./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound1.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_261d8be5-e466-4783-a82a-65d6ae887555/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261d8be5-e466-4783-a82a-65d6ae887555/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_261d8be5-e466-4783-a82a-65d6ae887555/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261d8be5-e466-4783-a82a-65d6ae887555/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261d8be5-e466-4783-a82a-65d6ae887555/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_261d8be5-e466-4783-a82a-65d6ae887555/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 a8da7bb6495346e44a0ef3b7d50d5e0fbdae8843 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 19:32:14,413 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:32:14,416 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:32:14,478 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:32:14,479 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:32:14,483 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:32:14,485 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:32:14,488 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:32:14,491 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:32:14,499 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:32:14,500 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:32:14,502 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:32:14,503 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:32:14,506 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:32:14,508 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:32:14,513 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:32:14,514 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:32:14,515 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:32:14,517 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:32:14,519 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:32:14,521 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:32:14,522 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:32:14,523 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:32:14,524 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:32:14,528 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:32:14,528 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:32:14,529 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:32:14,530 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:32:14,530 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:32:14,531 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:32:14,532 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:32:14,532 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:32:14,533 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:32:14,534 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:32:14,535 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:32:14,535 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:32:14,536 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:32:14,536 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:32:14,537 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:32:14,538 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:32:14,538 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:32:14,539 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261d8be5-e466-4783-a82a-65d6ae887555/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:32:14,563 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:32:14,563 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:32:14,563 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:32:14,563 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:32:14,565 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:32:14,565 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:32:14,565 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:32:14,565 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:32:14,565 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:32:14,566 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:32:14,566 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:32:14,566 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:32:14,566 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:32:14,566 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:32:14,567 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:32:14,567 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:32:14,567 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:32:14,567 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:32:14,567 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:32:14,568 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:32:14,568 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:32:14,568 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:32:14,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:32:14,568 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:32:14,569 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:32:14,569 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:32:14,569 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:32:14,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:32:14,569 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:32:14,570 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:32:14,570 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:32:14,570 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:32:14,570 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_261d8be5-e466-4783-a82a-65d6ae887555/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261d8be5-e466-4783-a82a-65d6ae887555/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a8da7bb6495346e44a0ef3b7d50d5e0fbdae8843 [2021-10-15 19:32:14,813 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:32:14,847 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:32:14,849 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:32:14,850 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:32:14,851 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:32:14,852 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261d8be5-e466-4783-a82a-65d6ae887555/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound1.c [2021-10-15 19:32:14,924 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261d8be5-e466-4783-a82a-65d6ae887555/bin/uautomizer-hJ6jxDFKc3/data/5a3436332/ae01988a331a4fe390f1afefbe86b549/FLAG94c157dd4 [2021-10-15 19:32:15,413 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:32:15,414 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261d8be5-e466-4783-a82a-65d6ae887555/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound1.c [2021-10-15 19:32:15,421 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261d8be5-e466-4783-a82a-65d6ae887555/bin/uautomizer-hJ6jxDFKc3/data/5a3436332/ae01988a331a4fe390f1afefbe86b549/FLAG94c157dd4 [2021-10-15 19:32:15,781 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261d8be5-e466-4783-a82a-65d6ae887555/bin/uautomizer-hJ6jxDFKc3/data/5a3436332/ae01988a331a4fe390f1afefbe86b549 [2021-10-15 19:32:15,784 