./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id2_i5_o5-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee5024f-22cf-4222-8495-ced05306c9b4/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee5024f-22cf-4222-8495-ced05306c9b4/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee5024f-22cf-4222-8495-ced05306c9b4/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee5024f-22cf-4222-8495-ced05306c9b4/bin/uautomizer-GMMbpWq8iD/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id2_i5_o5-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee5024f-22cf-4222-8495-ced05306c9b4/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee5024f-22cf-4222-8495-ced05306c9b4/bin/uautomizer-GMMbpWq8iD --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 9c0fb6a0d32b99c9a776859d2bc15d9177dc584955a2c1baa8ac133e976f40f7 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 23:08:54,814 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 23:08:54,818 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 23:08:54,892 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 23:08:54,893 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 23:08:54,901 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 23:08:54,904 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 23:08:54,909 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 23:08:54,913 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 23:08:54,924 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 23:08:54,925 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 23:08:54,928 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 23:08:54,929 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 23:08:54,933 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 23:08:54,935 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 23:08:54,944 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 23:08:54,946 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 23:08:54,948 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 23:08:54,951 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 23:08:54,964 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 23:08:54,967 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 23:08:54,969 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 23:08:54,977 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 23:08:54,979 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 23:08:54,984 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 23:08:54,985 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 23:08:54,985 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 23:08:54,991 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 23:08:54,992 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 23:08:54,994 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 23:08:54,994 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 23:08:54,996 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 23:08:54,998 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 23:08:55,000 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 23:08:55,003 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 23:08:55,003 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 23:08:55,004 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 23:08:55,005 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 23:08:55,005 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 23:08:55,007 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 23:08:55,008 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 23:08:55,009 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee5024f-22cf-4222-8495-ced05306c9b4/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 23:08:55,065 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 23:08:55,065 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 23:08:55,066 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 23:08:55,067 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 23:08:55,068 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 23:08:55,069 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 23:08:55,069 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 23:08:55,070 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 23:08:55,070 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 23:08:55,070 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 23:08:55,072 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 23:08:55,072 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 23:08:55,072 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 23:08:55,073 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 23:08:55,073 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 23:08:55,073 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 23:08:55,074 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 23:08:55,074 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 23:08:55,074 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 23:08:55,074 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 23:08:55,075 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 23:08:55,075 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 23:08:55,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:08:55,076 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 23:08:55,076 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 23:08:55,076 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 23:08:55,077 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 23:08:55,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 23:08:55,077 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 23:08:55,079 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 23:08:55,080 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 23:08:55,080 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 23:08:55,081 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_8ee5024f-22cf-4222-8495-ced05306c9b4/bin/uautomizer-GMMbpWq8iD/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee5024f-22cf-4222-8495-ced05306c9b4/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9c0fb6a0d32b99c9a776859d2bc15d9177dc584955a2c1baa8ac133e976f40f7 [2021-10-28 23:08:55,482 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 23:08:55,509 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 23:08:55,513 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 23:08:55,514 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 23:08:55,515 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 23:08:55,516 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee5024f-22cf-4222-8495-ced05306c9b4/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/recursive-simple/id2_i5_o5-2.c [2021-10-28 23:08:55,592 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee5024f-22cf-4222-8495-ced05306c9b4/bin/uautomizer-GMMbpWq8iD/data/9668a09e5/dfa760f9ce7c4cb6b343e0ac4295d9be/FLAG2552220bf [2021-10-28 23:08:56,174 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 23:08:56,176 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee5024f-22cf-4222-8495-ced05306c9b4/sv-benchmarks/c/recursive-simple/id2_i5_o5-2.c [2021-10-28 23:08:56,191 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee5024f-22cf-4222-8495-ced05306c9b4/bin/uautomizer-GMMbpWq8iD/data/9668a09e5/dfa760f9ce7c4cb6b343e0ac4295d9be/FLAG2552220bf [2021-10-28 23:08:56,516 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee5024f-22cf-4222-8495-ced05306c9b4/bin/uautomizer-GMMbpWq8iD/data/9668a09e5/dfa760f9ce7c4cb6b343e0ac4295d9be [2021-10-28 23:08:56,520 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 23:08:56,522 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 23:08:56,525 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 23:08:56,526 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 23:08:56,531 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 23:08:56,532 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:08:56" (1/1) ... [2021-10-28 23:08:56,533 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10e8d965 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:08:56, skipping insertion in model container [2021-10-28 23:08:56,533 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:08:56" (1/1) ... [2021-10-28 23:08:56,543 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 23:08:56,562 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 23:08:56,821 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_8ee5024f-22cf-4222-8495-ced05306c9b4/sv-benchmarks/c/recursive-simple/id2_i5_o5-2.c[548,561] [2021-10-28 23:08:56,825 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:08:56,849 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 23:08:56,870 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_8ee5024f-22cf-4222-8495-ced05306c9b4/sv-benchmarks/c/recursive-simple/id2_i5_o5-2.c[548,561] [2021-10-28 23:08:56,871 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:08:56,889 INFO L208 MainTranslator]: Completed translation [2021-10-28 23:08:56,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:08:56 WrapperNode [2021-10-28 23:08:56,890 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 23:08:56,892 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 23:08:56,892 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 23:08:56,892 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 23:08:56,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:08:56" (1/1) ... [2021-10-28 23:08:56,911 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:08:56" (1/1) ... [2021-10-28 23:08:56,932 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 23:08:56,933 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 23:08:56,933 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 23:08:56,934 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 23:08:56,944 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:08:56" (1/1) ... [2021-10-28 23:08:56,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:08:56" (1/1) ... [2021-10-28 23:08:56,946 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:08:56" (1/1) ... [2021-10-28 23:08:56,946 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:08:56" (1/1) ... [2021-10-28 23:08:56,951 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:08:56" (1/1) ... [2021-10-28 23:08:56,953 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:08:56" (1/1) ... [2021-10-28 23:08:56,954 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:08:56" (1/1) ... [2021-10-28 23:08:56,956 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 23:08:56,957 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 23:08:56,973 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 23:08:56,974 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 23:08:56,975 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:08:56" (1/1) ... [2021-10-28 23:08:56,989 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:08:57,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee5024f-22cf-4222-8495-ced05306c9b4/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:08:57,017 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee5024f-22cf-4222-8495-ced05306c9b4/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 23:08:57,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee5024f-22cf-4222-8495-ced05306c9b4/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 23:08:57,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 23:08:57,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 23:08:57,084 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2021-10-28 23:08:57,084 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2021-10-28 23:08:57,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 23:08:57,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 23:08:57,085 INFO L130 BoogieDeclarations]: Found specification of procedure id [2021-10-28 23:08:57,085 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2021-10-28 23:08:57,375 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 23:08:57,376 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-28 23:08:57,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:08:57 BoogieIcfgContainer [2021-10-28 23:08:57,378 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 23:08:57,381 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 23:08:57,381 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 23:08:57,391 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 23:08:57,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 11:08:56" (1/3) ... [2021-10-28 23:08:57,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cd25ec5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:08:57, skipping insertion in model container [2021-10-28 23:08:57,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:08:56" (2/3) ... [2021-10-28 23:08:57,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cd25ec5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:08:57, skipping insertion in model container [2021-10-28 23:08:57,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:08:57" (3/3) ... [2021-10-28 23:08:57,395 INFO L111 eAbstractionObserver]: Analyzing ICFG id2_i5_o5-2.c [2021-10-28 23:08:57,408 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 23:08:57,408 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-28 23:08:57,467 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 23:08:57,476 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, mAutomataTypeConcurrency=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 [2021-10-28 23:08:57,477 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-28 23:08:57,498 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 23:08:57,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 23:08:57,505 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:08:57,506 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:08:57,507 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:08:57,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:08:57,514 INFO L85 PathProgramCache]: Analyzing trace with hash -214835512, now seen corresponding path program 1 times [2021-10-28 23:08:57,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:08:57,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713108351] [2021-10-28 23:08:57,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:08:57,529 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:08:57,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:08:57,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:08:57,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:08:57,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:08:57,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:08:57,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713108351] [2021-10-28 23:08:57,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713108351] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:08:57,825 