./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/simple_4-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1c3ac9-c225-4fe8-a80d-24bf70752f59/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1c3ac9-c225-4fe8-a80d-24bf70752f59/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1c3ac9-c225-4fe8-a80d-24bf70752f59/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1c3ac9-c225-4fe8-a80d-24bf70752f59/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-acceleration/simple_4-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1c3ac9-c225-4fe8-a80d-24bf70752f59/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1c3ac9-c225-4fe8-a80d-24bf70752f59/bin/uautomizer-ZXIjhQolGL --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 9950a3ef699b75b517ce9b65b2c32dbbe13ac0a027bb7e02ceeaeee924f6aade --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 04:52:15,805 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 04:52:15,807 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 04:52:15,876 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 04:52:15,877 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 04:52:15,880 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 04:52:15,883 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 04:52:15,886 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 04:52:15,889 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 04:52:15,890 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 04:52:15,892 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 04:52:15,894 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 04:52:15,895 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 04:52:15,897 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 04:52:15,899 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 04:52:15,901 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 04:52:15,902 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 04:52:15,904 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 04:52:15,906 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 04:52:15,910 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 04:52:15,912 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 04:52:15,914 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 04:52:15,916 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 04:52:15,917 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 04:52:15,922 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 04:52:15,923 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 04:52:15,923 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 04:52:15,925 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 04:52:15,926 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 04:52:15,927 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 04:52:15,928 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 04:52:15,929 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 04:52:15,930 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 04:52:15,932 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 04:52:15,933 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 04:52:15,934 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 04:52:15,935 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 04:52:15,936 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 04:52:15,936 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 04:52:15,938 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 04:52:15,939 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 04:52:15,940 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1c3ac9-c225-4fe8-a80d-24bf70752f59/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-19 04:52:15,972 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 04:52:15,972 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 04:52:15,973 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 04:52:15,973 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 04:52:15,974 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 04:52:15,974 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 04:52:15,975 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 04:52:15,975 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 04:52:15,976 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 04:52:15,976 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 04:52:15,977 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 04:52:15,977 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 04:52:15,977 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 04:52:15,978 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 04:52:15,978 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 04:52:15,978 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 04:52:15,979 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 04:52:15,979 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 04:52:15,979 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 04:52:15,980 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 04:52:15,980 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 04:52:15,980 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 04:52:15,981 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 04:52:15,981 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 04:52:15,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:52:15,982 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 04:52:15,982 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 04:52:15,983 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 04:52:15,983 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 04:52:15,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 04:52:15,984 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 04:52:15,984 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 04:52:15,984 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 04:52:15,985 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 04:52:15,985 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_df1c3ac9-c225-4fe8-a80d-24bf70752f59/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1c3ac9-c225-4fe8-a80d-24bf70752f59/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9950a3ef699b75b517ce9b65b2c32dbbe13ac0a027bb7e02ceeaeee924f6aade [2021-11-19 04:52:16,328 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 04:52:16,365 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 04:52:16,369 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 04:52:16,370 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 04:52:16,371 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 04:52:16,374 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1c3ac9-c225-4fe8-a80d-24bf70752f59/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/loop-acceleration/simple_4-1.c [2021-11-19 04:52:16,457 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1c3ac9-c225-4fe8-a80d-24bf70752f59/bin/uautomizer-ZXIjhQolGL/data/44d34965c/b4110f6fcff34c11961ffd29d8236a39/FLAG935695208 [2021-11-19 04:52:16,936 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 04:52:16,937 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1c3ac9-c225-4fe8-a80d-24bf70752f59/sv-benchmarks/c/loop-acceleration/simple_4-1.c [2021-11-19 04:52:16,946 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1c3ac9-c225-4fe8-a80d-24bf70752f59/bin/uautomizer-ZXIjhQolGL/data/44d34965c/b4110f6fcff34c11961ffd29d8236a39/FLAG935695208 [2021-11-19 04:52:17,311 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1c3ac9-c225-4fe8-a80d-24bf70752f59/bin/uautomizer-ZXIjhQolGL/data/44d34965c/b4110f6fcff34c11961ffd29d8236a39 [2021-11-19 04:52:17,314 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 04:52:17,316 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 04:52:17,321 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 04:52:17,322 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 04:52:17,325 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 04:52:17,326 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:52:17" (1/1) ... [2021-11-19 04:52:17,327 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ce8d3e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:17, skipping insertion in model container [2021-11-19 04:52:17,328 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:52:17" (1/1) ... [2021-11-19 04:52:17,336 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 04:52:17,346 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 04:52:17,515 WARN L230 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_df1c3ac9-c225-4fe8-a80d-24bf70752f59/sv-benchmarks/c/loop-acceleration/simple_4-1.c[322,335] [2021-11-19 04:52:17,523 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:52:17,532 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 