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:32:15,785 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:32:15,787 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:32:15,787 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:32:15,790 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:32:15,791 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:32:15" (1/1) ... [2021-10-15 19:32:15,792 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d73ff2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:15, skipping insertion in model container [2021-10-15 19:32:15,793 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:32:15" (1/1) ... [2021-10-15 19:32:15,804 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:32:15,818 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:32:15,984 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_261d8be5-e466-4783-a82a-65d6ae887555/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound1.c[520,533] [2021-10-15 19:32:15,998 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:32:16,007 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:32:16,029 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_261d8be5-e466-4783-a82a-65d6ae887555/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound1.c[520,533] [2021-10-15 19:32:16,043 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:32:16,058 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:32:16,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:16 WrapperNode [2021-10-15 19:32:16,060 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:32:16,061 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:32:16,062 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:32:16,062 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:32:16,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:16" (1/1) ... [2021-10-15 19:32:16,078 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:16" (1/1) ... [2021-10-15 19:32:16,105 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:32:16,106 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:32:16,106 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:32:16,106 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:32:16,114 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:16" (1/1) ... [2021-10-15 19:32:16,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:16" (1/1) ... [2021-10-15 19:32:16,125 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:16" (1/1) ... [2021-10-15 19:32:16,125 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:16" (1/1) ... [2021-10-15 19:32:16,129 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:16" (1/1) ... [2021-10-15 19:32:16,136 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:16" (1/1) ... [2021-10-15 19:32:16,146 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:16" (1/1) ... [2021-10-15 19:32:16,148 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:32:16,149 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:32:16,149 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:32:16,149 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:32:16,150 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:16" (1/1) ... [2021-10-15 19:32:16,164 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:32:16,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261d8be5-e466-4783-a82a-65d6ae887555/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:32:16,193 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261d8be5-e466-4783-a82a-65d6ae887555/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:32:16,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261d8be5-e466-4783-a82a-65d6ae887555/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:32:16,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:32:16,249 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:32:16,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:32:16,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:32:16,490 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:32:16,490 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-10-15 19:32:16,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:32:16 BoogieIcfgContainer [2021-10-15 19:32:16,492 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:32:16,493 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:32:16,493 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:32:16,497 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:32:16,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:32:15" (1/3) ... [2021-10-15 19:32:16,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60857c84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:32:16, skipping insertion in model container [2021-10-15 19:32:16,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:16" (2/3) ... [2021-10-15 19:32:16,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60857c84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:32:16, skipping insertion in model container [2021-10-15 19:32:16,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:32:16" (3/3) ... [2021-10-15 19:32:16,500 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound1.c [2021-10-15 19:32:16,505 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:32:16,506 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-10-15 19:32:16,561 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:32:16,580 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 19:32:16,581 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-10-15 19:32:16,593 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 32 places, 40 transitions, 80 flow [2021-10-15 19:32:16,622 INFO L129 PetriNetUnfolder]: 9/40 cut-off events. [2021-10-15 19:32:16,622 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:32:16,624 INFO L84 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 40 events. 9/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 78 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-10-15 19:32:16,624 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 40 transitions, 80 flow [2021-10-15 19:32:16,634 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 35 transitions, 70 flow [2021-10-15 19:32:16,637 INFO L129 PetriNetUnfolder]: 3/13 cut-off events. [2021-10-15 19:32:16,637 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:32:16,637 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:32:16,638 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-15 19:32:16,639 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:32:16,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:32:16,644 INFO L82 PathProgramCache]: Analyzing trace with hash 890922791, now seen corresponding path program 1 times [2021-10-15 19:32:16,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:32:16,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532868788] [2021-10-15 19:32:16,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:32:16,655 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:32:16,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:32:16,862 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 