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:08:57,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 23:08:57,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204430601] [2021-10-28 23:08:57,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:08:57,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:08:57,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:08:57,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:08:57,884 INFO L87 Difference]: Start difference. First operand has 22 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:08:58,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:08:58,016 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2021-10-28 23:08:58,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:08:58,022 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-28 23:08:58,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:08:58,033 INFO L225 Difference]: With dead ends: 31 [2021-10-28 23:08:58,034 INFO L226 Difference]: Without dead ends: 21 [2021-10-28 23:08:58,038 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:08:58,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-10-28 23:08:58,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-10-28 23:08:58,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-28 23:08:58,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-10-28 23:08:58,094 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 10 [2021-10-28 23:08:58,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:08:58,095 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-10-28 23:08:58,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:08:58,097 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-10-28 23:08:58,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-28 23:08:58,101 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:08:58,101 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:08:58,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 23:08:58,102 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:08:58,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:08:58,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1901198062, now seen corresponding path program 1 times [2021-10-28 23:08:58,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:08:58,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086394429] [2021-10-28 23:08:58,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:08:58,108 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:08:58,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:08:58,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:08:58,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:08:58,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:08:58,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:08:58,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:08:58,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:08:58,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086394429] [2021-10-28 23:08:58,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086394429] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:08:58,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:08:58,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 23:08:58,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782565872] [2021-10-28 23:08:58,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:08:58,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:08:58,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:08:58,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:08:58,367 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 23:08:58,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:08:58,494 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-10-28 23:08:58,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:08:58,495 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2021-10-28 23:08:58,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:08:58,496 INFO L225 Difference]: With dead ends: 30 [2021-10-28 23:08:58,496 INFO L226 Difference]: Without dead ends: 26 [2021-10-28 23:08:58,497 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:08:58,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-28 23:08:58,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2021-10-28 23:08:58,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-28 23:08:58,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-10-28 23:08:58,505 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 16 [2021-10-28 23:08:58,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:08:58,506 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-10-28 23:08:58,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 23:08:58,507 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-10-28 23:08:58,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-28 23:08:58,508 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:08:58,508 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:08:58,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 23:08:58,509 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:08:58,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:08:58,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1593669520, now seen corresponding path program 1 times [2021-10-28 23:08:58,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:08:58,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626049506] [2021-10-28 23:08:58,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:08:58,521 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:08:58,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:08:58,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:08:58,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:08:58,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:08:58,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:08:58,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:08:58,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:08:58,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 23:08:58,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:08:58,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626049506] [2021-10-28 23:08:58,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626049506] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:08:58,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007740114] [2021-10-28 23:08:58,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:08:58,874 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:08:58,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee5024f-22cf-4222-8495-ced05306c9b4/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:08:58,879 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee5024f-22cf-4222-8495-ced05306c9b4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:08:58,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee5024f-22cf-4222-8495-ced05306c9b4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 23:08:58,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:08:58,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 23:08:58,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:08:59,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 23:08:59,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007740114] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:08:59,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:08:59,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-10-28 