04:52:17,546 WARN L230 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_df1c3ac9-c225-4fe8-a80d-24bf70752f59/sv-benchmarks/c/loop-acceleration/simple_4-1.c[322,335] [2021-11-19 04:52:17,549 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:52:17,565 INFO L208 MainTranslator]: Completed translation [2021-11-19 04:52:17,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:17 WrapperNode [2021-11-19 04:52:17,566 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 04:52:17,567 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 04:52:17,567 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 04:52:17,568 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 04:52:17,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:17" (1/1) ... [2021-11-19 04:52:17,585 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:17" (1/1) ... [2021-11-19 04:52:17,604 INFO L137 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 23 [2021-11-19 04:52:17,604 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 04:52:17,605 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 04:52:17,605 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 04:52:17,605 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 04:52:17,614 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:17" (1/1) ... [2021-11-19 04:52:17,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:17" (1/1) ... [2021-11-19 04:52:17,615 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:17" (1/1) ... [2021-11-19 04:52:17,615 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:17" (1/1) ... [2021-11-19 04:52:17,618 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:17" (1/1) ... [2021-11-19 04:52:17,621 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:17" (1/1) ... [2021-11-19 04:52:17,622 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:17" (1/1) ... [2021-11-19 04:52:17,624 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 04:52:17,625 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 04:52:17,625 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 04:52:17,625 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 04:52:17,626 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:17" (1/1) ... [2021-11-19 04:52:17,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:52:17,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1c3ac9-c225-4fe8-a80d-24bf70752f59/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:52:17,669 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1c3ac9-c225-4fe8-a80d-24bf70752f59/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 04:52:17,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1c3ac9-c225-4fe8-a80d-24bf70752f59/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 04:52:17,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 04:52:17,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 04:52:17,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 04:52:17,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 04:52:17,794 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 04:52:17,797 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 04:52:17,928 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 04:52:17,937 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 04:52:17,938 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 04:52:17,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:52:17 BoogieIcfgContainer [2021-11-19 04:52:17,941 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 04:52:17,943 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 04:52:17,944 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 04:52:17,948 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 04:52:17,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:52:17" (1/3) ... [2021-11-19 04:52:17,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39786260 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:52:17, skipping insertion in model container [2021-11-19 04:52:17,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:17" (2/3) ... [2021-11-19 04:52:17,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39786260 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:52:17, skipping insertion in model container [2021-11-19 04:52:17,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:52:17" (3/3) ... [2021-11-19 04:52:17,953 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_4-1.c [2021-11-19 04:52:17,960 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 04:52:17,961 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 04:52:18,018 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 04:52:18,027 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 [2021-11-19 04:52:18,027 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 04:52:18,043 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 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) [2021-11-19 04:52:18,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-19 04:52:18,049 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:18,049 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-19 04:52:18,050 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:18,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:18,056 INFO L85 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2021-11-19 04:52:18,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:18,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518154076] [2021-11-19 04:52:18,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:18,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:18,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:18,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:52:18,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:18,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518154076] [2021-11-19 04:52:18,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518154076] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:18,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:18,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:52:18,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37951008] [2021-11-19 04:52:18,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:18,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:52:18,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:18,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:52:18,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:52:18,358 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 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) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-11-19 04:52:18,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:18,387 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2021-11-19 04:52:18,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:52:18,390 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) Word has length 6 [2021-11-19 04:52:18,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:18,400 INFO L225 Difference]: With dead ends: 20 [2021-11-19 04:52:18,400 INFO L226 Difference]: Without dead ends: 8 [2021-11-19 04:52:18,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:52:18,433 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:18,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:52:18,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-11-19 04:52:18,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-11-19 04:52:18,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 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) [2021-11-19 04:52:18,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-11-19 04:52:18,507 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-11-19 04:52:18,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:18,508 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-11-19 04:52:18,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-11-19 04:52:18,508 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-11-19 04:52:18,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-19 04:52:18,509 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:18,509 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:18,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 04:52:18,510 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:18,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:18,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2021-11-19 04:52:18,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:18,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957192632] [2021-11-19 04:52:18,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:18,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:18,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:18,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:52:18,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:18,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957192632] [2021-11-19 