./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/underapprox_2-2.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_bf271c5f-fd7d-46dc-86cc-17b12e2e88fa/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf271c5f-fd7d-46dc-86cc-17b12e2e88fa/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_bf271c5f-fd7d-46dc-86cc-17b12e2e88fa/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf271c5f-fd7d-46dc-86cc-17b12e2e88fa/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-acceleration/underapprox_2-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf271c5f-fd7d-46dc-86cc-17b12e2e88fa/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_bf271c5f-fd7d-46dc-86cc-17b12e2e88fa/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 cd82e87d04e0f7b50b2cbc6595c4c8c661078ee2 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 19:20:36,728 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:20:36,730 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:20:36,767 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:20:36,768 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:20:36,769 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:20:36,771 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:20:36,774 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:20:36,777 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:20:36,778 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:20:36,780 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:20:36,782 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:20:36,782 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:20:36,784 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:20:36,785 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:20:36,787 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:20:36,788 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:20:36,790 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:20:36,792 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:20:36,794 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:20:36,796 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:20:36,801 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:20:36,802 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:20:36,803 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:20:36,808 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:20:36,815 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:20:36,815 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:20:36,816 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:20:36,817 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:20:36,819 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:20:36,821 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:20:36,822 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:20:36,823 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:20:36,825 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:20:36,826 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:20:36,827 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:20:36,828 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:20:36,828 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:20:36,829 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:20:36,829 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:20:36,830 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:20:36,831 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf271c5f-fd7d-46dc-86cc-17b12e2e88fa/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:20:36,872 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:20:36,876 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:20:36,877 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:20:36,877 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:20:36,881 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:20:36,882 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:20:36,882 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:20:36,882 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:20:36,883 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:20:36,883 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:20:36,884 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:20:36,884 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:20:36,884 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:20:36,885 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:20:36,885 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:20:36,885 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:20:36,885 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:20:36,886 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:20:36,886 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:20:36,886 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:20:36,886 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:20:36,887 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:20:36,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:20:36,887 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:20:36,887 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:20:36,888 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:20:36,888 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:20:36,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:20:36,889 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:20:36,891 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:20:36,891 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:20:36,892 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:20:36,892 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_bf271c5f-fd7d-46dc-86cc-17b12e2e88fa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf271c5f-fd7d-46dc-86cc-17b12e2e88fa/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd82e87d04e0f7b50b2cbc6595c4c8c661078ee2 [2021-10-15 19:20:37,150 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:20:37,181 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:20:37,184 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:20:37,185 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:20:37,186 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:20:37,187 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf271c5f-fd7d-46dc-86cc-17b12e2e88fa/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/loop-acceleration/underapprox_2-2.c [2021-10-15 19:20:37,267 