./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/geo1-ll_valuebound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b79e7b-d2b9-49c0-b65f-585d33020eea/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b79e7b-d2b9-49c0-b65f-585d33020eea/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_d8b79e7b-d2b9-49c0-b65f-585d33020eea/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b79e7b-d2b9-49c0-b65f-585d33020eea/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/geo1-ll_valuebound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b79e7b-d2b9-49c0-b65f-585d33020eea/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_d8b79e7b-d2b9-49c0-b65f-585d33020eea/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 59dea1d94fab146640347bc25db24513cc909493 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 20:22:33,579 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 20:22:33,581 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 20:22:33,632 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 20:22:33,632 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 20:22:33,637 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 20:22:33,639 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 20:22:33,643 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 20:22:33,645 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 20:22:33,651 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 20:22:33,652 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 20:22:33,654 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 20:22:33,655 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 20:22:33,658 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 20:22:33,660 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 20:22:33,666 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 20:22:33,668 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 20:22:33,669 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 20:22:33,672 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 20:22:33,681 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 20:22:33,683 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 20:22:33,684 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 20:22:33,687 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 20:22:33,688 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 20:22:33,692 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 20:22:33,693 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 20:22:33,693 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 20:22:33,695 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 20:22:33,696 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 20:22:33,697 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 20:22:33,698 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 20:22:33,699 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 20:22:33,701 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 20:22:33,702 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 20:22:33,703 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 20:22:33,704 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 20:22:33,704 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 20:22:33,705 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 20:22:33,705 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 20:22:33,706 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 20:22:33,706 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 20:22:33,707 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b79e7b-d2b9-49c0-b65f-585d33020eea/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 20:22:33,757 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 20:22:33,758 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 20:22:33,758 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 20:22:33,758 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 20:22:33,760 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 20:22:33,760 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 20:22:33,760 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 20:22:33,761 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 20:22:33,761 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 20:22:33,761 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 20:22:33,762 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 20:22:33,762 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 20:22:33,763 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 20:22:33,763 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 20:22:33,763 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 20:22:33,763 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 20:22:33,764 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 20:22:33,764 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 20:22:33,764 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 20:22:33,764 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 20:22:33,764 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 20:22:33,765 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 20:22:33,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:22:33,765 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 20:22:33,765 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 20:22:33,766 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 20:22:33,766 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 20:22:33,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 20:22:33,766 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 20:22:33,768 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 20:22:33,769 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 20:22:33,769 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 20:22:33,769 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_d8b79e7b-d2b9-49c0-b65f-585d33020eea/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b79e7b-d2b9-49c0-b65f-585d33020eea/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 59dea1d94fab146640347bc25db24513cc909493 [2021-10-15 20:22:34,085 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 20:22:34,119 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 20:22:34,122 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 20:22:34,123 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 20:22:34,124 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 20:22:34,125 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b79e7b-d2b9-49c0-b65f-585d33020eea/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/nla-digbench-scaling/geo1-ll_valuebound100.c [2021-10-15 20:22:34,184 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b79e7b-d2b9-49c0-b65f-585d33020eea/bin/uautomizer-hJ6jxDFKc3/data/d1ac91343/2a28a11041a74e16a5d31ce8b0a4e359/FLAG6330d9eb4 [2021-10-15 20:22:34,621 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 20:22:34,621 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b79e7b-d2b9-49c0-b65f-585d33020eea/sv-benchmarks/c/nla-digbench-scaling/geo1-ll_valuebound100.c [2021-10-15 20:22:34,627 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b79e7b-d2b9-49c0-b65f-585d33020eea/bin/uautomizer-hJ6jxDFKc3/data/d1ac91343/2a28a11041a74e16a5d31ce8b0a4e359/FLAG6330d9eb4 [2021-10-15 20:22:35,028 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b79e7b-d2b9-49c0-b65f-585d33020eea/bin/uautomizer-hJ6jxDFKc3/data/d1ac91343/2a28a11041a74e16a5d31ce8b0a4e359 [2021-10-15 20:22:35,030 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 