./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound10.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_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/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_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/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_779cb567-6894-450d-8e95-b3c8ae87e087/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 894596aca9a1908fd868912b199c54fd3b1d0950 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 19:36:42,609 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:36:42,612 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:36:42,661 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:36:42,662 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:36:42,667 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:36:42,669 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:36:42,673 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:36:42,676 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:36:42,683 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:36:42,685 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:36:42,686 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:36:42,687 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:36:42,689 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:36:42,691 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:36:42,699 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:36:42,700 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:36:42,701 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:36:42,703 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:36:42,705 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:36:42,707 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:36:42,710 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:36:42,714 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:36:42,715 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:36:42,726 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:36:42,726 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:36:42,727 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:36:42,729 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:36:42,729 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:36:42,731 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:36:42,731 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:36:42,732 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:36:42,734 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:36:42,735 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:36:42,736 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:36:42,737 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:36:42,737 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:36:42,738 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:36:42,738 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:36:42,739 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:36:42,739 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:36:42,740 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:36:42,787 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:36:42,788 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:36:42,788 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:36:42,788 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:36:42,789 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:36:42,789 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:36:42,790 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:36:42,790 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:36:42,790 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:36:42,790 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:36:42,790 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:36:42,791 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:36:42,791 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:36:42,791 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:36:42,791 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:36:42,796 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:36:42,796 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:36:42,796 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:36:42,797 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:36:42,797 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:36:42,797 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:36:42,797 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:36:42,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:36:42,798 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:36:42,798 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:36:42,799 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:36:42,799 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:36:42,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:36:42,800 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:36:42,802 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:36:42,802 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:36:42,802 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:36:42,803 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_779cb567-6894-450d-8e95-b3c8ae87e087/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 894596aca9a1908fd868912b199c54fd3b1d0950 [2021-10-15 19:36:43,054 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:36:43,079 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:36:43,082 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:36:43,083 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:36:43,084 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:36:43,085 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound10.c [2021-10-15 19:36:43,160 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/data/d95dbd10f/f1b93a1e6256460fa616b08a65a631e1/FLAGdb5675e3a [2021-10-15 19:36:43,590 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:36:43,591 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound10.c [2021-10-15 19:36:43,603 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/data/d95dbd10f/f1b93a1e6256460fa616b08a65a631e1/FLAGdb5675e3a [2021-10-15 19:36:43,976 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/data/d95dbd10f/f1b93a1e6256460fa616b08a65a631e1 [2021-10-15 19:36:43,979 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:36:43,980 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:36:43,982 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:36:43,982 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:36:43,985 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:36:43,986 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:36:43" (1/1) ... [2021-10-15 19:36:43,987 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3094aed6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:36:43, skipping insertion in model container [2021-10-15 19:36:43,987 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:36:43" (1/1) ... [2021-10-15 19:36:43,994 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:36:44,008 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:36:44,154 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_779cb567-6894-450d-8e95-b3c8ae87e087/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound10.c[458,471] [2021-10-15 19:36:44,168 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:36:44,176 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:36:44,188 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_779cb567-6894-450d-8e95-b3c8ae87e087/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound10.c[458,471] [2021-10-15 19:36:44,206 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:36:44,224 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:36:44,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:36:44 WrapperNode [2021-10-15 19:36:44,226 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:36:44,230 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:36:44,231 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:36:44,231 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:36:44,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:36:44" (1/1) ... [2021-10-15 19:36:44,246 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:36:44" (1/1) ... [2021-10-15 19:36:44,270 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:36:44,271 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:36:44,271 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:36:44,271 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:36:44,279 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:36:44" (1/1) ... [2021-10-15 19:36:44,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:36:44" (1/1) ... [2021-10-15 19:36:44,290 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:36:44" (1/1) ... [2021-10-15 19:36:44,291 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:36:44" (1/1) ... [2021-10-15 19:36:44,298 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:36:44" (1/1) ... [2021-10-15 19:36:44,302 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:36:44" (1/1) ... [2021-10-15 19:36:44,303 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:36:44" (1/1) ... [2021-10-15 19:36:44,305 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:36:44,305 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:36:44,306 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:36:44,306 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:36:44,313 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:36:44" (1/1) ... [2021-10-15 19:36:44,321 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:36:44,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:36:44,345 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:36:44,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:36:44,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:36:44,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:36:44,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:36:44,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:36:44,597 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:36:44,597 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-15 19:36:44,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:36:44 BoogieIcfgContainer [2021-10-15 19:36:44,609 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:36:44,617 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:36:44,617 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:36:44,625 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:36:44,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:36:43" (1/3) ... [2021-10-15 19:36:44,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@305e8895 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:36:44, skipping insertion in model container [2021-10-15 19:36:44,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:36:44" (2/3) ... [2021-10-15 19:36:44,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@305e8895 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:36:44, skipping insertion in model container [2021-10-15 19:36:44,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:36:44" (3/3) ... [2021-10-15 19:36:44,628 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound10.c [2021-10-15 19:36:44,646 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:36:44,646 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-15 19:36:44,694 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:36:44,701 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 19:36:44,702 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-15 19:36:44,711 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 20 places, 25 transitions, 50 flow [2021-10-15 19:36:44,731 INFO L129 PetriNetUnfolder]: 6/25 cut-off events. [2021-10-15 19:36:44,732 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:36:44,734 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 25 events. 6/25 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 34 event pairs, 0 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-10-15 19:36:44,734 INFO L82 GeneralOperation]: Start removeDead. Operand has 20 places, 25 transitions, 50 flow [2021-10-15 19:36:44,738 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 16 places, 20 transitions, 40 flow [2021-10-15 19:36:44,742 INFO L129 PetriNetUnfolder]: 5/15 cut-off events. [2021-10-15 19:36:44,742 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:36:44,743 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:36:44,743 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-15 19:36:44,744 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:36:44,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:36:44,749 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2021-10-15 19:36:44,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:36:44,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876098714] [2021-10-15 19:36:44,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:36:44,769 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:36:44,851 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:36:44,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [93726446] [2021-10-15 19:36:44,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:36:44,853 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:36:44,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:36:44,855 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:36:44,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:36:44,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:36:44,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 19:36:44,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:36:45,093 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 19:36:45,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:36:45,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876098714] [2021-10-15 19:36:45,094 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:36:45,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93726446] [2021-10-15 19:36:45,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93726446] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:36:45,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:36:45,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:36:45,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62120698] [2021-10-15 19:36:45,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:36:45,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:36:45,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:36:45,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:36:45,122 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 25 [2021-10-15 19:36:45,125 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 16 places, 20 transitions, 40 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:45,125 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:36:45,125 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 25 [2021-10-15 19:36:45,126 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:36:45,187 INFO L129 PetriNetUnfolder]: 4/31 cut-off events. [2021-10-15 19:36:45,187 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:36:45,188 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 31 events. 4/31 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 46 event pairs, 0 based on Foata normal form. 6/35 useless extension candidates. Maximal degree in co-relation 2. Up to 12 conditions per place. [2021-10-15 19:36:45,190 INFO L132 encePairwiseOnDemand]: 15/25 looper letters, 10 selfloop transitions, 5 changer transitions 4/26 dead transitions. [2021-10-15 19:36:45,190 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 26 transitions, 90 flow [2021-10-15 19:36:45,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:36:45,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:36:45,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2021-10-15 19:36:45,202 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.616 [2021-10-15 19:36:45,202 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 77 transitions. [2021-10-15 19:36:45,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 77 transitions. [2021-10-15 19:36:45,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:36:45,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 77 transitions. [2021-10-15 19:36:45,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:45,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:45,213 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:45,215 INFO L186 Difference]: Start difference. First operand has 16 places, 20 transitions, 40 flow. Second operand 5 states and 77 transitions. [2021-10-15 19:36:45,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 26 transitions, 90 flow [2021-10-15 19:36:45,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 26 transitions, 90 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:36:45,221 INFO L242 Difference]: Finished difference. Result has 23 places, 21 transitions, 73 flow [2021-10-15 19:36:45,222 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=73, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2021-10-15 19:36:45,223 INFO L334 CegarLoopForPetriNet]: 16 programPoint places, 7 predicate places. [2021-10-15 19:36:45,223 INFO L470 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 73 flow [2021-10-15 19:36:45,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:45,224 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:36:45,224 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-10-15 19:36:45,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:36:45,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-10-15 19:36:45,441 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:36:45,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:36:45,441 INFO L82 PathProgramCache]: Analyzing trace with hash 855725686, now seen corresponding path program 1 times [2021-10-15 19:36:45,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:36:45,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290509309] [2021-10-15 19:36:45,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:36:45,442 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:36:45,457 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:36:45,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2118626262] [2021-10-15 19:36:45,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:36:45,458 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:36:45,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:36:45,459 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:36:45,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:36:45,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:36:45,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-15 19:36:45,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:36:45,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:36:45,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:36:45,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290509309] [2021-10-15 19:36:45,713 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:36:45,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118626262] [2021-10-15 19:36:45,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118626262] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:36:45,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:36:45,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-15 19:36:45,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814281977] [2021-10-15 19:36:45,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:36:45,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:36:45,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:36:45,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:36:45,724 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 25 [2021-10-15 19:36:45,727 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 73 flow. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:45,727 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:36:45,727 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 25 [2021-10-15 19:36:45,728 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:36:45,826 INFO L129 PetriNetUnfolder]: 4/42 cut-off events. [2021-10-15 19:36:45,827 INFO L130 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2021-10-15 19:36:45,828 INFO L84 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 42 events. 4/42 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 72 event pairs, 0 based on Foata normal form. 2/44 useless extension candidates. Maximal degree in co-relation 51. Up to 12 conditions per place. [2021-10-15 19:36:45,829 INFO L132 encePairwiseOnDemand]: 18/25 looper letters, 13 selfloop transitions, 8 changer transitions 5/33 dead transitions. [2021-10-15 19:36:45,829 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 33 transitions, 167 flow [2021-10-15 19:36:45,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:36:45,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 19:36:45,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 97 transitions. [2021-10-15 19:36:45,835 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5542857142857143 [2021-10-15 19:36:45,835 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 97 transitions. [2021-10-15 19:36:45,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 97 transitions. [2021-10-15 19:36:45,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:36:45,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 97 transitions. [2021-10-15 19:36:45,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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 19:36:45,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 25.0) internal successors, (200), 8 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:45,841 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 25.0) internal successors, (200), 8 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:45,842 INFO L186 Difference]: Start difference. First operand has 23 places, 21 transitions, 73 flow. Second operand 7 states and 97 transitions. [2021-10-15 19:36:45,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 33 transitions, 167 flow [2021-10-15 19:36:45,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 33 transitions, 167 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:36:45,861 INFO L242 Difference]: Finished difference. Result has 32 places, 25 transitions, 130 flow [2021-10-15 19:36:45,862 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=130, PETRI_PLACES=32, PETRI_TRANSITIONS=25} [2021-10-15 19:36:45,862 INFO L334 CegarLoopForPetriNet]: 16 programPoint places, 16 predicate places. [2021-10-15 19:36:45,862 INFO L470 AbstractCegarLoop]: Abstraction has has 32 places, 25 transitions, 130 flow [2021-10-15 19:36:45,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:45,863 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:36:45,863 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:36:45,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:36:46,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:36:46,080 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:36:46,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:36:46,081 INFO L82 PathProgramCache]: Analyzing trace with hash 757648847, now seen corresponding path program 1 times [2021-10-15 19:36:46,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:36:46,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57550750] [2021-10-15 19:36:46,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:36:46,082 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:36:46,096 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:36:46,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [126169971] [2021-10-15 19:36:46,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:36:46,096 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:36:46,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:36:46,097 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:36:46,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 19:36:46,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:36:46,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-15 19:36:46,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:36:46,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:36:46,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:36:46,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57550750] [2021-10-15 19:36:46,209 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:36:46,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126169971] [2021-10-15 19:36:46,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126169971] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:36:46,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:36:46,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-10-15 19:36:46,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253600416] [2021-10-15 19:36:46,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:36:46,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:36:46,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:36:46,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:36:46,212 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 25 [2021-10-15 19:36:46,213 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 130 flow. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:46,213 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:36:46,213 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 25 [2021-10-15 19:36:46,213 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:36:46,252 INFO L129 PetriNetUnfolder]: 3/35 cut-off events. [2021-10-15 19:36:46,253 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-10-15 19:36:46,253 INFO L84 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 35 events. 3/35 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 52 event pairs, 0 based on Foata normal form. 2/37 useless extension candidates. Maximal degree in co-relation 70. Up to 8 conditions per place. [2021-10-15 19:36:46,254 INFO L132 encePairwiseOnDemand]: 21/25 looper letters, 5 selfloop transitions, 5 changer transitions 0/26 dead transitions. [2021-10-15 19:36:46,254 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 26 transitions, 145 flow [2021-10-15 19:36:46,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:36:46,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:36:46,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2021-10-15 19:36:46,256 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7133333333333334 [2021-10-15 19:36:46,256 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 107 transitions. [2021-10-15 19:36:46,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 107 transitions. [2021-10-15 19:36:46,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:36:46,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 107 transitions. [2021-10-15 19:36:46,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 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 19:36:46,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 25.0) internal successors, (175), 7 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:46,259 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 25.0) internal successors, (175), 7 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:46,259 INFO L186 Difference]: Start difference. First operand has 32 places, 25 transitions, 130 flow. Second operand 6 states and 107 transitions. [2021-10-15 19:36:46,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 26 transitions, 145 flow [2021-10-15 19:36:46,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 26 transitions, 115 flow, removed 11 selfloop flow, removed 4 redundant places. [2021-10-15 19:36:46,263 INFO L242 Difference]: Finished difference. Result has 35 places, 26 transitions, 115 flow [2021-10-15 19:36:46,263 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=115, PETRI_PLACES=35, PETRI_TRANSITIONS=26} [2021-10-15 19:36:46,264 INFO L334 CegarLoopForPetriNet]: 16 programPoint places, 19 predicate places. [2021-10-15 19:36:46,264 INFO L470 AbstractCegarLoop]: Abstraction has has 35 places, 26 transitions, 115 flow [2021-10-15 19:36:46,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:46,264 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:36:46,264 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:36:46,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 19:36:46,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:36:46,480 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:36:46,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:36:46,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1997070616, now seen corresponding path program 1 times [2021-10-15 19:36:46,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:36:46,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033146676] [2021-10-15 19:36:46,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:36:46,481 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:36:46,493 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:36:46,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1469497638] [2021-10-15 19:36:46,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:36:46,494 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:36:46,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:36:46,495 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:36:46,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 19:36:46,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:36:46,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-15 19:36:46,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:36:46,833 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 19:36:46,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:36:46,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033146676] [2021-10-15 19:36:46,835 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:36:46,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469497638] [2021-10-15 19:36:46,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469497638] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:36:46,836 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:36:46,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-15 19:36:46,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404563109] [2021-10-15 19:36:46,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:36:46,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:36:46,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:36:46,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:36:46,844 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 25 [2021-10-15 19:36:46,844 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 115 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:46,845 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:36:46,845 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 25 [2021-10-15 19:36:46,846 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:36:46,942 INFO L129 PetriNetUnfolder]: 3/33 cut-off events. [2021-10-15 19:36:46,942 INFO L130 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2021-10-15 19:36:46,943 INFO L84 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 33 events. 3/33 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 40 event pairs, 0 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 79. Up to 14 conditions per place. [2021-10-15 19:36:46,945 INFO L132 encePairwiseOnDemand]: 20/25 looper letters, 16 selfloop transitions, 3 changer transitions 4/31 dead transitions. [2021-10-15 19:36:46,945 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 31 transitions, 171 flow [2021-10-15 19:36:46,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:36:46,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:36:46,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 76 transitions. [2021-10-15 19:36:46,948 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5066666666666667 [2021-10-15 19:36:46,948 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 76 transitions. [2021-10-15 19:36:46,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 76 transitions. [2021-10-15 19:36:46,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:36:46,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 76 transitions. [2021-10-15 19:36:46,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:46,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 25.0) internal successors, (175), 7 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:46,953 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 25.0) internal successors, (175), 7 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:46,953 INFO L186 Difference]: Start difference. First operand has 35 places, 26 transitions, 115 flow. Second operand 6 states and 76 transitions. [2021-10-15 19:36:46,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 31 transitions, 171 flow [2021-10-15 19:36:46,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 31 transitions, 167 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:36:46,958 INFO L242 Difference]: Finished difference. Result has 40 places, 25 transitions, 117 flow [2021-10-15 19:36:46,958 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=117, PETRI_PLACES=40, PETRI_TRANSITIONS=25} [2021-10-15 19:36:46,958 INFO L334 CegarLoopForPetriNet]: 16 programPoint places, 24 predicate places. [2021-10-15 19:36:46,959 INFO L470 AbstractCegarLoop]: Abstraction has has 40 places, 25 transitions, 117 flow [2021-10-15 19:36:46,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:46,959 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:36:46,959 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2021-10-15 19:36:46,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 19:36:47,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:36:47,174 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:36:47,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:36:47,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1778536670, now seen corresponding path program 2 times [2021-10-15 19:36:47,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:36:47,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308662255] [2021-10-15 19:36:47,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:36:47,175 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:36:47,186 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:36:47,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [948972887] [2021-10-15 19:36:47,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:36:47,187 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:36:47,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:36:47,192 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:36:47,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 19:36:47,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:36:47,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:36:47,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-15 19:36:47,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:36:47,484 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 19:36:47,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:36:47,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308662255] [2021-10-15 19:36:47,484 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:36:47,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948972887] [2021-10-15 19:36:47,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948972887] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:36:47,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:36:47,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-15 19:36:47,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109923219] [2021-10-15 19:36:47,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:36:47,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:36:47,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:36:47,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:36:47,487 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 25 [2021-10-15 19:36:47,487 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 25 transitions, 117 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:47,487 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:36:47,487 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 25 [2021-10-15 19:36:47,487 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:36:47,593 INFO L129 PetriNetUnfolder]: 4/42 cut-off events. [2021-10-15 19:36:47,593 INFO L130 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2021-10-15 19:36:47,593 INFO L84 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 42 events. 