19:32:16,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:32:16,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532868788] [2021-10-15 19:32:16,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532868788] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:32:16,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:32:16,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:32:16,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951119810] [2021-10-15 19:32:16,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-15 19:32:16,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:32:16,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-15 19:32:16,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-15 19:32:16,899 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 40 [2021-10-15 19:32:16,904 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 35 transitions, 70 flow. Second operand has 2 states, 2 states have (on average 33.5) internal successors, (67), 2 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:16,904 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:32:16,904 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 40 [2021-10-15 19:32:16,906 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:32:16,915 INFO L129 PetriNetUnfolder]: 2/29 cut-off events. [2021-10-15 19:32:16,915 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:32:16,917 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 29 events. 2/29 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 57 event pairs, 0 based on Foata normal form. 6/28 useless extension candidates. Maximal degree in co-relation 29. Up to 2 conditions per place. [2021-10-15 19:32:16,918 INFO L132 encePairwiseOnDemand]: 34/40 looper letters, 0 selfloop transitions, 0 changer transitions 0/29 dead transitions. [2021-10-15 19:32:16,918 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 29 transitions, 58 flow [2021-10-15 19:32:16,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-15 19:32:16,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-10-15 19:32:16,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 72 transitions. [2021-10-15 19:32:16,930 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9 [2021-10-15 19:32:16,930 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 72 transitions. [2021-10-15 19:32:16,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 72 transitions. [2021-10-15 19:32:16,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:32:16,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 72 transitions. [2021-10-15 19:32:16,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 36.0) internal successors, (72), 2 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 19:32:16,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:16,944 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:16,946 INFO L186 Difference]: Start difference. First operand has 28 places, 35 transitions, 70 flow. Second operand 2 states and 72 transitions. [2021-10-15 19:32:16,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 29 transitions, 58 flow [2021-10-15 19:32:16,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 29 transitions, 58 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:32:16,956 INFO L242 Difference]: Finished difference. Result has 29 places, 29 transitions, 58 flow [2021-10-15 19:32:16,958 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=58, PETRI_PLACES=29, PETRI_TRANSITIONS=29} [2021-10-15 19:32:16,959 INFO L334 CegarLoopForPetriNet]: 28 programPoint places, 1 predicate places. [2021-10-15 19:32:16,959 INFO L470 AbstractCegarLoop]: Abstraction has has 29 places, 29 transitions, 58 flow [2021-10-15 19:32:16,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 33.5) internal successors, (67), 2 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:16,960 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:32:16,960 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-15 19:32:16,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:32:16,961 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:32:16,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:32:16,963 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2021-10-15 19:32:16,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:32:16,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462204003] [2021-10-15 19:32:16,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:32:16,964 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:32:17,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:32:17,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:32:17,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:32:17,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462204003] [2021-10-15 19:32:17,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462204003] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:32:17,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:32:17,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:32:17,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260305393] [2021-10-15 19:32:17,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:32:17,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:32:17,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:32:17,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:32:17,099 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2021-10-15 19:32:17,099 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 29 transitions, 58 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:17,099 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:32:17,099 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2021-10-15 19:32:17,100 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:32:17,223 INFO L129 PetriNetUnfolder]: 3/29 cut-off events. [2021-10-15 19:32:17,223 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:32:17,224 INFO L84 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 29 events. 3/29 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 50 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 48. Up to 10 conditions per place. [2021-10-15 19:32:17,224 INFO L132 encePairwiseOnDemand]: 28/40 looper letters, 9 selfloop transitions, 10 changer transitions 0/27 dead transitions. [2021-10-15 19:32:17,225 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 27 transitions, 92 flow [2021-10-15 19:32:17,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:32:17,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:32:17,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2021-10-15 19:32:17,227 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.45625 [2021-10-15 19:32:17,227 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 73 transitions. [2021-10-15 19:32:17,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 73 transitions. [2021-10-15 19:32:17,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:32:17,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 73 transitions. [2021-10-15 19:32:17,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 18.25) internal successors, (73), 4 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 19:32:17,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 