20:22:35,031 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 20:22:35,033 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 20:22:35,033 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 20:22:35,037 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 20:22:35,037 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:22:35" (1/1) ... [2021-10-15 20:22:35,039 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fb9a29d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:22:35, skipping insertion in model container [2021-10-15 20:22:35,039 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:22:35" (1/1) ... [2021-10-15 20:22:35,046 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 20:22:35,063 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 20:22:35,216 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_d8b79e7b-d2b9-49c0-b65f-585d33020eea/sv-benchmarks/c/nla-digbench-scaling/geo1-ll_valuebound100.c[546,559] [2021-10-15 20:22:35,228 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:22:35,248 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 20:22:35,260 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_d8b79e7b-d2b9-49c0-b65f-585d33020eea/sv-benchmarks/c/nla-digbench-scaling/geo1-ll_valuebound100.c[546,559] [2021-10-15 20:22:35,266 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:22:35,277 INFO L208 MainTranslator]: Completed translation [2021-10-15 20:22:35,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:22:35 WrapperNode [2021-10-15 20:22:35,278 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 20:22:35,279 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 20:22:35,279 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 20:22:35,279 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 20:22:35,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:22:35" (1/1) ... [2021-10-15 20:22:35,297 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:22:35" (1/1) ... [2021-10-15 20:22:35,326 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 20:22:35,327 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 20:22:35,327 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 20:22:35,327 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 20:22:35,335 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:22:35" (1/1) ... [2021-10-15 20:22:35,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:22:35" (1/1) ... [2021-10-15 20:22:35,350 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:22:35" (1/1) ... [2021-10-15 20:22:35,351 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:22:35" (1/1) ... [2021-10-15 20:22:35,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:22:35" (1/1) ... [2021-10-15 20:22:35,359 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:22:35" (1/1) ... [2021-10-15 20:22:35,366 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:22:35" (1/1) ... [2021-10-15 20:22:35,372 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 20:22:35,375 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 20:22:35,375 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 20:22:35,376 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 20:22:35,377 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:22:35" (1/1) ... [2021-10-15 20:22:35,386 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:22:35,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b79e7b-d2b9-49c0-b65f-585d33020eea/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:22:35,414 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b79e7b-d2b9-49c0-b65f-585d33020eea/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 20:22:35,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b79e7b-d2b9-49c0-b65f-585d33020eea/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 20:22:35,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 20:22:35,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 20:22:35,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 20:22:35,468 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 20:22:35,684 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 20:22:35,684 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-10-15 20:22:35,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:22:35 BoogieIcfgContainer [2021-10-15 20:22:35,686 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 20:22:35,688 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 20:22:35,688 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 20:22:35,691 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 20:22:35,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 08:22:35" (1/3) ... [2021-10-15 20:22:35,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ab514b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:22:35, skipping insertion in model container [2021-10-15 20:22:35,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:22:35" (2/3) ... [2021-10-15 20:22:35,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ab514b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:22:35, skipping insertion in model container [2021-10-15 20:22:35,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:22:35" (3/3) ... [2021-10-15 20:22:35,695 INFO L111 eAbstractionObserver]: Analyzing ICFG geo1-ll_valuebound100.c [2021-10-15 20:22:35,700 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 20:22:35,700 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-15 20:22:35,750 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 20:22:35,758 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-15 20:22:35,758 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-15 20:22:35,772 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 23 places, 31 transitions, 62 flow [2021-10-15 20:22:35,851 INFO L129 PetriNetUnfolder]: 9/31 cut-off events. [2021-10-15 20:22:35,852 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:22:35,853 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32 conditions, 31 events. 9/31 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 21 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-10-15 20:22:35,853 INFO L82 GeneralOperation]: Start removeDead. Operand has 23 places, 31 transitions, 62 flow [2021-10-15 20:22:35,858 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 19 places, 26 transitions, 52 flow [2021-10-15 20:22:35,865 INFO L129 PetriNetUnfolder]: 8/24 cut-off events. [2021-10-15 20:22:35,865 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:22:35,866 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:22:35,866 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:22:35,867 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:22:35,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:22:35,874 INFO L82 PathProgramCache]: Analyzing trace with hash -144177098, now seen corresponding path program 1 times [2021-10-15 20:22:35,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:22:35,883 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837618051] [2021-10-15 20:22:35,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:22:35,884 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:22:35,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:22:36,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:22:36,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:22:36,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837618051] [2021-10-15 20:22:36,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837618051] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:22:36,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:22:36,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 