./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-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_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/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_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/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_a965d5bc-9e38-4df8-94ac-67948d4696a3/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 9d6ec4272e5c865bcbf4c963b392e234bf334164 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 19:21:13,613 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:21:13,615 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:21:13,647 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:21:13,648 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:21:13,649 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:21:13,651 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:21:13,653 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:21:13,656 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:21:13,657 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:21:13,658 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:21:13,660 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:21:13,660 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:21:13,662 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:21:13,664 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:21:13,666 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:21:13,667 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:21:13,668 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:21:13,671 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:21:13,673 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:21:13,675 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:21:13,677 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:21:13,679 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:21:13,680 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:21:13,684 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:21:13,685 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:21:13,685 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:21:13,687 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:21:13,687 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:21:13,689 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:21:13,689 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:21:13,691 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:21:13,692 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:21:13,693 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:21:13,694 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:21:13,695 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:21:13,696 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:21:13,696 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:21:13,696 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:21:13,698 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:21:13,699 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:21:13,705 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:21:13,731 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:21:13,732 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:21:13,732 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:21:13,733 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:21:13,734 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:21:13,734 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:21:13,734 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:21:13,735 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:21:13,735 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:21:13,735 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:21:13,735 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:21:13,736 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:21:13,736 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:21:13,736 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:21:13,736 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:21:13,737 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:21:13,737 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:21:13,737 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:21:13,737 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:21:13,738 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:21:13,738 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:21:13,738 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:21:13,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:21:13,739 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:21:13,739 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:21:13,739 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:21:13,739 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:21:13,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:21:13,740 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:21:13,740 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:21:13,740 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:21:13,740 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:21:13,741 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_a965d5bc-9e38-4df8-94ac-67948d4696a3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9d6ec4272e5c865bcbf4c963b392e234bf334164 [2021-10-15 19:21:13,985 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:21:14,022 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:21:14,025 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:21:14,027 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:21:14,028 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:21:14,029 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound100.c [2021-10-15 19:21:14,124 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/data/ae2edd49a/a5e0b4317722453e8036db5473be5c4d/FLAG57d38692b [2021-10-15 19:21:14,624 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:21:14,624 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound100.c [2021-10-15 19:21:14,632 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/data/ae2edd49a/a5e0b4317722453e8036db5473be5c4d/FLAG57d38692b [2021-10-15 19:21:14,973 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/data/ae2edd49a/a5e0b4317722453e8036db5473be5c4d [2021-10-15 19:21:14,976 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:21:14,978 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:21:14,980 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:21:14,980 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:21:14,990 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:21:14,991 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:21:14" (1/1) ... [2021-10-15 19:21:14,995 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1deeab08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:21:14, skipping insertion in model container [2021-10-15 19:21:14,995 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:21:14" (1/1) ... [2021-10-15 19:21:15,003 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:21:15,025 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:21:15,201 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_a965d5bc-9e38-4df8-94ac-67948d4696a3/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound100.c[588,601] [2021-10-15 19:21:15,226 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:21:15,237 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:21:15,253 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_a965d5bc-9e38-4df8-94ac-67948d4696a3/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound100.c[588,601] [2021-10-15 19:21:15,273 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:21:15,293 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:21:15,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:21:15 WrapperNode [2021-10-15 19:21:15,294 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:21:15,296 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:21:15,296 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:21:15,296 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:21:15,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:21:15" (1/1) ... [2021-10-15 19:21:15,332 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:21:15" (1/1) ... [2021-10-15 19:21:15,380 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:21:15,381 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:21:15,381 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:21:15,382 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:21:15,394 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:21:15" (1/1) ... [2021-10-15 19:21:15,394 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:21:15" (1/1) ... [2021-10-15 19:21:15,400 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:21:15" (1/1) ... [2021-10-15 19:21:15,400 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:21:15" (1/1) ... [2021-10-15 19:21:15,416 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:21:15" (1/1) ... [2021-10-15 19:21:15,428 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:21:15" (1/1) ... [2021-10-15 19:21:15,430 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:21:15" (1/1) ... [2021-10-15 19:21:15,433 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:21:15,434 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:21:15,434 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:21:15,434 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:21:15,446 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:21:15" (1/1) ... [2021-10-15 19:21:15,456 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:21:15,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:21:15,490 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:21:15,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:21:15,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:21:15,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:21:15,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:21:15,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:21:15,935 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:21:15,940 INFO L299 CfgBuilder]: Removed 29 assume(true) statements. [2021-10-15 19:21:15,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:21:15 BoogieIcfgContainer [2021-10-15 19:21:15,943 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:21:15,945 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:21:15,947 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:21:15,951 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:21:15,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:21:14" (1/3) ... [2021-10-15 19:21:15,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b2f6af3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:21:15, skipping insertion in model container [2021-10-15 19:21:15,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:21:15" (2/3) ... [2021-10-15 19:21:15,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b2f6af3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:21:15, skipping insertion in model container [2021-10-15 19:21:15,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:21:15" (3/3) ... [2021-10-15 19:21:15,954 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound100.c [2021-10-15 19:21:15,959 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:21:15,959 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2021-10-15 19:21:16,013 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:21:16,021 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 19:21:16,021 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-10-15 19:21:16,035 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 53 places, 67 transitions, 134 flow [2021-10-15 19:21:16,067 INFO L129 PetriNetUnfolder]: 15/67 cut-off events. [2021-10-15 19:21:16,068 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:21:16,070 INFO L84 FinitePrefix]: Finished finitePrefix Result has 68 conditions, 67 events. 15/67 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 129 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-10-15 19:21:16,070 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 67 transitions, 134 flow [2021-10-15 19:21:16,080 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 62 transitions, 124 flow [2021-10-15 19:21:16,091 INFO L129 PetriNetUnfolder]: 3/13 cut-off events. [2021-10-15 19:21:16,092 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:21:16,092 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:21:16,093 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:21:16,095 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-10-15 19:21:16,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:21:16,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1806819375, now seen corresponding path program 1 times [2021-10-15 19:21:16,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:21:16,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989961977] [2021-10-15 19:21:16,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:21:16,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:21:16,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:21:16,416 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 19:21:16,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:21:16,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989961977] [2021-10-15 19:21:16,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989961977] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:21:16,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:21:16,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:21:16,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829752781] [2021-10-15 19:21:16,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:21:16,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:21:16,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:21:16,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:21:16,452 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 67 [2021-10-15 19:21:16,456 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 62 transitions, 124 flow. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:16,456 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:21:16,456 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 67 [2021-10-15 19:21:16,457 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:21:16,641 INFO L129 PetriNetUnfolder]: 1/46 cut-off events. [2021-10-15 19:21:16,642 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:21:16,642 INFO L84 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 46 events. 1/46 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 31 event pairs, 0 based on Foata normal form. 9/46 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2021-10-15 19:21:16,644 INFO L132 encePairwiseOnDemand]: 35/67 looper letters, 16 selfloop transitions, 19 changer transitions 0/46 dead transitions. [2021-10-15 19:21:16,644 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 46 transitions, 162 flow [2021-10-15 19:21:16,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:21:16,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:21:16,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2021-10-15 19:21:16,661 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4253731343283582 [2021-10-15 19:21:16,662 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 114 transitions. [2021-10-15 19:21:16,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 114 transitions. [2021-10-15 19:21:16,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:21:16,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 114 transitions. [2021-10-15 19:21:16,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 28.5) internal successors, (114), 4 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 19:21:16,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 67.0) internal successors, (335), 5 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:16,677 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 67.0) internal successors, (335), 5 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:16,679 INFO L186 Difference]: Start difference. First operand has 49 places, 62 transitions, 124 flow. Second operand 4 states and 114 transitions. [2021-10-15 19:21:16,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 46 transitions, 162 flow [2021-10-15 19:21:16,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 46 transitions, 162 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:21:16,687 INFO L242 Difference]: Finished difference. Result has 49 places, 46 transitions, 151 flow [2021-10-15 19:21:16,690 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=151, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2021-10-15 19:21:16,690 INFO L334 CegarLoopForPetriNet]: 49 programPoint places, 0 predicate places. [2021-10-15 19:21:16,691 INFO L470 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 151 flow [2021-10-15 19:21:16,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:16,691 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:21:16,692 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:21:16,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:21:16,692 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-10-15 19:21:16,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:21:16,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1186787538, now seen corresponding path program 1 times [2021-10-15 19:21:16,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:21:16,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59949336] [2021-10-15 19:21:16,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:21:16,694 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:21:16,716 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:21:16,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1995929445] [2021-10-15 19:21:16,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:21:16,718 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:21:16,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:21:16,720 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:21:16,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:21:16,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:21:16,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 19:21:16,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:21:16,995 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 19:21:16,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:21:16,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59949336] [2021-10-15 19:21:16,996 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:21:16,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995929445] [2021-10-15 19:21:16,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995929445] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:21:16,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:21:16,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:21:16,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059720743] [2021-10-15 19:21:16,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:21:16,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:21:17,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:21:17,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:21:17,009 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 67 [2021-10-15 19:21:17,013 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 151 flow. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:17,013 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:21:17,013 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 67 [2021-10-15 19:21:17,013 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:21:17,190 INFO L129 PetriNetUnfolder]: 1/84 cut-off events. [2021-10-15 19:21:17,191 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-10-15 19:21:17,192 INFO L84 FinitePrefix]: Finished finitePrefix Result has 207 conditions, 84 events. 1/84 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 123 event pairs, 0 based on Foata normal form. 1/83 useless extension candidates. Maximal degree in co-relation 8. Up to 35 conditions per place. [2021-10-15 19:21:17,193 INFO L132 encePairwiseOnDemand]: 62/67 looper letters, 61 selfloop transitions, 4 changer transitions 0/76 dead transitions. [2021-10-15 19:21:17,194 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 76 transitions, 392 flow [2021-10-15 19:21:17,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:21:17,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:21:17,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 130 transitions. [2021-10-15 19:21:17,198 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.48507462686567165 [2021-10-15 19:21:17,198 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 130 transitions. [2021-10-15 19:21:17,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 130 transitions. [2021-10-15 19:21:17,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:21:17,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 130 transitions. [2021-10-15 19:21:17,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 32.5) internal successors, (130), 4 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 19:21:17,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 67.0) internal successors, (335), 5 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:17,204 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 67.0) internal successors, (335), 5 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:17,205 INFO L186 Difference]: Start difference. First operand has 49 places, 46 transitions, 151 flow. Second operand 4 states and 130 transitions. [2021-10-15 19:21:17,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 76 transitions, 392 flow [2021-10-15 19:21:17,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 76 transitions, 356 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:21:17,213 INFO L242 Difference]: Finished difference. Result has 52 places, 49 transitions, 164 flow [2021-10-15 19:21:17,214 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=164, PETRI_PLACES=52, PETRI_TRANSITIONS=49} [2021-10-15 19:21:17,214 INFO L334 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2021-10-15 19:21:17,215 INFO L470 AbstractCegarLoop]: Abstraction has has 52 places, 49 transitions, 164 flow [2021-10-15 19:21:17,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:17,216 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:21:17,216 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:21:17,252 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-15 19:21:17,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:21:17,445 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-10-15 19:21:17,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:21:17,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1958320619, now seen corresponding path program 1 times [2021-10-15 19:21:17,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:21:17,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851930113] [2021-10-15 19:21:17,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:21:17,447 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:21:17,465 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:21:17,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [355705189] [2021-10-15 19:21:17,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:21:17,466 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:21:17,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:21:17,489 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:21:17,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:21:17,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:21:17,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 19:21:17,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:21:17,653 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 19:21:17,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:21:17,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851930113] [2021-10-15 19:21:17,654 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:21:17,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355705189] [2021-10-15 19:21:17,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355705189] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:21:17,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:21:17,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:21:17,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479043023] [2021-10-15 19:21:17,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:21:17,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:21:17,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:21:17,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:21:17,658 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 67 [2021-10-15 19:21:17,658 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 49 transitions, 164 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:17,659 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:21:17,659 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 67 [2021-10-15 19:21:17,659 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:21:17,847 INFO L129 PetriNetUnfolder]: 1/80 cut-off events. [2021-10-15 19:21:17,848 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2021-10-15 19:21:17,848 INFO L84 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 80 events. 1/80 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 112 event pairs, 0 based on Foata normal form. 2/82 useless extension candidates. Maximal degree in co-relation 95. Up to 35 conditions per place. [2021-10-15 19:21:17,849 INFO L132 encePairwiseOnDemand]: 59/67 looper letters, 57 selfloop transitions, 6 changer transitions 0/74 dead transitions. [2021-10-15 19:21:17,849 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 74 transitions, 370 flow [2021-10-15 19:21:17,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:21:17,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:21:17,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2021-10-15 19:21:17,853 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.48134328358208955 [2021-10-15 19:21:17,853 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 129 transitions. [2021-10-15 19:21:17,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 129 transitions. [2021-10-15 19:21:17,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:21:17,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 129 transitions. [2021-10-15 19:21:17,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 32.25) internal successors, (129), 4 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 19:21:17,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 67.0) internal successors, (335), 5 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:17,859 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 67.0) internal successors, (335), 5 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:17,860 INFO L186 Difference]: Start difference. First operand has 52 places, 49 transitions, 164 flow. Second operand 4 states and 129 transitions. [2021-10-15 19:21:17,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 74 transitions, 370 flow [2021-10-15 19:21:17,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 74 transitions, 368 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:21:17,872 INFO L242 Difference]: Finished difference. Result has 56 places, 52 transitions, 206 flow [2021-10-15 19:21:17,873 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=206, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2021-10-15 19:21:17,873 INFO L334 CegarLoopForPetriNet]: 49 programPoint places, 7 predicate places. [2021-10-15 19:21:17,873 INFO L470 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 206 flow [2021-10-15 19:21:17,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:17,874 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:21:17,874 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:21:17,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:21:18,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:21:18,089 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-10-15 19:21:18,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:21:18,089 INFO L82 PathProgramCache]: Analyzing trace with hash -750282760, now seen corresponding path program 1 times [2021-10-15 19:21:18,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:21:18,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731280086] [2021-10-15 19:21:18,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:21:18,090 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:21:18,127 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:21:18,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1202598108] [2021-10-15 19:21:18,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:21:18,128 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:21:18,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:21:18,145 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:21:18,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 19:21:18,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:21:18,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-15 19:21:18,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:21:18,386 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 19:21:18,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:21:18,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731280086] [2021-10-15 19:21:18,387 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:21:18,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202598108] [2021-10-15 19:21:18,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202598108] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:21:18,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:21:18,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:21:18,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28460394] [2021-10-15 19:21:18,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:21:18,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:21:18,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:21:18,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:21:18,395 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 67 [2021-10-15 19:21:18,395 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 206 flow. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:18,395 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:21:18,396 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 67 [2021-10-15 19:21:18,396 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:21:18,521 INFO L129 PetriNetUnfolder]: 1/69 cut-off events. [2021-10-15 19:21:18,522 INFO L130 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2021-10-15 19:21:18,524 INFO L84 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 69 events. 1/69 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 76 event pairs, 0 based on Foata normal form. 6/75 useless extension candidates. Maximal degree in co-relation 102. Up to 34 conditions per place. [2021-10-15 19:21:18,528 INFO L132 encePairwiseOnDemand]: 55/67 looper letters, 41 selfloop transitions, 4 changer transitions 11/68 dead transitions. [2021-10-15 19:21:18,528 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 68 transitions, 376 flow [2021-10-15 19:21:18,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:21:18,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:21:18,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2021-10-15 19:21:18,534 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4388059701492537 [2021-10-15 19:21:18,535 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 147 transitions. [2021-10-15 19:21:18,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 147 transitions. [2021-10-15 19:21:18,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:21:18,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 147 transitions. [2021-10-15 19:21:18,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:18,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 67.0) internal successors, (402), 6 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:18,550 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 67.0) internal successors, (402), 6 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:18,550 INFO L186 Difference]: Start difference. First operand has 56 places, 52 transitions, 206 flow. Second operand 5 states and 147 transitions. [2021-10-15 19:21:18,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 68 transitions, 376 flow [2021-10-15 19:21:18,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 68 transitions, 374 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:21:18,559 INFO L242 Difference]: Finished difference. Result has 61 places, 51 transitions, 220 flow [2021-10-15 19:21:18,560 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=220, PETRI_PLACES=61, PETRI_TRANSITIONS=51} [2021-10-15 19:21:18,560 INFO L334 CegarLoopForPetriNet]: 49 programPoint places, 12 predicate places. [2021-10-15 19:21:18,560 INFO L470 AbstractCegarLoop]: Abstraction has has 61 places, 51 transitions, 220 flow [2021-10-15 19:21:18,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:18,561 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:21:18,561 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:21:18,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 19:21:18,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-10-15 19:21:18,781 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-10-15 19:21:18,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:21:18,781 INFO L82 PathProgramCache]: Analyzing trace with hash 41188983, now seen corresponding path program 1 times [2021-10-15 19:21:18,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:21:18,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384780407] [2021-10-15 19:21:18,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:21:18,782 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:21:18,803 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:21:18,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1466320212] [2021-10-15 19:21:18,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:21:18,804 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:21:18,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:21:18,805 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:21:18,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 19:21:18,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:21:18,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-15 19:21:18,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:21:19,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:21:19,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:21:19,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384780407] [2021-10-15 19:21:19,102 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:21:19,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466320212] [2021-10-15 19:21:19,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466320212] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:21:19,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:21:19,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-15 19:21:19,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943969584] [2021-10-15 19:21:19,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:21:19,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:21:19,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:21:19,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:21:19,105 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 67 [2021-10-15 19:21:19,106 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 51 transitions, 220 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:19,106 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:21:19,106 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 67 [2021-10-15 19:21:19,106 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:21:19,261 INFO L129 PetriNetUnfolder]: 1/96 cut-off events. [2021-10-15 19:21:19,261 INFO L130 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2021-10-15 19:21:19,262 INFO L84 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 96 events. 1/96 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 125 event pairs, 0 based on Foata normal form. 1/97 useless extension candidates. Maximal degree in co-relation 208. Up to 35 conditions per place. [2021-10-15 19:21:19,263 INFO L132 encePairwiseOnDemand]: 60/67 looper letters, 67 selfloop transitions, 9 changer transitions 1/88 dead transitions. [2021-10-15 19:21:19,263 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 88 transitions, 522 flow [2021-10-15 19:21:19,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:21:19,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:21:19,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2021-10-15 19:21:19,265 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.43283582089552236 [2021-10-15 19:21:19,265 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 174 transitions. [2021-10-15 19:21:19,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 174 transitions. [2021-10-15 19:21:19,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:21:19,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 174 transitions. [2021-10-15 19:21:19,266 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 19:21:19,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 67.0) internal successors, (469), 7 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:19,269 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 67.0) internal successors, (469), 7 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:19,269 INFO L186 Difference]: Start difference. First operand has 61 places, 51 transitions, 220 flow. Second operand 6 states and 174 transitions. [2021-10-15 19:21:19,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 88 transitions, 522 flow [2021-10-15 19:21:19,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 88 transitions, 480 flow, removed 15 selfloop flow, removed 4 redundant places. [2021-10-15 19:21:19,275 INFO L242 Difference]: Finished difference. Result has 65 places, 55 transitions, 252 flow [2021-10-15 19:21:19,275 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=252, PETRI_PLACES=65, PETRI_TRANSITIONS=55} [2021-10-15 19:21:19,276 INFO L334 CegarLoopForPetriNet]: 49 programPoint places, 16 predicate places. [2021-10-15 19:21:19,276 INFO L470 AbstractCegarLoop]: Abstraction has has 65 places, 55 transitions, 252 flow [2021-10-15 19:21:19,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:19,276 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:21:19,277 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:21:19,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 19:21:19,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:21:19,490 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-10-15 19:21:19,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:21:19,491 INFO L82 PathProgramCache]: Analyzing trace with hash 928063098, now seen corresponding path program 1 times [2021-10-15 19:21:19,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:21:19,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265211410] [2021-10-15 19:21:19,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:21:19,491 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:21:19,514 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:21:19,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1632336497] [2021-10-15 19:21:19,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:21:19,520 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:21:19,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:21:19,521 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:21:19,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 19:21:19,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:21:19,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-15 19:21:19,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:21:19,841 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 19:21:19,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:21:19,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265211410] [2021-10-15 19:21:19,842 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:21:19,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632336497] [2021-10-15 19:21:19,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632336497] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:21:19,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:21:19,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-15 19:21:19,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750055954] [2021-10-15 19:21:19,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:21:19,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:21:19,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:21:19,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:21:19,845 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 67 [2021-10-15 19:21:19,846 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 55 transitions, 252 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:19,846 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:21:19,846 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 67 [2021-10-15 19:21:19,846 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:21:20,002 INFO L129 PetriNetUnfolder]: 1/94 cut-off events. [2021-10-15 19:21:20,002 INFO L130 PetriNetUnfolder]: For 51/51 co-relation queries the response was YES. [2021-10-15 19:21:20,003 INFO L84 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 94 events. 