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf271c5f-fd7d-46dc-86cc-17b12e2e88fa/bin/uautomizer-hJ6jxDFKc3/data/19fdd13a7/9bec1c76c871498eb774ee08766138a6/FLAG326c202d3 [2021-10-15 19:20:37,744 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:20:37,744 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf271c5f-fd7d-46dc-86cc-17b12e2e88fa/sv-benchmarks/c/loop-acceleration/underapprox_2-2.c [2021-10-15 19:20:37,756 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf271c5f-fd7d-46dc-86cc-17b12e2e88fa/bin/uautomizer-hJ6jxDFKc3/data/19fdd13a7/9bec1c76c871498eb774ee08766138a6/FLAG326c202d3 [2021-10-15 19:20:38,108 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf271c5f-fd7d-46dc-86cc-17b12e2e88fa/bin/uautomizer-hJ6jxDFKc3/data/19fdd13a7/9bec1c76c871498eb774ee08766138a6 [2021-10-15 19:20:38,110 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:20:38,112 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:20:38,113 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:20:38,113 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:20:38,117 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:20:38,118 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:20:38" (1/1) ... [2021-10-15 19:20:38,119 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bfa5798 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:20:38, skipping insertion in model container [2021-10-15 19:20:38,119 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:20:38" (1/1) ... [2021-10-15 19:20:38,126 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:20:38,137 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:20:38,291 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_bf271c5f-fd7d-46dc-86cc-17b12e2e88fa/sv-benchmarks/c/loop-acceleration/underapprox_2-2.c[327,340] [2021-10-15 19:20:38,302 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:20:38,311 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:20:38,323 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_bf271c5f-fd7d-46dc-86cc-17b12e2e88fa/sv-benchmarks/c/loop-acceleration/underapprox_2-2.c[327,340] [2021-10-15 19:20:38,326 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:20:38,339 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:20:38,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:20:38 WrapperNode [2021-10-15 19:20:38,340 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:20:38,341 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:20:38,341 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:20:38,341 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:20:38,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:20:38" (1/1) ... [2021-10-15 19:20:38,353 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:20:38" (1/1) ... [2021-10-15 19:20:38,368 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:20:38,369 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:20:38,369 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:20:38,369 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:20:38,375 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:20:38" (1/1) ... [2021-10-15 19:20:38,375 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:20:38" (1/1) ... [2021-10-15 19:20:38,376 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:20:38" (1/1) ... [2021-10-15 19:20:38,376 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:20:38" (1/1) ... [2021-10-15 19:20:38,379 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:20:38" (1/1) ... [2021-10-15 19:20:38,382 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:20:38" (1/1) ... [2021-10-15 19:20:38,383 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:20:38" (1/1) ... [2021-10-15 19:20:38,384 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:20:38,385 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:20:38,385 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:20:38,385 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:20:38,391 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:20:38" (1/1) ... [2021-10-15 19:20:38,407 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:20:38,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf271c5f-fd7d-46dc-86cc-17b12e2e88fa/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:20:38,428 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf271c5f-fd7d-46dc-86cc-17b12e2e88fa/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:20:38,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf271c5f-fd7d-46dc-86cc-17b12e2e88fa/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:20:38,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:20:38,468 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:20:38,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:20:38,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:20:38,625 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:20:38,625 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-15 19:20:38,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:20:38 BoogieIcfgContainer [2021-10-15 19:20:38,627 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:20:38,646 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:20:38,646 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:20:38,650 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:20:38,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:20:38" (1/3) ... [2021-10-15 19:20:38,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7618f025 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:20:38, skipping insertion in model container [2021-10-15 19:20:38,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:20:38" (2/3) ... [2021-10-15 19:20:38,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7618f025 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:20:38, skipping insertion in model container [2021-10-15 19:20:38,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:20:38" (3/3) ... [2021-10-15 19:20:38,658 INFO L111 eAbstractionObserver]: Analyzing ICFG underapprox_2-2.c [2021-10-15 19:20:38,664 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:20:38,664 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:20:38,718 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:20:38,726 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-15 19:20:38,727 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:20:38,738 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 10 places, 12 transitions, 24 flow [2021-10-15 19:20:38,762 INFO L129 PetriNetUnfolder]: 3/12 cut-off events. [2021-10-15 19:20:38,762 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:20:38,764 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13 conditions, 12 events. 