./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98b0d1-0b05-4442-bd17-228e95787c1d/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98b0d1-0b05-4442-bd17-228e95787c1d/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_2a98b0d1-0b05-4442-bd17-228e95787c1d/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98b0d1-0b05-4442-bd17-228e95787c1d/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98b0d1-0b05-4442-bd17-228e95787c1d/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_2a98b0d1-0b05-4442-bd17-228e95787c1d/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 d1adf19ba27684d12b58eec08a023abe41487958 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 20:09:55,465 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 20:09:55,467 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 20:09:55,498 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 20:09:55,499 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 20:09:55,500 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 20:09:55,502 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 20:09:55,505 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 20:09:55,507 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 20:09:55,509 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 20:09:55,510 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 20:09:55,512 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 20:09:55,513 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 20:09:55,514 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 20:09:55,516 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 20:09:55,518 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 20:09:55,519 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 20:09:55,521 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 20:09:55,523 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 20:09:55,526 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 20:09:55,528 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 20:09:55,530 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 20:09:55,531 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 20:09:55,533 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 20:09:55,537 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 20:09:55,537 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 20:09:55,538 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 20:09:55,539 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 20:09:55,540 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 20:09:55,541 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 20:09:55,541 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 20:09:55,543 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 20:09:55,544 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 20:09:55,545 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 20:09:55,546 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 20:09:55,547 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 20:09:55,548 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 20:09:55,548 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 20:09:55,549 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 20:09:55,550 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 20:09:55,551 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 20:09:55,552 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98b0d1-0b05-4442-bd17-228e95787c1d/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 20:09:55,580 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 20:09:55,580 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 20:09:55,581 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 20:09:55,584 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 20:09:55,585 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 20:09:55,586 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 20:09:55,586 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 20:09:55,586 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 20:09:55,587 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 20:09:55,587 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 20:09:55,587 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 20:09:55,587 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 20:09:55,587 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 20:09:55,588 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 20:09:55,588 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 20:09:55,588 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 20:09:55,588 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 20:09:55,589 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 20:09:55,589 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 20:09:55,589 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 20:09:55,589 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 20:09:55,590 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 20:09:55,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:09:55,590 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 20:09:55,590 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 20:09:55,591 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 20:09:55,591 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 20:09:55,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 20:09:55,591 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 20:09:55,592 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 20:09:55,592 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 20:09:55,592 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 20:09:55,592 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_2a98b0d1-0b05-4442-bd17-228e95787c1d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98b0d1-0b05-4442-bd17-228e95787c1d/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d1adf19ba27684d12b58eec08a023abe41487958 [2021-10-15 20:09:55,842 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 20:09:55,864 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 20:09:55,867 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 20:09:55,869 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 20:09:55,869 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 20:09:55,870 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98b0d1-0b05-4442-bd17-228e95787c1d/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound10.c [2021-10-15 20:09:55,946 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98b0d1-0b05-4442-bd17-228e95787c1d/bin/uautomizer-hJ6jxDFKc3/data/9611aa743/66fbf556b75f4d5e829926aab5963906/FLAG910ba9dd6 [2021-10-15 20:09:56,342 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 20:09:56,343 