1/94 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 122 event pairs, 0 based on Foata normal form. 1/95 useless extension candidates. Maximal degree in co-relation 106. Up to 35 conditions per place. [2021-10-15 19:21:20,004 INFO L132 encePairwiseOnDemand]: 61/67 looper letters, 68 selfloop transitions, 7 changer transitions 1/87 dead transitions. [2021-10-15 19:21:20,007 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 87 transitions, 516 flow [2021-10-15 19:21:20,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:21:20,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:21:20,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2021-10-15 19:21:20,009 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.43034825870646765 [2021-10-15 19:21:20,009 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 173 transitions. [2021-10-15 19:21:20,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 173 transitions. [2021-10-15 19:21:20,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:21:20,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 173 transitions. [2021-10-15 19:21:20,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 28.833333333333332) internal successors, (173), 6 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:20,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 67.0) internal successors, (469), 7 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:20,015 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 67.0) internal successors, (469), 7 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:20,015 INFO L186 Difference]: Start difference. First operand has 65 places, 55 transitions, 252 flow. Second operand 6 states and 173 transitions. [2021-10-15 19:21:20,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 87 transitions, 516 flow [2021-10-15 19:21:20,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 87 transitions, 508 flow, removed 3 selfloop flow, removed 1 redundant places. [2021-10-15 19:21:20,026 INFO L242 Difference]: Finished difference. Result has 70 places, 56 transitions, 270 flow [2021-10-15 19:21:20,026 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=270, PETRI_PLACES=70, PETRI_TRANSITIONS=56} [2021-10-15 19:21:20,026 INFO L334 CegarLoopForPetriNet]: 49 programPoint places, 21 predicate places. [2021-10-15 19:21:20,027 INFO L470 AbstractCegarLoop]: Abstraction has has 70 places, 56 transitions, 270 flow [2021-10-15 19:21:20,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:20,027 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:21:20,027 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:21:20,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-15 19:21:20,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:21:20,241 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-10-15 19:21:20,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:21:20,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1484403939, now seen corresponding path program 1 times [2021-10-15 19:21:20,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:21:20,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371810487] [2021-10-15 19:21:20,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:21:20,242 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:21:20,257 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:21:20,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [7141993] [2021-10-15 19:21:20,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:21:20,258 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:21:20,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:21:20,259 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:21:20,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-15 19:21:20,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:21:20,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-15 19:21:20,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:21:20,608 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 19:21:20,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:21:20,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371810487] [2021-10-15 19:21:20,609 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:21:20,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7141993] [2021-10-15 19:21:20,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7141993] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:21:20,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:21:20,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-15 19:21:20,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183433904] [2021-10-15 19:21:20,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:21:20,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:21:20,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:21:20,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:21:20,619 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 67 [2021-10-15 19:21:20,619 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 56 transitions, 270 flow. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:20,620 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:21:20,620 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 67 [2021-10-15 19:21:20,620 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:21:20,743 INFO L129 PetriNetUnfolder]: 1/90 cut-off events. [2021-10-15 19:21:20,743 INFO L130 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2021-10-15 19:21:20,743 INFO L84 FinitePrefix]: Finished finitePrefix Result has 274 conditions, 90 events. 1/90 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 118 event pairs, 0 based on Foata normal form. 2/92 useless extension candidates. Maximal degree in co-relation 107. Up to 34 conditions per place. [2021-10-15 19:21:20,744 INFO L132 encePairwiseOnDemand]: 59/67 looper letters, 62 selfloop transitions, 7 changer transitions 2/83 dead transitions. [2021-10-15 19:21:20,745 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 83 transitions, 508 flow [2021-10-15 19:21:20,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:21:20,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:21:20,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2021-10-15 19:21:20,747 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.43532338308457713 [2021-10-15 19:21:20,747 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 175 transitions. [2021-10-15 19:21:20,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 175 transitions. [2021-10-15 19:21:20,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:21:20,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 175 transitions. [2021-10-15 19:21:20,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 29.166666666666668) internal successors, (175), 6 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 19:21:20,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 67.0) internal successors, (469), 7 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:20,750 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 67.0) internal successors, (469), 7 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:20,751 INFO L186 Difference]: Start difference. First operand has 70 places, 56 transitions, 270 flow. Second operand 6 states and 175 transitions. [2021-10-15 19:21:20,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 83 transitions, 508 flow [2021-10-15 19:21:20,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 83 transitions, 498 flow, removed 1 selfloop flow, removed 3 redundant places. [2021-10-15 19:21:20,757 INFO L242 Difference]: Finished difference. Result has 74 places, 57 transitions, 296 flow [2021-10-15 19:21:20,757 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=296, PETRI_PLACES=74, PETRI_TRANSITIONS=57} [2021-10-15 19:21:20,758 INFO L334 CegarLoopForPetriNet]: 49 programPoint places, 25 predicate places. [2021-10-15 19:21:20,758 INFO L470 AbstractCegarLoop]: Abstraction has has 74 places, 57 transitions, 296 flow [2021-10-15 19:21:20,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:20,758 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:21:20,759 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:21:20,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-15 19:21:20,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:21:20,973 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-10-15 19:21:20,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:21:20,973 INFO L82 PathProgramCache]: Analyzing trace with hash -582886304, now seen corresponding path program 1 times [2021-10-15 19:21:20,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:21:20,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028682803] [2021-10-15 19:21:20,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:21:20,974 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:21:20,986 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:21:20,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1032189215] [2021-10-15 19:21:20,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:21:20,987 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:21:20,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:21:21,001 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:21:21,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-15 19:21:21,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:21:21,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-15 19:21:21,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:21:21,354 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 19:21:21,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:21:21,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028682803] [2021-10-15 19:21:21,355 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:21:21,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032189215] [2021-10-15 19:21:21,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032189215] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:21:21,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:21:21,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-15 19:21:21,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022444617] [2021-10-15 19:21:21,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:21:21,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:21:21,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:21:21,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:21:21,358 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 67 [2021-10-15 19:21:21,359 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 57 transitions, 296 flow. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:21,359 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:21:21,359 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 67 [2021-10-15 19:21:21,359 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:21:21,514 INFO L129 PetriNetUnfolder]: 1/86 cut-off events. [2021-10-15 19:21:21,514 INFO L130 PetriNetUnfolder]: For 80/80 co-relation queries the response was YES. [2021-10-15 19:21:21,515 INFO L84 FinitePrefix]: Finished finitePrefix Result has 280 conditions, 86 events. 1/86 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 100 event pairs, 0 based on Foata normal form. 2/88 useless extension candidates. Maximal degree in co-relation 115. Up to 34 conditions per place. [2021-10-15 19:21:21,516 INFO L132 encePairwiseOnDemand]: 59/67 looper letters, 58 selfloop transitions, 8 changer transitions 3/81 dead transitions. [2021-10-15 19:21:21,516 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 81 transitions, 520 flow [2021-10-15 19:21:21,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:21:21,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 19:21:21,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2021-10-15 19:21:21,518 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4051172707889126 [2021-10-15 19:21:21,519 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 190 transitions. [2021-10-15 19:21:21,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 190 transitions. [2021-10-15 19:21:21,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:21:21,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 190 transitions. [2021-10-15 19:21:21,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 27.142857142857142) internal successors, (190), 7 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:21,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 67.0) internal successors, (536), 8 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:21,524 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 67.0) internal successors, (536), 8 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:21,524 INFO L186 Difference]: Start difference. First operand has 74 places, 57 transitions, 296 flow. Second operand 7 states and 190 transitions. [2021-10-15 19:21:21,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 81 transitions, 520 flow [2021-10-15 19:21:21,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 81 transitions, 510 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-10-15 19:21:21,530 INFO L242 Difference]: Finished difference. Result has 80 places, 59 transitions, 332 flow [2021-10-15 19:21:21,531 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=332, PETRI_PLACES=80, PETRI_TRANSITIONS=59} [2021-10-15 19:21:21,531 INFO L334 CegarLoopForPetriNet]: 49 programPoint places, 31 predicate places. [2021-10-15 19:21:21,531 INFO L470 AbstractCegarLoop]: Abstraction has has 80 places, 59 transitions, 332 flow [2021-10-15 19:21:21,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:21,532 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:21:21,532 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:21:21,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-15 19:21:21,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:21:21,753 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-10-15 19:21:21,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:21:21,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1813911283, now seen corresponding path program 1 times [2021-10-15 19:21:21,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:21:21,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965139887] [2021-10-15 19:21:21,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:21:21,754 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:21:21,778 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:21:21,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [617910140] [2021-10-15 19:21:21,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:21:21,779 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:21:21,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:21:21,781 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:21:21,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-15 19:21:21,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:21:21,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-15 19:21:21,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:21:22,527 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 19:21:22,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:21:22,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965139887] [2021-10-15 19:21:22,528 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:21:22,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617910140] [2021-10-15 19:21:22,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617910140] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:21:22,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:21:22,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-15 19:21:22,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656426477] [2021-10-15 19:21:22,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:21:22,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:21:22,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:21:22,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:21:22,537 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 67 [2021-10-15 19:21:22,538 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 59 transitions, 332 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:22,538 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:21:22,538 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 67 [2021-10-15 19:21:22,539 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:21:22,760 INFO L129 PetriNetUnfolder]: 1/82 cut-off events. [2021-10-15 19:21:22,761 INFO L130 PetriNetUnfolder]: For 103/103 co-relation queries the response was YES. [2021-10-15 19:21:22,761 INFO L84 FinitePrefix]: Finished finitePrefix Result has 290 conditions, 82 events. 