23:08:59,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867817866] [2021-10-28 23:08:59,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 23:08:59,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:08:59,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 23:08:59,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:08:59,270 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 11 states have internal predecessors, (21), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-28 23:08:59,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:08:59,378 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2021-10-28 23:08:59,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 23:08:59,379 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 11 states have internal predecessors, (21), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 22 [2021-10-28 23:08:59,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:08:59,381 INFO L225 Difference]: With dead ends: 36 [2021-10-28 23:08:59,381 INFO L226 Difference]: Without dead ends: 32 [2021-10-28 23:08:59,382 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-10-28 23:08:59,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-28 23:08:59,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2021-10-28 23:08:59,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-28 23:08:59,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-10-28 23:08:59,390 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 22 [2021-10-28 23:08:59,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:08:59,391 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-10-28 23:08:59,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 11 states have internal predecessors, (21), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-28 23:08:59,391 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-10-28 23:08:59,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-28 23:08:59,393 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:08:59,393 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:08:59,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee5024f-22cf-4222-8495-ced05306c9b4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 23:08:59,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee5024f-22cf-4222-8495-ced05306c9b4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:08:59,613 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:08:59,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:08:59,613 INFO L85 PathProgramCache]: Analyzing trace with hash 545848374, now seen corresponding path program 1 times [2021-10-28 23:08:59,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:08:59,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289429722] [2021-10-28 23:08:59,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:08:59,615 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:08:59,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:08:59,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:08:59,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:08:59,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:08:59,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:08:59,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:08:59,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:08:59,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:08:59,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:08:59,869 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-28 23:08:59,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:08:59,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289429722] [2021-10-28 23:08:59,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289429722] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:08:59,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235345647] [2021-10-28 23:08:59,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:08:59,871 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:08:59,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee5024f-22cf-4222-8495-ced05306c9b4/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:08:59,872 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee5024f-22cf-4222-8495-ced05306c9b4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:08:59,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee5024f-22cf-4222-8495-ced05306c9b4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 23:08:59,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:08:59,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 23:08:59,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:09:00,152 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-28 23:09:00,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235345647] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:09:00,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:09:00,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-10-28 23:09:00,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843637778] [2021-10-28 23:09:00,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 23:09:00,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:09:00,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 23:09:00,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:09:00,155 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 states have internal predecessors, (23), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2021-10-28 23:09:00,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:09:00,259 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2021-10-28 23:09:00,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 23:09:00,260 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 states have internal predecessors, (23), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) Word has length 28 [2021-10-28 23:09:00,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:09:00,262 INFO L225 Difference]: With dead ends: 42 [2021-10-28 23:09:00,262 INFO L226 Difference]: Without dead ends: 38 [2021-10-28 23:09:00,263 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-10-28 23:09:00,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-28 23:09:00,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2021-10-28 23:09:00,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.1) internal successors, (22), 21 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 6 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-28 23:09:00,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-10-28 23:09:00,271 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 28 [2021-10-28 23:09:00,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:09:00,271 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-10-28 23:09:00,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 states have internal predecessors, (23), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2021-10-28 23:09:00,272 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-10-28 23:09:00,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-28 23:09:00,273 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:09:00,273 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:09:00,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee5024f-22cf-4222-8495-ced05306c9b4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 23:09:00,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee5024f-22cf-4222-8495-ced05306c9b4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:09:00,489 