20:22:36,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298530654] [2021-10-15 20:22:36,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-15 20:22:36,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:22:36,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-15 20:22:36,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-15 20:22:36,053 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 31 [2021-10-15 20:22:36,055 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 26 transitions, 52 flow. Second operand has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:22:36,055 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:22:36,056 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 31 [2021-10-15 20:22:36,057 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:22:36,064 INFO L129 PetriNetUnfolder]: 1/19 cut-off events. [2021-10-15 20:22:36,064 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:22:36,065 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21 conditions, 19 events. 1/19 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 5 event pairs, 0 based on Foata normal form. 6/23 useless extension candidates. Maximal degree in co-relation 19. Up to 2 conditions per place. [2021-10-15 20:22:36,066 INFO L132 encePairwiseOnDemand]: 24/31 looper letters, 0 selfloop transitions, 0 changer transitions 0/19 dead transitions. [2021-10-15 20:22:36,066 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 19 transitions, 38 flow [2021-10-15 20:22:36,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-15 20:22:36,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-10-15 20:22:36,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 53 transitions. [2021-10-15 20:22:36,078 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8548387096774194 [2021-10-15 20:22:36,078 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 53 transitions. [2021-10-15 20:22:36,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 53 transitions. [2021-10-15 20:22:36,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:22:36,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 53 transitions. [2021-10-15 20:22:36,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:22:36,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:22:36,088 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:22:36,090 INFO L186 Difference]: Start difference. First operand has 19 places, 26 transitions, 52 flow. Second operand 2 states and 53 transitions. [2021-10-15 20:22:36,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 19 transitions, 38 flow [2021-10-15 20:22:36,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 19 transitions, 38 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:22:36,094 INFO L242 Difference]: Finished difference. Result has 20 places, 19 transitions, 38 flow [2021-10-15 20:22:36,096 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=38, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2021-10-15 20:22:36,097 INFO L334 CegarLoopForPetriNet]: 19 programPoint places, 1 predicate places. [2021-10-15 20:22:36,097 INFO L470 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 38 flow [2021-10-15 20:22:36,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:22:36,097 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:22:36,098 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:22:36,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 20:22:36,098 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:22:36,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:22:36,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1281167042, now seen corresponding path program 1 times [2021-10-15 20:22:36,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:22:36,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439646505] [2021-10-15 20:22:36,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:22:36,100 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:22:36,122 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:22:36,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [365564813] [2021-10-15 20:22:36,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:22:36,123 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:22:36,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b79e7b-d2b9-49c0-b65f-585d33020eea/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:22:36,144 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b79e7b-d2b9-49c0-b65f-585d33020eea/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:22:36,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b79e7b-d2b9-49c0-b65f-585d33020eea/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 20:22:36,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:22:36,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 20:22:36,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:22:36,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:22:36,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:22:36,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439646505] [2021-10-15 20:22:36,418 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:22:36,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365564813] [2021-10-15 20:22:36,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365564813] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:22:36,419 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:22:36,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 20:22:36,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217592159] [2021-10-15 20:22:36,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:22:36,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:22:36,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:22:36,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:22:36,434 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2021-10-15 20:22:36,435 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 19 transitions, 38 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:22:36,435 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:22:36,435 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2021-10-15 20:22:36,436 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:22:36,512 INFO L129 PetriNetUnfolder]: 1/25 cut-off events. [2021-10-15 20:22:36,512 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:22:36,512 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 25 events. 