./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound1.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_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/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_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/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_4008c52d-b437-43d9-b039-43ca64a1bffa/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 89424fd59ce1746651f12884595f9ce3dcee5e0b ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 19:19:04,476 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:19:04,479 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:19:04,536 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:19:04,536 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:19:04,541 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:19:04,543 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:19:04,547 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:19:04,549 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:19:04,555 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:19:04,556 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:19:04,558 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:19:04,558 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:19:04,561 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:19:04,563 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:19:04,567 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:19:04,569 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:19:04,570 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:19:04,572 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:19:04,580 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:19:04,582 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:19:04,583 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:19:04,586 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:19:04,587 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:19:04,596 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:19:04,597 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:19:04,597 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:19:04,599 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:19:04,600 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:19:04,601 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:19:04,602 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:19:04,603 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:19:04,605 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:19:04,606 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:19:04,608 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:19:04,608 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:19:04,609 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:19:04,609 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:19:04,609 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:19:04,610 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:19:04,611 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:19:04,612 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:19:04,653 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:19:04,653 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:19:04,654 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:19:04,654 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:19:04,656 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:19:04,656 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:19:04,656 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:19:04,656 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:19:04,657 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:19:04,657 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:19:04,658 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:19:04,658 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:19:04,658 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:19:04,658 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:19:04,659 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:19:04,659 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:19:04,659 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:19:04,659 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:19:04,659 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:19:04,660 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:19:04,660 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:19:04,660 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:19:04,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:19:04,660 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:19:04,661 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:19:04,661 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:19:04,661 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:19:04,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:19:04,661 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:19:04,663 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:19:04,663 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:19:04,663 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:19:04,664 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_4008c52d-b437-43d9-b039-43ca64a1bffa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89424fd59ce1746651f12884595f9ce3dcee5e0b [2021-10-15 19:19:04,929 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:19:04,968 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:19:04,972 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:19:04,973 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:19:04,974 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:19:04,975 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound1.c [2021-10-15 19:19:05,064 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/data/099ab7052/39234f5487dc47b4850e76e485a38d8d/FLAG97fd567a3 [2021-10-15 19:19:05,538 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:19:05,539 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound1.c [2021-10-15 19:19:05,546 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/data/099ab7052/39234f5487dc47b4850e76e485a38d8d/FLAG97fd567a3 [2021-10-15 19:19:05,912 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/data/099ab7052/39234f5487dc47b4850e76e485a38d8d [2021-10-15 19:19:05,914 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:19:05,915 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:19:05,917 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:19:05,917 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:19:05,922 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:19:05,923 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:19:05" (1/1) ... [2021-10-15 19:19:05,924 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@179c771a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:19:05, skipping insertion in model container [2021-10-15 19:19:05,924 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:19:05" (1/1) ... [2021-10-15 19:19:05,932 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:19:05,951 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:19:06,132 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_4008c52d-b437-43d9-b039-43ca64a1bffa/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound1.c[490,503] [2021-10-15 19:19:06,152 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:19:06,161 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:19:06,173 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_4008c52d-b437-43d9-b039-43ca64a1bffa/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound1.c[490,503] [2021-10-15 19:19:06,183 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:19:06,196 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:19:06,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:19:06 WrapperNode [2021-10-15 19:19:06,197 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:19:06,198 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:19:06,199 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:19:06,199 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:19:06,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:19:06" (1/1) ... [2021-10-15 19:19:06,213 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:19:06" (1/1) ... [2021-10-15 19:19:06,239 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:19:06,240 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:19:06,240 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:19:06,240 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:19:06,249 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:19:06" (1/1) ... [2021-10-15 19:19:06,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:19:06" (1/1) ... [2021-10-15 19:19:06,251 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:19:06" (1/1) ... [2021-10-15 19:19:06,252 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:19:06" (1/1) ... [2021-10-15 19:19:06,257 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:19:06" (1/1) ... [2021-10-15 19:19:06,261 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:19:06" (1/1) ... [2021-10-15 19:19:06,263 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:19:06" (1/1) ... [2021-10-15 19:19:06,266 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:19:06,267 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:19:06,267 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:19:06,267 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:19:06,268 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:19:06" (1/1) ... [2021-10-15 19:19:06,275 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:19:06,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:19:06,311 