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:09:00,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:09:00,490 INFO L85 PathProgramCache]: Analyzing trace with hash 120771672, now seen corresponding path program 2 times [2021-10-28 23:09:00,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:09:00,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158705864] [2021-10-28 23:09:00,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:09:00,491 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:09:00,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:00,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:09:00,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:00,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:09:00,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:00,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:09:00,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:00,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:09:00,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:00,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:09:00,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:00,754 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-28 23:09:00,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:09:00,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158705864] [2021-10-28 23:09:00,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158705864] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:09:00,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029938155] [2021-10-28 23:09:00,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:09:00,756 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:09:00,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee5024f-22cf-4222-8495-ced05306c9b4/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:09:00,757 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee5024f-22cf-4222-8495-ced05306c9b4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:09:00,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee5024f-22cf-4222-8495-ced05306c9b4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 23:09:00,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:09:00,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:09:00,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 23:09:00,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:09:01,107 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-28 23:09:01,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029938155] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:09:01,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:09:01,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-10-28 23:09:01,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224267341] [2021-10-28 23:09:01,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 23:09:01,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:09:01,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 23:09:01,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-10-28 23:09:01,111 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 6 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-10-28 23:09:01,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:09:01,247 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2021-10-28 23:09:01,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:09:01,248 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 6 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 34 [2021-10-28 23:09:01,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:09:01,250 INFO L225 Difference]: With dead ends: 48 [2021-10-28 23:09:01,250 INFO L226 Difference]: Without dead ends: 44 [2021-10-28 23:09:01,251 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-10-28 23:09:01,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-28 23:09:01,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 33. [2021-10-28 23:09:01,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 23 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 7 states have return successors, (8), 7 states have call predecessors, (8), 3 states have call successors, (8) [2021-10-28 23:09:01,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-10-28 23:09:01,259 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 34 [2021-10-28 23:09:01,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:09:01,260 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-10-28 23:09:01,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 6 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-10-28 23:09:01,261 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-10-28 23:09:01,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 23:09:01,268 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:09:01,268 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:09:01,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee5024f-22cf-4222-8495-ced05306c9b4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 23:09:01,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee5024f-22cf-4222-8495-ced05306c9b4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:09:01,469 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:09:01,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:09:01,470 INFO L85 PathProgramCache]: Analyzing trace with hash -644488834, now seen corresponding path program 2 times [2021-10-28 23:09:01,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:09:01,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191931678] [2021-10-28 23:09:01,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:09:01,471 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:09:01,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:01,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:09:01,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:01,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:09:01,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:01,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:09:01,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:01,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:09:01,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:01,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:09:01,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:01,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:09:01,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:01,868 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-28 23:09:01,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:09:01,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191931678] [2021-10-28 23:09:01,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191931678] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:09:01,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234286676] [2021-10-28 23:09:01,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:09:01,871 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:09:01,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee5024f-22cf-4222-8495-ced05306c9b4/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:09:01,874 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee5024f-22cf-4222-8495-ced05306c9b4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:09:01,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee5024f-22cf-4222-8495-ced05306c9b4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 