4/42 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 56 event pairs, 0 based on Foata normal form. 2/44 useless extension candidates. Maximal degree in co-relation 110. Up to 12 conditions per place. [2021-10-15 19:36:47,593 INFO L132 encePairwiseOnDemand]: 18/25 looper letters, 15 selfloop transitions, 9 changer transitions 2/35 dead transitions. [2021-10-15 19:36:47,594 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 35 transitions, 205 flow [2021-10-15 19:36:47,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 19:36:47,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-15 19:36:47,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 107 transitions. [2021-10-15 19:36:47,599 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.535 [2021-10-15 19:36:47,599 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 107 transitions. [2021-10-15 19:36:47,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 107 transitions. [2021-10-15 19:36:47,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:36:47,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 107 transitions. [2021-10-15 19:36:47,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:47,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 25.0) internal successors, (225), 9 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:47,601 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 25.0) internal successors, (225), 9 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:47,601 INFO L186 Difference]: Start difference. First operand has 40 places, 25 transitions, 117 flow. Second operand 8 states and 107 transitions. [2021-10-15 19:36:47,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 35 transitions, 205 flow [2021-10-15 19:36:47,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 35 transitions, 191 flow, removed 4 selfloop flow, removed 5 redundant places. [2021-10-15 19:36:47,614 INFO L242 Difference]: Finished difference. Result has 42 places, 29 transitions, 166 flow [2021-10-15 19:36:47,615 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=166, PETRI_PLACES=42, PETRI_TRANSITIONS=29} [2021-10-15 19:36:47,615 INFO L334 CegarLoopForPetriNet]: 16 programPoint places, 26 predicate places. [2021-10-15 19:36:47,615 INFO L470 AbstractCegarLoop]: Abstraction has has 42 places, 29 transitions, 166 flow [2021-10-15 19:36:47,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:47,615 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:36:47,616 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-15 19:36:47,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-15 19:36:47,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:36:47,825 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:36:47,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:36:47,825 INFO L82 PathProgramCache]: Analyzing trace with hash 699894435, now seen corresponding path program 2 times [2021-10-15 19:36:47,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:36:47,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278166954] [2021-10-15 19:36:47,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:36:47,826 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:36:47,836 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:36:47,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [755879324] [2021-10-15 19:36:47,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:36:47,837 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:36:47,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:36:47,838 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:36:47,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-15 19:36:47,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:36:47,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:36:47,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 19:36:47,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:36:47,985 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 19:36:47,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:36:47,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278166954] [2021-10-15 19:36:47,986 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:36:47,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755879324] [2021-10-15 19:36:47,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755879324] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:36:47,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:36:47,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-15 19:36:47,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458818532] [2021-10-15 19:36:47,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:36:47,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:36:47,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:36:47,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:36:47,992 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 25 [2021-10-15 19:36:47,992 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 29 transitions, 166 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:47,992 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:36:47,992 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 25 [2021-10-15 19:36:47,993 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:36:48,044 INFO L129 PetriNetUnfolder]: 3/39 cut-off events. [2021-10-15 19:36:48,044 INFO L130 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2021-10-15 19:36:48,046 INFO L84 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 39 events. 3/39 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 51 event pairs, 0 based on Foata normal form. 1/38 useless extension candidates. Maximal degree in co-relation 98. Up to 8 conditions per place. [2021-10-15 19:36:48,046 INFO L132 encePairwiseOnDemand]: 21/25 looper letters, 5 selfloop transitions, 7 changer transitions 0/29 dead transitions. [2021-10-15 19:36:48,047 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 29 transitions, 185 flow [2021-10-15 19:36:48,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 19:36:48,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-15 19:36:48,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2021-10-15 19:36:48,050 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7 [2021-10-15 19:36:48,050 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 140 transitions. [2021-10-15 19:36:48,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 140 transitions. [2021-10-15 19:36:48,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:36:48,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 140 transitions. [2021-10-15 19:36:48,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:48,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 25.0) internal successors, (225), 9 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:48,053 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 25.0) internal successors, (225), 9 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:48,053 INFO L186 Difference]: Start difference. First operand has 42 places, 29 transitions, 166 flow. Second operand 8 states and 140 transitions. [2021-10-15 19:36:48,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 29 transitions, 185 flow [2021-10-15 19:36:48,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 29 transitions, 165 flow, removed 7 selfloop flow, removed 3 redundant places. [2021-10-15 19:36:48,060 INFO L242 Difference]: Finished difference. Result has 48 places, 29 transitions, 163 flow [2021-10-15 19:36:48,060 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=163, PETRI_PLACES=48, PETRI_TRANSITIONS=29} [2021-10-15 19:36:48,060 INFO L334 CegarLoopForPetriNet]: 16 programPoint places, 32 predicate places. [2021-10-15 19:36:48,060 INFO L470 AbstractCegarLoop]: Abstraction has has 48 places, 29 transitions, 163 flow [2021-10-15 19:36:48,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:48,061 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:36:48,061 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-10-15 19:36:48,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-15 19:36:48,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:36:48,275 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:36:48,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:36:48,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1664485700, now seen corresponding path program 2 times [2021-10-15 19:36:48,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:36:48,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599464748] [2021-10-15 19:36:48,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:36:48,276 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:36:48,286 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:36:48,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1927760201] [2021-10-15 19:36:48,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:36:48,287 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:36:48,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:36:48,288 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:36:48,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-15 19:36:48,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:36:48,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:36:48,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-15 19:36:48,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:36:48,602 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:36:48,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:36:48,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599464748] [2021-10-15 19:36:48,602 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:36:48,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927760201] [2021-10-15 19:36:48,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927760201] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:36:48,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:36:48,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-15 19:36:48,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283887104] [2021-10-15 19:36:48,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:36:48,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:36:48,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:36:48,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:36:48,605 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 25 [2021-10-15 19:36:48,606 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 29 transitions, 163 flow. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:48,606 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:36:48,606 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 25 [2021-10-15 19:36:48,606 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:36:48,679 INFO L129 PetriNetUnfolder]: 3/37 cut-off events. [2021-10-15 19:36:48,680 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2021-10-15 19:36:48,680 INFO L84 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 37 events. 3/37 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 39 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 110. Up to 14 conditions per place. [2021-10-15 19:36:48,681 INFO L132 encePairwiseOnDemand]: 20/25 looper letters, 18 selfloop transitions, 4 changer transitions 4/35 dead transitions. [2021-10-15 19:36:48,681 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 35 transitions, 231 flow [2021-10-15 19:36:48,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:36:48,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 19:36:48,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 88 transitions. [2021-10-15 19:36:48,682 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5028571428571429 [2021-10-15 19:36:48,682 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 88 transitions. [2021-10-15 19:36:48,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 88 transitions. [2021-10-15 19:36:48,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:36:48,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 88 transitions. [2021-10-15 19:36:48,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:48,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 25.0) internal successors, (200), 8 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:48,685 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 25.0) internal successors, (200), 8 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:48,685 INFO L186 Difference]: Start difference. First operand has 48 places, 29 transitions, 163 flow. Second operand 7 states and 88 transitions. [2021-10-15 19:36:48,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 35 transitions, 231 flow [2021-10-15 19:36:48,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 35 transitions, 217 flow, removed 1 selfloop flow, removed 6 redundant places. [2021-10-15 19:36:48,688 INFO L242 Difference]: Finished difference. Result has 50 places, 28 transitions, 155 flow [2021-10-15 19:36:48,688 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=155, PETRI_PLACES=50, PETRI_TRANSITIONS=28} [2021-10-15 19:36:48,688 INFO L334 CegarLoopForPetriNet]: 16 programPoint places, 34 predicate places. [2021-10-15 19:36:48,689 INFO L470 AbstractCegarLoop]: Abstraction has has 50 places, 28 transitions, 155 flow [2021-10-15 19:36:48,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:48,689 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:36:48,689 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2021-10-15 19:36:48,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-15 19:36:48,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-15 19:36:48,911 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:36:48,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:36:48,912 INFO L82 PathProgramCache]: Analyzing trace with hash -58338866, now seen corresponding path program 3 times [2021-10-15 19:36:48,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:36:48,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787894021] [2021-10-15 19:36:48,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:36:48,913 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:36:48,923 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:36:48,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1313378556] [2021-10-15 19:36:48,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:36:48,924 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:36:48,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:36:48,928 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:36:48,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-15 19:36:49,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-15 19:36:49,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:36:49,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-15 19:36:49,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:36:49,186 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-15 19:36:49,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:36:49,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787894021] [2021-10-15 19:36:49,196 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:36:49,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313378556] [2021-10-15 19:36:49,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313378556] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:36:49,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:36:49,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-15 19:36:49,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082962301] [2021-10-15 19:36:49,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:36:49,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:36:49,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:36:49,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:36:49,198 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 25 [2021-10-15 19:36:49,198 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 28 transitions, 155 flow. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:49,199 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:36:49,199 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 25 [2021-10-15 19:36:49,199 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:36:49,454 INFO L129 PetriNetUnfolder]: 3/30 cut-off events. [2021-10-15 19:36:49,455 INFO L130 PetriNetUnfolder]: For 59/59 co-relation queries the response was YES. [2021-10-15 19:36:49,455 INFO L84 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 30 events. 