1/82 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 81 event pairs, 0 based on Foata normal form. 1/83 useless extension candidates. Maximal degree in co-relation 117. Up to 36 conditions per place. [2021-10-15 19:21:22,762 INFO L132 encePairwiseOnDemand]: 58/67 looper letters, 57 selfloop transitions, 10 changer transitions 2/80 dead transitions. [2021-10-15 19:21:22,762 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 80 transitions, 540 flow [2021-10-15 19:21:22,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 19:21:22,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-15 19:21:22,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2021-10-15 19:21:22,764 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3675373134328358 [2021-10-15 19:21:22,765 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 197 transitions. [2021-10-15 19:21:22,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 197 transitions. [2021-10-15 19:21:22,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:21:22,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 197 transitions. [2021-10-15 19:21:22,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 24.625) internal successors, (197), 8 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:22,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 67.0) internal successors, (603), 9 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:22,769 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 67.0) internal successors, (603), 9 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:22,769 INFO L186 Difference]: Start difference. First operand has 80 places, 59 transitions, 332 flow. Second operand 8 states and 197 transitions. [2021-10-15 19:21:22,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 80 transitions, 540 flow [2021-10-15 19:21:22,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 80 transitions, 512 flow, removed 5 selfloop flow, removed 6 redundant places. [2021-10-15 19:21:22,775 INFO L242 Difference]: Finished difference. Result has 84 places, 62 transitions, 352 flow [2021-10-15 19:21:22,775 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=352, PETRI_PLACES=84, PETRI_TRANSITIONS=62} [2021-10-15 19:21:22,776 INFO L334 CegarLoopForPetriNet]: 49 programPoint places, 35 predicate places. [2021-10-15 19:21:22,776 INFO L470 AbstractCegarLoop]: Abstraction has has 84 places, 62 transitions, 352 flow [2021-10-15 19:21:22,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:22,777 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:21:22,777 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-15 19:21:22,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-15 19:21:22,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:21:22,993 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-10-15 19:21:22,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:21:22,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1811048370, now seen corresponding path program 2 times [2021-10-15 19:21:22,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:21:22,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453202154] [2021-10-15 19:21:22,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:21:22,994 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:21:23,007 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:21:23,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [15640375] [2021-10-15 19:21:23,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:21:23,008 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:21:23,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:21:23,009 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:21:23,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-15 19:21:23,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:21:23,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:21:23,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-15 19:21:23,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:21:23,607 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:21:23,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:21:23,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453202154] [2021-10-15 19:21:23,608 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:21:23,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15640375] [2021-10-15 19:21:23,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15640375] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:21:23,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:21:23,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-15 19:21:23,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161757825] [2021-10-15 19:21:23,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:21:23,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:21:23,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:21:23,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:21:23,612 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 67 [2021-10-15 19:21:23,613 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 62 transitions, 352 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:23,613 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:21:23,613 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 67 [2021-10-15 19:21:23,613 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:21:23,948 INFO L129 PetriNetUnfolder]: 1/120 cut-off events. [2021-10-15 19:21:23,949 INFO L130 PetriNetUnfolder]: For 111/111 co-relation queries the response was YES. [2021-10-15 19:21:23,949 INFO L84 FinitePrefix]: Finished finitePrefix Result has 406 conditions, 120 events. 1/120 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 171 event pairs, 0 based on Foata normal form. 1/121 useless extension candidates. Maximal degree in co-relation 280. Up to 35 conditions per place. [2021-10-15 19:21:23,950 INFO L132 encePairwiseOnDemand]: 59/67 looper letters, 84 selfloop transitions, 13 changer transitions 2/110 dead transitions. [2021-10-15 19:21:23,951 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 110 transitions, 752 flow [2021-10-15 19:21:23,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 19:21:23,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-15 19:21:23,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2021-10-15 19:21:23,954 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4253731343283582 [2021-10-15 19:21:23,954 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 228 transitions. [2021-10-15 19:21:23,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 228 transitions. [2021-10-15 19:21:23,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:21:23,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 228 transitions. [2021-10-15 19:21:23,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 28.5) internal successors, (228), 8 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:23,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 67.0) internal successors, (603), 9 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:23,958 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 67.0) internal successors, (603), 9 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:23,958 INFO L186 Difference]: Start difference. First operand has 84 places, 62 transitions, 352 flow. Second operand 8 states and 228 transitions. [2021-10-15 19:21:23,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 110 transitions, 752 flow [2021-10-15 19:21:23,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 110 transitions, 682 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-10-15 19:21:23,967 INFO L242 Difference]: Finished difference. Result has 88 places, 65 transitions, 373 flow [2021-10-15 19:21:23,969 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=373, PETRI_PLACES=88, PETRI_TRANSITIONS=65} [2021-10-15 19:21:23,969 INFO L334 CegarLoopForPetriNet]: 49 programPoint places, 39 predicate places. [2021-10-15 19:21:23,969 INFO L470 AbstractCegarLoop]: Abstraction has has 88 places, 65 transitions, 373 flow [2021-10-15 19:21:23,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:23,970 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:21:23,970 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:21:24,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-15 19:21:24,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-15 19:21:24,197 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-10-15 19:21:24,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:21:24,197 INFO L82 PathProgramCache]: Analyzing trace with hash -587821098, now seen corresponding path program 1 times [2021-10-15 19:21:24,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:21:24,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028936220] [2021-10-15 19:21:24,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:21:24,198 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:21:24,212 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:21:24,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [714373945] [2021-10-15 19:21:24,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:21:24,213 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:21:24,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:21:24,215 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:21:24,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-15 19:21:24,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:21:24,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-15 19:21:24,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:21:24,921 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 19:21:24,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:21:24,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028936220] [2021-10-15 19:21:24,921 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:21:24,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714373945] [2021-10-15 19:21:24,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714373945] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:21:24,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:21:24,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-15 19:21:24,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714323997] [2021-10-15 19:21:24,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:21:24,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:21:24,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:21:24,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:21:24,925 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 67 [2021-10-15 19:21:24,926 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 65 transitions, 373 flow. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:24,926 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:21:24,926 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 67 [2021-10-15 19:21:24,926 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:21:25,239 INFO L129 PetriNetUnfolder]: 1/118 cut-off events. [2021-10-15 19:21:25,240 INFO L130 PetriNetUnfolder]: For 146/146 co-relation queries the response was YES. [2021-10-15 19:21:25,241 INFO L84 FinitePrefix]: Finished finitePrefix Result has 390 conditions, 118 events. 