3/12 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 7 event pairs, 0 based on Foata normal form. 0/8 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-10-15 19:20:38,764 INFO L82 GeneralOperation]: Start removeDead. Operand has 10 places, 12 transitions, 24 flow [2021-10-15 19:20:38,772 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 7 places, 8 transitions, 16 flow [2021-10-15 19:20:38,775 INFO L129 PetriNetUnfolder]: 2/7 cut-off events. [2021-10-15 19:20:38,776 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:20:38,776 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:20:38,777 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-15 19:20:38,777 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:20:38,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:20:38,783 INFO L82 PathProgramCache]: Analyzing trace with hash 889752999, now seen corresponding path program 1 times [2021-10-15 19:20:38,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:20:38,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417851058] [2021-10-15 19:20:38,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:20:38,792 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:20:38,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:38,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:38,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:20:38,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417851058] [2021-10-15 19:20:38,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417851058] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:20:38,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:20:38,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:20:38,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460848776] [2021-10-15 19:20:38,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-15 19:20:38,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:20:38,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-15 19:20:38,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-15 19:20:38,951 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 12 [2021-10-15 19:20:38,953 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 7 places, 8 transitions, 16 flow. Second operand has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:38,954 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:20:38,954 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 12 [2021-10-15 19:20:38,955 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:20:38,960 INFO L129 PetriNetUnfolder]: 1/7 cut-off events. [2021-10-15 19:20:38,960 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:20:38,961 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9 conditions, 7 events. 1/7 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 1 event pairs, 0 based on Foata normal form. 1/7 useless extension candidates. Maximal degree in co-relation 7. Up to 2 conditions per place. [2021-10-15 19:20:38,962 INFO L132 encePairwiseOnDemand]: 11/12 looper letters, 0 selfloop transitions, 0 changer transitions 0/7 dead transitions. [2021-10-15 19:20:38,962 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 8 places, 7 transitions, 14 flow [2021-10-15 19:20:38,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-15 19:20:38,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-10-15 19:20:38,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 21 transitions. [2021-10-15 19:20:38,971 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.875 [2021-10-15 19:20:38,972 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 21 transitions. [2021-10-15 19:20:38,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 21 transitions. [2021-10-15 19:20:38,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:20:38,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 21 transitions. [2021-10-15 19:20:38,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:38,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:38,987 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:38,989 INFO L186 Difference]: Start difference. First operand has 7 places, 8 transitions, 16 flow. Second operand 2 states and 21 transitions. [2021-10-15 19:20:38,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 8 places, 7 transitions, 14 flow [2021-10-15 19:20:38,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 8 places, 7 transitions, 14 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:20:38,993 INFO L242 Difference]: Finished difference. Result has 8 places, 7 transitions, 14 flow [2021-10-15 19:20:38,994 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=12, PETRI_DIFFERENCE_MINUEND_FLOW=14, PETRI_DIFFERENCE_MINUEND_PLACES=7, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=14, PETRI_PLACES=8, PETRI_TRANSITIONS=7} [2021-10-15 19:20:38,995 INFO L334 CegarLoopForPetriNet]: 7 programPoint places, 1 predicate places. [2021-10-15 19:20:38,995 INFO L470 AbstractCegarLoop]: Abstraction has has 8 places, 7 transitions, 14 flow [2021-10-15 19:20:38,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:38,996 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:20:38,996 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-15 19:20:38,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:20:38,996 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:20:38,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:20:38,997 INFO L82 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2021-10-15 19:20:38,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:20:38,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722205912] [2021-10-15 19:20:38,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:20:38,998 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:20:39,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:39,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:39,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:20:39,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722205912] [2021-10-15 19:20:39,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722205912] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:20:39,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:20:39,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:20:39,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393821814] [2021-10-15 19:20:39,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:20:39,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:20:39,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:20:39,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:20:39,100 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 12 [2021-10-15 19:20:39,100 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 8 places, 7 transitions, 14 flow. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:39,100 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:20:39,100 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 12 [2021-10-15 19:20:39,101 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:20:39,114 INFO L129 PetriNetUnfolder]: 1/8 cut-off events. [2021-10-15 19:20:39,114 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:20:39,114 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16 conditions, 8 events. 1/8 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 1 event pairs, 0 based on Foata normal form. 0/7 useless extension candidates. Maximal degree in co-relation 13. Up to 5 conditions per place. [2021-10-15 19:20:39,115 INFO L132 encePairwiseOnDemand]: 9/12 looper letters, 3 selfloop transitions, 2 changer transitions 0/8 dead transitions. [2021-10-15 19:20:39,115 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 10 places, 8 transitions, 26 flow [2021-10-15 19:20:39,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:20:39,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:20:39,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 24 transitions. [2021-10-15 19:20:39,117 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2021-10-15 19:20:39,117 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 24 transitions. [2021-10-15 19:20:39,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 24 transitions. [2021-10-15 19:20:39,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:20:39,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 24 transitions. [2021-10-15 19:20:39,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:39,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:39,119 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:39,119 INFO L186 Difference]: Start difference. First operand has 8 places, 7 transitions, 14 flow. Second operand 3 states and 24 transitions. [2021-10-15 19:20:39,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 10 places, 8 transitions, 26 flow [2021-10-15 19:20:39,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 10 places, 8 transitions, 26 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:20:39,122 INFO L242 Difference]: Finished difference. Result has 11 places, 8 transitions, 26 flow [2021-10-15 19:20:39,122 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=12, PETRI_DIFFERENCE_MINUEND_FLOW=14, PETRI_DIFFERENCE_MINUEND_PLACES=8, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=26, PETRI_PLACES=11, PETRI_TRANSITIONS=8} [2021-10-15 19:20:39,123 INFO L334 CegarLoopForPetriNet]: 7 programPoint places, 4 predicate places. [2021-10-15 19:20:39,123 INFO L470 AbstractCegarLoop]: Abstraction has has 11 places, 8 transitions, 26 flow [2021-10-15 19:20:39,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:39,123 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:20:39,123 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:20:39,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:20:39,124 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:20:39,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:20:39,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2021-10-15 19:20:39,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:20:39,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749258334] [2021-10-15 19:20:39,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:20:39,126 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:20:39,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:39,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:39,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:20:39,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749258334] [2021-10-15 19:20:39,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749258334] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:20:39,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266750768] [2021-10-15 19:20:39,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:20:39,217 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:20:39,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf271c5f-fd7d-46dc-86cc-17b12e2e88fa/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:20:39,221 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf271c5f-fd7d-46dc-86cc-17b12e2e88fa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:20:39,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf271c5f-fd7d-46dc-86cc-17b12e2e88fa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:20:39,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:39,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-15 19:20:39,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:20:39,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:39,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266750768] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:20:39,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:20:39,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-10-15 19:20:39,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595429581] [2021-10-15 19:20:39,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:20:39,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:20:39,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:20:39,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:20:39,352 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 12 [2021-10-15 19:20:39,352 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 11 places, 8 transitions, 26 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:39,352 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:20:39,352 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 12 [2021-10-15 19:20:39,353 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:20:39,382 INFO L129 PetriNetUnfolder]: 1/9 cut-off events. [2021-10-15 19:20:39,382 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-15 19:20:39,385 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 9 events. 