23:09:01,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:09:01,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:09:01,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-28 23:09:01,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:09:02,381 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-28 23:09:02,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234286676] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:09:02,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:09:02,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-10-28 23:09:02,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534983493] [2021-10-28 23:09:02,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 23:09:02,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:09:02,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 23:09:02,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-10-28 23:09:02,384 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (6), 6 states have call predecessors, (6), 1 states have call successors, (6) [2021-10-28 23:09:02,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:09:02,494 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2021-10-28 23:09:02,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 23:09:02,495 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (6), 6 states have call predecessors, (6), 1 states have call successors, (6) Word has length 40 [2021-10-28 23:09:02,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:09:02,497 INFO L225 Difference]: With dead ends: 54 [2021-10-28 23:09:02,497 INFO L226 Difference]: Without dead ends: 50 [2021-10-28 23:09:02,498 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-10-28 23:09:02,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-28 23:09:02,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2021-10-28 23:09:02,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 3 states have call successors, (3), 2 states have call predecessors, (3), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2021-10-28 23:09:02,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-10-28 23:09:02,507 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 40 [2021-10-28 23:09:02,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:09:02,508 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-10-28 23:09:02,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (6), 6 states have call predecessors, (6), 1 states have call successors, (6) [2021-10-28 23:09:02,508 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-10-28 23:09:02,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-28 23:09:02,510 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:09:02,510 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:09:02,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee5024f-22cf-4222-8495-ced05306c9b4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 23:09:02,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee5024f-22cf-4222-8495-ced05306c9b4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:09:02,718 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:09:02,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:09:02,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1812460832, now seen corresponding path program 3 times [2021-10-28 23:09:02,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:09:02,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986445265] [2021-10-28 23:09:02,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:09:02,719 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:09:02,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:02,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:09:02,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:02,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:09:02,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:02,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:09:02,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:02,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:09:02,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:02,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:09:02,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:02,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:09:02,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:03,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:09:03,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:03,020 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-10-28 23:09:03,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:09:03,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986445265] [2021-10-28 23:09:03,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986445265] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:09:03,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760967471] [2021-10-28 23:09:03,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:09:03,022 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:09:03,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee5024f-22cf-4222-8495-ced05306c9b4/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:09:03,026 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee5024f-22cf-4222-8495-ced05306c9b4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:09:03,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee5024f-22cf-4222-8495-ced05306c9b4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 23:09:03,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-28 23:09:03,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:09:03,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-28 23:09:03,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:09:03,445 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-10-28 23:09:03,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760967471] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:09:03,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:09:03,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 15 [2021-10-28 23:09:03,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834115380] [2021-10-28 23:09:03,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 23:09:03,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:09:03,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 23:09:03,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-10-28 23:09:03,455 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 7 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-28 23:09:03,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:09:03,653 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2021-10-28 23:09:03,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 23:09:03,654 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 7 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2021-10-28 23:09:03,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:09:03,657 INFO L225 Difference]: With dead ends: 60 [2021-10-28 23:09:03,657 INFO L226 Difference]: Without dead ends: 36 [2021-10-28 23:09:03,659 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-10-28 23:09:03,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-28 23:09:03,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-10-28 23:09:03,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2021-10-28 23:09:03,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-10-28 23:09:03,684 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 46 [2021-10-28 23:09:03,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:09:03,685 