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98b0d1-0b05-4442-bd17-228e95787c1d/sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound10.c [2021-10-15 20:09:56,348 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98b0d1-0b05-4442-bd17-228e95787c1d/bin/uautomizer-hJ6jxDFKc3/data/9611aa743/66fbf556b75f4d5e829926aab5963906/FLAG910ba9dd6 [2021-10-15 20:09:56,751 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98b0d1-0b05-4442-bd17-228e95787c1d/bin/uautomizer-hJ6jxDFKc3/data/9611aa743/66fbf556b75f4d5e829926aab5963906 [2021-10-15 20:09:56,755 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 20:09:56,757 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 20:09:56,759 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 20:09:56,759 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 20:09:56,770 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 20:09:56,770 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:09:56" (1/1) ... [2021-10-15 20:09:56,771 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3128861 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:56, skipping insertion in model container [2021-10-15 20:09:56,772 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:09:56" (1/1) ... [2021-10-15 20:09:56,779 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 20:09:56,792 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 20:09:56,960 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_2a98b0d1-0b05-4442-bd17-228e95787c1d/sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound10.c[525,538] [2021-10-15 20:09:56,974 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:09:56,981 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 20:09:56,991 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_2a98b0d1-0b05-4442-bd17-228e95787c1d/sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound10.c[525,538] [2021-10-15 20:09:56,996 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:09:57,009 INFO L208 MainTranslator]: Completed translation [2021-10-15 20:09:57,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:57 WrapperNode [2021-10-15 20:09:57,009 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 20:09:57,010 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 20:09:57,010 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 20:09:57,011 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 20:09:57,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:57" (1/1) ... [2021-10-15 20:09:57,025 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:57" (1/1) ... [2021-10-15 20:09:57,043 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 20:09:57,044 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 20:09:57,044 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 20:09:57,045 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 20:09:57,054 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:57" (1/1) ... [2021-10-15 20:09:57,054 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:57" (1/1) ... [2021-10-15 20:09:57,056 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:57" (1/1) ... [2021-10-15 20:09:57,056 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:57" (1/1) ... [2021-10-15 20:09:57,060 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:57" (1/1) ... [2021-10-15 20:09:57,063 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:57" (1/1) ... [2021-10-15 20:09:57,065 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:57" (1/1) ... [2021-10-15 20:09:57,066 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 20:09:57,067 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 20:09:57,067 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 20:09:57,067 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 20:09:57,068 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:57" (1/1) ... [2021-10-15 20:09:57,085 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:09:57,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98b0d1-0b05-4442-bd17-228e95787c1d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:09:57,111 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98b0d1-0b05-4442-bd17-228e95787c1d/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 20:09:57,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98b0d1-0b05-4442-bd17-228e95787c1d/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 20:09:57,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 20:09:57,160 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 20:09:57,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 20:09:57,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 20:09:57,379 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 20:09:57,379 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-10-15 20:09:57,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:09:57 BoogieIcfgContainer [2021-10-15 20:09:57,381 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 20:09:57,383 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 20:09:57,383 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 20:09:57,386 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 20:09:57,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 08:09:56" (1/3) ... [2021-10-15 20:09:57,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3697aae9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:09:57, skipping insertion in model container [2021-10-15 20:09:57,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:57" (2/3) ... [2021-10-15 20:09:57,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3697aae9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:09:57, skipping insertion in model container [2021-10-15 20:09:57,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:09:57" (3/3) ... [2021-10-15 20:09:57,389 INFO L111 eAbstractionObserver]: Analyzing ICFG geo2-ll_unwindbound10.c [2021-10-15 20:09:57,395 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 20:09:57,395 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-15 20:09:57,477 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 20:09:57,499 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-15 20:09:57,513 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-15 20:09:57,523 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 16 places, 20 transitions, 40 flow [2021-10-15 20:09:57,545 INFO L129 PetriNetUnfolder]: 5/20 cut-off events. [2021-10-15 20:09:57,546 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:09:57,547 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21 conditions, 20 events. 