1/118 cut-off events. For 146/146 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 181 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 275. Up to 66 conditions per place. [2021-10-15 19:21:25,242 INFO L132 encePairwiseOnDemand]: 59/67 looper letters, 61 selfloop transitions, 8 changer transitions 2/82 dead transitions. [2021-10-15 19:21:25,242 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 82 transitions, 563 flow [2021-10-15 19:21:25,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:21:25,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 19:21:25,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2021-10-15 19:21:25,244 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3837953091684435 [2021-10-15 19:21:25,245 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 180 transitions. [2021-10-15 19:21:25,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 180 transitions. [2021-10-15 19:21:25,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:21:25,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 180 transitions. [2021-10-15 19:21:25,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 25.714285714285715) internal successors, (180), 7 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:25,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 67.0) internal successors, (536), 8 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:25,248 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 67.0) internal successors, (536), 8 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:25,248 INFO L186 Difference]: Start difference. First operand has 88 places, 65 transitions, 373 flow. Second operand 7 states and 180 transitions. [2021-10-15 19:21:25,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 82 transitions, 563 flow [2021-10-15 19:21:25,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 82 transitions, 538 flow, removed 6 selfloop flow, removed 4 redundant places. [2021-10-15 19:21:25,254 INFO L242 Difference]: Finished difference. Result has 91 places, 66 transitions, 373 flow [2021-10-15 19:21:25,254 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=373, PETRI_PLACES=91, PETRI_TRANSITIONS=66} [2021-10-15 19:21:25,254 INFO L334 CegarLoopForPetriNet]: 49 programPoint places, 42 predicate places. [2021-10-15 19:21:25,254 INFO L470 AbstractCegarLoop]: Abstraction has has 91 places, 66 transitions, 373 flow [2021-10-15 19:21:25,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:25,255 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:21:25,255 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-15 19:21:25,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-15 19:21:25,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:21:25,468 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-10-15 19:21:25,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:21:25,469 INFO L82 PathProgramCache]: Analyzing trace with hash 955884789, now seen corresponding path program 2 times [2021-10-15 19:21:25,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:21:25,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790096901] [2021-10-15 19:21:25,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:21:25,470 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:21:25,489 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:21:25,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1853630825] [2021-10-15 19:21:25,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:21:25,490 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:21:25,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:21:25,491 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:21:25,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-15 19:21:25,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:21:25,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:21:25,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-15 19:21:25,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:21:26,236 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:21:26,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:21:26,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790096901] [2021-10-15 19:21:26,237 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:21:26,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853630825] [2021-10-15 19:21:26,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853630825] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:21:26,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:21:26,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-15 19:21:26,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545359739] [2021-10-15 19:21:26,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:21:26,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:21:26,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:21:26,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:21:26,242 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 67 [2021-10-15 19:21:26,243 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 66 transitions, 373 flow. Second operand has 8 states, 8 states have (on average 19.75) internal successors, (158), 8 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:26,243 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:21:26,243 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 67 [2021-10-15 19:21:26,243 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:21:27,056 INFO L129 PetriNetUnfolder]: 1/114 cut-off events. [2021-10-15 19:21:27,057 INFO L130 PetriNetUnfolder]: For 142/142 co-relation queries the response was YES. [2021-10-15 19:21:27,057 INFO L84 FinitePrefix]: Finished finitePrefix Result has 383 conditions, 114 events. 1/114 cut-off events. For 142/142 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 152 event pairs, 0 based on Foata normal form. 1/111 useless extension candidates. Maximal degree in co-relation 291. Up to 35 conditions per place. [2021-10-15 19:21:27,058 INFO L132 encePairwiseOnDemand]: 58/67 looper letters, 78 selfloop transitions, 8 changer transitions 10/107 dead transitions. [2021-10-15 19:21:27,058 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 107 transitions, 709 flow [2021-10-15 19:21:27,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 19:21:27,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-15 19:21:27,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 242 transitions. [2021-10-15 19:21:27,061 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4013266998341625 [2021-10-15 19:21:27,061 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 242 transitions. [2021-10-15 19:21:27,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 242 transitions. [2021-10-15 19:21:27,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:21:27,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 242 transitions. [2021-10-15 19:21:27,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 26.88888888888889) internal successors, (242), 9 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:27,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 67.0) internal successors, (670), 10 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:27,066 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 67.0) internal successors, (670), 10 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:27,066 INFO L186 Difference]: Start difference. First operand has 91 places, 66 transitions, 373 flow. Second operand 9 states and 242 transitions. [2021-10-15 19:21:27,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 107 transitions, 709 flow [2021-10-15 19:21:27,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 107 transitions, 695 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-10-15 19:21:27,074 INFO L242 Difference]: Finished difference. Result has 96 places, 62 transitions, 358 flow [2021-10-15 19:21:27,074 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=358, PETRI_PLACES=96, PETRI_TRANSITIONS=62} [2021-10-15 19:21:27,075 INFO L334 CegarLoopForPetriNet]: 49 programPoint places, 47 predicate places. [2021-10-15 19:21:27,075 INFO L470 AbstractCegarLoop]: Abstraction has has 96 places, 62 transitions, 358 flow [2021-10-15 19:21:27,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.75) internal successors, (158), 8 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:27,075 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:21:27,076 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-15 19:21:27,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-15 19:21:27,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:21:27,293 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-10-15 19:21:27,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:21:27,293 INFO L82 PathProgramCache]: Analyzing trace with hash -517562664, now seen corresponding path program 2 times [2021-10-15 19:21:27,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:21:27,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092080163] [2021-10-15 19:21:27,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:21:27,294 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:21:27,306 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:21:27,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1647623343] [2021-10-15 19:21:27,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:21:27,321 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:21:27,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:21:27,323 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:21:27,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-15 19:21:27,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-15 19:21:27,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:21:27,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-15 19:21:27,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:21:31,972 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-15 19:21:31,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:21:31,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092080163] [2021-10-15 19:21:31,973 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:21:31,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647623343] [2021-10-15 19:21:31,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647623343] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:21:31,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:21:31,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-15 19:21:31,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610596328] [2021-10-15 19:21:31,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 19:21:31,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:21:31,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 19:21:31,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-15 19:21:31,976 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 67 [2021-10-15 19:21:31,976 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 62 transitions, 358 flow. Second operand has 9 states, 9 states have (on average 18.333333333333332) internal successors, (165), 9 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:31,976 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:21:31,977 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 67 [2021-10-15 19:21:31,977 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:22:29,208 INFO L129 PetriNetUnfolder]: 1/89 cut-off events. [2021-10-15 19:22:29,208 INFO L130 PetriNetUnfolder]: For 139/139 co-relation queries the response was YES. [2021-10-15 19:22:29,209 INFO L84 FinitePrefix]: Finished finitePrefix Result has 329 conditions, 89 events. 1/89 cut-off events. For 139/139 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 91 event pairs, 0 based on Foata normal form. 6/95 useless extension candidates. Maximal degree in co-relation 260. Up to 27 conditions per place. [2021-10-15 19:22:29,209 INFO L132 encePairwiseOnDemand]: 49/67 looper letters, 16 selfloop transitions, 29 changer transitions 4/56 dead transitions. [2021-10-15 19:22:29,210 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 56 transitions, 437 flow [2021-10-15 19:22:29,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-15 19:22:29,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-15 19:22:29,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 247 transitions. [2021-10-15 19:22:29,212 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.2835820895522388 [2021-10-15 19:22:29,213 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 247 transitions. [2021-10-15 19:22:29,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 247 transitions. [2021-10-15 19:22:29,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:22:29,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 247 transitions. [2021-10-15 19:22:29,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 19.0) internal successors, (247), 13 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:22:29,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 67.0) internal successors, (938), 14 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:22:29,217 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 67.0) internal successors, (938), 14 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:22:29,217 INFO L186 Difference]: Start difference. First operand has 96 places, 62 transitions, 358 flow. Second operand 13 states and 247 transitions. [2021-10-15 19:22:29,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 56 transitions, 437 flow [2021-10-15 19:22:29,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 56 transitions, 391 flow, removed 10 selfloop flow, removed 13 redundant places. [2021-10-15 19:22:29,223 INFO L242 Difference]: Finished difference. Result has 85 places, 52 transitions, 351 flow [2021-10-15 19:22:29,223 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=351, PETRI_PLACES=85, PETRI_TRANSITIONS=52} [2021-10-15 19:22:29,223 INFO L334 CegarLoopForPetriNet]: 49 programPoint places, 36 predicate places. [2021-10-15 19:22:29,224 INFO L470 AbstractCegarLoop]: Abstraction has has 85 places, 52 transitions, 351 flow [2021-10-15 19:22:29,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.333333333333332) internal successors, (165), 9 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:22:29,224 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:22:29,224 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:22:29,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-15 19:22:29,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-15 19:22:29,425 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-10-15 19:22:29,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:22:29,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1745507624, now seen corresponding path program 2 times [2021-10-15 19:22:29,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:22:29,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818270397] [2021-10-15 19:22:29,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:22:29,426 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:22:29,437 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:22:29,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1101091546] [2021-10-15 19:22:29,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:22:29,438 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:22:29,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:22:29,439 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:22:29,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-15 19:22:29,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:22:29,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:22:29,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-15 19:22:29,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:22:30,789 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:22:30,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:22:30,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818270397] [2021-10-15 19:22:30,790 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:22:30,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101091546] [2021-10-15 19:22:30,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101091546] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:22:30,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:22:30,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-15 19:22:30,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693738136] [2021-10-15 19:22:30,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 19:22:30,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:22:30,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 19:22:30,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-15 19:22:30,794 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 67 [2021-10-15 19:22:30,794 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 52 transitions, 351 flow. Second operand has 9 states, 9 states have (on average 20.333333333333332) internal successors, (183), 9 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:22:30,794 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:22:30,795 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 67 [2021-10-15 19:22:30,795 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:22:31,189 INFO L129 PetriNetUnfolder]: 1/76 cut-off events. [2021-10-15 19:22:31,190 INFO L130 PetriNetUnfolder]: For 137/137 co-relation queries the response was YES. [2021-10-15 19:22:31,190 INFO L84 FinitePrefix]: Finished finitePrefix Result has 319 conditions, 76 events. 