40.0) internal successors, (200), 5 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:17,231 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 40.0) internal successors, (200), 5 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:17,232 INFO L186 Difference]: Start difference. First operand has 29 places, 29 transitions, 58 flow. Second operand 4 states and 73 transitions. [2021-10-15 19:32:17,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 27 transitions, 92 flow [2021-10-15 19:32:17,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 27 transitions, 92 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:32:17,235 INFO L242 Difference]: Finished difference. Result has 29 places, 27 transitions, 88 flow [2021-10-15 19:32:17,235 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=88, PETRI_PLACES=29, PETRI_TRANSITIONS=27} [2021-10-15 19:32:17,236 INFO L334 CegarLoopForPetriNet]: 28 programPoint places, 1 predicate places. [2021-10-15 19:32:17,236 INFO L470 AbstractCegarLoop]: Abstraction has has 29 places, 27 transitions, 88 flow [2021-10-15 19:32:17,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:17,236 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:32:17,237 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:32:17,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:32:17,237 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:32:17,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:32:17,238 INFO L82 PathProgramCache]: Analyzing trace with hash 179657965, now seen corresponding path program 1 times [2021-10-15 19:32:17,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:32:17,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586020634] [2021-10-15 19:32:17,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:32:17,239 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:32:17,254 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:32:17,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [482818501] [2021-10-15 19:32:17,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:32:17,255 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:32:17,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261d8be5-e466-4783-a82a-65d6ae887555/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:32:17,257 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261d8be5-e466-4783-a82a-65d6ae887555/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:32:17,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261d8be5-e466-4783-a82a-65d6ae887555/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:32:17,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:32:17,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 19:32:17,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:32:17,489 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 19:32:17,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:32:17,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586020634] [2021-10-15 19:32:17,490 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:32:17,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482818501] [2021-10-15 19:32:17,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482818501] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:32:17,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:32:17,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:32:17,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218864138] [2021-10-15 19:32:17,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:32:17,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:32:17,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:32:17,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:32:17,494 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2021-10-15 19:32:17,495 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 27 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 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 19:32:17,495 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:32:17,495 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2021-10-15 19:32:17,495 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:32:17,616 INFO L129 PetriNetUnfolder]: 3/45 cut-off events. [2021-10-15 19:32:17,616 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2021-10-15 19:32:17,617 INFO L84 FinitePrefix]: Finished finitePrefix Result has 112 conditions, 45 events. 3/45 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 2/45 useless extension candidates. Maximal degree in co-relation 107. Up to 19 conditions per place. [2021-10-15 19:32:17,617 INFO L132 encePairwiseOnDemand]: 32/40 looper letters, 28 selfloop transitions, 6 changer transitions 0/41 dead transitions. [2021-10-15 19:32:17,617 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 41 transitions, 207 flow [2021-10-15 19:32:17,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:32:17,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:32:17,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2021-10-15 19:32:17,620 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.51875 [2021-10-15 19:32:17,620 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 83 transitions. [2021-10-15 19:32:17,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 83 transitions. [2021-10-15 19:32:17,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:32:17,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 83 transitions. [2021-10-15 19:32:17,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:17,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 40.0) internal successors, (200), 5 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:17,627 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 40.0) internal successors, (200), 5 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:17,627 INFO L186 Difference]: Start difference. First operand has 29 places, 27 transitions, 88 flow. Second operand 4 states and 83 transitions. [2021-10-15 19:32:17,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 41 transitions, 207 flow [2021-10-15 19:32:17,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 41 transitions, 190 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:32:17,637 INFO L242 Difference]: Finished difference. Result has 32 places, 32 transitions, 132 flow [2021-10-15 19:32:17,638 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=132, PETRI_PLACES=32, PETRI_TRANSITIONS=32} [2021-10-15 19:32:17,638 INFO L334 CegarLoopForPetriNet]: 28 programPoint places, 4 predicate places. [2021-10-15 19:32:17,638 INFO L470 AbstractCegarLoop]: Abstraction has has 32 places, 32 transitions, 132 flow [2021-10-15 19:32:17,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 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 19:32:17,638 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:32:17,639 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:32:17,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261d8be5-e466-4783-a82a-65d6ae887555/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:32:17,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261d8be5-e466-4783-a82a-65d6ae887555/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:32:17,864 