04:52:18,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957192632] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:52:18,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849508216] [2021-11-19 04:52:18,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:18,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:52:18,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1c3ac9-c225-4fe8-a80d-24bf70752f59/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:52:18,630 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1c3ac9-c225-4fe8-a80d-24bf70752f59/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:52:18,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1c3ac9-c225-4fe8-a80d-24bf70752f59/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 04:52:18,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:18,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 04:52:18,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:52:18,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:52:18,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:52:18,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:52:18,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849508216] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:52:18,962 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:52:18,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-19 04:52:18,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811465080] [2021-11-19 04:52:18,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:52:18,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 04:52:18,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:18,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 04:52:18,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:52:18,978 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 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) [2021-11-19 04:52:19,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:19,030 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2021-11-19 04:52:19,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:52:19,031 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 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) Word has length 7 [2021-11-19 04:52:19,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:19,032 INFO L225 Difference]: With dead ends: 15 [2021-11-19 04:52:19,032 INFO L226 Difference]: Without dead ends: 11 [2021-11-19 04:52:19,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:52:19,036 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:19,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:52:19,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-19 04:52:19,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-19 04:52:19,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 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) [2021-11-19 04:52:19,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-11-19 04:52:19,043 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2021-11-19 04:52:19,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:19,044 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-11-19 04:52:19,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 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) [2021-11-19 04:52:19,045 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-11-19 04:52:19,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-19 04:52:19,046 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:19,046 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:19,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1c3ac9-c225-4fe8-a80d-24bf70752f59/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 04:52:19,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1c3ac9-c225-4fe8-a80d-24bf70752f59/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:52:19,269 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:19,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:19,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1922847381, now seen corresponding path program 2 times [2021-11-19 04:52:19,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:19,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463790041] [2021-11-19 04:52:19,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:19,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:19,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:19,464 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:52:19,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:19,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463790041] [2021-11-19 04:52:19,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463790041] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:52:19,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814610977] [2021-11-19 04:52:19,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:52:19,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:52:19,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1c3ac9-c225-4fe8-a80d-24bf70752f59/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:52:19,468 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1c3ac9-c225-4fe8-a80d-24bf70752f59/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:52:19,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1c3ac9-c225-4fe8-a80d-24bf70752f59/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 04:52:19,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:52:19,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:52:19,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 04:52:19,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:52:19,662 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:52:19,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:52:19,866 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:52:19,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814610977] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:52:19,867 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:52:19,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-11-19 04:52:19,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512777628] [2021-11-19 04:52:19,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:52:19,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 04:52:19,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:19,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 04:52:19,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:52:19,877 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 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) [2021-11-19 04:52:20,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:20,382 INFO L93 Difference]: Finished difference Result 21 states and 26 transitions. [2021-11-19 04:52:20,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 04:52:20,384 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 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) Word has length 10 [2021-11-19 04:52:20,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:20,385 INFO L225 Difference]: With dead ends: 21 [2021-11-19 04:52:20,385 INFO L226 Difference]: Without dead ends: 17 [2021-11-19 04:52:20,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2021-11-19 04:52:20,388 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:20,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 15 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:52:20,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-19 04:52:20,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-19 04:52:20,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 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) [2021-11-19 04:52:20,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-11-19 04:52:20,397 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 10 [2021-11-19 04:52:20,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:20,398 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-11-19 04:52:20,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 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) [2021-11-19 04:52:20,398 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-11-19 04:52:20,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-19 04:52:20,399 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:20,399 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:20,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1c3ac9-c225-4fe8-a80d-24bf70752f59/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 04:52:20,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1c3ac9-c225-4fe8-a80d-24bf70752f59/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:52:20,617 