5/20 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 26 event pairs, 0 based on Foata normal form. 0/13 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-10-15 20:09:57,548 INFO L82 GeneralOperation]: Start removeDead. Operand has 16 places, 20 transitions, 40 flow [2021-10-15 20:09:57,552 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 12 places, 15 transitions, 30 flow [2021-10-15 20:09:57,555 INFO L129 PetriNetUnfolder]: 4/13 cut-off events. [2021-10-15 20:09:57,555 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:09:57,556 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:09:57,556 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-15 20:09:57,557 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:09:57,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:09:57,563 INFO L82 PathProgramCache]: Analyzing trace with hash 890245543, now seen corresponding path program 1 times [2021-10-15 20:09:57,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:09:57,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940434346] [2021-10-15 20:09:57,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:09:57,576 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:09:57,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:57,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:09:57,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:09:57,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940434346] [2021-10-15 20:09:57,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940434346] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:09:57,738 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:09:57,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 20:09:57,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826861762] [2021-10-15 20:09:57,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-15 20:09:57,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:09:57,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-15 20:09:57,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-15 20:09:57,768 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 20 [2021-10-15 20:09:57,771 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 15 transitions, 30 flow. Second operand has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:09:57,771 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:09:57,771 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 20 [2021-10-15 20:09:57,773 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:09:57,782 INFO L129 PetriNetUnfolder]: 2/13 cut-off events. [2021-10-15 20:09:57,782 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:09:57,783 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15 conditions, 13 events. 2/13 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 12 event pairs, 0 based on Foata normal form. 2/12 useless extension candidates. Maximal degree in co-relation 13. Up to 2 conditions per place. [2021-10-15 20:09:57,784 INFO L132 encePairwiseOnDemand]: 18/20 looper letters, 0 selfloop transitions, 0 changer transitions 0/13 dead transitions. [2021-10-15 20:09:57,784 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 13 places, 13 transitions, 26 flow [2021-10-15 20:09:57,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-15 20:09:57,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-10-15 20:09:57,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 36 transitions. [2021-10-15 20:09:57,796 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9 [2021-10-15 20:09:57,796 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 36 transitions. [2021-10-15 20:09:57,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 36 transitions. [2021-10-15 20:09:57,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:09:57,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 36 transitions. [2021-10-15 20:09:57,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:09:57,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:09:57,804 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:09:57,806 INFO L186 Difference]: Start difference. First operand has 12 places, 15 transitions, 30 flow. Second operand 2 states and 36 transitions. [2021-10-15 20:09:57,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 13 places, 13 transitions, 26 flow [2021-10-15 20:09:57,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 13 places, 13 transitions, 26 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:09:57,810 INFO L242 Difference]: Finished difference. Result has 13 places, 13 transitions, 26 flow [2021-10-15 20:09:57,812 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=12, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=26, PETRI_PLACES=13, PETRI_TRANSITIONS=13} [2021-10-15 20:09:57,813 INFO L334 CegarLoopForPetriNet]: 12 programPoint places, 1 predicate places. [2021-10-15 20:09:57,813 INFO L470 AbstractCegarLoop]: Abstraction has has 13 places, 13 transitions, 26 flow [2021-10-15 20:09:57,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:09:57,814 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:09:57,814 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-15 20:09:57,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 20:09:57,815 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:09:57,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:09:57,815 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2021-10-15 20:09:57,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:09:57,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840224602] [2021-10-15 20:09:57,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:09:57,816 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:09:57,837 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:09:57,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [898259263] [2021-10-15 20:09:57,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:09:57,838 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:09:57,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98b0d1-0b05-4442-bd17-228e95787c1d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:09:57,855 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98b0d1-0b05-4442-bd17-228e95787c1d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:09:57,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98b0d1-0b05-4442-bd17-228e95787c1d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 20:09:57,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:57,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 20:09:57,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:09:58,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:09:58,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:09:58,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840224602] [2021-10-15 20:09:58,067 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:09:58,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898259263] [2021-10-15 