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:19:06,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:19:06,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:19:06,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:19:06,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:19:06,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:19:06,675 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:19:06,676 INFO L299 CfgBuilder]: Removed 30 assume(true) statements. [2021-10-15 19:19:06,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:19:06 BoogieIcfgContainer [2021-10-15 19:19:06,693 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:19:06,695 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:19:06,696 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:19:06,700 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:19:06,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:19:05" (1/3) ... [2021-10-15 19:19:06,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27ca5685 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:19:06, skipping insertion in model container [2021-10-15 19:19:06,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:19:06" (2/3) ... [2021-10-15 19:19:06,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27ca5685 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:19:06, skipping insertion in model container [2021-10-15 19:19:06,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:19:06" (3/3) ... [2021-10-15 19:19:06,703 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound1.c [2021-10-15 19:19:06,710 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:19:06,710 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-10-15 19:19:06,770 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:19:06,779 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 19:19:06,779 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-10-15 19:19:06,810 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 45 places, 62 transitions, 124 flow [2021-10-15 19:19:06,889 INFO L129 PetriNetUnfolder]: 18/62 cut-off events. [2021-10-15 19:19:06,889 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:19:06,892 INFO L84 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 62 events. 18/62 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 83 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-10-15 19:19:06,892 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 62 transitions, 124 flow [2021-10-15 19:19:06,900 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 57 transitions, 114 flow [2021-10-15 19:19:06,910 INFO L129 PetriNetUnfolder]: 11/33 cut-off events. [2021-10-15 19:19:06,910 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:19:06,910 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:19:06,911 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:19:06,912 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:19:06,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:19:06,918 INFO L82 PathProgramCache]: Analyzing trace with hash 227231803, now seen corresponding path program 1 times [2021-10-15 19:19:06,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:19:06,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857771280] [2021-10-15 19:19:06,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:19:06,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:19:07,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:19:07,150 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 19:19:07,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:19:07,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857771280] [2021-10-15 19:19:07,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857771280] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:19:07,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:19:07,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:19:07,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412247677] [2021-10-15 19:19:07,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-15 19:19:07,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:19:07,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-15 19:19:07,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-15 19:19:07,210 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 62 [2021-10-15 19:19:07,215 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 57 transitions, 114 flow. Second operand has 2 states, 2 states have (on average 48.0) internal successors, (96), 2 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:07,216 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:19:07,216 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 62 [2021-10-15 19:19:07,218 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:19:07,250 INFO L129 PetriNetUnfolder]: 2/42 cut-off events. [2021-10-15 19:19:07,253 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:19:07,254 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 42 events. 2/42 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 48 event pairs, 0 based on Foata normal form. 13/48 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2021-10-15 19:19:07,256 INFO L132 encePairwiseOnDemand]: 47/62 looper letters, 0 selfloop transitions, 0 changer transitions 0/42 dead transitions. [2021-10-15 19:19:07,257 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 42 transitions, 84 flow [2021-10-15 19:19:07,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-15 19:19:07,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-10-15 19:19:07,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 107 transitions. [2021-10-15 19:19:07,273 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8629032258064516 [2021-10-15 19:19:07,274 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 107 transitions. [2021-10-15 19:19:07,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 107 transitions. [2021-10-15 19:19:07,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:19:07,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 107 transitions. [2021-10-15 19:19:07,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 53.5) internal successors, (107), 2 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:07,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:07,292 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:07,294 INFO L186 Difference]: Start difference. First operand has 41 places, 57 transitions, 114 flow. Second operand 2 states and 107 transitions. [2021-10-15 19:19:07,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 42 transitions, 84 flow [2021-10-15 19:19:07,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 42 transitions, 84 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:19:07,305 INFO L242 Difference]: Finished difference. Result has 42 places, 42 transitions, 84 flow [2021-10-15 19:19:07,308 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=84, PETRI_PLACES=42, PETRI_TRANSITIONS=42} [2021-10-15 19:19:07,309 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 1 predicate places. [2021-10-15 19:19:07,310 INFO L470 AbstractCegarLoop]: Abstraction has has 42 places, 42 transitions, 84 flow [2021-10-15 19:19:07,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 48.0) internal successors, (96), 2 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:07,311 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:19:07,311 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:19:07,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:19:07,312 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:19:07,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:19:07,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1122121916, now seen corresponding path program 1 times [2021-10-15 19:19:07,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:19:07,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026459859] [2021-10-15 19:19:07,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:19:07,315 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:19:07,360 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:19:07,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1982018408] [2021-10-15 19:19:07,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:19:07,364 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:19:07,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:19:07,367 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:19:07,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:19:07,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:19:07,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 19:19:07,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:19:07,726 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 19:19:07,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:19:07,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026459859] [2021-10-15 19:19:07,727 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:19:07,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982018408] [2021-10-15 19:19:07,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982018408] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:19:07,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:19:07,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 19:19:07,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041216820] [2021-10-15 19:19:07,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:19:07,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:19:07,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:19:07,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:19:07,734 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 62 [2021-10-15 19:19:07,735 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 42 transitions, 84 flow. Second operand has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:07,735 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:19:07,735 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 62 [2021-10-15 19:19:07,735 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:19:07,861 INFO L129 PetriNetUnfolder]: 3/63 cut-off events. [2021-10-15 19:19:07,862 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:19:07,862 INFO L84 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 63 events. 