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-10-28 23:09:03,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 7 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-28 23:09:03,686 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-10-28 23:09:03,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-28 23:09:03,691 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:09:03,691 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:09:03,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee5024f-22cf-4222-8495-ced05306c9b4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 23:09:03,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee5024f-22cf-4222-8495-ced05306c9b4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-28 23:09:03,918 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:09:03,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:09:03,918 INFO L85 PathProgramCache]: Analyzing trace with hash -866735418, now seen corresponding path program 3 times [2021-10-28 23:09:03,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:09:03,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497616185] [2021-10-28 23:09:03,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:09:03,919 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:09:03,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:03,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:09:03,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:04,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:09:04,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:04,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:09:04,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:04,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:09:04,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:04,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:09:04,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:04,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:09:04,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:04,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:09:04,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:04,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:09:04,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:04,240 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-10-28 23:09:04,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:09:04,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497616185] [2021-10-28 23:09:04,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497616185] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:09:04,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664525433] [2021-10-28 23:09:04,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:09:04,242 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:09:04,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee5024f-22cf-4222-8495-ced05306c9b4/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:09:04,246 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee5024f-22cf-4222-8495-ced05306c9b4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:09:04,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee5024f-22cf-4222-8495-ced05306c9b4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 23:09:04,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-28 23:09:04,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:09:04,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-28 23:09:04,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:09:04,744 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-10-28 23:09:04,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664525433] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:09:04,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:09:04,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 16 [2021-10-28 23:09:04,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656482031] [2021-10-28 23:09:04,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 23:09:04,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:09:04,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 23:09:04,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-10-28 23:09:04,747 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 8 states have return successors, (8), 8 states have call predecessors, (8), 3 states have call successors, (8) [2021-10-28 23:09:04,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:09:04,936 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2021-10-28 23:09:04,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 23:09:04,937 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 8 states have return successors, (8), 8 states have call predecessors, (8), 3 states have call successors, (8) Word has length 52 [2021-10-28 23:09:04,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:09:04,939 INFO L225 Difference]: With dead ends: 36 [2021-10-28 23:09:04,939 INFO L226 Difference]: Without dead ends: 0 [2021-10-28 23:09:04,940 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-10-28 23:09:04,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-28 23:09:04,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-28 23:09:04,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2021-10-28 23:09:04,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 23:09:04,941 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 52 [2021-10-28 23:09:04,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:09:04,942 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 23:09:04,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 8 states have return successors, (8), 8 states have call predecessors, (8), 3 states have call successors, (8) [2021-10-28 23:09:04,943 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-28 23:09:04,943 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-28 23:09:04,946 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 23:09:04,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee5024f-22cf-4222-8495-ced05306c9b4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 23:09:05,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee5024f-22cf-4222-8495-ced05306c9b4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:09:05,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-28 23:09:05,168 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 23:09:05,170 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 23:09:05,172 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 23:09:05,173 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 23:09:05,174 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 23:09:05,175 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 23:09:05,176 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 23:09:05,192 INFO L853 garLoopResultBuilder]: At program point L16(line 16) the Hoare annotation is: (= id2_~x |id2_#in~x|) [2021-10-28 23:09:05,193 INFO L857 garLoopResultBuilder]: For program point L15(line 15) no Hoare annotation was computed. [2021-10-28 23:09:05,193 INFO L857 garLoopResultBuilder]: For program point L16-1(line 16) no Hoare annotation was computed. [2021-10-28 23:09:05,193 INFO L857 garLoopResultBuilder]: For program point id2EXIT(lines 14 17) no Hoare annotation was computed. [2021-10-28 23:09:05,193 INFO L860 garLoopResultBuilder]: At program point id2ENTRY(lines 14 17) the Hoare annotation is: true [2021-10-28 23:09:05,194 INFO L857 garLoopResultBuilder]: For program point