20:09:58,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898259263] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:09:58,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:09:58,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 20:09:58,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036854979] [2021-10-15 20:09:58,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:09:58,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:09:58,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:09:58,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:09:58,073 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 20 [2021-10-15 20:09:58,074 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 13 places, 13 transitions, 26 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:09:58,074 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:09:58,074 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 20 [2021-10-15 20:09:58,074 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:09:58,157 INFO L129 PetriNetUnfolder]: 4/25 cut-off events. [2021-10-15 20:09:58,157 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:09:58,157 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 25 events. 4/25 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 26 event pairs, 0 based on Foata normal form. 1/25 useless extension candidates. Maximal degree in co-relation 39. Up to 9 conditions per place. [2021-10-15 20:09:58,158 INFO L132 encePairwiseOnDemand]: 14/20 looper letters, 7 selfloop transitions, 5 changer transitions 2/20 dead transitions. [2021-10-15 20:09:58,158 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 20 transitions, 68 flow [2021-10-15 20:09:58,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:09:58,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 20:09:58,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 61 transitions. [2021-10-15 20:09:58,162 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.61 [2021-10-15 20:09:58,163 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 61 transitions. [2021-10-15 20:09:58,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 61 transitions. [2021-10-15 20:09:58,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:09:58,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 61 transitions. [2021-10-15 20:09:58,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:09:58,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 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 20:09:58,166 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 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 20:09:58,167 INFO L186 Difference]: Start difference. First operand has 13 places, 13 transitions, 26 flow. Second operand 5 states and 61 transitions. [2021-10-15 20:09:58,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 20 transitions, 68 flow [2021-10-15 20:09:58,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 20 transitions, 68 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:09:58,172 INFO L242 Difference]: Finished difference. Result has 20 places, 17 transitions, 63 flow [2021-10-15 20:09:58,172 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=13, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=63, PETRI_PLACES=20, PETRI_TRANSITIONS=17} [2021-10-15 20:09:58,173 INFO L334 CegarLoopForPetriNet]: 12 programPoint places, 8 predicate places. [2021-10-15 20:09:58,173 INFO L470 AbstractCegarLoop]: Abstraction has has 20 places, 17 transitions, 63 flow [2021-10-15 20:09:58,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:09:58,175 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:09:58,175 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-10-15 20:09:58,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98b0d1-0b05-4442-bd17-228e95787c1d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 20:09:58,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98b0d1-0b05-4442-bd17-228e95787c1d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-10-15 20:09:58,402 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:09:58,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:09:58,402 INFO L82 PathProgramCache]: Analyzing trace with hash 855725686, now seen corresponding path program 1 times [2021-10-15 20:09:58,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:09:58,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750676930] [2021-10-15 20:09:58,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:09:58,403 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:09:58,421 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:09:58,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1478674470] [2021-10-15 20:09:58,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:09:58,427 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:09:58,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98b0d1-0b05-4442-bd17-228e95787c1d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:09:58,436 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98b0d1-0b05-4442-bd17-228e95787c1d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:09:58,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98b0d1-0b05-4442-bd17-228e95787c1d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 20:09:58,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:58,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-15 20:09:58,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:09:58,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:09:58,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:09:58,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750676930] [2021-10-15 20:09:58,629 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:09:58,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478674470] [2021-10-15 20:09:58,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478674470] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:09:58,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:09:58,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-15 20:09:58,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649252770] [2021-10-15 20:09:58,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:09:58,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:09:58,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:09:58,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:09:58,634 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 20 [2021-10-15 20:09:58,634 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 17 transitions, 63 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:09:58,635 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:09:58,635 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 20 [2021-10-15 20:09:58,635 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:09:58,704 INFO L129 PetriNetUnfolder]: 4/32 cut-off events. [2021-10-15 20:09:58,705 INFO L130 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2021-10-15 20:09:58,705 INFO L84 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 32 events. 