3/63 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 71 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 94. Up to 12 conditions per place. [2021-10-15 19:19:07,863 INFO L132 encePairwiseOnDemand]: 57/62 looper letters, 27 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2021-10-15 19:19:07,863 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 50 transitions, 162 flow [2021-10-15 19:19:07,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:19:07,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:19:07,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2021-10-15 19:19:07,868 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.45698924731182794 [2021-10-15 19:19:07,869 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 170 transitions. [2021-10-15 19:19:07,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 170 transitions. [2021-10-15 19:19:07,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:19:07,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 170 transitions. [2021-10-15 19:19:07,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 28.333333333333332) internal successors, (170), 6 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:07,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 62.0) internal successors, (434), 7 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:07,876 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 62.0) internal successors, (434), 7 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:07,877 INFO L186 Difference]: Start difference. First operand has 42 places, 42 transitions, 84 flow. Second operand 6 states and 170 transitions. [2021-10-15 19:19:07,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 50 transitions, 162 flow [2021-10-15 19:19:07,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 50 transitions, 162 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:19:07,882 INFO L242 Difference]: Finished difference. Result has 48 places, 43 transitions, 100 flow [2021-10-15 19:19:07,882 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=100, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2021-10-15 19:19:07,883 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 7 predicate places. [2021-10-15 19:19:07,883 INFO L470 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 100 flow [2021-10-15 19:19:07,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:07,884 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:19:07,885 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:19:07,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:19:08,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:19:08,106 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:19:08,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:19:08,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1122125890, now seen corresponding path program 1 times [2021-10-15 19:19:08,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:19:08,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363476093] [2021-10-15 19:19:08,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:19:08,108 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:19:08,132 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:19:08,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [365336705] [2021-10-15 19:19:08,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:19:08,133 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:19:08,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:19:08,134 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:19:08,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:19:08,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:19:08,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-15 19:19:08,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:19:08,479 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 19:19:08,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:19:08,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363476093] [2021-10-15 19:19:08,480 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:19:08,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365336705] [2021-10-15 19:19:08,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365336705] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:19:08,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:19:08,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-15 19:19:08,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251495169] [2021-10-15 19:19:08,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:19:08,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:19:08,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:19:08,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:19:08,486 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 62 [2021-10-15 19:19:08,486 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 100 flow. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:08,486 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:19:08,487 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 62 [2021-10-15 19:19:08,487 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:19:08,689 INFO L129 PetriNetUnfolder]: 4/80 cut-off events. [2021-10-15 19:19:08,689 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-10-15 19:19:08,689 INFO L84 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 80 events. 4/80 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 152 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 153. Up to 25 conditions per place. [2021-10-15 19:19:08,690 INFO L132 encePairwiseOnDemand]: 51/62 looper letters, 53 selfloop transitions, 11 changer transitions 0/72 dead transitions. [2021-10-15 19:19:08,690 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 72 transitions, 289 flow [2021-10-15 19:19:08,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 19:19:08,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-15 19:19:08,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2021-10-15 19:19:08,693 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.2923387096774194 [2021-10-15 19:19:08,693 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 145 transitions. [2021-10-15 19:19:08,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 145 transitions. [2021-10-15 19:19:08,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:19:08,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 145 transitions. [2021-10-15 19:19:08,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:08,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 62.0) internal successors, (558), 9 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:08,697 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 62.0) internal successors, (558), 9 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:08,697 INFO L186 Difference]: Start difference. First operand has 48 places, 43 transitions, 100 flow. Second operand 8 states and 145 transitions. [2021-10-15 19:19:08,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 72 transitions, 289 flow [2021-10-15 19:19:08,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 72 transitions, 284 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-10-15 19:19:08,701 INFO L242 Difference]: Finished difference. Result has 55 places, 48 transitions, 152 flow [2021-10-15 19:19:08,702 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=152, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2021-10-15 19:19:08,702 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 14 predicate places. [2021-10-15 19:19:08,702 INFO L470 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 152 flow [2021-10-15 19:19:08,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:08,703 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:19:08,703 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:19:08,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:19:08,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:19:08,919 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:19:08,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:19:08,920 INFO L82 PathProgramCache]: Analyzing trace with hash 326346277, now seen corresponding path program 1 times [2021-10-15 19:19:08,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:19:08,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953173244] [2021-10-15 19:19:08,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:19:08,920 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:19:08,937 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:19:08,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [781259942] [2021-10-15 19:19:08,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:19:08,938 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:19:08,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:19:08,954 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:19:08,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 19:19:09,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:19:09,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-15 19:19:09,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:19:09,464 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 19:19:09,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:19:09,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953173244] [2021-10-15 19:19:09,465 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:19:09,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781259942] [2021-10-15 19:19:09,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781259942] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:19:09,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:19:09,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-15 19:19:09,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726817969] [2021-10-15 19:19:09,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:19:09,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:19:09,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:19:09,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:19:09,469 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 62 [2021-10-15 19:19:09,469 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 152 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:09,470 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:19:09,470 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 62 [2021-10-15 19:19:09,470 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:19:09,625 INFO L129 PetriNetUnfolder]: 4/76 cut-off events. [2021-10-15 19:19:09,625 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2021-10-15 19:19:09,626 INFO L84 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 76 events. 