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:20,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:20,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1628318539, now seen corresponding path program 3 times [2021-11-19 04:52:20,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:20,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294855854] [2021-11-19 04:52:20,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:20,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:20,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:21,062 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:52:21,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:21,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294855854] [2021-11-19 04:52:21,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294855854] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:52:21,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691276676] [2021-11-19 04:52:21,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:52:21,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:52:21,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1c3ac9-c225-4fe8-a80d-24bf70752f59/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:52:21,067 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1c3ac9-c225-4fe8-a80d-24bf70752f59/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:52:21,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1c3ac9-c225-4fe8-a80d-24bf70752f59/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 04:52:21,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-19 04:52:21,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:52:21,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 04:52:21,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:52:21,394 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:52:21,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:52:21,922 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:52:21,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691276676] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:52:21,923 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:52:21,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-11-19 04:52:21,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504970130] [2021-11-19 04:52:21,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:52:21,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-19 04:52:21,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:21,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-19 04:52:21,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=410, Unknown=0, NotChecked=0, Total=600 [2021-11-19 04:52:21,926 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 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) [2021-11-19 04:52:35,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:35,736 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2021-11-19 04:52:35,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-19 04:52:35,738 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 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) Word has length 16 [2021-11-19 04:52:35,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:35,739 INFO L225 Difference]: With dead ends: 33 [2021-11-19 04:52:35,739 INFO L226 Difference]: Without dead ends: 29 [2021-11-19 04:52:35,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=465, Invalid=795, Unknown=0, NotChecked=0, Total=1260 [2021-11-19 04:52:35,742 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 30 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:35,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 24 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 04:52:35,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-19 04:52:35,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-19 04:52:35,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 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) [2021-11-19 04:52:35,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-11-19 04:52:35,754 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 16 [2021-11-19 04:52:35,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:35,754 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-11-19 04:52:35,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 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) [2021-11-19 04:52:35,755 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-11-19 04:52:35,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-19 04:52:35,756 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:35,757 INFO L514 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:35,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1c3ac9-c225-4fe8-a80d-24bf70752f59/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-19 04:52:35,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1c3ac9-c225-4fe8-a80d-24bf70752f59/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:52:35,959 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:35,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:35,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1394044683, now seen corresponding path program 4 times [2021-11-19 04:52:35,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:35,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566273281] [2021-11-19 04:52:35,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:35,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:36,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:36,719 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:52:36,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:36,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566273281] [2021-11-19 04:52:36,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566273281] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:52:36,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083307182] [2021-11-19 04:52:36,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:52:36,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:52:36,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1c3ac9-c225-4fe8-a80d-24bf70752f59/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:52:36,728 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1c3ac9-c225-4fe8-a80d-24bf70752f59/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:52:36,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1c3ac9-c225-4fe8-a80d-24bf70752f59/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 04:52:36,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:52:36,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:52:36,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-19 04:52:36,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:52:37,188 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:52:37,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:52:38,763 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:52:38,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083307182] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:52:38,763 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:52:38,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2021-11-19 04:52:38,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766935811] [2021-11-19 04:52:38,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:52:38,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-19 04:52:38,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:38,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-19 04:52:38,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=1682, Unknown=0, NotChecked=0, Total=2352 [2021-11-19 04:52:38,770 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 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) [2021-11-19 04:53:47,986 WARN L227 SmtUtils]: Spent 52.89s on a formula simplification that was a NOOP. DAG size: 94 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:53:49,790 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 04:53:51,814 WARN L838 $PredicateComparison]: unable to prove that (and (< 1 (mod |c_ULTIMATE.start_main_~x~0#1| 4294967296)) (< 1 (mod (+ 4294967254 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967256) 4294967296)) (< 1 (mod (+ 4294967260 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ 4294967270 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ 4294967272 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ 4294967294 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967284) 4294967296)) (< 1 (mod (+ 4294967282 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ 4294967292 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ 4294967290 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967262) 4294967296)) (< 1 (mod (+ 4294967276 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967266) 