3/30 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 22 event pairs, 0 based on Foata normal form. 2/32 useless extension candidates. Maximal degree in co-relation 100. Up to 14 conditions per place. [2021-10-15 19:36:49,456 INFO L132 encePairwiseOnDemand]: 19/25 looper letters, 10 selfloop transitions, 4 changer transitions 2/24 dead transitions. [2021-10-15 19:36:49,456 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 24 transitions, 173 flow [2021-10-15 19:36:49,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:36:49,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:36:49,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 51 transitions. [2021-10-15 19:36:49,457 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.51 [2021-10-15 19:36:49,457 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 51 transitions. [2021-10-15 19:36:49,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 51 transitions. [2021-10-15 19:36:49,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:36:49,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 51 transitions. [2021-10-15 19:36:49,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:49,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:49,459 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:49,459 INFO L186 Difference]: Start difference. First operand has 50 places, 28 transitions, 155 flow. Second operand 4 states and 51 transitions. [2021-10-15 19:36:49,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 24 transitions, 173 flow [2021-10-15 19:36:49,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 24 transitions, 159 flow, removed 2 selfloop flow, removed 7 redundant places. [2021-10-15 19:36:49,462 INFO L242 Difference]: Finished difference. Result has 39 places, 22 transitions, 131 flow [2021-10-15 19:36:49,462 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=131, PETRI_PLACES=39, PETRI_TRANSITIONS=22} [2021-10-15 19:36:49,462 INFO L334 CegarLoopForPetriNet]: 16 programPoint places, 23 predicate places. [2021-10-15 19:36:49,463 INFO L470 AbstractCegarLoop]: Abstraction has has 39 places, 22 transitions, 131 flow [2021-10-15 19:36:49,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:49,463 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:36:49,463 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-10-15 19:36:49,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-15 19:36:49,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-15 19:36:49,676 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:36:49,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:36:49,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1808548489, now seen corresponding path program 3 times [2021-10-15 19:36:49,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:36:49,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686914004] [2021-10-15 19:36:49,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:36:49,677 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:36:49,686 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:36:49,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1520398218] [2021-10-15 19:36:49,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:36:49,686 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:36:49,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:36:49,693 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:36:49,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-15 19:36:49,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-15 19:36:49,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:36:49,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-15 19:36:49,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:36:49,879 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:36:49,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:36:49,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686914004] [2021-10-15 19:36:49,880 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:36:49,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520398218] [2021-10-15 19:36:49,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520398218] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:36:49,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:36:49,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-15 19:36:49,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119891910] [2021-10-15 19:36:49,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:36:49,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:36:49,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:36:49,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:36:49,882 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 25 [2021-10-15 19:36:49,883 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 22 transitions, 131 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:49,883 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:36:49,883 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 25 [2021-10-15 19:36:49,883 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:36:49,924 INFO L129 PetriNetUnfolder]: 2/26 cut-off events. [2021-10-15 19:36:49,924 INFO L130 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2021-10-15 19:36:49,924 INFO L84 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 26 events. 2/26 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 8 event pairs, 0 based on Foata normal form. 1/27 useless extension candidates. Maximal degree in co-relation 64. Up to 5 conditions per place. [2021-10-15 19:36:49,925 INFO L132 encePairwiseOnDemand]: 21/25 looper letters, 4 selfloop transitions, 9 changer transitions 0/22 dead transitions. [2021-10-15 19:36:49,925 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 22 transitions, 156 flow [2021-10-15 19:36:49,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-15 19:36:49,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-15 19:36:49,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2021-10-15 19:36:49,927 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.696 [2021-10-15 19:36:49,927 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 174 transitions. [2021-10-15 19:36:49,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 174 transitions. [2021-10-15 19:36:49,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:36:49,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 174 transitions. [2021-10-15 19:36:49,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 17.4) internal successors, (174), 10 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 19:36:49,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 25.0) internal successors, (275), 11 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:49,930 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 25.0) internal successors, (275), 11 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:49,930 INFO L186 Difference]: Start difference. First operand has 39 places, 22 transitions, 131 flow. Second operand 10 states and 174 transitions. [2021-10-15 19:36:49,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 22 transitions, 156 flow [2021-10-15 19:36:49,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 22 transitions, 150 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-10-15 19:36:49,933 INFO L242 Difference]: Finished difference. Result has 45 places, 22 transitions, 150 flow [2021-10-15 19:36:49,933 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=150, PETRI_PLACES=45, PETRI_TRANSITIONS=22} [2021-10-15 19:36:49,933 INFO L334 CegarLoopForPetriNet]: 16 programPoint places, 29 predicate places. [2021-10-15 19:36:49,933 INFO L470 AbstractCegarLoop]: Abstraction has has 45 places, 22 transitions, 150 flow [2021-10-15 19:36:49,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:49,934 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:36:49,934 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2021-10-15 19:36:49,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-15 19:36:50,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:36:50,148 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:36:50,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:36:50,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1493484688, now seen corresponding path program 3 times [2021-10-15 19:36:50,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:36:50,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58097597] [2021-10-15 19:36:50,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:36:50,149 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:36:50,159 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:36:50,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1981846641] [2021-10-15 19:36:50,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:36:50,160 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:36:50,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:36:50,169 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:36:50,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-15 19:36:50,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-15 19:36:50,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:36:50,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-15 19:36:50,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:36:50,648 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:36:50,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:36:50,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58097597] [2021-10-15 19:36:50,649 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:36:50,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981846641] [2021-10-15 19:36:50,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981846641] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:36:50,649 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:36:50,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-15 19:36:50,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699331721] [2021-10-15 19:36:50,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:36:50,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:36:50,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:36:50,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:36:50,652 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 25 [2021-10-15 19:36:50,652 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 22 transitions, 150 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:50,652 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:36:50,652 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 25 [2021-10-15 19:36:50,653 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:36:50,747 INFO L129 PetriNetUnfolder]: 2/30 cut-off events. [2021-10-15 19:36:50,747 INFO L130 PetriNetUnfolder]: For 57/57 co-relation queries the response was YES. [2021-10-15 19:36:50,747 INFO L84 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 30 events. 2/30 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 11 event pairs, 0 based on Foata normal form. 1/31 useless extension candidates. Maximal degree in co-relation 88. Up to 8 conditions per place. [2021-10-15 19:36:50,748 INFO L132 encePairwiseOnDemand]: 20/25 looper letters, 14 selfloop transitions, 5 changer transitions 3/30 dead transitions. [2021-10-15 19:36:50,748 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 30 transitions, 226 flow [2021-10-15 19:36:50,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 19:36:50,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-15 19:36:50,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 95 transitions. [2021-10-15 19:36:50,755 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.475 [2021-10-15 19:36:50,755 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 95 transitions. [2021-10-15 19:36:50,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 95 transitions. [2021-10-15 19:36:50,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:36:50,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 95 transitions. [2021-10-15 19:36:50,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:50,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 25.0) internal successors, (225), 9 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:50,757 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 25.0) internal successors, (225), 9 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:50,757 INFO L186 Difference]: Start difference. First operand has 45 places, 22 transitions, 150 flow. Second operand 8 states and 95 transitions. [2021-10-15 19:36:50,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 30 transitions, 226 flow [2021-10-15 19:36:50,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 30 transitions, 206 flow, removed 2 selfloop flow, removed 8 redundant places. [2021-10-15 19:36:50,760 INFO L242 Difference]: Finished difference. Result has 47 places, 23 transitions, 158 flow [2021-10-15 19:36:50,760 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=158, PETRI_PLACES=47, PETRI_TRANSITIONS=23} [2021-10-15 19:36:50,760 INFO L334 CegarLoopForPetriNet]: 16 programPoint places, 31 predicate places. [2021-10-15 19:36:50,760 INFO L470 AbstractCegarLoop]: Abstraction has has 47 places, 23 transitions, 158 flow [2021-10-15 19:36:50,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:50,761 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:36:50,761 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-10-15 19:36:50,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-15 19:36:50,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-15 19:36:50,967 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:36:50,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:36:50,967 INFO L82 PathProgramCache]: Analyzing trace with hash 754083403, now seen corresponding path program 4 times [2021-10-15 19:36:50,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:36:50,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388704918] [2021-10-15 19:36:50,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:36:50,968 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:36:50,977 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:36:50,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1635060658] [2021-10-15 19:36:50,988 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 19:36:50,988 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:36:50,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:36:50,989 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:36:51,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-15 19:36:51,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 19:36:51,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:36:51,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-15 19:36:51,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:36:51,255 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:36:51,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:36:51,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388704918] [2021-10-15 19:36:51,255 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:36:51,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635060658] [2021-10-15 19:36:51,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635060658] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:36:51,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:36:51,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-15 19:36:51,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819534209] [2021-10-15 19:36:51,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:36:51,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:36:51,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:36:51,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:36:51,258 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 25 [2021-10-15 19:36:51,258 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 23 transitions, 158 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:51,258 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:36:51,258 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 25 [2021-10-15 19:36:51,258 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:36:51,320 INFO L129 PetriNetUnfolder]: 2/30 cut-off events. [2021-10-15 19:36:51,320 INFO L130 PetriNetUnfolder]: For 84/84 co-relation queries the response was YES. [2021-10-15 19:36:51,320 INFO L84 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 30 events. 2/30 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 7 event pairs, 0 based on Foata normal form. 1/31 useless extension candidates. Maximal degree in co-relation 107. Up to 6 conditions per place. [2021-10-15 19:36:51,321 INFO L132 encePairwiseOnDemand]: 21/25 looper letters, 4 selfloop transitions, 11 changer transitions 0/25 dead transitions. [2021-10-15 19:36:51,321 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 25 transitions, 204 flow [2021-10-15 19:36:51,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-15 19:36:51,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-15 19:36:51,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 208 transitions. [2021-10-15 19:36:51,323 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6933333333333334 [2021-10-15 19:36:51,323 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 208 transitions. [2021-10-15 19:36:51,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 208 transitions. [2021-10-15 19:36:51,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:36:51,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 208 transitions. [2021-10-15 19:36:51,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 17.333333333333332) internal successors, (208), 12 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:51,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 25.0) internal successors, (325), 13 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:51,326 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 25.0) internal successors, (325), 13 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:51,326 INFO L186 Difference]: Start difference. First operand has 47 places, 23 transitions, 158 flow. Second operand 12 states and 208 transitions. [2021-10-15 19:36:51,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 25 transitions, 204 flow [2021-10-15 19:36:51,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 25 transitions, 186 flow, removed 5 selfloop flow, removed 6 redundant places. [2021-10-15 19:36:51,332 INFO L242 Difference]: Finished difference. Result has 52 places, 25 transitions, 188 flow [2021-10-15 19:36:51,333 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=188, PETRI_PLACES=52, PETRI_TRANSITIONS=25} [2021-10-15 19:36:51,333 INFO L334 CegarLoopForPetriNet]: 16 programPoint places, 36 predicate places. [2021-10-15 19:36:51,333 INFO L470 AbstractCegarLoop]: Abstraction has has 52 places, 25 transitions, 188 flow [2021-10-15 19:36:51,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:51,334 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:36:51,334 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1] [2021-10-15 19:36:51,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-15 19:36:51,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:36:51,548 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:36:51,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:36:51,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1128495004, now seen corresponding path program 4 times [2021-10-15 19:36:51,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:36:51,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900485225] [2021-10-15 19:36:51,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:36:51,549 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:36:51,558 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:36:51,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1575265981] [2021-10-15 19:36:51,559 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 19:36:51,559 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:36:51,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:36:51,560 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:36:51,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-15 19:36:51,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 19:36:51,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:36:51,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-15 19:36:51,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:36:51,980 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:36:51,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:36:51,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900485225] [2021-10-15 19:36:51,981 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:36:51,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575265981] [2021-10-15 19:36:51,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575265981] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:36:51,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:36:51,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-15 19:36:51,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339574988] [2021-10-15 19:36:51,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 19:36:51,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:36:51,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 19:36:51,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-10-15 19:36:51,983 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 25 [2021-10-15 19:36:51,983 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 25 transitions, 188 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 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 19:36:51,983 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:36:51,984 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 25 [2021-10-15 19:36:51,984 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:36:52,103 INFO L129 PetriNetUnfolder]: 2/34 cut-off events. [2021-10-15 19:36:52,104 INFO L130 PetriNetUnfolder]: For 95/95 co-relation queries the response was YES. [2021-10-15 19:36:52,104 INFO L84 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 34 events. 