4/76 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 140 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 164. Up to 23 conditions per place. [2021-10-15 19:19:09,627 INFO L132 encePairwiseOnDemand]: 51/62 looper letters, 35 selfloop transitions, 12 changer transitions 0/59 dead transitions. [2021-10-15 19:19:09,627 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 59 transitions, 274 flow [2021-10-15 19:19:09,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-15 19:19:09,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-15 19:19:09,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2021-10-15 19:19:09,630 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.28225806451612906 [2021-10-15 19:19:09,630 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 175 transitions. [2021-10-15 19:19:09,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 175 transitions. [2021-10-15 19:19:09,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:19:09,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 175 transitions. [2021-10-15 19:19:09,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 17.5) internal successors, (175), 10 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 19:19:09,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 62.0) internal successors, (682), 11 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:09,634 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 62.0) internal successors, (682), 11 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:09,635 INFO L186 Difference]: Start difference. First operand has 55 places, 48 transitions, 152 flow. Second operand 10 states and 175 transitions. [2021-10-15 19:19:09,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 59 transitions, 274 flow [2021-10-15 19:19:09,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 59 transitions, 269 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-10-15 19:19:09,639 INFO L242 Difference]: Finished difference. Result has 63 places, 50 transitions, 192 flow [2021-10-15 19:19:09,639 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=192, PETRI_PLACES=63, PETRI_TRANSITIONS=50} [2021-10-15 19:19:09,639 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 22 predicate places. [2021-10-15 19:19:09,639 INFO L470 AbstractCegarLoop]: Abstraction has has 63 places, 50 transitions, 192 flow [2021-10-15 19:19:09,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:09,640 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:19:09,640 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:19:09,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 19:19:09,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:19:09,854 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:19:09,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:19:09,854 INFO L82 PathProgramCache]: Analyzing trace with hash 86317224, now seen corresponding path program 1 times [2021-10-15 19:19:09,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:19:09,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527614913] [2021-10-15 19:19:09,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:19:09,855 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:19:09,874 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:19:09,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [566212430] [2021-10-15 19:19:09,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:19:09,875 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:19:09,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:19:09,876 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:19:09,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 19:19:09,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:19:09,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-15 19:19:09,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:19:10,594 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 19:19:10,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:19:10,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527614913] [2021-10-15 19:19:10,595 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:19:10,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566212430] [2021-10-15 19:19:10,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566212430] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:19:10,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:19:10,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-15 19:19:10,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659410109] [2021-10-15 19:19:10,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-15 19:19:10,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:19:10,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-15 19:19:10,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-10-15 19:19:10,604 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 62 [2021-10-15 19:19:10,605 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 50 transitions, 192 flow. Second operand has 12 states, 12 states have (on average 12.583333333333334) internal successors, (151), 12 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:10,605 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:19:10,605 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 62 [2021-10-15 19:19:10,606 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:19:10,930 INFO L129 PetriNetUnfolder]: 4/72 cut-off events. [2021-10-15 19:19:10,930 INFO L130 PetriNetUnfolder]: For 40/40 co-relation queries the response was YES. [2021-10-15 19:19:10,930 INFO L84 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 72 events. 4/72 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 120 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 185. Up to 24 conditions per place. [2021-10-15 19:19:10,931 INFO L132 encePairwiseOnDemand]: 48/62 looper letters, 38 selfloop transitions, 14 changer transitions 0/60 dead transitions. [2021-10-15 19:19:10,931 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 60 transitions, 322 flow [2021-10-15 19:19:10,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-15 19:19:10,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-15 19:19:10,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 203 transitions. [2021-10-15 19:19:10,934 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.23387096774193547 [2021-10-15 19:19:10,934 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 203 transitions. [2021-10-15 19:19:10,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 203 transitions. [2021-10-15 19:19:10,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:19:10,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 203 transitions. [2021-10-15 19:19:10,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 14.5) internal successors, (203), 14 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:10,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 62.0) internal successors, (930), 15 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:10,938 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 62.0) internal successors, (930), 15 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:10,938 INFO L186 Difference]: Start difference. First operand has 63 places, 50 transitions, 192 flow. Second operand 14 states and 203 transitions. [2021-10-15 19:19:10,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 60 transitions, 322 flow [2021-10-15 19:19:10,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 60 transitions, 304 flow, removed 0 selfloop flow, removed 8 redundant places. [2021-10-15 19:19:10,943 INFO L242 Difference]: Finished difference. Result has 69 places, 51 transitions, 210 flow [2021-10-15 19:19:10,943 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=210, PETRI_PLACES=69, PETRI_TRANSITIONS=51} [2021-10-15 19:19:10,944 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 28 predicate places. [2021-10-15 19:19:10,944 INFO L470 AbstractCegarLoop]: Abstraction has has 69 places, 51 transitions, 210 flow [2021-10-15 19:19:10,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.583333333333334) internal successors, (151), 12 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:10,944 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:19:10,945 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:19:10,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 19:19:11,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:19:11,166 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:19:11,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:19:11,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1346631627, now seen corresponding path program 