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:32:17,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:32:17,864 INFO L82 PathProgramCache]: Analyzing trace with hash 852768432, now seen corresponding path program 1 times [2021-10-15 19:32:17,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:32:17,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280665139] [2021-10-15 19:32:17,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:32:17,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:32:17,883 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:32:17,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1125612367] [2021-10-15 19:32:17,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:32:17,884 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:32:17,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261d8be5-e466-4783-a82a-65d6ae887555/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:32:17,885 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261d8be5-e466-4783-a82a-65d6ae887555/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:32:17,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261d8be5-e466-4783-a82a-65d6ae887555/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:32:17,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:32:17,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 19:32:17,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:32:18,074 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 19:32:18,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:32:18,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280665139] [2021-10-15 19:32:18,075 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:32:18,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125612367] [2021-10-15 19:32:18,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125612367] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:32:18,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:32:18,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:32:18,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875606824] [2021-10-15 19:32:18,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:32:18,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:32:18,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:32:18,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:32:18,078 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2021-10-15 19:32:18,079 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 32 transitions, 132 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:18,079 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:32:18,079 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2021-10-15 19:32:18,079 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:32:18,166 INFO L129 PetriNetUnfolder]: 4/45 cut-off events. [2021-10-15 19:32:18,166 INFO L130 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2021-10-15 19:32:18,167 INFO L84 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 45 events. 4/45 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 60 event pairs, 0 based on Foata normal form. 2/47 useless extension candidates. Maximal degree in co-relation 119. Up to 20 conditions per place. [2021-10-15 19:32:18,167 INFO L132 encePairwiseOnDemand]: 32/40 looper letters, 22 selfloop transitions, 5 changer transitions 7/41 dead transitions. [2021-10-15 19:32:18,167 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 41 transitions, 230 flow [2021-10-15 19:32:18,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:32:18,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:32:18,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2021-10-15 19:32:18,192 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.48 [2021-10-15 19:32:18,192 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 96 transitions. [2021-10-15 19:32:18,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 96 transitions. [2021-10-15 19:32:18,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:32:18,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 96 transitions. [2021-10-15 19:32:18,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:18,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:18,196 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:18,196 INFO L186 Difference]: Start difference. First operand has 32 places, 32 transitions, 132 flow. Second operand 5 states and 96 transitions. [2021-10-15 19:32:18,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 41 transitions, 230 flow [2021-10-15 19:32:18,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 41 transitions, 228 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:32:18,200 INFO L242 Difference]: Finished difference. Result has 37 places, 31 transitions, 143 flow [2021-10-15 19:32:18,200 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=143, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2021-10-15 19:32:18,215 INFO L334 CegarLoopForPetriNet]: 28 programPoint places, 9 predicate places. [2021-10-15 19:32:18,215 INFO L470 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 143 flow [2021-10-15 19:32:18,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:18,216 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:32:18,216 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:32:18,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261d8be5-e466-4783-a82a-65d6ae887555/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:32:18,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261d8be5-e466-4783-a82a-65d6ae887555/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:32:18,417 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:32:18,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:32:18,418 INFO L82 PathProgramCache]: Analyzing trace with hash -677045505, now seen corresponding path program 1 times [2021-10-15 19:32:18,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:32:18,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936895159] [2021-10-15 19:32:18,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:32:18,419 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:32:18,430 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:32:18,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1229360464] [2021-10-15 19:32:18,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:32:18,431 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:32:18,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261d8be5-e466-4783-a82a-65d6ae887555/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:32:18,440 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261d8be5-e466-4783-a82a-65d6ae887555/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:32:18,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261d8be5-e466-4783-a82a-65d6ae887555/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 19:32:18,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:32:18,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-15 19:32:18,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:32:18,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:32:18,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:32:18,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936895159] [2021-10-15 19:32:18,643 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:32:18,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229360464] [2021-10-15 19:32:18,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229360464] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:32:18,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:32:18,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-10-15 19:32:18,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479523625] [2021-10-15 19:32:18,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:32:18,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:32:18,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:32:18,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:32:18,647 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 40 [2021-10-15 19:32:18,647 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 143 flow. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:18,647 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:32:18,648 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 40 [2021-10-15 19:32:18,648 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:32:18,671 INFO L129 PetriNetUnfolder]: 0/23 cut-off events. [2021-10-15 19:32:18,671 INFO L130 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2021-10-15 19:32:18,671 INFO L84 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 23 events. 0/23 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 5 event pairs, 0 based on Foata normal form. 1/24 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2021-10-15 19:32:18,672 INFO L132 encePairwiseOnDemand]: 36/40 looper letters, 2 selfloop transitions, 4 changer transitions 2/23 dead transitions. [2021-10-15 19:32:18,672 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 23 transitions, 112 flow [2021-10-15 19:32:18,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:32:18,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:32:18,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2021-10-15 19:32:18,674 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.74 [2021-10-15 19:32:18,674 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 148 transitions. [2021-10-15 19:32:18,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 148 transitions. [2021-10-15 19:32:18,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:32:18,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 148 transitions. [2021-10-15 19:32:18,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:18,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:18,680 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:18,680 INFO L186 Difference]: Start difference. First operand has 37 places, 31 transitions, 143 flow. Second operand 5 states and 148 transitions. [2021-10-15 19:32:18,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 23 transitions, 112 flow [2021-10-15 19:32:18,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 23 transitions, 71 flow, removed 5 selfloop flow, removed 10 redundant places. [2021-10-15 19:32:18,684 INFO L242 Difference]: Finished difference. Result has 27 places, 21 transitions, 61 flow [2021-10-15 19:32:18,685 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=61, PETRI_PLACES=27, PETRI_TRANSITIONS=21} [2021-10-15 19:32:18,685 INFO L334 CegarLoopForPetriNet]: 28 programPoint places, -1 predicate places. [2021-10-15 19:32:18,685 INFO L470 AbstractCegarLoop]: Abstraction has has 27 places, 21 transitions, 61 flow [2021-10-15 19:32:18,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:18,687 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:32:18,688 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:32:18,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261d8be5-e466-4783-a82a-65d6ae887555/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 19:32:18,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261d8be5-e466-4783-a82a-65d6ae887555/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:32:18,912 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:32:18,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:32:18,912 INFO L82 PathProgramCache]: Analyzing trace with hash 460813570, now seen corresponding path program 1 times [2021-10-15 19:32:18,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:32:18,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252702017] [2021-10-15 19:32:18,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:32:18,913 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:32:18,924 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:32:18,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [648747186] [2021-10-15 19:32:18,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:32:18,925 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:32:18,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261d8be5-e466-4783-a82a-65d6ae887555/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:32:18,930 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261d8be5-e466-4783-a82a-65d6ae887555/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:32:18,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261d8be5-e466-4783-a82a-65d6ae887555/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 19:32:19,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:32:19,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-15 19:32:19,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:32:19,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:32:19,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:32:19,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252702017] [2021-10-15 19:32:19,195 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:32:19,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648747186] [2021-10-15 19:32:19,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648747186] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:32:19,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:32:19,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-15 19:32:19,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805643879] [2021-10-15 19:32:19,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:32:19,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:32:19,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:32:19,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:32:19,199 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2021-10-15 19:32:19,199 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 21 transitions, 61 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 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 19:32:19,200 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:32:19,200 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2021-10-15 19:32:19,200 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:32:19,259 INFO L129 PetriNetUnfolder]: 0/19 cut-off events. [2021-10-15 19:32:19,260 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-15 19:32:19,260 INFO L84 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 19 events. 