2/34 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 11 event pairs, 0 based on Foata normal form. 1/35 useless extension candidates. Maximal degree in co-relation 113. Up to 8 conditions per place. [2021-10-15 19:36:52,104 INFO L132 encePairwiseOnDemand]: 20/25 looper letters, 16 selfloop transitions, 6 changer transitions 3/34 dead transitions. [2021-10-15 19:36:52,105 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 34 transitions, 278 flow [2021-10-15 19:36:52,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 19:36:52,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-15 19:36:52,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 107 transitions. [2021-10-15 19:36:52,106 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.47555555555555556 [2021-10-15 19:36:52,106 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 107 transitions. [2021-10-15 19:36:52,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 107 transitions. [2021-10-15 19:36:52,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:36:52,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 107 transitions. [2021-10-15 19:36:52,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:52,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 25.0) internal successors, (250), 10 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:52,108 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 25.0) internal successors, (250), 10 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:52,108 INFO L186 Difference]: Start difference. First operand has 52 places, 25 transitions, 188 flow. Second operand 9 states and 107 transitions. [2021-10-15 19:36:52,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 34 transitions, 278 flow [2021-10-15 19:36:52,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 34 transitions, 248 flow, removed 6 selfloop flow, removed 9 redundant places. [2021-10-15 19:36:52,112 INFO L242 Difference]: Finished difference. Result has 54 places, 26 transitions, 190 flow [2021-10-15 19:36:52,112 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=190, PETRI_PLACES=54, PETRI_TRANSITIONS=26} [2021-10-15 19:36:52,112 INFO L334 CegarLoopForPetriNet]: 16 programPoint places, 38 predicate places. [2021-10-15 19:36:52,112 INFO L470 AbstractCegarLoop]: Abstraction has has 54 places, 26 transitions, 190 flow [2021-10-15 19:36:52,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 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 19:36:52,112 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:36:52,113 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2021-10-15 19:36:52,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-15 19:36:52,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:36:52,329 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:36:52,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:36:52,330 INFO L82 PathProgramCache]: Analyzing trace with hash -2117565153, now seen corresponding path program 5 times [2021-10-15 19:36:52,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:36:52,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116304905] [2021-10-15 19:36:52,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:36:52,330 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:36:52,339 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:36:52,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [3369009] [2021-10-15 19:36:52,339 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-15 19:36:52,339 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:36:52,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:36:52,340 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:36:52,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-15 19:36:52,574 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-15 19:36:52,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:36:52,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-15 19:36:52,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:36:52,709 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:36:52,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:36:52,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116304905] [2021-10-15 19:36:52,709 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:36:52,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3369009] [2021-10-15 19:36:52,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3369009] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:36:52,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:36:52,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-15 19:36:52,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582437215] [2021-10-15 19:36:52,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 19:36:52,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:36:52,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 19:36:52,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-15 19:36:52,714 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 25 [2021-10-15 19:36:52,714 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 26 transitions, 190 flow. Second operand has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 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 19:36:52,714 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:36:52,715 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 25 [2021-10-15 19:36:52,715 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:36:52,787 INFO L129 PetriNetUnfolder]: 2/34 cut-off events. [2021-10-15 19:36:52,787 INFO L130 PetriNetUnfolder]: For 126/126 co-relation queries the response was YES. [2021-10-15 19:36:52,787 INFO L84 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 34 events. 2/34 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 8 event pairs, 0 based on Foata normal form. 1/35 useless extension candidates. Maximal degree in co-relation 129. Up to 7 conditions per place. [2021-10-15 19:36:52,788 INFO L132 encePairwiseOnDemand]: 21/25 looper letters, 4 selfloop transitions, 13 changer transitions 0/28 dead transitions. [2021-10-15 19:36:52,788 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 28 transitions, 244 flow [2021-10-15 19:36:52,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-15 19:36:52,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-15 19:36:52,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 242 transitions. [2021-10-15 19:36:52,791 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6914285714285714 [2021-10-15 19:36:52,791 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 242 transitions. [2021-10-15 19:36:52,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 242 transitions. [2021-10-15 19:36:52,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:36:52,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 242 transitions. [2021-10-15 19:36:52,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 17.285714285714285) internal successors, (242), 14 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 19:36:52,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 25.0) internal successors, (375), 15 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:52,800 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 25.0) internal successors, (375), 15 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:52,800 INFO L186 Difference]: Start difference. First operand has 54 places, 26 transitions, 190 flow. Second operand 14 states and 242 transitions. [2021-10-15 19:36:52,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 28 transitions, 244 flow [2021-10-15 19:36:52,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 28 transitions, 222 flow, removed 6 selfloop flow, removed 7 redundant places. [2021-10-15 19:36:52,804 INFO L242 Difference]: Finished difference. Result has 60 places, 28 transitions, 224 flow [2021-10-15 19:36:52,805 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=224, PETRI_PLACES=60, PETRI_TRANSITIONS=28} [2021-10-15 19:36:52,805 INFO L334 CegarLoopForPetriNet]: 16 programPoint places, 44 predicate places. [2021-10-15 19:36:52,805 INFO L470 AbstractCegarLoop]: Abstraction has has 60 places, 28 transitions, 224 flow [2021-10-15 19:36:52,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 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 19:36:52,806 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:36:52,806 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1] [2021-10-15 19:36:52,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-15 19:36:53,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-15 19:36:53,012 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:36:53,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:36:53,012 INFO L82 PathProgramCache]: Analyzing trace with hash 881214008, now seen corresponding path program 5 times [2021-10-15 19:36:53,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:36:53,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000671605] [2021-10-15 19:36:53,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:36:53,013 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:36:53,036 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:36:53,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1721454060] [2021-10-15 19:36:53,041 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-15 19:36:53,041 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:36:53,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:36:53,043 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:36:53,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-15 19:36:53,364 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-15 19:36:53,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:36:53,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-15 19:36:53,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:36:53,680 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:36:53,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:36:53,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000671605] [2021-10-15 19:36:53,681 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:36:53,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721454060] [2021-10-15 19:36:53,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721454060] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:36:53,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:36:53,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-15 19:36:53,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451428990] [2021-10-15 19:36:53,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-15 19:36:53,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:36:53,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-15 19:36:53,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-10-15 19:36:53,684 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 25 [2021-10-15 19:36:53,684 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 28 transitions, 224 flow. Second operand has 10 states, 10 states have (on average 11.1) internal successors, (111), 10 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:53,684 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:36:53,685 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 25 [2021-10-15 19:36:53,685 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:36:53,836 INFO L129 PetriNetUnfolder]: 2/38 cut-off events. [2021-10-15 19:36:53,836 INFO L130 PetriNetUnfolder]: For 140/140 co-relation queries the response was YES. [2021-10-15 19:36:53,836 INFO L84 FinitePrefix]: Finished finitePrefix Result has 189 conditions, 38 events. 2/38 cut-off events. For 140/140 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 12 event pairs, 0 based on Foata normal form. 1/39 useless extension candidates. Maximal degree in co-relation 137. Up to 8 conditions per place. [2021-10-15 19:36:53,837 INFO L132 encePairwiseOnDemand]: 20/25 looper letters, 18 selfloop transitions, 7 changer transitions 3/38 dead transitions. [2021-10-15 19:36:53,837 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 38 transitions, 328 flow [2021-10-15 19:36:53,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-15 19:36:53,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-15 19:36:53,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2021-10-15 19:36:53,840 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.476 [2021-10-15 19:36:53,840 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 119 transitions. [2021-10-15 19:36:53,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 119 transitions. [2021-10-15 19:36:53,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:36:53,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 119 transitions. [2021-10-15 19:36:53,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:53,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 25.0) internal successors, (275), 11 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:53,842 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 25.0) internal successors, (275), 11 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:53,842 INFO L186 Difference]: Start difference. First operand has 60 places, 28 transitions, 224 flow. Second operand 10 states and 119 transitions. [2021-10-15 19:36:53,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 38 transitions, 328 flow [2021-10-15 19:36:53,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 38 transitions, 290 flow, removed 8 selfloop flow, removed 11 redundant places. [2021-10-15 19:36:53,846 INFO L242 Difference]: Finished difference. Result has 61 places, 29 transitions, 222 flow [2021-10-15 19:36:53,846 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=222, PETRI_PLACES=61, PETRI_TRANSITIONS=29} [2021-10-15 19:36:53,847 INFO L334 CegarLoopForPetriNet]: 16 programPoint places, 45 predicate places. [2021-10-15 19:36:53,847 INFO L470 AbstractCegarLoop]: Abstraction has has 61 places, 29 transitions, 222 flow [2021-10-15 19:36:53,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.1) internal successors, (111), 10 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:53,847 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:36:53,847 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2021-10-15 19:36:53,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-10-15 19:36:54,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-15 19:36:54,053 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:36:54,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:36:54,054 INFO L82 PathProgramCache]: Analyzing trace with hash 772479475, now seen corresponding path program 6 times [2021-10-15 19:36:54,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:36:54,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511597522] [2021-10-15 19:36:54,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:36:54,054 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:36:54,073 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:36:54,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1059215370] [2021-10-15 19:36:54,073 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-15 19:36:54,074 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:36:54,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:36:54,074 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:36:54,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-15 19:36:54,351 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-10-15 19:36:54,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:36:54,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-15 19:36:54,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:36:54,509 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:36:54,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:36:54,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511597522] [2021-10-15 19:36:54,510 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:36:54,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059215370] [2021-10-15 19:36:54,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059215370] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:36:54,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:36:54,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-15 19:36:54,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126989515] [2021-10-15 19:36:54,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-15 19:36:54,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:36:54,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-15 19:36:54,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-15 19:36:54,512 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 25 [2021-10-15 19:36:54,513 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 29 transitions, 222 flow. Second operand has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:54,513 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:36:54,513 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 25 [2021-10-15 19:36:54,513 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:36:54,625 INFO L129 PetriNetUnfolder]: 2/38 cut-off events. [2021-10-15 19:36:54,625 INFO L130 PetriNetUnfolder]: For 178/178 co-relation queries the response was YES. [2021-10-15 19:36:54,627 INFO L84 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 38 events. 