1 times [2021-10-15 19:19:11,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:19:11,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932550667] [2021-10-15 19:19:11,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:19:11,167 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:19:11,194 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:19:11,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1404190379] [2021-10-15 19:19:11,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:19:11,197 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:19:11,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:19:11,210 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:19:11,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 19:19:11,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:19:11,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-15 19:19:11,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:19:11,916 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 19:19:11,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:19:11,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932550667] [2021-10-15 19:19:11,916 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:19:11,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404190379] [2021-10-15 19:19:11,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404190379] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:19:11,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:19:11,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-15 19:19:11,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744866026] [2021-10-15 19:19:11,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 19:19:11,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:19:11,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 19:19:11,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-15 19:19:11,920 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 62 [2021-10-15 19:19:11,920 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 51 transitions, 210 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:11,920 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:19:11,921 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 62 [2021-10-15 19:19:11,921 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:19:12,244 INFO L129 PetriNetUnfolder]: 5/73 cut-off events. [2021-10-15 19:19:12,244 INFO L130 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2021-10-15 19:19:12,245 INFO L84 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 73 events. 5/73 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 109 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 203. Up to 25 conditions per place. [2021-10-15 19:19:12,245 INFO L132 encePairwiseOnDemand]: 49/62 looper letters, 39 selfloop transitions, 16 changer transitions 0/63 dead transitions. [2021-10-15 19:19:12,246 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 63 transitions, 359 flow [2021-10-15 19:19:12,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-15 19:19:12,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-15 19:19:12,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 174 transitions. [2021-10-15 19:19:12,251 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.25513196480938416 [2021-10-15 19:19:12,251 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 174 transitions. [2021-10-15 19:19:12,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 174 transitions. [2021-10-15 19:19:12,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:19:12,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 174 transitions. [2021-10-15 19:19:12,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 15.818181818181818) internal successors, (174), 11 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 19:19:12,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 62.0) internal successors, (744), 12 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:12,255 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 62.0) internal successors, (744), 12 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:12,255 INFO L186 Difference]: Start difference. First operand has 69 places, 51 transitions, 210 flow. Second operand 11 states and 174 transitions. [2021-10-15 19:19:12,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 63 transitions, 359 flow [2021-10-15 19:19:12,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 63 transitions, 340 flow, removed 0 selfloop flow, removed 10 redundant places. [2021-10-15 19:19:12,259 INFO L242 Difference]: Finished difference. Result has 72 places, 56 transitions, 264 flow [2021-10-15 19:19:12,260 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=264, PETRI_PLACES=72, PETRI_TRANSITIONS=56} [2021-10-15 19:19:12,260 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2021-10-15 19:19:12,260 INFO L470 AbstractCegarLoop]: Abstraction has has 72 places, 56 transitions, 264 flow [2021-10-15 19:19:12,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:12,260 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:19:12,261 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:19:12,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-15 19:19:12,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:19:12,466 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:19:12,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:19:12,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1781730828, now seen corresponding path program 1 times [2021-10-15 19:19:12,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:19:12,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017935220] [2021-10-15 19:19:12,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:19:12,467 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:19:12,481 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:19:12,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1418816897] [2021-10-15 19:19:12,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:19:12,482 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:19:12,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:19:12,483 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:19:12,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-15 19:19:12,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:19:12,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-15 19:19:12,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:19:13,015 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 19:19:13,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:19:13,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017935220] [2021-10-15 19:19:13,016 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:19:13,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418816897] [2021-10-15 19:19:13,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418816897] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:19:13,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:19:13,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-15 19:19:13,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859517871] [2021-10-15 19:19:13,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-15 19:19:13,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:19:13,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-15 19:19:13,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-15 19:19:13,019 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 62 [2021-10-15 19:19:13,019 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 56 transitions, 264 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:13,019 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:19:13,019 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 62 [2021-10-15 19:19:13,019 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:19:13,293 INFO L129 PetriNetUnfolder]: 4/70 cut-off events. [2021-10-15 19:19:13,293 INFO L130 PetriNetUnfolder]: For 76/76 co-relation queries the response was YES. [2021-10-15 19:19:13,294 INFO L84 FinitePrefix]: Finished finitePrefix Result has 235 conditions, 70 events. 4/70 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 101 event pairs, 0 based on Foata normal form. 2/71 useless extension candidates. Maximal degree in co-relation 221. Up to 28 conditions per place. [2021-10-15 19:19:13,294 INFO L132 encePairwiseOnDemand]: 50/62 looper letters, 44 selfloop transitions, 14 changer transitions 0/66 dead transitions. [2021-10-15 19:19:13,295 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 66 transitions, 418 flow [2021-10-15 19:19:13,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-15 19:19:13,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-15 19:19:13,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 188 transitions. [2021-10-15 19:19:13,297 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.23325062034739455 [2021-10-15 19:19:13,297 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 188 transitions. [2021-10-15 19:19:13,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 188 transitions. [2021-10-15 19:19:13,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:19:13,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 188 transitions. [2021-10-15 19:19:13,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 14.461538461538462) internal successors, (188), 13 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:13,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 62.0) internal successors, (868), 14 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:13,301 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 62.0) internal successors, (868), 14 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:13,301 INFO L186 Difference]: Start difference. First operand has 72 places, 56 transitions, 264 flow. Second operand 13 states and 188 transitions. [2021-10-15 