1/76 cut-off events. For 137/137 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 45 event pairs, 0 based on Foata normal form. 1/75 useless extension candidates. Maximal degree in co-relation 185. Up to 27 conditions per place. [2021-10-15 19:22:31,191 INFO L132 encePairwiseOnDemand]: 57/67 looper letters, 52 selfloop transitions, 8 changer transitions 9/76 dead transitions. [2021-10-15 19:22:31,191 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 76 transitions, 599 flow [2021-10-15 19:22:31,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-15 19:22:31,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-15 19:22:31,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 248 transitions. [2021-10-15 19:22:31,194 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.33649932157394846 [2021-10-15 19:22:31,194 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 248 transitions. [2021-10-15 19:22:31,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 248 transitions. [2021-10-15 19:22:31,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:22:31,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 248 transitions. [2021-10-15 19:22:31,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 22.545454545454547) internal successors, (248), 11 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 19:22:31,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 67.0) internal successors, (804), 12 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:22:31,199 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 67.0) internal successors, (804), 12 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:22:31,199 INFO L186 Difference]: Start difference. First operand has 85 places, 52 transitions, 351 flow. Second operand 11 states and 248 transitions. [2021-10-15 19:22:31,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 76 transitions, 599 flow [2021-10-15 19:22:31,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 76 transitions, 488 flow, removed 4 selfloop flow, removed 9 redundant places. [2021-10-15 19:22:31,206 INFO L242 Difference]: Finished difference. Result has 86 places, 53 transitions, 316 flow [2021-10-15 19:22:31,206 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=316, PETRI_PLACES=86, PETRI_TRANSITIONS=53} [2021-10-15 19:22:31,206 INFO L334 CegarLoopForPetriNet]: 49 programPoint places, 37 predicate places. [2021-10-15 19:22:31,206 INFO L470 AbstractCegarLoop]: Abstraction has has 86 places, 53 transitions, 316 flow [2021-10-15 19:22:31,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.333333333333332) internal successors, (183), 9 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:22:31,207 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:22:31,207 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-10-15 19:22:31,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-15 19:22:31,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-15 19:22:31,414 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-10-15 19:22:31,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:22:31,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1748370537, now seen corresponding path program 3 times [2021-10-15 19:22:31,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:22:31,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984457772] [2021-10-15 19:22:31,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:22:31,417 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:22:31,450 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:22:31,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1288336758] [2021-10-15 19:22:31,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:22:31,452 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:22:31,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:22:31,453 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:22:31,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-15 19:22:31,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-15 19:22:31,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:22:31,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-15 19:22:31,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:22:34,534 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-15 19:22:34,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:22:34,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984457772] [2021-10-15 19:22:34,535 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:22:34,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288336758] [2021-10-15 19:22:34,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288336758] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:22:34,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:22:34,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-15 19:22:34,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457886900] [2021-10-15 19:22:34,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-15 19:22:34,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:22:34,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-15 19:22:34,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=67, Unknown=1, NotChecked=0, Total=90 [2021-10-15 19:22:34,537 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 67 [2021-10-15 19:22:34,538 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 53 transitions, 316 flow. Second operand has 10 states, 10 states have (on average 18.6) internal successors, (186), 10 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 19:22:34,538 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:22:34,538 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 67 [2021-10-15 19:22:34,538 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:22:35,638 INFO L129 PetriNetUnfolder]: 1/66 cut-off events. [2021-10-15 19:22:35,639 INFO L130 PetriNetUnfolder]: For 103/103 co-relation queries the response was YES. [2021-10-15 19:22:35,639 INFO L84 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 66 events. 1/66 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 1/67 useless extension candidates. Maximal degree in co-relation 215. Up to 43 conditions per place. [2021-10-15 19:22:35,640 INFO L132 encePairwiseOnDemand]: 55/67 looper letters, 28 selfloop transitions, 17 changer transitions 0/51 dead transitions. [2021-10-15 19:22:35,640 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 51 transitions, 396 flow [2021-10-15 19:22:35,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:22:35,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:22:35,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 107 transitions. [2021-10-15 19:22:35,642 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3194029850746269 [2021-10-15 19:22:35,642 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 107 transitions. [2021-10-15 19:22:35,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 107 transitions. [2021-10-15 19:22:35,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:22:35,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 107 transitions. [2021-10-15 19:22:35,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 21.4) internal successors, (107), 5 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 19:22:35,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 67.0) internal successors, (402), 6 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:22:35,645 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 67.0) internal successors, (402), 6 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:22:35,645 INFO L186 Difference]: Start difference. First operand has 86 places, 53 transitions, 316 flow. Second operand 5 states and 107 transitions. [2021-10-15 19:22:35,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 51 transitions, 396 flow [2021-10-15 19:22:35,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 51 transitions, 368 flow, removed 7 selfloop flow, removed 9 redundant places. [2021-10-15 19:22:35,649 INFO L242 Difference]: Finished difference. Result has 77 places, 51 transitions, 312 flow [2021-10-15 19:22:35,650 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=312, PETRI_PLACES=77, PETRI_TRANSITIONS=51} [2021-10-15 19:22:35,650 INFO L334 CegarLoopForPetriNet]: 49 programPoint places, 28 predicate places. [2021-10-15 19:22:35,650 INFO L470 AbstractCegarLoop]: Abstraction has has 77 places, 51 transitions, 312 flow [2021-10-15 19:22:35,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.6) internal successors, (186), 10 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 19:22:35,651 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:22:35,651 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-10-15 19:22:35,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-15 19:22:35,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-15 19:22:35,876 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-10-15 19:22:35,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:22:35,877 INFO L82 PathProgramCache]: Analyzing trace with hash -851717222, now seen corresponding path program 3 times [2021-10-15 19:22:35,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:22:35,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209261843] [2021-10-15 19:22:35,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:22:35,878 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:22:35,895 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:22:35,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1677474216] [2021-10-15 19:22:35,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:22:35,896 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:22:35,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:22:35,897 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:22:35,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-15 19:22:36,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-15 19:22:36,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:22:36,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-15 19:22:36,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:22:37,272 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-15 19:22:37,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:22:37,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209261843] [2021-10-15 19:22:37,273 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:22:37,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677474216] [2021-10-15 19:22:37,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677474216] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:22:37,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:22:37,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-10-15 19:22:37,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460751845] [2021-10-15 19:22:37,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-15 19:22:37,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:22:37,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-15 19:22:37,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-10-15 19:22:37,275 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 67 [2021-10-15 19:22:37,275 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 51 transitions, 312 flow. Second operand has 13 states, 13 states have (on average 18.153846153846153) internal successors, (236), 13 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:22:37,275 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:22:37,275 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 67 [2021-10-15 19:22:37,275 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:22:52,344 INFO L129 PetriNetUnfolder]: 1/64 cut-off events. [2021-10-15 19:22:52,344 INFO L130 PetriNetUnfolder]: For 94/94 co-relation queries the response was YES. [2021-10-15 19:22:52,344 INFO L84 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 64 events. 