0/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 0 event pairs, 0 based on Foata normal form. 1/20 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2021-10-15 19:32:19,260 INFO L132 encePairwiseOnDemand]: 33/40 looper letters, 8 selfloop transitions, 6 changer transitions 0/19 dead transitions. [2021-10-15 19:32:19,261 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 19 transitions, 85 flow [2021-10-15 19:32:19,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:32:19,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:32:19,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 87 transitions. [2021-10-15 19:32:19,263 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3625 [2021-10-15 19:32:19,263 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 87 transitions. [2021-10-15 19:32:19,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 87 transitions. [2021-10-15 19:32:19,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:32:19,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 87 transitions. [2021-10-15 19:32:19,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:19,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 40.0) internal successors, (280), 7 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:19,266 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 40.0) internal successors, (280), 7 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:19,267 INFO L186 Difference]: Start difference. First operand has 27 places, 21 transitions, 61 flow. Second operand 6 states and 87 transitions. [2021-10-15 19:32:19,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 19 transitions, 85 flow [2021-10-15 19:32:19,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 19 transitions, 82 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:32:19,269 INFO L242 Difference]: Finished difference. Result has 28 places, 19 transitions, 66 flow [2021-10-15 19:32:19,269 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=66, PETRI_PLACES=28, PETRI_TRANSITIONS=19} [2021-10-15 19:32:19,270 INFO L334 CegarLoopForPetriNet]: 28 programPoint places, 0 predicate places. [2021-10-15 19:32:19,270 INFO L470 AbstractCegarLoop]: Abstraction has has 28 places, 19 transitions, 66 flow [2021-10-15 19:32:19,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 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 19:32:19,271 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:32:19,271 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:32:19,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261d8be5-e466-4783-a82a-65d6ae887555/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 19:32:19,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261d8be5-e466-4783-a82a-65d6ae887555/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:32:19,490 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:32:19,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:32:19,491 INFO L82 PathProgramCache]: Analyzing trace with hash 460366501, now seen corresponding path program 1 times [2021-10-15 19:32:19,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:32:19,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297501666] [2021-10-15 19:32:19,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:32:19,492 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:32:19,502 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:32:19,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [595233518] [2021-10-15 19:32:19,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:32:19,503 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:32:19,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261d8be5-e466-4783-a82a-65d6ae887555/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:32:19,504 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261d8be5-e466-4783-a82a-65d6ae887555/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:32:19,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261d8be5-e466-4783-a82a-65d6ae887555/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 19:32:19,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:32:19,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-15 19:32:19,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:32:19,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:32:19,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:32:19,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297501666] [2021-10-15 19:32:19,807 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:32:19,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595233518] [2021-10-15 19:32:19,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595233518] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:32:19,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:32:19,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-15 19:32:19,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553678319] [2021-10-15 19:32:19,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:32:19,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:32:19,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:32:19,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:32:19,812 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2021-10-15 19:32:19,812 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 19 transitions, 66 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:19,812 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:32:19,813 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2021-10-15 19:32:19,813 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:32:19,876 INFO L129 PetriNetUnfolder]: 0/17 cut-off events. [2021-10-15 19:32:19,876 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-10-15 19:32:19,877 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 17 events. 0/17 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 0 event pairs, 0 based on Foata normal form. 1/18 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2021-10-15 19:32:19,879 INFO L132 encePairwiseOnDemand]: 34/40 looper letters, 0 selfloop transitions, 0 changer transitions 17/17 dead transitions. [2021-10-15 19:32:19,881 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 17 transitions, 88 flow [2021-10-15 19:32:19,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:32:19,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:32:19,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 86 transitions. [2021-10-15 19:32:19,888 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.35833333333333334 [2021-10-15 19:32:19,888 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 86 transitions. [2021-10-15 19:32:19,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 86 transitions. [2021-10-15 19:32:19,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:32:19,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 86 transitions. [2021-10-15 19:32:19,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:19,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 40.0) internal successors, (280), 7 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:19,891 