19:19:13,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 66 transitions, 418 flow [2021-10-15 19:19:13,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 66 transitions, 409 flow, removed 1 selfloop flow, removed 4 redundant places. [2021-10-15 19:19:13,310 INFO L242 Difference]: Finished difference. Result has 82 places, 56 transitions, 293 flow [2021-10-15 19:19:13,310 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=293, PETRI_PLACES=82, PETRI_TRANSITIONS=56} [2021-10-15 19:19:13,311 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 41 predicate places. [2021-10-15 19:19:13,311 INFO L470 AbstractCegarLoop]: Abstraction has has 82 places, 56 transitions, 293 flow [2021-10-15 19:19:13,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:13,311 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:19:13,312 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:19:13,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-15 19:19:13,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-15 19:19:13,526 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:19:13,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:19:13,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1655371511, now seen corresponding path program 1 times [2021-10-15 19:19:13,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:19:13,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510513836] [2021-10-15 19:19:13,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:19:13,527 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:19:13,540 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:19:13,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [412426616] [2021-10-15 19:19:13,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:19:13,540 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:19:13,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:19:13,541 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:19:13,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-15 19:19:13,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:19:13,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-15 19:19:13,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:19:14,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:19:14,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:19:14,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510513836] [2021-10-15 19:19:14,004 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:19:14,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412426616] [2021-10-15 19:19:14,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412426616] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:19:14,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:19:14,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-15 19:19:14,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390970460] [2021-10-15 19:19:14,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:19:14,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:19:14,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:19:14,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:19:14,007 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 62 [2021-10-15 19:19:14,008 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 56 transitions, 293 flow. Second operand has 8 states, 8 states have (on average 24.625) internal successors, (197), 8 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:14,008 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:19:14,008 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 62 [2021-10-15 19:19:14,008 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:19:14,159 INFO L129 PetriNetUnfolder]: 3/68 cut-off events. [2021-10-15 19:19:14,159 INFO L130 PetriNetUnfolder]: For 121/121 co-relation queries the response was YES. [2021-10-15 19:19:14,160 INFO L84 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 68 events. 3/68 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 55 event pairs, 0 based on Foata normal form. 1/68 useless extension candidates. Maximal degree in co-relation 204. Up to 18 conditions per place. [2021-10-15 19:19:14,160 INFO L132 encePairwiseOnDemand]: 52/62 looper letters, 28 selfloop transitions, 9 changer transitions 0/58 dead transitions. [2021-10-15 19:19:14,160 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 58 transitions, 366 flow [2021-10-15 19:19:14,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 19:19:14,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-15 19:19:14,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2021-10-15 19:19:14,162 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2021-10-15 19:19:14,162 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 234 transitions. [2021-10-15 19:19:14,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 234 transitions. [2021-10-15 19:19:14,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:19:14,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 234 transitions. [2021-10-15 19:19:14,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 26.0) internal successors, (234), 9 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:14,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 62.0) internal successors, (620), 10 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:14,166 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 62.0) internal successors, (620), 10 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:14,166 INFO L186 Difference]: Start difference. First operand has 82 places, 56 transitions, 293 flow. Second operand 9 states and 234 transitions. [2021-10-15 19:19:14,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 58 transitions, 366 flow [2021-10-15 19:19:14,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 58 transitions, 338 flow, removed 2 selfloop flow, removed 10 redundant places. [2021-10-15 19:19:14,170 INFO L242 Difference]: Finished difference. Result has 81 places, 55 transitions, 270 flow [2021-10-15 19:19:14,171 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=270, PETRI_PLACES=81, PETRI_TRANSITIONS=55} [2021-10-15 19:19:14,171 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 40 predicate places. [2021-10-15 19:19:14,171 INFO L470 AbstractCegarLoop]: Abstraction has has 81 places, 55 transitions, 270 flow [2021-10-15 19:19:14,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.625) internal successors, (197), 8 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:14,172 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:19:14,172 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:19:14,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-15 19:19:14,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:19:14,394 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:19:14,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:19:14,394 INFO L82 PathProgramCache]: Analyzing trace with hash -50682455, now seen corresponding path program 1 times [2021-10-15 19:19:14,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:19:14,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387055256] [2021-10-15 19:19:14,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:19:14,395 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:19:14,411 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:19:14,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1575292511] [2021-10-15 19:19:14,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:19:14,411 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:19:14,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:19:14,413 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:19:14,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-15 19:19:14,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:19:14,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-15 19:19:14,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:19:14,875 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:19:14,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:19:14,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387055256] [2021-10-15 19:19:14,876 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:19:14,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575292511] [2021-10-15 19:19:14,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575292511] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:19:14,876 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:19:14,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-15 19:19:14,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826226575] [2021-10-15 19:19:14,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 19:19:14,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:19:14,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 19:19:14,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-15 19:19:14,879 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 62 [2021-10-15 19:19:14,880 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 55 transitions, 270 flow. Second operand has 9 states, 9 states have (on average 24.88888888888889) internal successors, (224), 9 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:14,880 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:19:14,880 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 62 [2021-10-15 19:19:14,881 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:19:15,080 INFO L129 PetriNetUnfolder]: 0/43 cut-off events. [2021-10-15 19:19:15,081 INFO L130 PetriNetUnfolder]: For 99/99 co-relation queries the response was YES. [2021-10-15 19:19:15,081 INFO L84 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 43 events. 