08:45,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184285469] [2021-10-15 19:08:45,086 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:08:45,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503316645] [2021-10-15 19:08:45,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503316645] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:08:45,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:08:45,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-10-15 19:08:45,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628829669] [2021-10-15 19:08:45,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-15 19:08:45,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:08:45,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-15 19:08:45,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-10-15 19:08:45,089 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 62 [2021-10-15 19:08:45,089 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 171 transitions, 2278 flow. Second operand has 15 states, 15 states have (on average 20.066666666666666) internal successors, (301), 15 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:45,089 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:08:45,089 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 62 [2021-10-15 19:08:45,090 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:08:46,312 INFO L129 PetriNetUnfolder]: 34/495 cut-off events. [2021-10-15 19:08:46,312 INFO L130 PetriNetUnfolder]: For 3883/3883 co-relation queries the response was YES. [2021-10-15 19:08:46,315 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3334 conditions, 495 events. 34/495 cut-off events. For 3883/3883 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1982 event pairs, 0 based on Foata normal form. 2/497 useless extension candidates. Maximal degree in co-relation 3288. Up to 374 conditions per place. [2021-10-15 19:08:46,320 INFO L132 encePairwiseOnDemand]: 49/62 looper letters, 179 selfloop transitions, 31 changer transitions 2/223 dead transitions. [2021-10-15 19:08:46,320 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 223 transitions, 3320 flow [2021-10-15 19:08:46,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-15 19:08:46,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-15 19:08:46,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 433 transitions. [2021-10-15 19:08:46,330 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.34919354838709676 [2021-10-15 19:08:46,330 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 433 transitions. [2021-10-15 19:08:46,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 433 transitions. [2021-10-15 19:08:46,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:08:46,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 433 transitions. [2021-10-15 19:08:46,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 21.65) internal successors, (433), 20 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:46,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 62.0) internal successors, (1302), 21 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:46,343 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 62.0) internal successors, (1302), 21 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:46,343 INFO L186 Difference]: Start difference. First operand has 191 places, 171 transitions, 2278 flow. Second operand 20 states and 433 transitions. [2021-10-15 19:08:46,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 223 transitions, 3320 flow [2021-10-15 19:08:46,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 223 transitions, 3257 flow, removed 14 selfloop flow, removed 7 redundant places. [2021-10-15 19:08:46,403 INFO L242 Difference]: Finished difference. Result has 211 places, 184 transitions, 2556 flow [2021-10-15 19:08:46,404 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=2219, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2556, PETRI_PLACES=211, PETRI_TRANSITIONS=184} [2021-10-15 19:08:46,404 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 170 predicate places. [2021-10-15 19:08:46,404 INFO L470 AbstractCegarLoop]: Abstraction has has 211 places, 184 transitions, 2556 flow [2021-10-15 19:08:46,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 20.066666666666666) internal successors, (301), 15 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:46,405 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:08:46,405 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:08:46,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-15 19:08:46,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-15 19:08:46,623 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:08:46,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:08:46,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1543957594, now seen corresponding path program 6 times [2021-10-15 19:08:46,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:08:46,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562418592] [2021-10-15 19:08:46,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:08:46,624 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:08:46,644 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:08:46,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [166235275] [2021-10-15 19:08:46,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-15 19:08:46,644 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:08:46,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:08:46,645 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:08:46,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-15 19:08:49,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-15 19:08:49,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:08:49,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 