4/32 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 33 event pairs, 0 based on Foata normal form. 2/34 useless extension candidates. Maximal degree in co-relation 73. Up to 9 conditions per place. [2021-10-15 20:09:58,706 INFO L132 encePairwiseOnDemand]: 14/20 looper letters, 9 selfloop transitions, 6 changer transitions 3/24 dead transitions. [2021-10-15 20:09:58,706 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 24 transitions, 129 flow [2021-10-15 20:09:58,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 20:09:58,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 20:09:58,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 73 transitions. [2021-10-15 20:09:58,708 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2021-10-15 20:09:58,709 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 73 transitions. [2021-10-15 20:09:58,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 73 transitions. [2021-10-15 20:09:58,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:09:58,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 73 transitions. [2021-10-15 20:09:58,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:09:58,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:09:58,712 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:09:58,713 INFO L186 Difference]: Start difference. First operand has 20 places, 17 transitions, 63 flow. Second operand 6 states and 73 transitions. [2021-10-15 20:09:58,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 24 transitions, 129 flow [2021-10-15 20:09:58,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 24 transitions, 129 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:09:58,717 INFO L242 Difference]: Finished difference. Result has 27 places, 19 transitions, 99 flow [2021-10-15 20:09:58,717 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=99, PETRI_PLACES=27, PETRI_TRANSITIONS=19} [2021-10-15 20:09:58,718 INFO L334 CegarLoopForPetriNet]: 12 programPoint places, 15 predicate places. [2021-10-15 20:09:58,718 INFO L470 AbstractCegarLoop]: Abstraction has has 27 places, 19 transitions, 99 flow [2021-10-15 20:09:58,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:09:58,718 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:09:58,719 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2021-10-15 20:09:58,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98b0d1-0b05-4442-bd17-228e95787c1d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 20:09:58,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98b0d1-0b05-4442-bd17-228e95787c1d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:09:58,945 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:09:58,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:09:58,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1778536670, now seen corresponding path program 2 times [2021-10-15 20:09:58,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:09:58,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983047839] [2021-10-15 20:09:58,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:09:58,947 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:09:58,962 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:09:58,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1661943848] [2021-10-15 20:09:58,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 20:09:58,962 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:09:58,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98b0d1-0b05-4442-bd17-228e95787c1d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:09:58,963 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98b0d1-0b05-4442-bd17-228e95787c1d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:09:58,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98b0d1-0b05-4442-bd17-228e95787c1d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 20:09:59,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 20:09:59,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:09:59,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-15 20:09:59,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:09:59,729 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:09:59,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:09:59,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983047839] [2021-10-15 20:09:59,730 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:09:59,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661943848] [2021-10-15 20:09:59,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661943848] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:09:59,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:09:59,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-15 20:09:59,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928320283] [2021-10-15 20:09:59,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 20:09:59,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:09:59,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 20:09:59,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-15 20:09:59,734 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 20 [2021-10-15 20:09:59,734 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 19 transitions, 99 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:09:59,734 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:09:59,735 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 20 [2021-10-15 20:09:59,735 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:10:02,012 INFO L129 PetriNetUnfolder]: 4/39 cut-off events. [2021-10-15 20:10:02,013 INFO L130 PetriNetUnfolder]: For 73/73 co-relation queries the response was YES. [2021-10-15 20:10:02,013 INFO L84 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 39 events. 