0/43 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 3 event pairs, 0 based on Foata normal form. 1/43 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2021-10-15 19:19:15,081 INFO L132 encePairwiseOnDemand]: 54/62 looper letters, 19 selfloop transitions, 8 changer transitions 0/38 dead transitions. [2021-10-15 19:19:15,081 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 38 transitions, 261 flow [2021-10-15 19:19:15,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-15 19:19:15,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-15 19:19:15,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 248 transitions. [2021-10-15 19:19:15,084 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4 [2021-10-15 19:19:15,084 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 248 transitions. [2021-10-15 19:19:15,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 248 transitions. [2021-10-15 19:19:15,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:19:15,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 248 transitions. [2021-10-15 19:19:15,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 24.8) internal successors, (248), 10 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:15,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 62.0) internal successors, (682), 11 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:15,088 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 62.0) internal successors, (682), 11 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:15,088 INFO L186 Difference]: Start difference. First operand has 81 places, 55 transitions, 270 flow. Second operand 10 states and 248 transitions. [2021-10-15 19:19:15,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 38 transitions, 261 flow [2021-10-15 19:19:15,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 38 transitions, 163 flow, removed 1 selfloop flow, removed 27 redundant places. [2021-10-15 19:19:15,091 INFO L242 Difference]: Finished difference. Result has 55 places, 36 transitions, 121 flow [2021-10-15 19:19:15,091 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=121, PETRI_PLACES=55, PETRI_TRANSITIONS=36} [2021-10-15 19:19:15,091 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 14 predicate places. [2021-10-15 19:19:15,091 INFO L470 AbstractCegarLoop]: Abstraction has has 55 places, 36 transitions, 121 flow [2021-10-15 19:19:15,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 24.88888888888889) internal successors, (224), 9 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:15,092 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:19:15,092 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:19:15,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-15 19:19:15,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:19:15,314 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:19:15,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:19:15,315 INFO L82 PathProgramCache]: Analyzing trace with hash -50686429, now seen corresponding path program 1 times [2021-10-15 19:19:15,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:19:15,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661938569] [2021-10-15 19:19:15,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:19:15,315 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:19:15,331 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:19:15,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1326044759] [2021-10-15 19:19:15,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:19:15,331 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:19:15,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:19:15,333 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:19:15,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-15 19:19:15,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:19:15,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-15 19:19:15,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:19:16,844 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:19:16,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:19:16,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661938569] [2021-10-15 19:19:16,845 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:19:16,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326044759] [2021-10-15 19:19:16,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326044759] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:19:16,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:19:16,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-15 19:19:16,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285182983] [2021-10-15 19:19:16,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-15 19:19:16,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:19:16,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-15 19:19:16,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-10-15 19:19:16,848 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 62 [2021-10-15 19:19:16,848 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 36 transitions, 121 flow. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 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 19:19:16,848 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:19:16,848 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 62 [2021-10-15 19:19:16,848 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:19:17,181 INFO L129 PetriNetUnfolder]: 0/41 cut-off events. [2021-10-15 19:19:17,181 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2021-10-15 19:19:17,181 INFO L84 FinitePrefix]: Finished finitePrefix Result has 110 conditions, 41 events. 0/41 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 0 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2021-10-15 19:19:17,182 INFO L132 encePairwiseOnDemand]: 48/62 looper letters, 23 selfloop transitions, 14 changer transitions 0/40 dead transitions. [2021-10-15 19:19:17,182 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 40 transitions, 205 flow [2021-10-15 19:19:17,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-15 19:19:17,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-15 19:19:17,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 168 transitions. [2021-10-15 19:19:17,184 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.20843672456575682 [2021-10-15 19:19:17,184 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 168 transitions. [2021-10-15 19:19:17,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 168 transitions. [2021-10-15 19:19:17,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:19:17,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 168 transitions. [2021-10-15 19:19:17,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 12.923076923076923) internal successors, (168), 13 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:17,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 62.0) internal successors, (868), 14 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:17,187 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 62.0) internal successors, (868), 14 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:17,187 INFO L186 Difference]: Start difference. First operand has 55 places, 36 transitions, 121 flow. Second operand 13 states and 168 transitions. [2021-10-15 19:19:17,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 40 transitions, 205 flow [2021-10-15 19:19:17,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 40 transitions, 188 flow, removed 1 selfloop flow, removed 8 redundant places. [2021-10-15 19:19:17,189 INFO L242 Difference]: Finished difference. Result has 57 places, 35 transitions, 130 flow [2021-10-15 19:19:17,190 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=130, PETRI_PLACES=57, PETRI_TRANSITIONS=35} [2021-10-15 19:19:17,190 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2021-10-15 19:19:17,190 INFO L470 AbstractCegarLoop]: Abstraction has has 57 places, 35 transitions, 130 flow [2021-10-15 19:19:17,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 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 19:19:17,191 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:19:17,191 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:19:17,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-15 19:19:17,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-15 19:19:17,406 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:19:17,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:19:17,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1464858938, now seen corresponding path program 1 times [2021-10-15 19:19:17,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:19:17,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460515576] [2021-10-15 19:19:17,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:19:17,407 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:19:17,419 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:19:17,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1905630713] [2021-10-15 19:19:17,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:19:17,430 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:19:17,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:19:17,431 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:19:17,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-15 19:19:17,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:19:17,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-15 19:19:17,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:19:18,689 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:19:18,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:19:18,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460515576] [2021-10-15 19:19:18,690 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:19:18,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905630713] [2021-10-15 19:19:18,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905630713] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:19:18,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:19:18,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-15 19:19:18,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450746569] [2021-10-15 19:19:18,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-15 19:19:18,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:19:18,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-15 19:19:18,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-15 19:19:18,693 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 62 [2021-10-15 19:19:18,693 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 35 transitions, 130 flow. Second operand has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 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 19:19:18,693 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:19:18,693 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 62 [2021-10-15 19:19:18,693 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:19:18,949 INFO L129 PetriNetUnfolder]: 0/39 cut-off events. [2021-10-15 19:19:18,949 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2021-10-15 19:19:18,949 INFO L84 FinitePrefix]: Finished finitePrefix Result has 112 conditions, 39 events. 