1/9 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 1 event pairs, 0 based on Foata normal form. 0/8 useless extension candidates. Maximal degree in co-relation 21. Up to 5 conditions per place. [2021-10-15 19:20:39,385 INFO L132 encePairwiseOnDemand]: 9/12 looper letters, 3 selfloop transitions, 3 changer transitions 0/9 dead transitions. [2021-10-15 19:20:39,385 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 14 places, 9 transitions, 42 flow [2021-10-15 19:20:39,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:20:39,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:20:39,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 31 transitions. [2021-10-15 19:20:39,387 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2021-10-15 19:20:39,390 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 31 transitions. [2021-10-15 19:20:39,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 31 transitions. [2021-10-15 19:20:39,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:20:39,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 31 transitions. [2021-10-15 19:20:39,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:39,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:39,393 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:39,394 INFO L186 Difference]: Start difference. First operand has 11 places, 8 transitions, 26 flow. Second operand 4 states and 31 transitions. [2021-10-15 19:20:39,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 14 places, 9 transitions, 42 flow [2021-10-15 19:20:39,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 13 places, 9 transitions, 38 flow, removed 1 selfloop flow, removed 1 redundant places. [2021-10-15 19:20:39,397 INFO L242 Difference]: Finished difference. Result has 14 places, 9 transitions, 38 flow [2021-10-15 19:20:39,399 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=12, PETRI_DIFFERENCE_MINUEND_FLOW=22, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=38, PETRI_PLACES=14, PETRI_TRANSITIONS=9} [2021-10-15 19:20:39,400 INFO L334 CegarLoopForPetriNet]: 7 programPoint places, 7 predicate places. [2021-10-15 19:20:39,400 INFO L470 AbstractCegarLoop]: Abstraction has has 14 places, 9 transitions, 38 flow [2021-10-15 19:20:39,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:39,400 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:20:39,402 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-10-15 19:20:39,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf271c5f-fd7d-46dc-86cc-17b12e2e88fa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:20:39,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf271c5f-fd7d-46dc-86cc-17b12e2e88fa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:20:39,603 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:20:39,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:20:39,604 INFO L82 PathProgramCache]: Analyzing trace with hash 292915403, now seen corresponding path program 2 times [2021-10-15 19:20:39,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:20:39,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182983632] [2021-10-15 19:20:39,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:20:39,604 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:20:39,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:39,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:39,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:20:39,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182983632] [2021-10-15 19:20:39,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182983632] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:20:39,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857553922] [2021-10-15 19:20:39,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:20:39,758 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:20:39,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf271c5f-fd7d-46dc-86cc-17b12e2e88fa/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:20:39,761 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf271c5f-fd7d-46dc-86cc-17b12e2e88fa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:20:39,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf271c5f-fd7d-46dc-86cc-17b12e2e88fa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:20:39,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:20:39,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:20:39,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-15 19:20:39,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:20:39,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:39,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857553922] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:20:39,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:20:39,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-10-15 19:20:39,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998269946] [2021-10-15 19:20:39,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:20:39,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:20:39,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:20:39,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:20:39,905 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 12 [2021-10-15 19:20:39,906 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 14 places, 9 transitions, 38 flow. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:39,906 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:20:39,906 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 12 [2021-10-15 19:20:39,906 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:20:39,931 INFO L129 PetriNetUnfolder]: 1/10 cut-off events. [2021-10-15 19:20:39,931 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-15 19:20:39,931 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 10 events. 