id2FINAL(lines 14 17) no Hoare annotation was computed. [2021-10-28 23:09:05,194 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-28 23:09:05,194 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-28 23:09:05,194 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-28 23:09:05,194 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-28 23:09:05,195 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 23) no Hoare annotation was computed. [2021-10-28 23:09:05,195 INFO L857 garLoopResultBuilder]: For program point L23(line 23) no Hoare annotation was computed. [2021-10-28 23:09:05,195 INFO L857 garLoopResultBuilder]: For program point L22(lines 22 24) no Hoare annotation was computed. [2021-10-28 23:09:05,195 INFO L853 garLoopResultBuilder]: At program point L21(line 21) the Hoare annotation is: (and (<= ULTIMATE.start_main_~input~0 5) (<= 5 ULTIMATE.start_main_~input~0)) [2021-10-28 23:09:05,196 INFO L857 garLoopResultBuilder]: For program point L21-1(line 21) no Hoare annotation was computed. [2021-10-28 23:09:05,196 INFO L857 garLoopResultBuilder]: For program point L19(lines 19 25) no Hoare annotation was computed. [2021-10-28 23:09:05,196 INFO L857 garLoopResultBuilder]: For program point idFINAL(lines 9 12) no Hoare annotation was computed. [2021-10-28 23:09:05,196 INFO L853 garLoopResultBuilder]: At program point L11(line 11) the Hoare annotation is: (= |id_#in~x| id_~x) [2021-10-28 23:09:05,196 INFO L857 garLoopResultBuilder]: For program point idEXIT(lines 9 12) no Hoare annotation was computed. [2021-10-28 23:09:05,197 INFO L857 garLoopResultBuilder]: For program point L10(line 10) no Hoare annotation was computed. [2021-10-28 23:09:05,197 INFO L857 garLoopResultBuilder]: For program point L11-1(line 11) no Hoare annotation was computed. [2021-10-28 23:09:05,197 INFO L860 garLoopResultBuilder]: At program point idENTRY(lines 9 12) the Hoare annotation is: true [2021-10-28 23:09:05,201 INFO L731 BasicCegarLoop]: Path program histogram: [3, 3, 1, 1] [2021-10-28 23:09:05,203 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 23:09:05,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 11:09:05 BoogieIcfgContainer [2021-10-28 23:09:05,206 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 23:09:05,207 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 23:09:05,207 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 23:09:05,208 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 23:09:05,208 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:08:57" (3/4) ... [2021-10-28 23:09:05,211 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 23:09:05,218 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id2 [2021-10-28 23:09:05,219 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2021-10-28 23:09:05,224 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-10-28 23:09:05,228 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-28 23:09:05,228 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 23:09:05,229 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 23:09:05,266 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee5024f-22cf-4222-8495-ced05306c9b4/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-28 23:09:05,267 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 23:09:05,268 INFO L168 Benchmark]: Toolchain (without parser) took 8745.70 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 74.8 MB in the beginning and 78.8 MB in the end (delta: -3.9 MB). Peak memory consumption was 19.0 MB. Max. memory is 16.1 GB. [2021-10-28 23:09:05,269 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 111.1 MB. Free memory is still 91.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:09:05,270 INFO L168 Benchmark]: CACSL2BoogieTranslator took 365.55 ms. Allocated memory is still 111.1 MB. Free memory was 74.6 MB in the beginning and 87.6 MB in the end (delta: -13.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 23:09:05,270 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.43 ms. Allocated memory is still 111.1 MB. Free memory was 87.6 MB in the beginning and 86.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:09:05,271 INFO L168 Benchmark]: Boogie Preprocessor took 23.04 ms. Allocated memory is still 111.1 MB. Free memory was 86.3 MB in the beginning and 85.3 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:09:05,271 INFO L168 Benchmark]: RCFGBuilder took 421.39 ms. Allocated memory is still 111.1 MB. Free memory was 85.3 MB in the beginning and 75.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 23:09:05,272 INFO L168 Benchmark]: TraceAbstraction took 7825.74 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 75.4 MB in the beginning and 81.9 MB in the end (delta: -6.5 MB). Peak memory consumption was 17.6 MB. Max. memory is 16.1 GB. [2021-10-28 23:09:05,272 INFO L168 Benchmark]: Witness Printer took 59.71 ms. Allocated memory is still 134.2 MB. Free memory was 81.9 MB in the beginning and 78.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 23:09:05,275 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 111.1 MB. Free memory is still 91.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 365.55 ms. Allocated memory is still 111.1 MB. Free memory was 74.6 MB in the beginning and 87.6 MB in the end (delta: -13.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.43 ms. Allocated memory is still 111.1 MB. Free memory was 87.6 MB in the beginning and 86.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.04 ms. Allocated memory is still 111.1 MB. Free memory was 86.3 MB in the beginning and 85.3 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 421.39 ms. Allocated memory is still 111.1 MB. Free memory was 85.3 MB in the beginning and 75.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 7825.74 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 75.4 MB in the beginning and 81.9 MB in the end (delta: -6.5 MB). Peak memory consumption was 17.6 MB. Max. memory is 16.1 GB. * Witness Printer took 59.71 ms. Allocated memory is still 134.2 MB. Free memory was 81.9 MB in the beginning and 78.8 MB in the end (delta: 3.1 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, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 23]: 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 3 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.7s, OverallIterations: 8, TraceHistogramMax: 4, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 154 SDtfs, 110 SDslu, 924 SDs, 0 SdLazy, 511 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 384 GetRequests, 272 SyntacticMatches, 4 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=6, InterpolantAutomatonStates: 79, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 40 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 7 PreInvPairs, 7 NumberOfFragments, 15 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 8 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.7s InterpolantComputationTime, 470 NumberOfCodeBlocks, 470 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 456 ConstructedInterpolants, 0 QuantifiedInterpolants, 1222 SizeOfPredicates, 28 NumberOfNonLiveVariables, 690 ConjunctsInSsa, 91 ConjunctsInUnsatCore, 14 InterpolantComputations, 4 PerfectInterpolantSequences, 282/360 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-28 23:09:05,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee5024f-22cf-4222-8495-ced05306c9b4/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...