2/38 cut-off events. For 178/178 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 8 event pairs, 0 based on Foata normal form. 1/39 useless extension candidates. Maximal degree in co-relation 151. Up to 8 conditions per place. [2021-10-15 19:36:54,628 INFO L132 encePairwiseOnDemand]: 21/25 looper letters, 4 selfloop transitions, 15 changer transitions 0/31 dead transitions. [2021-10-15 19:36:54,628 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 31 transitions, 284 flow [2021-10-15 19:36:54,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-15 19:36:54,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-15 19:36:54,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 276 transitions. [2021-10-15 19:36:54,633 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.69 [2021-10-15 19:36:54,633 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 276 transitions. [2021-10-15 19:36:54,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 276 transitions. [2021-10-15 19:36:54,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:36:54,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 276 transitions. [2021-10-15 19:36:54,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 17.25) internal successors, (276), 16 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:54,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 25.0) internal successors, (425), 17 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:54,641 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 25.0) internal successors, (425), 17 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:54,641 INFO L186 Difference]: Start difference. First operand has 61 places, 29 transitions, 222 flow. Second operand 16 states and 276 transitions. [2021-10-15 19:36:54,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 31 transitions, 284 flow [2021-10-15 19:36:54,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 31 transitions, 258 flow, removed 7 selfloop flow, removed 8 redundant places. [2021-10-15 19:36:54,646 INFO L242 Difference]: Finished difference. Result has 68 places, 31 transitions, 260 flow [2021-10-15 19:36:54,647 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=260, PETRI_PLACES=68, PETRI_TRANSITIONS=31} [2021-10-15 19:36:54,647 INFO L334 CegarLoopForPetriNet]: 16 programPoint places, 52 predicate places. [2021-10-15 19:36:54,647 INFO L470 AbstractCegarLoop]: Abstraction has has 68 places, 31 transitions, 260 flow [2021-10-15 19:36:54,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:54,647 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:36:54,648 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 6, 1, 1, 1, 1, 1, 1] [2021-10-15 19:36:54,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-15 19:36:54,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-15 19:36:54,853 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:36:54,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:36:54,854 INFO L82 PathProgramCache]: Analyzing trace with hash -629738996, now seen corresponding path program 6 times [2021-10-15 19:36:54,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:36:54,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117050627] [2021-10-15 19:36:54,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:36:54,854 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:36:54,877 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:36:54,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1737629841] [2021-10-15 19:36:54,877 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-15 19:36:54,877 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:36:54,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:36:54,883 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:36:54,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-15 19:36:55,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-10-15 19:36:55,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:36:55,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-15 19:36:55,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:36:55,911 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:36:55,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:36:55,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117050627] [2021-10-15 19:36:55,912 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:36:55,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737629841] [2021-10-15 19:36:55,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737629841] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:36:55,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:36:55,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-15 19:36:55,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032218896] [2021-10-15 19:36:55,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-15 19:36:55,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:36:55,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-15 19:36:55,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-10-15 19:36:55,915 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 25 [2021-10-15 19:36:55,915 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 31 transitions, 260 flow. Second operand has 11 states, 11 states have (on average 11.181818181818182) internal successors, (123), 11 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:55,915 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:36:55,915 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 25 [2021-10-15 19:36:55,916 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:36:56,197 INFO L129 PetriNetUnfolder]: 2/42 cut-off events. [2021-10-15 19:36:56,197 INFO L130 PetriNetUnfolder]: For 195/195 co-relation queries the response was YES. [2021-10-15 19:36:56,197 INFO L84 FinitePrefix]: Finished finitePrefix Result has 217 conditions, 42 events. 2/42 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 13 event pairs, 0 based on Foata normal form. 1/43 useless extension candidates. Maximal degree in co-relation 161. Up to 9 conditions per place. [2021-10-15 19:36:56,198 INFO L132 encePairwiseOnDemand]: 20/25 looper letters, 20 selfloop transitions, 8 changer transitions 3/42 dead transitions. [2021-10-15 19:36:56,198 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 42 transitions, 378 flow [2021-10-15 19:36:56,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-15 19:36:56,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-15 19:36:56,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 131 transitions. [2021-10-15 19:36:56,200 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4763636363636364 [2021-10-15 19:36:56,200 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 131 transitions. [2021-10-15 19:36:56,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 131 transitions. [2021-10-15 19:36:56,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:36:56,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 131 transitions. [2021-10-15 19:36:56,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 11.909090909090908) internal successors, (131), 11 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:56,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 25.0) internal successors, (300), 12 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:56,202 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 25.0) internal successors, (300), 12 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:56,202 INFO L186 Difference]: Start difference. First operand has 68 places, 31 transitions, 260 flow. Second operand 11 states and 131 transitions. [2021-10-15 19:36:56,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 42 transitions, 378 flow [2021-10-15 19:36:56,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 42 transitions, 332 flow, removed 10 selfloop flow, removed 13 redundant places. [2021-10-15 19:36:56,208 INFO L242 Difference]: Finished difference. Result has 68 places, 32 transitions, 254 flow [2021-10-15 19:36:56,208 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=254, PETRI_PLACES=68, PETRI_TRANSITIONS=32} [2021-10-15 19:36:56,208 INFO L334 CegarLoopForPetriNet]: 16 programPoint places, 52 predicate places. [2021-10-15 19:36:56,208 INFO L470 AbstractCegarLoop]: Abstraction has has 68 places, 32 transitions, 254 flow [2021-10-15 19:36:56,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.181818181818182) internal successors, (123), 11 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:56,209 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:36:56,209 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2021-10-15 19:36:56,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-10-15 19:36:56,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-15 19:36:56,416 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:36:56,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:36:56,416 INFO L82 PathProgramCache]: Analyzing trace with hash 445588679, now seen corresponding path program 7 times [2021-10-15 19:36:56,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:36:56,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606480633] [2021-10-15 19:36:56,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:36:56,417 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:36:56,432 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:36:56,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1536516138] [2021-10-15 19:36:56,432 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-15 19:36:56,433 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:36:56,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:36:56,434 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:36:56,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-15 19:36:56,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:36:56,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-15 19:36:56,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:36:56,778 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:36:56,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:36:56,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606480633] [2021-10-15 19:36:56,778 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:36:56,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536516138] [2021-10-15 19:36:56,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536516138] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:36:56,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:36:56,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-15 19:36:56,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756015368] [2021-10-15 19:36:56,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-15 19:36:56,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:36:56,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-15 19:36:56,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-10-15 19:36:56,781 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 25 [2021-10-15 19:36:56,782 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 32 transitions, 254 flow. Second operand has 11 states, 11 states have (on average 17.636363636363637) internal successors, (194), 11 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:56,782 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:36:56,782 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 25 [2021-10-15 19:36:56,782 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:36:56,878 INFO L129 PetriNetUnfolder]: 2/42 cut-off events. [2021-10-15 19:36:56,878 INFO L130 PetriNetUnfolder]: For 240/240 co-relation queries the response was YES. [2021-10-15 19:36:56,879 INFO L84 FinitePrefix]: Finished finitePrefix Result has 207 conditions, 42 events. 2/42 cut-off events. For 240/240 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 7 event pairs, 0 based on Foata normal form. 1/43 useless extension candidates. Maximal degree in co-relation 173. Up to 9 conditions per place. [2021-10-15 19:36:56,879 INFO L132 encePairwiseOnDemand]: 21/25 looper letters, 4 selfloop transitions, 17 changer transitions 0/34 dead transitions. [2021-10-15 19:36:56,879 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 34 transitions, 324 flow [2021-10-15 19:36:56,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-15 19:36:56,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-10-15 19:36:56,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 310 transitions. [2021-10-15 19:36:56,881 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6888888888888889 [2021-10-15 19:36:56,881 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 310 transitions. [2021-10-15 19:36:56,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 310 transitions. [2021-10-15 19:36:56,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:36:56,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 310 transitions. [2021-10-15 19:36:56,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 17.22222222222222) internal successors, (310), 18 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:56,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 25.0) internal successors, (475), 19 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:56,895 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 25.0) internal successors, (475), 19 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:56,896 INFO L186 Difference]: Start difference. First operand has 68 places, 32 transitions, 254 flow. Second operand 18 states and 310 transitions. [2021-10-15 19:36:56,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 34 transitions, 324 flow [2021-10-15 19:36:56,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 34 transitions, 294 flow, removed 8 selfloop flow, removed 9 redundant places. [2021-10-15 19:36:56,901 INFO L242 Difference]: Finished difference. Result has 76 places, 34 transitions, 296 flow [2021-10-15 19:36:56,901 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=296, PETRI_PLACES=76, PETRI_TRANSITIONS=34} [2021-10-15 19:36:56,902 INFO L334 CegarLoopForPetriNet]: 16 programPoint places, 60 predicate places. [2021-10-15 19:36:56,902 INFO L470 AbstractCegarLoop]: Abstraction has has 76 places, 34 transitions, 296 flow [2021-10-15 19:36:56,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 17.636363636363637) internal successors, (194), 11 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:56,902 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:36:56,902 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 7, 1, 1, 1, 1, 1, 1] [2021-10-15 19:36:56,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-15 19:36:57,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-15 19:36:57,116 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:36:57,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:36:57,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1239181344, now seen corresponding path program 7 times [2021-10-15 19:36:57,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:36:57,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038888647] [2021-10-15 19:36:57,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:36:57,117 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:36:57,124 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:36:57,124 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [233023692] [2021-10-15 19:36:57,125 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-15 19:36:57,125 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:36:57,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:36:57,128 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:36:57,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-15 19:36:57,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:36:57,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-15 19:36:57,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:36:58,015 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:36:58,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:36:58,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038888647] [2021-10-15 19:36:58,016 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:36:58,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233023692] [2021-10-15 19:36:58,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233023692] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:36:58,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:36:58,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-15 19:36:58,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320278950] [2021-10-15 19:36:58,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-15 19:36:58,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:36:58,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-15 19:36:58,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-10-15 19:36:58,018 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 25 [2021-10-15 19:36:58,019 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 34 transitions, 296 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:58,019 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:36:58,019 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 25 [2021-10-15 19:36:58,019 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:36:58,366 INFO L129 PetriNetUnfolder]: 2/46 cut-off events. [2021-10-15 19:36:58,366 INFO L130 PetriNetUnfolder]: For 260/260 co-relation queries the response was YES. [2021-10-15 19:36:58,367 INFO L84 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 46 events. 