1/10 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 1 event pairs, 0 based on Foata normal form. 0/9 useless extension candidates. Maximal degree in co-relation 29. Up to 6 conditions per place. [2021-10-15 19:20:39,931 INFO L132 encePairwiseOnDemand]: 9/12 looper letters, 3 selfloop transitions, 4 changer transitions 0/10 dead transitions. [2021-10-15 19:20:39,932 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 18 places, 10 transitions, 58 flow [2021-10-15 19:20:39,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:20:39,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:20:39,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 38 transitions. [2021-10-15 19:20:39,933 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2021-10-15 19:20:39,933 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 38 transitions. [2021-10-15 19:20:39,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 38 transitions. [2021-10-15 19:20:39,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:20:39,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 38 transitions. [2021-10-15 19:20:39,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:39,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:39,936 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:39,936 INFO L186 Difference]: Start difference. First operand has 14 places, 9 transitions, 38 flow. Second operand 5 states and 38 transitions. [2021-10-15 19:20:39,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 18 places, 10 transitions, 58 flow [2021-10-15 19:20:39,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 10 transitions, 50 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-10-15 19:20:39,938 INFO L242 Difference]: Finished difference. Result has 17 places, 10 transitions, 50 flow [2021-10-15 19:20:39,938 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=12, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=12, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=50, PETRI_PLACES=17, PETRI_TRANSITIONS=10} [2021-10-15 19:20:39,938 INFO L334 CegarLoopForPetriNet]: 7 programPoint places, 10 predicate places. [2021-10-15 19:20:39,938 INFO L470 AbstractCegarLoop]: Abstraction has has 17 places, 10 transitions, 50 flow [2021-10-15 19:20:39,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:39,939 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:20:39,939 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2021-10-15 19:20:39,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf271c5f-fd7d-46dc-86cc-17b12e2e88fa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:20:40,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf271c5f-fd7d-46dc-86cc-17b12e2e88fa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:20:40,153 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:20:40,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:20:40,154 INFO L82 PathProgramCache]: Analyzing trace with hash 492108272, now seen corresponding path program 3 times [2021-10-15 19:20:40,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:20:40,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020376702] [2021-10-15 19:20:40,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:20:40,155 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:20:40,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:40,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:40,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:20:40,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020376702] [2021-10-15 19:20:40,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020376702] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:20:40,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974417244] [2021-10-15 19:20:40,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:20:40,356 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:20:40,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf271c5f-fd7d-46dc-86cc-17b12e2e88fa/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:20:40,368 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf271c5f-fd7d-46dc-86cc-17b12e2e88fa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:20:40,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf271c5f-fd7d-46dc-86cc-17b12e2e88fa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 19:20:40,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-15 19:20:40,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:20:40,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 19:20:40,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:20:40,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-15 19:20:40,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974417244] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:20:40,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:20:40,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-10-15 19:20:40,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674045055] [2021-10-15 19:20:40,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:20:40,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:20:40,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:20:40,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-15 19:20:40,676 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 12 [2021-10-15 19:20:40,678 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 10 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:40,678 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:20:40,678 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 12 [2021-10-15 19:20:40,678 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:20:40,745 INFO L129 PetriNetUnfolder]: 1/8 cut-off events. [2021-10-15 19:20:40,746 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-10-15 19:20:40,746 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 8 events. 1/8 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 1 event pairs, 0 based on Foata normal form. 1/8 useless extension candidates. Maximal degree in co-relation 30. Up to 5 conditions per place. [2021-10-15 19:20:40,746 INFO L132 encePairwiseOnDemand]: 8/12 looper letters, 0 selfloop transitions, 0 changer transitions 8/8 dead transitions. [2021-10-15 19:20:40,746 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 8 transitions, 60 flow [2021-10-15 19:20:40,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:20:40,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:20:40,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 26 transitions. [2021-10-15 19:20:40,747 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2021-10-15 19:20:40,748 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 26 transitions. [2021-10-15 19:20:40,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 26 transitions. [2021-10-15 19:20:40,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:20:40,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 26 transitions. [2021-10-15 19:20:40,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:40,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:40,750 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:40,750 INFO L186 Difference]: Start difference. First operand has 17 places, 10 transitions, 50 flow. Second operand 5 states and 26 transitions. [2021-10-15 19:20:40,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 8 transitions, 60 flow [2021-10-15 