0/39 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 0 event pairs, 0 based on Foata normal form. 1/40 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2021-10-15 19:19:18,949 INFO L132 encePairwiseOnDemand]: 50/62 looper letters, 0 selfloop transitions, 0 changer transitions 38/38 dead transitions. [2021-10-15 19:19:18,950 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 38 transitions, 210 flow [2021-10-15 19:19:18,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-15 19:19:18,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-15 19:19:18,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 167 transitions. [2021-10-15 19:19:18,952 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.20719602977667495 [2021-10-15 19:19:18,952 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 167 transitions. [2021-10-15 19:19:18,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 167 transitions. [2021-10-15 19:19:18,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:19:18,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 167 transitions. [2021-10-15 19:19:18,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 12.846153846153847) internal successors, (167), 13 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 19:19:18,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 62.0) internal successors, (868), 14 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:18,955 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 62.0) internal successors, (868), 14 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:18,956 INFO L186 Difference]: Start difference. First operand has 57 places, 35 transitions, 130 flow. Second operand 13 states and 167 transitions. [2021-10-15 19:19:18,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 38 transitions, 210 flow [2021-10-15 19:19:18,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 38 transitions, 188 flow, removed 0 selfloop flow, removed 10 redundant places. [2021-10-15 19:19:18,957 INFO L242 Difference]: Finished difference. Result has 57 places, 0 transitions, 0 flow [2021-10-15 19:19:18,957 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=0, PETRI_PLACES=57, PETRI_TRANSITIONS=0} [2021-10-15 19:19:18,958 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2021-10-15 19:19:18,958 INFO L470 AbstractCegarLoop]: Abstraction has has 57 places, 0 transitions, 0 flow [2021-10-15 19:19:18,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 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 19:19:18,961 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:19:18,961 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:19:18,961 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:19:18,962 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:19:18,962 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:19:18,962 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:19:18,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-15 19:19:19,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:19:19,182 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:19:19,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:19:19 BoogieIcfgContainer [2021-10-15 19:19:19,186 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:19:19,187 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:19:19,187 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:19:19,187 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:19:19,188 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:19:06" (3/4) ... [2021-10-15 19:19:19,192 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:19:19,210 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2021-10-15 19:19:19,210 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 19:19:19,210 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:19:19,211 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:19:19,250 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:19:19,250 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:19:19,252 INFO L168 Benchmark]: Toolchain (without parser) took 13335.62 ms. Allocated memory was 90.2 MB in the beginning and 148.9 MB in the end (delta: 58.7 MB). Free memory was 55.5 MB in the beginning and 72.4 MB in the end (delta: -16.9 MB). Peak memory consumption was 40.3 MB. Max. memory is 16.1 GB. [2021-10-15 19:19:19,252 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 90.2 MB. Free memory was 60.0 MB in the beginning and 60.0 MB in the end (delta: 29.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:19:19,252 INFO L168 Benchmark]: CACSL2BoogieTranslator took 281.10 ms. Allocated memory is still 90.2 MB. Free memory was 55.3 MB in the beginning and 64.6 MB in the end (delta: -9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:19:19,253 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.74 ms. Allocated memory is still 90.2 MB. Free memory was 64.6 MB in the beginning and 62.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:19:19,253 INFO L168 Benchmark]: Boogie Preprocessor took 26.49 ms. Allocated memory is still 90.2 MB. Free memory was 62.8 MB in the beginning and 61.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:19:19,254 INFO L168 Benchmark]: RCFGBuilder took 426.72 ms. Allocated memory is still 90.2 MB. Free memory was 61.4 MB in the beginning and 49.9 MB in the end (delta: 11.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-15 19:19:19,254 INFO L168 Benchmark]: TraceAbstraction took 12491.19 ms. Allocated memory was 90.2 MB in the beginning and 148.9 MB in the end (delta: 58.7 MB). Free memory was 49.2 MB in the beginning and 76.5 MB in the end (delta: -27.3 MB). Peak memory consumption was 34.8 MB. Max. memory is 16.1 GB. [2021-10-15 19:19:19,254 INFO L168 Benchmark]: Witness Printer took 63.13 ms. Allocated memory is still 148.9 MB. Free memory was 76.5 MB in the beginning and 72.4 MB in the end (delta: 4.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:19:19,257 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 90.2 MB. Free memory was 60.0 MB in the beginning and 60.0 MB in the end (delta: 29.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 281.10 ms. Allocated memory is still 90.2 MB. Free memory was 55.3 MB in the beginning and 64.6 MB in the end (delta: -9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.74 ms. Allocated memory is still 90.2 MB. Free memory was 64.6 MB in the beginning and 62.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.49 ms. Allocated memory is still 90.2 MB. Free memory was 62.8 MB in the beginning and 61.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 426.72 ms. Allocated memory is still 90.2 MB. Free memory was 61.4 MB in the beginning and 49.9 MB in the end (delta: 11.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 12491.19 ms. Allocated memory was 90.2 MB in the beginning and 148.9 MB in the end (delta: 58.7 MB). Free memory was 49.2 MB in the beginning and 76.5 MB in the end (delta: -27.3 MB). Peak memory consumption was 34.8 MB. Max. memory is 16.1 GB. * Witness Printer took 63.13 ms. Allocated memory is still 148.9 MB. Free memory was 76.5 MB in the beginning and 72.4 MB in the end (delta: 4.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 45 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 9.9ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 12417.3ms, OverallIterations: 11, TraceHistogramMax: 3, EmptinessCheckTime: 0.0ms, AutomataDifference: 2615.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 120.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 152 SDtfs, 669 SDslu, 465 SDs, 0 SdLazy, 1113 SolverSat, 107 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 824.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 322 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1850.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=293occurred in iteration=7, InterpolantAutomatonStates: 109, 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: 94.6ms SsaConstructionTime, 273.8ms SatisfiabilityAnalysisTime, 5325.1ms InterpolantComputationTime, 295 NumberOfCodeBlocks, 295 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 284 ConstructedInterpolants, 0 QuantifiedInterpolants, 3336 SizeOfPredicates, 102 NumberOfNonLiveVariables, 1310 ConjunctsInSsa, 219 ConjunctsInUnsatCore, 11 InterpolantComputations, 7 PerfectInterpolantSequences, 8/43 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 6 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 19:19:19,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4008c52d-b437-43d9-b039-43ca64a1bffa/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...