2/46 cut-off events. For 260/260 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 12 event pairs, 0 based on Foata normal form. 1/47 useless extension candidates. Maximal degree in co-relation 185. Up to 10 conditions per place. [2021-10-15 19:36:58,367 INFO L132 encePairwiseOnDemand]: 20/25 looper letters, 22 selfloop transitions, 9 changer transitions 3/46 dead transitions. [2021-10-15 19:36:58,367 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 46 transitions, 428 flow [2021-10-15 19:36:58,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-15 19:36:58,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-15 19:36:58,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 143 transitions. [2021-10-15 19:36:58,368 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4766666666666667 [2021-10-15 19:36:58,368 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 143 transitions. [2021-10-15 19:36:58,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 143 transitions. [2021-10-15 19:36:58,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:36:58,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 143 transitions. [2021-10-15 19:36:58,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 11.916666666666666) internal successors, (143), 12 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:58,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 25.0) internal successors, (325), 13 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:58,370 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 25.0) internal successors, (325), 13 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:58,371 INFO L186 Difference]: Start difference. First operand has 76 places, 34 transitions, 296 flow. Second operand 12 states and 143 transitions. [2021-10-15 19:36:58,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 46 transitions, 428 flow [2021-10-15 19:36:58,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 46 transitions, 374 flow, removed 12 selfloop flow, removed 15 redundant places. [2021-10-15 19:36:58,376 INFO L242 Difference]: Finished difference. Result has 75 places, 35 transitions, 286 flow [2021-10-15 19:36:58,377 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=286, PETRI_PLACES=75, PETRI_TRANSITIONS=35} [2021-10-15 19:36:58,377 INFO L334 CegarLoopForPetriNet]: 16 programPoint places, 59 predicate places. [2021-10-15 19:36:58,377 INFO L470 AbstractCegarLoop]: Abstraction has has 75 places, 35 transitions, 286 flow [2021-10-15 19:36:58,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:58,377 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:36:58,377 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2021-10-15 19:36:58,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-15 19:36:58,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-15 19:36:58,578 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:36:58,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:36:58,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1112955493, now seen corresponding path program 8 times [2021-10-15 19:36:58,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:36:58,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392496786] [2021-10-15 19:36:58,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:36:58,579 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:36:58,586 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:36:58,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1150966293] [2021-10-15 19:36:58,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:36:58,587 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:36:58,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:36:58,588 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:36:58,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-15 19:36:58,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:36:58,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:36:58,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-15 19:36:58,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:36:59,023 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:36:59,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:36:59,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392496786] [2021-10-15 19:36:59,023 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:36:59,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150966293] [2021-10-15 19:36:59,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150966293] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:36:59,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:36:59,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-15 19:36:59,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981910024] [2021-10-15 19:36:59,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-15 19:36:59,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:36:59,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-15 19:36:59,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-10-15 19:36:59,026 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 25 [2021-10-15 19:36:59,027 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 35 transitions, 286 flow. Second operand has 12 states, 12 states have (on average 17.666666666666668) internal successors, (212), 12 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:59,027 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:36:59,027 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 25 [2021-10-15 19:36:59,027 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:36:59,131 INFO L129 PetriNetUnfolder]: 2/46 cut-off events. [2021-10-15 19:36:59,132 INFO L130 PetriNetUnfolder]: For 312/312 co-relation queries the response was YES. [2021-10-15 19:36:59,132 INFO L84 FinitePrefix]: Finished finitePrefix Result has 232 conditions, 46 events. 2/46 cut-off events. For 312/312 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 8 event pairs, 0 based on Foata normal form. 1/47 useless extension candidates. Maximal degree in co-relation 195. Up to 10 conditions per place. [2021-10-15 19:36:59,132 INFO L132 encePairwiseOnDemand]: 21/25 looper letters, 4 selfloop transitions, 19 changer transitions 0/37 dead transitions. [2021-10-15 19:36:59,132 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 37 transitions, 364 flow [2021-10-15 19:36:59,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-15 19:36:59,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-15 19:36:59,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 344 transitions. [2021-10-15 19:36:59,133 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.688 [2021-10-15 19:36:59,133 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 344 transitions. [2021-10-15 19:36:59,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 344 transitions. [2021-10-15 19:36:59,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:36:59,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 344 transitions. [2021-10-15 19:36:59,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 17.2) internal successors, (344), 20 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:59,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 25.0) internal successors, (525), 21 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:59,139 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 25.0) internal successors, (525), 21 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:59,139 INFO L186 Difference]: Start difference. First operand has 75 places, 35 transitions, 286 flow. Second operand 20 states and 344 transitions. [2021-10-15 19:36:59,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 37 transitions, 364 flow [2021-10-15 19:36:59,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 37 transitions, 330 flow, removed 9 selfloop flow, removed 10 redundant places. [2021-10-15 19:36:59,146 INFO L242 Difference]: Finished difference. Result has 84 places, 37 transitions, 332 flow [2021-10-15 19:36:59,146 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=332, PETRI_PLACES=84, PETRI_TRANSITIONS=37} [2021-10-15 19:36:59,148 INFO L334 CegarLoopForPetriNet]: 16 programPoint places, 68 predicate places. [2021-10-15 19:36:59,148 INFO L470 AbstractCegarLoop]: Abstraction has has 84 places, 37 transitions, 332 flow [2021-10-15 19:36:59,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 17.666666666666668) internal successors, (212), 12 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:36:59,149 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:36:59,149 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 8, 1, 1, 1, 1, 1, 1] [2021-10-15 19:36:59,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-15 19:36:59,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:36:59,376 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:36:59,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:36:59,376 INFO L82 PathProgramCache]: Analyzing trace with hash -56544332, now seen corresponding path program 8 times [2021-10-15 19:36:59,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:36:59,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453634410] [2021-10-15 19:36:59,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:36:59,377 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:36:59,384 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:36:59,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1332612936] [2021-10-15 19:36:59,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:36:59,385 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:36:59,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:36:59,389 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:36:59,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-15 19:37:00,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:37:00,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:37:00,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-15 19:37:00,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:37:00,637 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:37:00,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:37:00,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453634410] [2021-10-15 19:37:00,638 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:37:00,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332612936] [2021-10-15 19:37:00,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332612936] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:37:00,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:37:00,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-10-15 19:37:00,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778694658] [2021-10-15 19:37:00,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-15 19:37:00,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:37:00,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-15 19:37:00,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-10-15 19:37:00,640 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 25 [2021-10-15 19:37:00,640 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 37 transitions, 332 flow. Second operand has 13 states, 13 states have (on average 11.307692307692308) internal successors, (147), 13 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 19:37:00,640 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:37:00,640 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 25 [2021-10-15 19:37:00,640 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:37:00,994 INFO L129 PetriNetUnfolder]: 2/50 cut-off events. [2021-10-15 19:37:00,994 INFO L130 PetriNetUnfolder]: For 335/335 co-relation queries the response was YES. [2021-10-15 19:37:00,995 INFO L84 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 50 events. 2/50 cut-off events. For 335/335 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 12 event pairs, 0 based on Foata normal form. 1/51 useless extension candidates. Maximal degree in co-relation 209. Up to 11 conditions per place. [2021-10-15 19:37:00,996 INFO L132 encePairwiseOnDemand]: 20/25 looper letters, 24 selfloop transitions, 10 changer transitions 3/50 dead transitions. [2021-10-15 19:37:00,996 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 50 transitions, 478 flow [2021-10-15 19:37:00,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-15 19:37:00,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-15 19:37:00,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 155 transitions. [2021-10-15 19:37:00,997 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.47692307692307695 [2021-10-15 19:37:00,997 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 155 transitions. [2021-10-15 19:37:00,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 155 transitions. [2021-10-15 19:37:00,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:37:00,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 155 transitions. [2021-10-15 19:37:00,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 11.923076923076923) internal successors, (155), 13 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:37:01,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 25.0) internal successors, (350), 14 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:37:01,000 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 25.0) internal successors, (350), 14 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:37:01,000 INFO L186 Difference]: Start difference. First operand has 84 places, 37 transitions, 332 flow. Second operand 13 states and 155 transitions. [2021-10-15 19:37:01,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 50 transitions, 478 flow [2021-10-15 19:37:01,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 50 transitions, 416 flow, removed 14 selfloop flow, removed 17 redundant places. [2021-10-15 19:37:01,016 INFO L242 Difference]: Finished difference. Result has 82 places, 38 transitions, 318 flow [2021-10-15 19:37:01,016 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=318, PETRI_PLACES=82, PETRI_TRANSITIONS=38} [2021-10-15 19:37:01,017 INFO L334 CegarLoopForPetriNet]: 16 programPoint places, 66 predicate places. [2021-10-15 19:37:01,017 INFO L470 AbstractCegarLoop]: Abstraction has has 82 places, 38 transitions, 318 flow [2021-10-15 19:37:01,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.307692307692308) internal successors, (147), 13 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 19:37:01,017 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:37:01,017 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2021-10-15 19:37:01,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-15 19:37:01,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:37:01,218 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:37:01,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:37:01,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1529846895, now seen corresponding path program 9 times [2021-10-15 19:37:01,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:37:01,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430488803] [2021-10-15 19:37:01,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:37:01,218 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:37:01,224 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:37:01,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [397705286] [2021-10-15 19:37:01,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:37:01,225 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:37:01,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:37:01,226 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:37:01,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-15 19:37:01,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-10-15 19:37:01,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:37:01,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-15 19:37:01,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:37:01,731 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:37:01,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:37:01,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430488803] [2021-10-15 19:37:01,732 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:37:01,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397705286] [2021-10-15 19:37:01,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397705286] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:37:01,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:37:01,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-15 19:37:01,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068193164] [2021-10-15 19:37:01,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-15 19:37:01,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:37:01,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-15 19:37:01,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-10-15 19:37:01,734 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 25 [2021-10-15 19:37:01,735 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 38 transitions, 318 flow. Second operand has 13 states, 13 states have (on average 17.692307692307693) internal successors, (230), 13 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:37:01,735 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:37:01,735 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 25 [2021-10-15 19:37:01,735 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:37:01,856 INFO L129 PetriNetUnfolder]: 2/50 cut-off events. [2021-10-15 19:37:01,856 INFO L130 PetriNetUnfolder]: For 394/394 co-relation queries the response was YES. [2021-10-15 19:37:01,856 INFO L84 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 50 events. 