19:20:40,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 8 transitions, 48 flow, removed 3 selfloop flow, removed 3 redundant places. [2021-10-15 19:20:40,751 INFO L242 Difference]: Finished difference. Result has 16 places, 0 transitions, 0 flow [2021-10-15 19:20:40,751 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=12, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=12, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=16, PETRI_TRANSITIONS=0} [2021-10-15 19:20:40,752 INFO L334 CegarLoopForPetriNet]: 7 programPoint places, 9 predicate places. [2021-10-15 19:20:40,752 INFO L470 AbstractCegarLoop]: Abstraction has has 16 places, 0 transitions, 0 flow [2021-10-15 19:20:40,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:40,754 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:20:40,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf271c5f-fd7d-46dc-86cc-17b12e2e88fa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-10-15 19:20:40,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf271c5f-fd7d-46dc-86cc-17b12e2e88fa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:20:40,973 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:20:40,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:20:40 BoogieIcfgContainer [2021-10-15 19:20:40,977 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:20:40,977 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:20:40,977 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:20:40,977 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:20:40,978 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:20:38" (3/4) ... [2021-10-15 19:20:40,980 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:20:40,989 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-15 19:20:40,989 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 19:20:40,989 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:20:40,989 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:20:41,018 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf271c5f-fd7d-46dc-86cc-17b12e2e88fa/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:20:41,018 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:20:41,020 INFO L168 Benchmark]: Toolchain (without parser) took 2907.36 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 53.0 MB in the beginning and 59.4 MB in the end (delta: -6.4 MB). Peak memory consumption was 10.0 MB. Max. memory is 16.1 GB. [2021-10-15 19:20:41,021 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 88.1 MB. Free memory was 61.6 MB in the beginning and 61.6 MB in the end (delta: 21.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:20:41,021 INFO L168 Benchmark]: CACSL2BoogieTranslator took 226.79 ms. Allocated memory is still 88.1 MB. Free memory was 52.8 MB in the beginning and 63.6 MB in the end (delta: -10.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:20:41,022 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.38 ms. Allocated memory is still 88.1 MB. Free memory was 63.6 MB in the beginning and 62.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:20:41,022 INFO L168 Benchmark]: Boogie Preprocessor took 15.65 ms. Allocated memory is still 88.1 MB. Free memory was 62.3 MB in the beginning and 61.3 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:20:41,023 INFO L168 Benchmark]: RCFGBuilder took 242.39 ms. Allocated memory is still 88.1 MB. Free memory was 61.3 MB in the beginning and 52.5 MB in the end (delta: 8.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:20:41,023 INFO L168 Benchmark]: TraceAbstraction took 2330.86 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 52.2 MB in the beginning and 61.3 MB in the end (delta: -9.1 MB). Peak memory consumption was 8.6 MB. Max. memory is 16.1 GB. [2021-10-15 19:20:41,024 INFO L168 Benchmark]: Witness Printer took 41.21 ms. Allocated memory is still 107.0 MB. Free memory was 61.3 MB in the beginning and 59.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:20:41,027 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 88.1 MB. Free memory was 61.6 MB in the beginning and 61.6 MB in the end (delta: 21.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 226.79 ms. Allocated memory is still 88.1 MB. Free memory was 52.8 MB in the beginning and 63.6 MB in the end (delta: -10.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 27.38 ms. Allocated memory is still 88.1 MB. Free memory was 63.6 MB in the beginning and 62.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 15.65 ms. Allocated memory is still 88.1 MB. Free memory was 62.3 MB in the beginning and 61.3 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 242.39 ms. Allocated memory is still 88.1 MB. Free memory was 61.3 MB in the beginning and 52.5 MB in the end (delta: 8.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2330.86 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 52.2 MB in the beginning and 61.3 MB in the end (delta: -9.1 MB). Peak memory consumption was 8.6 MB. Max. memory is 16.1 GB. * Witness Printer took 41.21 ms. Allocated memory is still 107.0 MB. Free memory was 61.3 MB in the beginning and 59.4 MB in the end (delta: 1.9 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: 7]: 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, 10 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 3.4ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2259.2ms, OverallIterations: 5, TraceHistogramMax: 3, EmptinessCheckTime: 0.0ms, AutomataDifference: 242.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 45.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 11 SDtfs, 3 SDslu, 2 SDs, 0 SdLazy, 40 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 46.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 162.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=4, InterpolantAutomatonStates: 19, 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: 29.2ms SsaConstructionTime, 168.5ms SatisfiabilityAnalysisTime, 867.4ms InterpolantComputationTime, 60 NumberOfCodeBlocks, 59 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 52 ConstructedInterpolants, 0 QuantifiedInterpolants, 146 SizeOfPredicates, 2 NumberOfNonLiveVariables, 154 ConjunctsInSsa, 25 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 6/20 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 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 19:20:41,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf271c5f-fd7d-46dc-86cc-17b12e2e88fa/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...