1/25 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 12 event pairs, 0 based on Foata normal form. 1/25 useless extension candidates. Maximal degree in co-relation 39. Up to 10 conditions per place. [2021-10-15 20:22:36,513 INFO L132 encePairwiseOnDemand]: 25/31 looper letters, 9 selfloop transitions, 4 changer transitions 1/24 dead transitions. [2021-10-15 20:22:36,513 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 24 transitions, 76 flow [2021-10-15 20:22:36,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:22:36,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 20:22:36,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 81 transitions. [2021-10-15 20:22:36,516 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5225806451612903 [2021-10-15 20:22:36,516 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 81 transitions. [2021-10-15 20:22:36,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 81 transitions. [2021-10-15 20:22:36,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:22:36,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 81 transitions. [2021-10-15 20:22:36,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:22:36,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:22:36,522 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:22:36,522 INFO L186 Difference]: Start difference. First operand has 20 places, 19 transitions, 38 flow. Second operand 5 states and 81 transitions. [2021-10-15 20:22:36,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 24 transitions, 76 flow [2021-10-15 20:22:36,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 24 transitions, 76 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:22:36,525 INFO L242 Difference]: Finished difference. Result has 26 places, 22 transitions, 66 flow [2021-10-15 20:22:36,525 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=66, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2021-10-15 20:22:36,526 INFO L334 CegarLoopForPetriNet]: 19 programPoint places, 7 predicate places. [2021-10-15 20:22:36,526 INFO L470 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 66 flow [2021-10-15 20:22:36,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:22:36,526 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:22:36,526 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:22:36,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b79e7b-d2b9-49c0-b65f-585d33020eea/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 20:22:36,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b79e7b-d2b9-49c0-b65f-585d33020eea/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:22:36,727 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:22:36,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:22:36,728 INFO L82 PathProgramCache]: Analyzing trace with hash 2131965670, now seen corresponding path program 1 times [2021-10-15 20:22:36,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:22:36,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292744873] [2021-10-15 20:22:36,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:22:36,729 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:22:36,756 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:22:36,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1791178816] [2021-10-15 20:22:36,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:22:36,756 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:22:36,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b79e7b-d2b9-49c0-b65f-585d33020eea/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:22:36,772 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b79e7b-d2b9-49c0-b65f-585d33020eea/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:22:36,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b79e7b-d2b9-49c0-b65f-585d33020eea/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 20:22:36,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:22:36,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-15 20:22:36,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:22:36,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:22:36,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:22:36,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292744873] [2021-10-15 20:22:36,983 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:22:36,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791178816] [2021-10-15 20:22:36,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791178816] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:22:36,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:22:36,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-15 20:22:36,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724893489] [2021-10-15 20:22:36,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:22:36,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:22:36,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:22:36,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:22:36,986 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2021-10-15 20:22:36,987 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 66 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:22:36,987 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:22:36,987 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2021-10-15 20:22:36,987 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:22:37,402 INFO L129 PetriNetUnfolder]: 1/29 cut-off events. [2021-10-15 20:22:37,402 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-10-15 20:22:37,402 INFO L84 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 29 events. 1/29 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 13 event pairs, 0 based on Foata normal form. 2/31 useless extension candidates. Maximal degree in co-relation 60. Up to 10 conditions per place. [2021-10-15 20:22:37,403 INFO L132 encePairwiseOnDemand]: 25/31 looper letters, 11 selfloop transitions, 5 changer transitions 1/27 dead transitions. [2021-10-15 20:22:37,403 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 116 flow [2021-10-15 20:22:37,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 20:22:37,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 20:22:37,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2021-10-15 20:22:37,405 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.521505376344086 [2021-10-15 20:22:37,406 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 97 transitions. [2021-10-15 20:22:37,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 97 transitions. [2021-10-15 20:22:37,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:22:37,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 97 transitions. [2021-10-15 20:22:37,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:22:37,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 31.0) internal successors, (217), 7 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:22:37,409 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 31.0) internal successors, (217), 7 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:22:37,410 INFO L186 Difference]: Start difference. First operand has 26 places, 22 transitions, 66 flow. Second operand 6 states and 97 transitions. [2021-10-15 20:22:37,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 116 flow [2021-10-15 20:22:37,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 27 transitions, 112 flow, removed 1 selfloop flow, removed 1 redundant places. [2021-10-15 20:22:37,416 INFO L242 Difference]: Finished difference. Result has 32 places, 24 transitions, 94 flow [2021-10-15 20:22:37,416 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=94, PETRI_PLACES=32, PETRI_TRANSITIONS=24} [2021-10-15 20:22:37,416 INFO L334 CegarLoopForPetriNet]: 19 programPoint places, 13 predicate places. [2021-10-15 20:22:37,417 INFO L470 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 94 flow [2021-10-15 20:22:37,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:22:37,417 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:22:37,417 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:22:37,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b79e7b-d2b9-49c0-b65f-585d33020eea/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 20:22:37,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b79e7b-d2b9-49c0-b65f-585d33020eea/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:22:37,632 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:22:37,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:22:37,633 