2/50 cut-off events. For 394/394 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 8 event pairs, 0 based on Foata normal form. 1/51 useless extension candidates. Maximal degree in co-relation 217. Up to 11 conditions per place. [2021-10-15 19:37:01,857 INFO L132 encePairwiseOnDemand]: 21/25 looper letters, 4 selfloop transitions, 21 changer transitions 0/40 dead transitions. [2021-10-15 19:37:01,857 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 40 transitions, 404 flow [2021-10-15 19:37:01,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-15 19:37:01,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-15 19:37:01,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 378 transitions. [2021-10-15 19:37:01,859 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6872727272727273 [2021-10-15 19:37:01,859 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 378 transitions. [2021-10-15 19:37:01,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 378 transitions. [2021-10-15 19:37:01,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:37:01,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 378 transitions. [2021-10-15 19:37:01,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 17.181818181818183) internal successors, (378), 22 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:37:01,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 25.0) internal successors, (575), 23 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:37:01,870 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 25.0) internal successors, (575), 23 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:37:01,870 INFO L186 Difference]: Start difference. First operand has 82 places, 38 transitions, 318 flow. Second operand 22 states and 378 transitions. [2021-10-15 19:37:01,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 40 transitions, 404 flow [2021-10-15 19:37:01,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 40 transitions, 366 flow, removed 10 selfloop flow, removed 11 redundant places. [2021-10-15 19:37:01,877 INFO L242 Difference]: Finished difference. Result has 92 places, 40 transitions, 368 flow [2021-10-15 19:37:01,877 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=368, PETRI_PLACES=92, PETRI_TRANSITIONS=40} [2021-10-15 19:37:01,877 INFO L334 CegarLoopForPetriNet]: 16 programPoint places, 76 predicate places. [2021-10-15 19:37:01,878 INFO L470 AbstractCegarLoop]: Abstraction has has 92 places, 40 transitions, 368 flow [2021-10-15 19:37:01,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 17.692307692307693) internal successors, (230), 13 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:37:01,878 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:37:01,878 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 9, 1, 1, 1, 1, 1, 1] [2021-10-15 19:37:01,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-15 19:37:02,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:37:02,092 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:37:02,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:37:02,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1350878600, now seen corresponding path program 9 times [2021-10-15 19:37:02,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:37:02,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019478951] [2021-10-15 19:37:02,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:37:02,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:37:02,099 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:37:02,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2144212651] [2021-10-15 19:37:02,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:37:02,100 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:37:02,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:37:02,101 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:37:02,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-15 19:37:03,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-10-15 19:37:03,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:37:03,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-15 19:37:03,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:37:03,523 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:37:03,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:37:03,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019478951] [2021-10-15 19:37:03,523 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:37:03,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144212651] [2021-10-15 19:37:03,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144212651] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:37:03,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:37:03,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-10-15 19:37:03,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044539965] [2021-10-15 19:37:03,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-15 19:37:03,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:37:03,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-15 19:37:03,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-10-15 19:37:03,524 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 25 [2021-10-15 19:37:03,525 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 40 transitions, 368 flow. Second operand has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 14 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:37:03,525 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:37:03,525 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 25 [2021-10-15 19:37:03,525 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:37:03,802 INFO L129 PetriNetUnfolder]: 2/54 cut-off events. [2021-10-15 19:37:03,802 INFO L130 PetriNetUnfolder]: For 420/420 co-relation queries the response was YES. [2021-10-15 19:37:03,802 INFO L84 FinitePrefix]: Finished finitePrefix Result has 301 conditions, 54 events. 2/54 cut-off events. For 420/420 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 9 event pairs, 0 based on Foata normal form. 1/55 useless extension candidates. Maximal degree in co-relation 233. Up to 12 conditions per place. [2021-10-15 19:37:03,803 INFO L132 encePairwiseOnDemand]: 20/25 looper letters, 26 selfloop transitions, 11 changer transitions 3/54 dead transitions. [2021-10-15 19:37:03,803 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 54 transitions, 528 flow [2021-10-15 19:37:03,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-15 19:37:03,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-15 19:37:03,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 167 transitions. [2021-10-15 19:37:03,805 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.47714285714285715 [2021-10-15 19:37:03,805 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 167 transitions. [2021-10-15 19:37:03,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 167 transitions. [2021-10-15 19:37:03,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:37:03,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 167 transitions. [2021-10-15 19:37:03,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 11.928571428571429) internal successors, (167), 14 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:37:03,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 25.0) internal successors, (375), 15 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:37:03,807 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 25.0) internal successors, (375), 15 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:37:03,807 INFO L186 Difference]: Start difference. First operand has 92 places, 40 transitions, 368 flow. Second operand 14 states and 167 transitions. [2021-10-15 19:37:03,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 54 transitions, 528 flow [2021-10-15 19:37:03,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 54 transitions, 458 flow, removed 16 selfloop flow, removed 19 redundant places. [2021-10-15 19:37:03,816 INFO L242 Difference]: Finished difference. Result has 89 places, 41 transitions, 350 flow [2021-10-15 19:37:03,816 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=350, PETRI_PLACES=89, PETRI_TRANSITIONS=41} [2021-10-15 19:37:03,816 INFO L334 CegarLoopForPetriNet]: 16 programPoint places, 73 predicate places. [2021-10-15 19:37:03,816 INFO L470 AbstractCegarLoop]: Abstraction has has 89 places, 41 transitions, 350 flow [2021-10-15 19:37:03,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 14 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:37:03,817 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:37:03,817 INFO L254 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2021-10-15 19:37:03,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-15 19:37:04,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-10-15 19:37:04,023 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:37:04,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:37:04,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1148586307, now seen corresponding path program 10 times [2021-10-15 19:37:04,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:37:04,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038765161] [2021-10-15 19:37:04,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:37:04,024 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:37:04,032 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:37:04,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1787272382] [2021-10-15 19:37:04,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 19:37:04,033 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:37:04,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:37:04,034 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:37:04,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-15 19:37:05,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 19:37:05,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-15 19:37:05,592 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 19:37:05,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:37:05,648 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 19:37:05,649 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-15 19:37:05,650 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:37:05,652 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:37:05,652 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:37:05,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-10-15 19:37:05,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-15 19:37:05,866 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:37:05,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:37:05 BoogieIcfgContainer [2021-10-15 19:37:05,911 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:37:05,912 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:37:05,912 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:37:05,912 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:37:05,912 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:36:44" (3/4) ... [2021-10-15 19:37:05,914 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-15 19:37:05,993 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:37:05,994 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:37:05,995 INFO L168 Benchmark]: Toolchain (without parser) took 22014.06 ms. Allocated memory was 109.1 MB in the beginning and 161.5 MB in the end (delta: 52.4 MB). Free memory was 77.2 MB in the beginning and 78.4 MB in the end (delta: -1.2 MB). Peak memory consumption was 51.0 MB. Max. memory is 16.1 GB. [2021-10-15 19:37:05,995 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 109.1 MB. Free memory is still 64.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:37:05,996 INFO L168 Benchmark]: CACSL2BoogieTranslator took 244.88 ms. Allocated memory was 109.1 MB in the beginning and 134.2 MB in the end (delta: 25.2 MB). Free memory was 76.9 MB in the beginning and 108.5 MB in the end (delta: -31.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:37:05,996 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.33 ms. Allocated memory is still 134.2 MB. Free memory was 108.5 MB in the beginning and 106.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:37:05,997 INFO L168 Benchmark]: Boogie Preprocessor took 33.68 ms. Allocated memory is still 134.2 MB. Free memory was 106.9 MB in the beginning and 105.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:37:05,997 INFO L168 Benchmark]: RCFGBuilder took 309.62 ms. Allocated memory is still 134.2 MB. Free memory was 105.8 MB in the beginning and 96.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:37:05,998 INFO L168 Benchmark]: TraceAbstraction took 21294.15 ms. Allocated memory was 134.2 MB in the beginning and 161.5 MB in the end (delta: 27.3 MB). Free memory was 95.9 MB in the beginning and 83.7 MB in the end (delta: 12.2 MB). Peak memory consumption was 41.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:37:05,998 INFO L168 Benchmark]: Witness Printer took 82.07 ms. Allocated memory is still 161.5 MB. Free memory was 83.7 MB in the beginning and 78.4 MB in the end (delta: 5.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-15 19:37:06,000 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 109.1 MB. Free memory is still 64.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 244.88 ms. Allocated memory was 109.1 MB in the beginning and 134.2 MB in the end (delta: 25.2 MB). Free memory was 76.9 MB in the beginning and 108.5 MB in the end (delta: -31.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.33 ms. Allocated memory is still 134.2 MB. Free memory was 108.5 MB in the beginning and 106.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.68 ms. Allocated memory is still 134.2 MB. Free memory was 106.9 MB in the beginning and 105.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 309.62 ms. Allocated memory is still 134.2 MB. Free memory was 105.8 MB in the beginning and 96.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 21294.15 ms. Allocated memory was 134.2 MB in the beginning and 161.5 MB in the end (delta: 27.3 MB). Free memory was 95.9 MB in the beginning and 83.7 MB in the end (delta: 12.2 MB). Peak memory consumption was 41.5 MB. Max. memory is 16.1 GB. * Witness Printer took 82.07 ms. Allocated memory is still 161.5 MB. Free memory was 83.7 MB in the beginning and 78.4 MB in the end (delta: 5.2 MB). Peak memory consumption was 6.3 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 - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; VAL [counter=0] [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L23] y = 0 [L24] x = 0 [L25] c = 0 VAL [counter=0] [L27] EXPR counter++ VAL [counter=1] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=1] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=1] [L27] EXPR counter++ VAL [counter=2] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=2] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=2] [L27] EXPR counter++ VAL [counter=3] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=3] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=3] [L27] EXPR counter++ VAL [counter=4] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=4] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=4] [L27] EXPR counter++ VAL [counter=5] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=5] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=5] [L27] EXPR counter++ VAL [counter=6] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=6] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=6] [L27] EXPR counter++ VAL [counter=7] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=7] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=7] [L27] EXPR counter++ VAL [counter=8] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=8] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=8] [L27] EXPR counter++ VAL [counter=9] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=9] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=9] [L27] EXPR counter++ VAL [counter=10] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=10] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=10] [L27] EXPR counter++ VAL [counter=11] [L27] COND FALSE !(counter++<10) [L10] COND TRUE !(cond) VAL [counter=11] [L12] reach_error() VAL [counter=11] - UnprovableResult [Line: 12]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 12]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 4.0ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 21174.1ms, OverallIterations: 23, TraceHistogramMax: 11, EmptinessCheckTime: 0.0ms, AutomataDifference: 3432.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 36.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 123 SDtfs, 85 SDslu, 542 SDs, 0 SdLazy, 1619 SolverSat, 49 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1797.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 601 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1490.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=368occurred in iteration=21, InterpolantAutomatonStates: 240, 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: 142.3ms SsaConstructionTime, 4549.6ms SatisfiabilityAnalysisTime, 4592.9ms InterpolantComputationTime, 599 NumberOfCodeBlocks, 591 NumberOfCodeBlocksAsserted, 78 NumberOfCheckSat, 530 ConstructedInterpolants, 0 QuantifiedInterpolants, 2714 SizeOfPredicates, 95 NumberOfNonLiveVariables, 2862 ConjunctsInSsa, 414 ConjunctsInUnsatCore, 22 InterpolantComputations, 1 PerfectInterpolantSequences, 20/1264 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 RESULT: Ultimate proved your program to be incorrect! [2021-10-15 19:37:06,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_779cb567-6894-450d-8e95-b3c8ae87e087/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...