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 40.0) internal successors, (280), 7 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:19,891 INFO L186 Difference]: Start difference. First operand has 28 places, 19 transitions, 66 flow. Second operand 6 states and 86 transitions. [2021-10-15 19:32:19,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 17 transitions, 88 flow [2021-10-15 19:32:19,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 17 transitions, 69 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-10-15 19:32:19,892 INFO L242 Difference]: Finished difference. Result has 26 places, 0 transitions, 0 flow [2021-10-15 19:32:19,893 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=43, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=26, PETRI_TRANSITIONS=0} [2021-10-15 19:32:19,893 INFO L334 CegarLoopForPetriNet]: 28 programPoint places, -2 predicate places. [2021-10-15 19:32:19,893 INFO L470 AbstractCegarLoop]: Abstraction has has 26 places, 0 transitions, 0 flow [2021-10-15 19:32:19,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:19,896 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:32:19,896 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:32:19,901 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:32:19,902 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:32:19,902 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:32:19,902 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:32:19,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261d8be5-e466-4783-a82a-65d6ae887555/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-15 19:32:20,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261d8be5-e466-4783-a82a-65d6ae887555/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-15 19:32:20,132 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:32:20,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:32:20 BoogieIcfgContainer [2021-10-15 19:32:20,136 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:32:20,137 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:32:20,137 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:32:20,137 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:32:20,137 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:32:16" (3/4) ... [2021-10-15 19:32:20,139 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:32:20,148 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-10-15 19:32:20,148 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 19:32:20,148 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:32:20,149 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:32:20,196 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261d8be5-e466-4783-a82a-65d6ae887555/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:32:20,197 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:32:20,199 INFO L168 Benchmark]: Toolchain (without parser) took 4412.31 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 73.6 MB in the beginning and 102.5 MB in the end (delta: -28.9 MB). Peak memory consumption was 9.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:32:20,199 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 81.8 MB. Free memory is still 47.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:32:20,200 INFO L168 Benchmark]: CACSL2BoogieTranslator took 273.42 ms. Allocated memory is still 104.9 MB. Free memory was 73.4 MB in the beginning and 63.4 MB in the end (delta: 10.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:32:20,200 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.12 ms. Allocated memory is still 104.9 MB. Free memory was 63.4 MB in the beginning and 61.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:32:20,201 INFO L168 Benchmark]: Boogie Preprocessor took 42.18 ms. Allocated memory is still 104.9 MB. Free memory was 61.9 MB in the beginning and 60.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:32:20,202 INFO L168 Benchmark]: RCFGBuilder took 342.74 ms. Allocated memory is still 104.9 MB. Free memory was 60.8 MB in the beginning and 50.2 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:32:20,202 INFO L168 Benchmark]: TraceAbstraction took 3642.75 ms. Allocated memory is still 104.9 MB. Free memory was 49.8 MB in the beginning and 69.4 MB in the end (delta: -19.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:32:20,203 INFO L168 Benchmark]: Witness Printer took 60.45 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 69.4 MB in the beginning and 102.5 MB in the end (delta: -33.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:32:20,206 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 81.8 MB. Free memory is still 47.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 273.42 ms. Allocated memory is still 104.9 MB. Free memory was 73.4 MB in the beginning and 63.4 MB in the end (delta: 10.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 44.12 ms. Allocated memory is still 104.9 MB. Free memory was 63.4 MB in the beginning and 61.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 42.18 ms. Allocated memory is still 104.9 MB. Free memory was 61.9 MB in the beginning and 60.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 342.74 ms. Allocated memory is still 104.9 MB. Free memory was 60.8 MB in the beginning and 50.2 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3642.75 ms. Allocated memory is still 104.9 MB. Free memory was 49.8 MB in the beginning and 69.4 MB in the end (delta: -19.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 60.45 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 69.4 MB in the beginning and 102.5 MB in the end (delta: -33.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 14]: 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, 32 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 2.9ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 3576.1ms, OverallIterations: 7, TraceHistogramMax: 2, EmptinessCheckTime: 0.0ms, AutomataDifference: 684.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 53.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 38 SDtfs, 46 SDslu, 33 SDs, 0 SdLazy, 150 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 234.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 79 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 163.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=143occurred in iteration=4, InterpolantAutomatonStates: 32, 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: 63.0ms SsaConstructionTime, 168.9ms SatisfiabilityAnalysisTime, 989.4ms InterpolantComputationTime, 82 NumberOfCodeBlocks, 82 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 75 ConstructedInterpolants, 0 QuantifiedInterpolants, 386 SizeOfPredicates, 14 NumberOfNonLiveVariables, 391 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 7 InterpolantComputations, 4 PerfectInterpolantSequences, 4/9 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 6 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 19:32:20,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261d8be5-e466-4783-a82a-65d6ae887555/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...