INFO L82 PathProgramCache]: Analyzing trace with hash -582143938, now seen corresponding path program 2 times [2021-10-15 20:22:37,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:22:37,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745045123] [2021-10-15 20:22:37,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:22:37,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:22:37,651 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:22:37,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1778872112] [2021-10-15 20:22:37,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 20:22:37,652 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:22:37,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b79e7b-d2b9-49c0-b65f-585d33020eea/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:22:37,653 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b79e7b-d2b9-49c0-b65f-585d33020eea/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:22:37,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b79e7b-d2b9-49c0-b65f-585d33020eea/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 20:22:37,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 20:22:37,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:22:37,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-15 20:22:37,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:22:38,420 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:22:38,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:22:38,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745045123] [2021-10-15 20:22:38,421 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:22:38,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778872112] [2021-10-15 20:22:38,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778872112] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:22:38,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:22:38,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-15 20:22:38,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570565875] [2021-10-15 20:22:38,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 20:22:38,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:22:38,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 20:22:38,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-15 20:22:38,426 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2021-10-15 20:22:38,426 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 94 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:22:38,427 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:22:38,427 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2021-10-15 20:22:38,427 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:22:44,834 INFO L129 PetriNetUnfolder]: 2/34 cut-off events. [2021-10-15 20:22:44,834 INFO L130 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2021-10-15 20:22:44,834 INFO L84 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 34 events. 2/34 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 25 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 83. Up to 9 conditions per place. [2021-10-15 20:22:44,835 INFO L132 encePairwiseOnDemand]: 26/31 looper letters, 12 selfloop transitions, 8 changer transitions 0/30 dead transitions. [2021-10-15 20:22:44,835 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 30 transitions, 158 flow [2021-10-15 20:22:44,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 20:22:44,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-15 20:22:44,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 8 states and 124 transitions. [2021-10-15 20:22:44,837 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5 [2021-10-15 20:22:44,838 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 124 transitions. [2021-10-15 20:22:44,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 124 transitions. [2021-10-15 20:22:44,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:22:44,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 124 transitions. [2021-10-15 20:22:44,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 15.5) internal successors, (124), 8 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 20:22:44,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 31.0) internal successors, (279), 9 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:22:44,841 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 31.0) internal successors, (279), 9 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:22:44,841 INFO L186 Difference]: Start difference. First operand has 32 places, 24 transitions, 94 flow. Second operand 8 states and 124 transitions. [2021-10-15 20:22:44,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 30 transitions, 158 flow [2021-10-15 20:22:44,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 30 transitions, 146 flow, removed 3 selfloop flow, removed 3 redundant places. [2021-10-15 20:22:44,845 INFO L242 Difference]: Finished difference. Result has 39 places, 27 transitions, 123 flow [2021-10-15 20:22:44,845 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=123, PETRI_PLACES=39, PETRI_TRANSITIONS=27} [2021-10-15 20:22:44,846 INFO L334 CegarLoopForPetriNet]: 19 programPoint places, 20 predicate places. [2021-10-15 20:22:44,846 INFO L470 AbstractCegarLoop]: Abstraction has has 39 places, 27 transitions, 123 flow [2021-10-15 20:22:44,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:22:44,847 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:22:44,847 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:22:44,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b79e7b-d2b9-49c0-b65f-585d33020eea/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-10-15 20:22:45,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b79e7b-d2b9-49c0-b65f-585d33020eea/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:22:45,065 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:22:45,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:22:45,065 INFO L82 PathProgramCache]: Analyzing trace with hash -582143938, now seen corresponding path program 3 times [2021-10-15 20:22:45,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:22:45,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140135972] [2021-10-15 20:22:45,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:22:45,066 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:22:45,081 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:22:45,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1230979967] [2021-10-15 20:22:45,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 20:22:45,082 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:22:45,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b79e7b-d2b9-49c0-b65f-585d33020eea/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:22:45,083 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b79e7b-d2b9-49c0-b65f-585d33020eea/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:22:45,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b79e7b-d2b9-49c0-b65f-585d33020eea/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 20:22:45,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-15 20:22:45,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:22:45,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-15 20:22:45,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:22:45,392 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:22:45,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:22:45,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140135972] [2021-10-15 