60 conjunts are in the unsatisfiable core [2021-10-15 19:08:49,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:09:16,827 WARN L207 SmtUtils]: Spent 6.25 s on a formula simplification that was a NOOP. DAG size: 36 [2021-10-15 19:09:38,556 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-15 19:09:38,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:09:38,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562418592] [2021-10-15 19:09:38,556 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:09:38,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166235275] [2021-10-15 19:09:38,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166235275] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:09:38,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:09:38,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-10-15 19:09:38,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703812860] [2021-10-15 19:09:38,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-15 19:09:38,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:09:38,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-15 19:09:38,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=356, Unknown=8, NotChecked=0, Total=462 [2021-10-15 19:09:38,559 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 62 [2021-10-15 19:09:38,559 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 184 transitions, 2556 flow. Second operand has 22 states, 22 states have (on average 12.5) internal successors, (275), 22 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:38,560 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:09:38,560 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 62 [2021-10-15 19:09:38,560 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:10:14,146 WARN L207 SmtUtils]: Spent 10.52 s on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2021-10-15 19:11:21,630 WARN L207 SmtUtils]: Spent 13.72 s on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-10-15 19:12:04,890 WARN L207 SmtUtils]: Spent 8.49 s on a formula simplification that was a NOOP. DAG size: 49 [2021-10-15 19:12:41,504 WARN L207 SmtUtils]: Spent 18.92 s on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-10-15 19:13:00,836 INFO L129 PetriNetUnfolder]: 34/479 cut-off events. [2021-10-15 19:13:00,837 INFO L130 PetriNetUnfolder]: For 4184/4184 co-relation queries the response was YES. [2021-10-15 19:13:00,840 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3349 conditions, 479 events. 34/479 cut-off events. For 4184/4184 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1846 event pairs, 0 based on Foata normal form. 7/486 useless extension candidates. Maximal degree in co-relation 3295. Up to 176 conditions per place. [2021-10-15 19:13:00,842 INFO L132 encePairwiseOnDemand]: 38/62 looper letters, 0 selfloop transitions, 0 changer transitions 181/181 dead transitions. [2021-10-15 19:13:00,842 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 181 transitions, 2906 flow [2021-10-15 19:13:00,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-15 19:13:00,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-10-15 19:13:00,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 350 transitions. [2021-10-15 19:13:00,845 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.1881720430107527 [2021-10-15 19:13:00,845 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 350 transitions. [2021-10-15 19:13:00,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 350 transitions. [2021-10-15 19:13:00,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:13:00,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 350 transitions. [2021-10-15 19:13:00,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 11.666666666666666) internal successors, (350), 30 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:13:00,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 62.0) internal successors, (1922), 31 states have internal predecessors, (1922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:13:00,851 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 62.0) internal successors, (1922), 31 states have internal predecessors, (1922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:13:00,851 INFO L186 Difference]: Start difference. First operand has 211 places, 184 transitions, 2556 flow. Second operand 30 states and 350 transitions. [2021-10-15 19:13:00,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 181 transitions, 2906 flow [2021-10-15 19:13:00,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 181 transitions, 2782 flow, removed 27 selfloop flow, removed 11 redundant places. [2021-10-15 19:13:00,896 INFO L242 Difference]: Finished difference. Result has 223 places, 0 transitions, 0 flow [2021-10-15 19:13:00,897 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=2411, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=0, PETRI_PLACES=223, PETRI_TRANSITIONS=0} [2021-10-15 19:13:00,897 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 182 predicate places. [2021-10-15 19:13:00,897 INFO L470 AbstractCegarLoop]: Abstraction has has 223 places, 0 transitions, 0 flow [2021-10-15 19:13:00,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 12.5) internal successors, (275), 22 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:13:00,900 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:13:00,901 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:13:00,901 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:13:00,901 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:13:00,901 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:13:00,902 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:13:00,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-15 