4/39 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 39 event pairs, 0 based on Foata normal form. 2/41 useless extension candidates. Maximal degree in co-relation 108. Up to 10 conditions per place. [2021-10-15 20:10:02,014 INFO L132 encePairwiseOnDemand]: 13/20 looper letters, 10 selfloop transitions, 8 changer transitions 4/28 dead transitions. [2021-10-15 20:10:02,014 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 28 transitions, 193 flow [2021-10-15 20:10:02,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 20:10:02,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-15 20:10:02,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 95 transitions. [2021-10-15 20:10:02,017 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.59375 [2021-10-15 20:10:02,017 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 95 transitions. [2021-10-15 20:10:02,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 95 transitions. [2021-10-15 20:10:02,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:10:02,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 95 transitions. [2021-10-15 20:10:02,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:10:02,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 20.0) internal successors, (180), 9 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:10:02,020 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 20.0) internal successors, (180), 9 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:10:02,021 INFO L186 Difference]: Start difference. First operand has 27 places, 19 transitions, 99 flow. Second operand 8 states and 95 transitions. [2021-10-15 20:10:02,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 28 transitions, 193 flow [2021-10-15 20:10:02,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 28 transitions, 178 flow, removed 4 selfloop flow, removed 3 redundant places. [2021-10-15 20:10:02,025 INFO L242 Difference]: Finished difference. Result has 34 places, 22 transitions, 137 flow [2021-10-15 20:10:02,026 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=137, PETRI_PLACES=34, PETRI_TRANSITIONS=22} [2021-10-15 20:10:02,026 INFO L334 CegarLoopForPetriNet]: 12 programPoint places, 22 predicate places. [2021-10-15 20:10:02,026 INFO L470 AbstractCegarLoop]: Abstraction has has 34 places, 22 transitions, 137 flow [2021-10-15 20:10:02,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:10:02,027 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:10:02,027 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2021-10-15 20:10:02,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98b0d1-0b05-4442-bd17-228e95787c1d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 20:10:02,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98b0d1-0b05-4442-bd17-228e95787c1d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:10:02,241 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:10:02,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:10:02,242 INFO L82 PathProgramCache]: Analyzing trace with hash -58338866, now seen corresponding path program 3 times [2021-10-15 20:10:02,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:10:02,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432773682] [2021-10-15 20:10:02,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:10:02,243 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:10:02,256 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:10:02,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [312587531] [2021-10-15 20:10:02,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 20:10:02,257 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:10:02,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98b0d1-0b05-4442-bd17-228e95787c1d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:10:02,258 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98b0d1-0b05-4442-bd17-228e95787c1d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:10:02,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98b0d1-0b05-4442-bd17-228e95787c1d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 20:10:02,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-15 20:10:02,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:10:02,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-15 20:10:02,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:10:03,177 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-15 20:10:03,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:10:03,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432773682] [2021-10-15 20:10:03,178 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:10:03,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312587531] [2021-10-15 20:10:03,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312587531] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:10:03,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:10:03,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-15 20:10:03,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266139382] [2021-10-15 20:10:03,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 20:10:03,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:10:03,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 20:10:03,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:10:03,181 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 20 [2021-10-15 20:10:03,182 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 22 transitions, 137 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:10:03,182 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:10:03,182 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 20 [2021-10-15 20:10:03,182 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:10:15,097 WARN L207 SmtUtils]: Spent 11.84 s on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2021-10-15 20:10:15,143 INFO L129 PetriNetUnfolder]: 3/34 cut-off events. [2021-10-15 20:10:15,143 INFO L130 PetriNetUnfolder]: For 102/102 co-relation queries the response was YES. [2021-10-15 20:10:15,144 INFO L84 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 34 events. 3/34 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 26 event pairs, 0 based on Foata normal form. 2/36 useless extension candidates. Maximal degree in co-relation 108. Up to 15 conditions per place. [2021-10-15 20:10:15,144 INFO L132 encePairwiseOnDemand]: 15/20 looper letters, 0 selfloop transitions, 0 changer transitions 20/20 dead transitions. [2021-10-15 20:10:15,144 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 20 transitions, 163 flow [2021-10-15 20:10:15,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:10:15,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 20:10:15,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 56 transitions. [2021-10-15 20:10:15,146 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.56 [2021-10-15 20:10:15,146 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 56 transitions. [2021-10-15 20:10:15,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 56 transitions. [2021-10-15 20:10:15,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:10:15,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 56 transitions. [2021-10-15 20:10:15,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:10:15,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 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 20:10:15,149 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 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 20:10:15,149 INFO L186 Difference]: Start difference. First operand