20:22:45,393 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:22:45,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230979967] [2021-10-15 20:22:45,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230979967] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:22:45,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:22:45,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-15 20:22:45,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191918669] [2021-10-15 20:22:45,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 20:22:45,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:22:45,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 20:22:45,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-15 20:22:45,396 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2021-10-15 20:22:45,397 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 27 transitions, 123 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:22:45,397 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:22:45,397 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2021-10-15 20:22:45,397 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:22:45,543 INFO L129 PetriNetUnfolder]: 1/33 cut-off events. [2021-10-15 20:22:45,543 INFO L130 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2021-10-15 20:22:45,544 INFO L84 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 33 events. 1/33 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 13 event pairs, 0 based on Foata normal form. 2/35 useless extension candidates. Maximal degree in co-relation 92. Up to 10 conditions per place. [2021-10-15 20:22:45,544 INFO L132 encePairwiseOnDemand]: 25/31 looper letters, 12 selfloop transitions, 7 changer transitions 1/30 dead transitions. [2021-10-15 20:22:45,544 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 30 transitions, 177 flow [2021-10-15 20:22:45,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 20:22:45,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-15 20:22:45,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2021-10-15 20:22:45,547 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5080645161290323 [2021-10-15 20:22:45,547 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 126 transitions. [2021-10-15 20:22:45,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 126 transitions. [2021-10-15 20:22:45,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:22:45,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 126 transitions. [2021-10-15 20:22:45,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:22:45,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 31.0) internal successors, (279), 9 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:22:45,551 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 31.0) internal successors, (279), 9 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:22:45,551 INFO L186 Difference]: Start difference. First operand has 39 places, 27 transitions, 123 flow. Second operand 8 states and 126 transitions. [2021-10-15 20:22:45,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 30 transitions, 177 flow [2021-10-15 20:22:45,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 30 transitions, 160 flow, removed 4 selfloop flow, removed 5 redundant places. [2021-10-15 20:22:45,556 INFO L242 Difference]: Finished difference. Result has 43 places, 27 transitions, 131 flow [2021-10-15 20:22:45,556 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=131, PETRI_PLACES=43, PETRI_TRANSITIONS=27} [2021-10-15 20:22:45,556 INFO L334 CegarLoopForPetriNet]: 19 programPoint places, 24 predicate places. [2021-10-15 20:22:45,556 INFO L470 AbstractCegarLoop]: Abstraction has has 43 places, 27 transitions, 131 flow [2021-10-15 20:22:45,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:22:45,557 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:22:45,557 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:22:45,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b79e7b-d2b9-49c0-b65f-585d33020eea/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 20:22:45,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b79e7b-d2b9-49c0-b65f-585d33020eea/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:22:45,776 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:22:45,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:22:45,777 INFO L82 PathProgramCache]: Analyzing trace with hash 432838630, now seen corresponding path program 4 times [2021-10-15 20:22:45,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:22:45,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89914543] [2021-10-15 20:22:45,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:22:45,778 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:22:45,801 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:22:45,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1433663323] [2021-10-15 20:22:45,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 20:22:45,810 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:22:45,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b79e7b-d2b9-49c0-b65f-585d33020eea/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:22:45,811 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b79e7b-d2b9-49c0-b65f-585d33020eea/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:22:45,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b79e7b-d2b9-49c0-b65f-585d33020eea/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 20:22:46,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 20:22:46,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:22:46,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-15 20:22:46,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:22:46,353 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:22:46,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:22:46,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89914543] [2021-10-15 20:22:46,353 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:22:46,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433663323] [2021-10-15 20:22:46,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433663323] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:22:46,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:22:46,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-15 20:22:46,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817847617] [2021-10-15 20:22:46,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 20:22:46,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:22:46,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 20:22:46,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-15 20:22:46,355 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2021-10-15 20:22:46,356 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 27 transitions, 131 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:22:46,356 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:22:46,356 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2021-10-15 20:22:46,356 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:22:47,306 INFO L129 PetriNetUnfolder]: 1/37 cut-off events. [2021-10-15 20:22:47,306 INFO L130 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2021-10-15 20:22:47,306 INFO L84 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 37 events. 