19:13:01,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-15 19:13:01,118 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:13:01,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:13:01 BoogieIcfgContainer [2021-10-15 19:13:01,123 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:13:01,124 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:13:01,124 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:13:01,124 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:13:01,125 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:06:16" (3/4) ... [2021-10-15 19:13:01,129 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:13:01,142 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2021-10-15 19:13:01,142 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 19:13:01,142 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:13:01,143 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:13:01,182 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:13:01,182 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:13:01,183 INFO L168 Benchmark]: Toolchain (without parser) took 405278.25 ms. Allocated memory was 134.2 MB in the beginning and 197.1 MB in the end (delta: 62.9 MB). Free memory was 100.1 MB in the beginning and 52.2 MB in the end (delta: 48.0 MB). Peak memory consumption was 110.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:13:01,183 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 96.5 MB. Free memory is still 50.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:13:01,184 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.74 ms. Allocated memory is still 134.2 MB. Free memory was 99.9 MB in the beginning and 108.3 MB in the end (delta: -8.4 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-15 19:13:01,184 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.56 ms. Allocated memory is still 134.2 MB. Free memory was 108.3 MB in the beginning and 106.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:13:01,185 INFO L168 Benchmark]: Boogie Preprocessor took 27.24 ms. Allocated memory is still 134.2 MB. Free memory was 106.6 MB in the beginning and 105.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:13:01,185 INFO L168 Benchmark]: RCFGBuilder took 344.76 ms. Allocated memory is still 134.2 MB. Free memory was 105.0 MB in the beginning and 93.5 MB in the end (delta: 11.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:13:01,186 INFO L168 Benchmark]: TraceAbstraction took 404521.59 ms. Allocated memory was 134.2 MB in the beginning and 197.1 MB in the end (delta: 62.9 MB). Free memory was 93.0 MB in the beginning and 56.1 MB in the end (delta: 36.9 MB). Peak memory consumption was 128.6 MB. Max. memory is 16.1 GB. [2021-10-15 19:13:01,186 INFO L168 Benchmark]: Witness Printer took 58.54 ms. Allocated memory is still 197.1 MB. Free memory was 56.1 MB in the beginning and 52.2 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:13:01,188 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 96.5 MB. Free memory is still 50.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 279.74 ms. Allocated memory is still 134.2 MB. Free memory was 99.9 MB in the beginning and 108.3 MB in the end (delta: -8.4 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.56 ms. Allocated memory is still 134.2 MB. Free memory was 108.3 MB in the beginning and 106.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.24 ms. Allocated memory is still 134.2 MB. Free memory was 106.6 MB in the beginning and 105.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 344.76 ms. Allocated memory is still 134.2 MB. Free memory was 105.0 MB in the beginning and 93.5 MB in the end (delta: 11.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 404521.59 ms. Allocated memory was 134.2 MB in the beginning and 197.1 MB in the end (delta: 62.9 MB). Free memory was 93.0 MB in the beginning and 56.1 MB in the end (delta: 36.9 MB). Peak memory consumption was 128.6 MB. Max. memory is 16.1 GB. * Witness Printer took 58.54 ms. Allocated memory is still 197.1 MB. Free memory was 56.1 MB in the beginning and 52.2 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.2 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: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 13]: 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, 45 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 8.5ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 404424.3ms, OverallIterations: 24, TraceHistogramMax: 4, EmptinessCheckTime: 0.0ms, AutomataDifference: 308078.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 68.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 378 SDtfs, 1229 SDslu, 1165 SDs, 0 SdLazy, 4560 SolverSat, 476 SolverUnsat, 39 SolverUnknown, 0 SolverNotchecked, 95347.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1026 GetRequests, 700 SyntacticMatches, 0 SemanticMatches, 326 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 263111.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2556occurred in iteration=23, InterpolantAutomatonStates: 293, 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: 220.0ms SsaConstructionTime, 4149.3ms SatisfiabilityAnalysisTime, 77772.0ms InterpolantComputationTime, 916 NumberOfCodeBlocks, 830 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 892 ConstructedInterpolants, 25 QuantifiedInterpolants, 12071 SizeOfPredicates, 323 NumberOfNonLiveVariables, 3497 ConjunctsInSsa, 744 ConjunctsInUnsatCore, 24 InterpolantComputations, 9 PerfectInterpolantSequences, 234/501 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 6 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 19:13:01,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04b3332-cd3e-4ae1-931e-819022185b74/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...