4294967296)) (< 1 (mod (+ 4294967274 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967264) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967268) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967280) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967278) 4294967296)) (< 1 (mod (+ 4294967286 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967258) 4294967296)) (< 1 (mod (+ 4294967288 |c_ULTIMATE.start_main_~x~0#1|) 4294967296))) is different from false [2021-11-19 04:53:53,833 WARN L838 $PredicateComparison]: unable to prove that (and (< 1 (mod |c_ULTIMATE.start_main_~x~0#1| 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967256) 4294967296)) (< 1 (mod (+ 4294967260 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ 4294967270 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ 4294967272 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ 4294967294 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967284) 4294967296)) (< 1 (mod (+ 4294967282 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ 4294967292 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ 4294967290 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967262) 4294967296)) (< 1 (mod (+ 4294967276 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967266) 4294967296)) (< 1 (mod (+ 4294967274 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967264) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967268) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967280) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967278) 4294967296)) (< 1 (mod (+ 4294967286 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967258) 4294967296)) (< 1 (mod (+ 4294967288 |c_ULTIMATE.start_main_~x~0#1|) 4294967296))) is different from false [2021-11-19 04:54:42,174 WARN L227 SmtUtils]: Spent 39.62s on a formula simplification that was a NOOP. DAG size: 82 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:54:46,582 WARN L838 $PredicateComparison]: unable to prove that (and (< 1 (mod |c_ULTIMATE.start_main_~x~0#1| 4294967296)) (< 1 (mod (+ 4294967260 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ 4294967270 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ 4294967272 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ 4294967294 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967284) 4294967296)) (< 1 (mod (+ 4294967282 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ 4294967292 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ 4294967290 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967262) 4294967296)) (< 1 (mod (+ 4294967276 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967266) 4294967296)) (< 1 (mod (+ 4294967274 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967264) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967268) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967280) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967278) 4294967296)) (< 1 (mod (+ 4294967286 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ 4294967288 |c_ULTIMATE.start_main_~x~0#1|) 4294967296))) is different from false [2021-11-19 04:54:48,593 WARN L838 $PredicateComparison]: unable to prove that (and (< 1 (mod |c_ULTIMATE.start_main_~x~0#1| 4294967296)) (< 1 (mod (+ 4294967270 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ 4294967272 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ 4294967294 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967284) 4294967296)) (< 1 (mod (+ 4294967282 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ 4294967292 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ 4294967290 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967262) 4294967296)) (< 1 (mod (+ 4294967276 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967266) 4294967296)) (< 1 (mod (+ 4294967274 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967264) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967268) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967280) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967278) 4294967296)) (< 1 (mod (+ 4294967286 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ 4294967288 |c_ULTIMATE.start_main_~x~0#1|) 4294967296))) is different from false [2021-11-19 04:55:21,386 WARN L227 SmtUtils]: Spent 22.72s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:55:52,654 WARN L227 SmtUtils]: Spent 19.55s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:56:18,401 WARN L227 SmtUtils]: Spent 15.92s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:56:35,590 WARN L227 SmtUtils]: Spent 8.22s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:58:04,875 WARN L227 SmtUtils]: Spent 48.39s on a formula simplification that was a NOOP. DAG size: 92 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:58:06,033 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 04:58:08,579 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 04:58:08,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:58:08,846 INFO L93 Difference]: Finished difference Result 57 states and 80 transitions. [2021-11-19 04:58:08,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-19 04:58:08,851 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 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) Word has length 28 [2021-11-19 04:58:08,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:58:08,852 INFO L225 Difference]: With dead ends: 57 [2021-11-19 04:58:08,852 INFO L226 Difference]: Without dead ends: 53 [2021-11-19 04:58:08,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 320.9s TimeCoverageRelationStatistics Valid=1543, Invalid=3025, Unknown=4, NotChecked=540, Total=5112 [2021-11-19 04:58:08,866 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 66 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:58:08,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 43 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 582 Invalid, 0 Unknown, 4 Unchecked, 11.0s Time] [2021-11-19 04:58:08,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-19 04:58:08,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-11-19 04:58:08,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:58:08,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2021-11-19 04:58:08,886 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 28 [2021-11-19 04:58:08,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:58:08,887 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2021-11-19 04:58:08,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 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) [2021-11-19 04:58:08,889 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2021-11-19 04:58:08,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-19 04:58:08,890 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:58:08,890 INFO L514 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1] [2021-11-19 04:58:08,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1c3ac9-c225-4fe8-a80d-24bf70752f59/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 04:58:09,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1c3ac9-c225-4fe8-a80d-24bf70752f59/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:58:09,091 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:58:09,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:58:09,092 INFO L85 PathProgramCache]: Analyzing trace with hash 469964427, now seen corresponding path program 5 times [2021-11-19 04:58:09,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:58:09,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204561770] [2021-11-19 04:58:09,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:58:09,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:58:09,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:58:10,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:58:10,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:58:10,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204561770] [2021-11-19 04:58:10,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204561770] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:58:10,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631334820] [2021-11-19 04:58:10,762 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 04:58:10,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:58:10,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1c3ac9-c225-4fe8-a80d-24bf70752f59/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:58:10,768 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1c3ac9-c225-4fe8-a80d-24bf70752f59/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:58:10,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1c3ac9-c225-4fe8-a80d-24bf70752f59/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process