1/37 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 15 event pairs, 0 based on Foata normal form. 2/39 useless extension candidates. Maximal degree in co-relation 111. Up to 10 conditions per place. [2021-10-15 20:22:47,307 INFO L132 encePairwiseOnDemand]: 25/31 looper letters, 14 selfloop transitions, 8 changer transitions 1/33 dead transitions. [2021-10-15 20:22:47,307 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 33 transitions, 213 flow [2021-10-15 20:22:47,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 20:22:47,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-15 20:22:47,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2021-10-15 20:22:47,309 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5089605734767025 [2021-10-15 20:22:47,309 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 142 transitions. [2021-10-15 20:22:47,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 142 transitions. [2021-10-15 20:22:47,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:22:47,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 142 transitions. [2021-10-15 20:22:47,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:22:47,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 31.0) internal successors, (310), 10 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:22:47,313 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 31.0) internal successors, (310), 10 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:22:47,313 INFO L186 Difference]: Start difference. First operand has 43 places, 27 transitions, 131 flow. Second operand 9 states and 142 transitions. [2021-10-15 20:22:47,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 33 transitions, 213 flow [2021-10-15 20:22:47,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 33 transitions, 195 flow, removed 3 selfloop flow, removed 6 redundant places. [2021-10-15 20:22:47,317 INFO L242 Difference]: Finished difference. Result has 47 places, 29 transitions, 159 flow [2021-10-15 20:22:47,317 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=159, PETRI_PLACES=47, PETRI_TRANSITIONS=29} [2021-10-15 20:22:47,318 INFO L334 CegarLoopForPetriNet]: 19 programPoint places, 28 predicate places. [2021-10-15 20:22:47,318 INFO L470 AbstractCegarLoop]: Abstraction has has 47 places, 29 transitions, 159 flow [2021-10-15 20:22:47,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:22:47,318 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:22:47,318 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:22:47,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b79e7b-d2b9-49c0-b65f-585d33020eea/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-15 20:22:47,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b79e7b-d2b9-49c0-b65f-585d33020eea/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:22:47,540 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:22:47,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:22:47,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1208758078, now seen corresponding path program 5 times [2021-10-15 20:22:47,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:22:47,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760724528] [2021-10-15 20:22:47,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:22:47,542 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:22:47,555 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:22:47,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1167304996] [2021-10-15 20:22:47,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-15 20:22:47,556 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:22:47,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b79e7b-d2b9-49c0-b65f-585d33020eea/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:22:47,557 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b79e7b-d2b9-49c0-b65f-585d33020eea/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:22:47,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b79e7b-d2b9-49c0-b65f-585d33020eea/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-15 20:22:47,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-15 20:22:47,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:22:47,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-15 20:22:47,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:23:02,458 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 14 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:23:02,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:23:02,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760724528] [2021-10-15 20:23:02,458 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:23:02,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167304996] [2021-10-15 20:23:02,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167304996] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:23:02,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:23:02,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-15 20:23:02,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671757077] [2021-10-15 20:23:02,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-15 20:23:02,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:23:02,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-15 20:23:02,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=88, Unknown=5, NotChecked=0, Total=132 [2021-10-15 20:23:02,461 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2021-10-15 20:23:02,461 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 29 transitions, 159 flow. Second operand has 12 states, 12 states have (on average 8.916666666666666) internal successors, (107), 12 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 20:23:02,461 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:23:02,461 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2021-10-15 20:23:02,462 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:23:41,935 WARN L207 SmtUtils]: Spent 7.16 s on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-10-15 20:23:53,212 WARN L207 SmtUtils]: Spent 11.00 s on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2021-10-15 20:23:59,265 INFO L129 PetriNetUnfolder]: 1/32 cut-off events. [2021-10-15 20:23:59,265 INFO L130 PetriNetUnfolder]: For 57/57 co-relation queries the response was YES. [2021-10-15 20:23:59,266 INFO L84 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 32 events. 1/32 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 8 event pairs, 0 based on Foata normal form. 2/34 useless extension candidates. Maximal degree in co-relation 107. Up to 6 conditions per place. [2021-10-15 20:23:59,266 INFO L132 encePairwiseOnDemand]: 21/31 looper letters, 0 selfloop transitions, 0 changer transitions 28/28 dead transitions. [2021-10-15 20:23:59,266 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 28 transitions, 205 flow [2021-10-15 20:23:59,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-15 20:23:59,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-15 20:23:59,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 125 transitions. [2021-10-15 20:23:59,268 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.2880184331797235 [2021-10-15 20:23:59,268 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 125 transitions. [2021-10-15 20:23:59,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 125 transitions. [2021-10-15 20:23:59,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:23:59,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 125 transitions. [2021-10-15 20:23:59,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 8.928571428571429) internal