1/64 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 11 event pairs, 0 based on Foata normal form. 1/65 useless extension candidates. Maximal degree in co-relation 155. Up to 49 conditions per place. [2021-10-15 19:22:52,345 INFO L132 encePairwiseOnDemand]: 63/67 looper letters, 41 selfloop transitions, 3 changer transitions 0/49 dead transitions. [2021-10-15 19:22:52,345 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 49 transitions, 390 flow [2021-10-15 19:22:52,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:22:52,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:22:52,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 90 transitions. [2021-10-15 19:22:52,347 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3358208955223881 [2021-10-15 19:22:52,347 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 90 transitions. [2021-10-15 19:22:52,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 90 transitions. [2021-10-15 19:22:52,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:22:52,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 90 transitions. [2021-10-15 19:22:52,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:22:52,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 67.0) internal successors, (335), 5 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:22:52,349 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 67.0) internal successors, (335), 5 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:22:52,349 INFO L186 Difference]: Start difference. First operand has 77 places, 51 transitions, 312 flow. Second operand 4 states and 90 transitions. [2021-10-15 19:22:52,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 49 transitions, 390 flow [2021-10-15 19:22:52,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 49 transitions, 356 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-10-15 19:22:52,353 INFO L242 Difference]: Finished difference. Result has 74 places, 49 transitions, 274 flow [2021-10-15 19:22:52,353 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=274, PETRI_PLACES=74, PETRI_TRANSITIONS=49} [2021-10-15 19:22:52,354 INFO L334 CegarLoopForPetriNet]: 49 programPoint places, 25 predicate places. [2021-10-15 19:22:52,354 INFO L470 AbstractCegarLoop]: Abstraction has has 74 places, 49 transitions, 274 flow [2021-10-15 19:22:52,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 18.153846153846153) internal successors, (236), 13 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:22:52,354 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:22:52,355 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:22:52,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-15 19:22:52,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-15 19:22:52,556 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-10-15 19:22:52,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:22:52,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1402807763, now seen corresponding path program 3 times [2021-10-15 19:22:52,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:22:52,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340855852] [2021-10-15 19:22:52,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:22:52,557 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:22:52,568 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:22:52,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [21062059] [2021-10-15 19:22:52,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:22:52,569 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:22:52,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:22:52,570 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:22:52,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-15 19:22:53,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-15 19:22:53,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:22:53,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 48 conjunts are in the unsatisfiable core [2021-10-15 19:22:53,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:23:05,350 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 45 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-15 19:23:05,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:23:05,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340855852] [2021-10-15 19:23:05,350 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:23:05,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21062059] [2021-10-15 19:23:05,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21062059] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:23:05,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:23:05,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-10-15 19:23:05,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144106932] [2021-10-15 19:23:05,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-15 19:23:05,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:23:05,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-15 19:23:05,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=233, Unknown=3, NotChecked=0, Total=306 [2021-10-15 19:23:05,353 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 67 [2021-10-15 19:23:05,354 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 49 transitions, 274 flow. Second operand has 18 states, 18 states have (on average 17.11111111111111) internal successors, (308), 18 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:23:05,354 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:23:05,354 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 67 [2021-10-15 19:23:05,354 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:23:56,997 INFO L129 PetriNetUnfolder]: 1/58 cut-off events. [2021-10-15 19:23:56,997 INFO L130 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2021-10-15 19:23:56,998 INFO L84 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 58 events. 1/58 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 4 event pairs, 0 based on Foata normal form. 1/59 useless extension candidates. Maximal degree in co-relation 188. Up to 45 conditions per place. [2021-10-15 19:23:56,998 INFO L132 encePairwiseOnDemand]: 59/67 looper letters, 0 selfloop transitions, 0 changer transitions 43/43 dead transitions. [2021-10-15 19:23:56,998 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 43 transitions, 346 flow [2021-10-15 19:23:56,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:23:56,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 19:23:56,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2021-10-15 19:23:56,999 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.279317697228145 [2021-10-15 19:23:56,999 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 131 transitions. [2021-10-15 19:23:56,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 131 transitions. [2021-10-15 19:23:57,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:23:57,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 131 transitions. [2021-10-15 19:23:57,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:23:57,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 67.0) internal successors, (536), 8 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:23:57,002 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 67.0) internal successors, (536), 8 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:23:57,002 INFO L186 Difference]: Start difference. First operand has 74 places, 49 transitions, 274 flow. Second operand 7 states and 131 transitions. [2021-10-15 19:23:57,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 43 transitions, 346 flow [2021-10-15 19:23:57,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 43 transitions, 340 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-10-15 19:23:57,006 INFO L242 Difference]: Finished difference. Result has 71 places, 0 transitions, 0 flow [2021-10-15 19:23:57,006 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=71, PETRI_TRANSITIONS=0} [2021-10-15 19:23:57,006 INFO L334 CegarLoopForPetriNet]: 49 programPoint places, 22 predicate places. [2021-10-15 19:23:57,006 INFO L470 AbstractCegarLoop]: Abstraction has has 71 places, 0 transitions, 0 flow [2021-10-15 19:23:57,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 17.11111111111111) internal successors, (308), 18 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:23:57,009 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:23:57,010 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:23:57,010 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:23:57,010 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:23:57,011 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:23:57,011 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:23:57,011 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:23:57,011 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:23:57,011 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:23:57,012 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:23:57,012 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:23:57,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-15 19:23:57,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-15 19:23:57,221 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:23:57,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:23:57 BoogieIcfgContainer [2021-10-15 19:23:57,226 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:23:57,226 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:23:57,226 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:23:57,227 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:23:57,227 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:21:15" (3/4) ... [2021-10-15 19:23:57,230 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:23:57,244 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2021-10-15 19:23:57,244 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 19:23:57,245 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:23:57,245 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:23:57,286 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:23:57,286 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:23:57,288 INFO L168 Benchmark]: Toolchain (without parser) took 162309.08 ms. Allocated memory was 102.8 MB in the beginning and 157.3 MB in the end (delta: 54.5 MB). Free memory was 71.4 MB in the beginning and 65.6 MB in the end (delta: 5.8 MB). Peak memory consumption was 61.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:23:57,288 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 102.8 MB. Free memory is still 54.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:23:57,289 INFO L168 Benchmark]: CACSL2BoogieTranslator took 315.07 ms. Allocated memory was 102.8 MB in the beginning and 130.0 MB in the end (delta: 27.3 MB). Free memory was 71.4 MB in the beginning and 104.9 MB in the end (delta: -33.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:23:57,289 INFO L168 Benchmark]: Boogie Procedure Inliner took 84.75 ms. Allocated memory is still 130.0 MB. Free memory was 104.9 MB in the beginning and 103.3 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:23:57,290 INFO L168 Benchmark]: Boogie Preprocessor took 51.76 ms. Allocated memory is still 130.0 MB. Free memory was 103.3 MB in the beginning and 102.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:23:57,290 INFO L168 Benchmark]: RCFGBuilder took 509.26 ms. Allocated memory is still 130.0 MB. Free memory was 102.2 MB in the beginning and 90.2 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-15 19:23:57,291 INFO L168 Benchmark]: TraceAbstraction took 161280.96 ms. Allocated memory was 130.0 MB in the beginning and 157.3 MB in the end (delta: 27.3 MB). Free memory was 89.7 MB in the beginning and 68.7 MB in the end (delta: 21.0 MB). Peak memory consumption was 49.3 MB. Max. memory is 16.1 GB. [2021-10-15 19:23:57,292 INFO L168 Benchmark]: Witness Printer took 59.94 ms. Allocated memory is still 157.3 MB. Free memory was 68.7 MB in the beginning and 65.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:23:57,294 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 102.8 MB. Free memory is still 54.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 315.07 ms. Allocated memory was 102.8 MB in the beginning and 130.0 MB in the end (delta: 27.3 MB). Free memory was 71.4 MB in the beginning and 104.9 MB in the end (delta: -33.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 84.75 ms. Allocated memory is still 130.0 MB. Free memory was 104.9 MB in the beginning and 103.3 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 51.76 ms. Allocated memory is still 130.0 MB. Free memory was 103.3 MB in the beginning and 102.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 509.26 ms. Allocated memory is still 130.0 MB. Free memory was 102.2 MB in the beginning and 90.2 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 161280.96 ms. Allocated memory was 130.0 MB in the beginning and 157.3 MB in the end (delta: 27.3 MB). Free memory was 89.7 MB in the beginning and 68.7 MB in the end (delta: 21.0 MB). Peak memory consumption was 49.3 MB. Max. memory is 16.1 GB. * Witness Printer took 59.94 ms. Allocated memory is still 157.3 MB. Free memory was 68.7 MB in the beginning and 65.6 MB in the end (delta: 3.1 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: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: 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, 53 locations, 11 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 5.7ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 161212.4ms, OverallIterations: 17, TraceHistogramMax: 4, EmptinessCheckTime: 0.0ms, AutomataDifference: 128785.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 64.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 307 SDtfs, 638 SDslu, 499 SDs, 0 SdLazy, 1715 SolverSat, 369 SolverUnsat, 39 SolverUnknown, 0 SolverNotchecked, 110467.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 511 GetRequests, 374 SyntacticMatches, 4 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 31596.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=373occurred in iteration=10, InterpolantAutomatonStates: 114, 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: 113.3ms SsaConstructionTime, 1623.0ms SatisfiabilityAnalysisTime, 23732.8ms InterpolantComputationTime, 476 NumberOfCodeBlocks, 388 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 459 ConstructedInterpolants, 0 QuantifiedInterpolants, 4656 SizeOfPredicates, 112 NumberOfNonLiveVariables, 1612 ConjunctsInSsa, 326 ConjunctsInUnsatCore, 17 InterpolantComputations, 5 PerfectInterpolantSequences, 181/314 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 11 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 19:23:57,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a965d5bc-9e38-4df8-94ac-67948d4696a3/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...