has 34 places, 22 transitions, 137 flow. Second operand 5 states and 56 transitions. [2021-10-15 20:10:15,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 20 transitions, 163 flow [2021-10-15 20:10:15,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 20 transitions, 140 flow, removed 7 selfloop flow, removed 4 redundant places. [2021-10-15 20:10:15,153 INFO L242 Difference]: Finished difference. Result has 30 places, 0 transitions, 0 flow [2021-10-15 20:10:15,154 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=30, PETRI_TRANSITIONS=0} [2021-10-15 20:10:15,154 INFO L334 CegarLoopForPetriNet]: 12 programPoint places, 18 predicate places. [2021-10-15 20:10:15,154 INFO L470 AbstractCegarLoop]: Abstraction has has 30 places, 0 transitions, 0 flow [2021-10-15 20:10:15,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:10:15,157 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:10:15,158 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:10:15,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98b0d1-0b05-4442-bd17-228e95787c1d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 20:10:15,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98b0d1-0b05-4442-bd17-228e95787c1d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:10:15,389 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 20:10:15,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:10:15 BoogieIcfgContainer [2021-10-15 20:10:15,392 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 20:10:15,393 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 20:10:15,393 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 20:10:15,393 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 20:10:15,394 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:09:57" (3/4) ... [2021-10-15 20:10:15,397 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 20:10:15,407 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-10-15 20:10:15,408 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 20:10:15,408 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:10:15,408 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:10:15,444 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98b0d1-0b05-4442-bd17-228e95787c1d/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 20:10:15,444 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 20:10:15,446 INFO L168 Benchmark]: Toolchain (without parser) took 18688.51 ms. Allocated memory was 94.4 MB in the beginning and 123.7 MB in the end (delta: 29.4 MB). Free memory was 59.8 MB in the beginning and 86.9 MB in the end (delta: -27.0 MB). Peak memory consumption was 961.5 kB. Max. memory is 16.1 GB. [2021-10-15 20:10:15,446 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 94.4 MB. Free memory was 65.8 MB in the beginning and 65.8 MB in the end (delta: 27.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:10:15,447 INFO L168 Benchmark]: CACSL2BoogieTranslator took 250.77 ms. Allocated memory is still 94.4 MB. Free memory was 59.7 MB in the beginning and 70.7 MB in the end (delta: -11.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 20:10:15,448 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.42 ms. Allocated memory is still 94.4 MB. Free memory was 70.7 MB in the beginning and 69.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:10:15,448 INFO L168 Benchmark]: Boogie Preprocessor took 22.13 ms. Allocated memory is still 94.4 MB. Free memory was 69.0 MB in the beginning and 68.2 MB in the end (delta: 754.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:10:15,449 INFO L168 Benchmark]: RCFGBuilder took 313.81 ms. Allocated memory is still 94.4 MB. Free memory was 68.2 MB in the beginning and 58.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 20:10:15,449 INFO L168 Benchmark]: TraceAbstraction took 18009.51 ms. Allocated memory was 94.4 MB in the beginning and 123.7 MB in the end (delta: 29.4 MB). Free memory was 58.5 MB in the beginning and 89.0 MB in the end (delta: -30.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:10:15,450 INFO L168 Benchmark]: Witness Printer took 51.89 ms. Allocated memory is still 123.7 MB. Free memory was 89.0 MB in the beginning and 86.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:10:15,453 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 94.4 MB. Free memory was 65.8 MB in the beginning and 65.8 MB in the end (delta: 27.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 250.77 ms. Allocated memory is still 94.4 MB. Free memory was 59.7 MB in the beginning and 70.7 MB in the end (delta: -11.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.42 ms. Allocated memory is still 94.4 MB. Free memory was 70.7 MB in the beginning and 69.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.13 ms. Allocated memory is still 94.4 MB. Free memory was 69.0 MB in the beginning and 68.2 MB in the end (delta: 754.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 313.81 ms. Allocated memory is still 94.4 MB. Free memory was 68.2 MB in the beginning and 58.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 18009.51 ms. Allocated memory was 94.4 MB in the beginning and 123.7 MB in the end (delta: 29.4 MB). Free memory was 58.5 MB in the beginning and 89.0 MB in the end (delta: -30.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 51.89 ms. Allocated memory is still 123.7 MB. Free memory was 89.0 MB in the beginning and 86.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: 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, 16 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 3.0ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 17916.5ms, OverallIterations: 5, TraceHistogramMax: 4, EmptinessCheckTime: 0.0ms, AutomataDifference: 14505.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 39.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 12 SDtfs, 15 SDslu, 21 SDs, 0 SdLazy, 109 SolverSat, 32 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2312.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 12252.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=137occurred in iteration=4, InterpolantAutomatonStates: 26, 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: 35.2ms SsaConstructionTime, 126.4ms SatisfiabilityAnalysisTime, 1871.4ms InterpolantComputationTime, 54 NumberOfCodeBlocks, 46 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 49 ConstructedInterpolants, 0 QuantifiedInterpolants, 389 SizeOfPredicates, 22 NumberOfNonLiveVariables, 304 ConjunctsInSsa, 54 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 20/34 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 20:10:15,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98b0d1-0b05-4442-bd17-228e95787c1d/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...