successors, (125), 14 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:23:59,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 31.0) internal successors, (465), 15 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:23:59,271 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 31.0) internal successors, (465), 15 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:23:59,271 INFO L186 Difference]: Start difference. First operand has 47 places, 29 transitions, 159 flow. Second operand 14 states and 125 transitions. [2021-10-15 20:23:59,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 28 transitions, 205 flow [2021-10-15 20:23:59,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 28 transitions, 179 flow, removed 6 selfloop flow, removed 7 redundant places. [2021-10-15 20:23:59,274 INFO L242 Difference]: Finished difference. Result has 49 places, 0 transitions, 0 flow [2021-10-15 20:23:59,275 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=0, PETRI_PLACES=49, PETRI_TRANSITIONS=0} [2021-10-15 20:23:59,275 INFO L334 CegarLoopForPetriNet]: 19 programPoint places, 30 predicate places. [2021-10-15 20:23:59,275 INFO L470 AbstractCegarLoop]: Abstraction has has 49 places, 0 transitions, 0 flow [2021-10-15 20:23:59,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.916666666666666) internal successors, (107), 12 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 20:23:59,278 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:23:59,278 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:23:59,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b79e7b-d2b9-49c0-b65f-585d33020eea/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-15 20:23:59,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b79e7b-d2b9-49c0-b65f-585d33020eea/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:23:59,483 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 20:23:59,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:23:59 BoogieIcfgContainer [2021-10-15 20:23:59,486 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 20:23:59,487 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 20:23:59,487 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 20:23:59,487 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 20:23:59,487 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:22:35" (3/4) ... [2021-10-15 20:23:59,490 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 20:23:59,508 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-10-15 20:23:59,508 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 20:23:59,508 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:23:59,508 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:23:59,548 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b79e7b-d2b9-49c0-b65f-585d33020eea/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 20:23:59,551 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 20:23:59,552 INFO L168 Benchmark]: Toolchain (without parser) took 84520.67 ms. Allocated memory was 79.7 MB in the beginning and 125.8 MB in the end (delta: 46.1 MB). Free memory was 41.5 MB in the beginning and 73.1 MB in the end (delta: -31.7 MB). Peak memory consumption was 17.4 MB. Max. memory is 16.1 GB. [2021-10-15 20:23:59,553 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 79.7 MB. Free memory was 57.7 MB in the beginning and 57.6 MB in the end (delta: 76.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:23:59,554 INFO L168 Benchmark]: CACSL2BoogieTranslator took 245.23 ms. Allocated memory was 79.7 MB in the beginning and 104.9 MB in the end (delta: 25.2 MB). Free memory was 41.3 MB in the beginning and 78.9 MB in the end (delta: -37.6 MB). Peak memory consumption was 10.9 MB. Max. memory is 16.1 GB. [2021-10-15 20:23:59,557 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.56 ms. Allocated memory is still 104.9 MB. Free memory was 78.9 MB in the beginning and 77.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:23:59,557 INFO L168 Benchmark]: Boogie Preprocessor took 47.31 ms. Allocated memory is still 104.9 MB. Free memory was 77.5 MB in the beginning and 76.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:23:59,558 INFO L168 Benchmark]: RCFGBuilder took 310.93 ms. Allocated memory is still 104.9 MB. Free memory was 76.2 MB in the beginning and 66.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 20:23:59,558 INFO L168 Benchmark]: TraceAbstraction took 83798.28 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 66.3 MB in the beginning and 75.1 MB in the end (delta: -8.9 MB). Peak memory consumption was 12.8 MB. Max. memory is 16.1 GB. [2021-10-15 20:23:59,559 INFO L168 Benchmark]: Witness Printer took 64.82 ms. Allocated memory is still 125.8 MB. Free memory was 75.1 MB in the beginning and 73.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:23:59,561 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 79.7 MB. Free memory was 57.7 MB in the beginning and 57.6 MB in the end (delta: 76.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 245.23 ms. Allocated memory was 79.7 MB in the beginning and 104.9 MB in the end (delta: 25.2 MB). Free memory was 41.3 MB in the beginning and 78.9 MB in the end (delta: -37.6 MB). Peak memory consumption was 10.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 47.56 ms. Allocated memory is still 104.9 MB. Free memory was 78.9 MB in the beginning and 77.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 47.31 ms. Allocated memory is still 104.9 MB. Free memory was 77.5 MB in the beginning and 76.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 310.93 ms. Allocated memory is still 104.9 MB. Free memory was 76.2 MB in the beginning and 66.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 83798.28 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 66.3 MB in the beginning and 75.1 MB in the end (delta: -8.9 MB). Peak memory consumption was 12.8 MB. Max. memory is 16.1 GB. * Witness Printer took 64.82 ms. Allocated memory is still 125.8 MB. Free memory was 75.1 MB in the beginning and 73.1 MB in the end (delta: 2.0 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: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 23 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 6.6ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 83737.7ms, OverallIterations: 7, TraceHistogramMax: 5, EmptinessCheckTime: 0.0ms, AutomataDifference: 64938.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 100.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 34 SDtfs, 34 SDslu, 78 SDs, 0 SdLazy, 339 SolverSat, 50 SolverUnsat, 18 SolverUnknown, 0 SolverNotchecked, 40770.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 129 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 36576.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=159occurred in iteration=6, InterpolantAutomatonStates: 52, 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: 54.6ms SsaConstructionTime, 295.4ms SatisfiabilityAnalysisTime, 16349.4ms InterpolantComputationTime, 127 NumberOfCodeBlocks, 124 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 120 ConstructedInterpolants, 7 QuantifiedInterpolants, 750 SizeOfPredicates, 38 NumberOfNonLiveVariables, 531 ConjunctsInSsa, 116 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 11/57 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 20:23:59,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b79e7b-d2b9-49c0-b65f-585d33020eea/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...