./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_init2_ground-2.i --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_f1d6bed5-8b7d-4e98-a5c6-7dfb3fc0aab8/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d6bed5-8b7d-4e98-a5c6-7dfb3fc0aab8/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_f1d6bed5-8b7d-4e98-a5c6-7dfb3fc0aab8/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d6bed5-8b7d-4e98-a5c6-7dfb3fc0aab8/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_init2_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d6bed5-8b7d-4e98-a5c6-7dfb3fc0aab8/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_f1d6bed5-8b7d-4e98-a5c6-7dfb3fc0aab8/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 18f709bee75406c3f211c93c909141f7168d3f312ff9a7046aa99aa41dbcf33f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 05:00:54,918 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 05:00:54,920 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 05:00:54,988 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 05:00:54,990 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 05:00:54,996 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 05:00:54,998 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 05:00:55,003 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 05:00:55,006 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 05:00:55,015 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 05:00:55,017 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 05:00:55,018 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 05:00:55,020 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 05:00:55,023 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 05:00:55,026 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 05:00:55,033 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 05:00:55,036 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 05:00:55,038 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 05:00:55,042 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 05:00:55,047 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 05:00:55,055 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 05:00:55,057 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 05:00:55,059 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 05:00:55,062 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 05:00:55,070 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 05:00:55,070 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 05:00:55,071 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 05:00:55,073 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 05:00:55,074 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 05:00:55,076 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 05:00:55,077 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 05:00:55,078 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 05:00:55,080 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 05:00:55,082 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 05:00:55,084 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 05:00:55,085 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 05:00:55,086 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 05:00:55,086 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 05:00:55,086 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 05:00:55,088 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 05:00:55,089 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 05:00:55,090 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d6bed5-8b7d-4e98-a5c6-7dfb3fc0aab8/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-19 05:00:55,152 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 05:00:55,155 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 05:00:55,155 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 05:00:55,156 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 05:00:55,164 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 05:00:55,165 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 05:00:55,166 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 05:00:55,166 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 05:00:55,167 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 05:00:55,167 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 05:00:55,168 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 05:00:55,169 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 05:00:55,169 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 05:00:55,169 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 05:00:55,169 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 05:00:55,170 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 05:00:55,170 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 05:00:55,170 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 05:00:55,170 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 05:00:55,171 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 05:00:55,171 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 05:00:55,171 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 05:00:55,171 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 05:00:55,172 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 05:00:55,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:00:55,172 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 05:00:55,172 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 05:00:55,173 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 05:00:55,173 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 05:00:55,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 05:00:55,173 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 05:00:55,174 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 05:00:55,174 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 05:00:55,175 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 05:00:55,175 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_f1d6bed5-8b7d-4e98-a5c6-7dfb3fc0aab8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d6bed5-8b7d-4e98-a5c6-7dfb3fc0aab8/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 18f709bee75406c3f211c93c909141f7168d3f312ff9a7046aa99aa41dbcf33f [2021-11-19 05:00:55,551 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 05:00:55,592 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 05:00:55,595 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 05:00:55,597 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 05:00:55,598 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 05:00:55,600 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d6bed5-8b7d-4e98-a5c6-7dfb3fc0aab8/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/array-examples/standard_init2_ground-2.i [2021-11-19 05:00:55,707 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d6bed5-8b7d-4e98-a5c6-7dfb3fc0aab8/bin/uautomizer-ZXIjhQolGL/data/04bb78e7e/e92be4f1fe1c4b60ae9cbacc9b245e68/FLAG39966bf70 [2021-11-19 05:00:56,405 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 05:00:56,407 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d6bed5-8b7d-4e98-a5c6-7dfb3fc0aab8/sv-benchmarks/c/array-examples/standard_init2_ground-2.i [2021-11-19 05:00:56,421 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d6bed5-8b7d-4e98-a5c6-7dfb3fc0aab8/bin/uautomizer-ZXIjhQolGL/data/04bb78e7e/e92be4f1fe1c4b60ae9cbacc9b245e68/FLAG39966bf70 [2021-11-19 05:00:56,753 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d6bed5-8b7d-4e98-a5c6-7dfb3fc0aab8/bin/uautomizer-ZXIjhQolGL/data/04bb78e7e/e92be4f1fe1c4b60ae9cbacc9b245e68 [2021-11-19 05:00:56,756 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 05:00:56,757 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 05:00:56,759 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 05:00:56,759 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 05:00:56,762 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 05:00:56,763 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:00:56" (1/1) ... [2021-11-19 05:00:56,764 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b077dc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:56, skipping insertion in model container [2021-11-19 05:00:56,765 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:00:56" (1/1) ... [2021-11-19 05:00:56,773 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 05:00:56,790 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 05:00:56,958 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_f1d6bed5-8b7d-4e98-a5c6-7dfb3fc0aab8/sv-benchmarks/c/array-examples/standard_init2_ground-2.i[816,829] [2021-11-19 05:00:56,974 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:00:56,984 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 05:00:57,000 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_f1d6bed5-8b7d-4e98-a5c6-7dfb3fc0aab8/sv-benchmarks/c/array-examples/standard_init2_ground-2.i[816,829] [2021-11-19 05:00:57,008 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:00:57,026 INFO L208 MainTranslator]: Completed translation [2021-11-19 05:00:57,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:57 WrapperNode [2021-11-19 05:00:57,027 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 05:00:57,028 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 05:00:57,029 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 05:00:57,029 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 05:00:57,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:57" (1/1) ... [2021-11-19 05:00:57,047 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:57" (1/1) ... [2021-11-19 05:00:57,070 INFO L137 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 47 [2021-11-19 05:00:57,071 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 05:00:57,072 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 05:00:57,072 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 05:00:57,072 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 05:00:57,082 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:57" (1/1) ... [2021-11-19 05:00:57,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:57" (1/1) ... [2021-11-19 05:00:57,085 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:57" (1/1) ... [2021-11-19 05:00:57,085 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:57" (1/1) ... [2021-11-19 05:00:57,091 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:57" (1/1) ... [2021-11-19 05:00:57,096 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:57" (1/1) ... [2021-11-19 05:00:57,098 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:57" (1/1) ... [2021-11-19 05:00:57,100 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 05:00:57,101 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 05:00:57,102 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 05:00:57,102 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 05:00:57,103 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:57" (1/1) ... [2021-11-19 05:00:57,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:00:57,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d6bed5-8b7d-4e98-a5c6-7dfb3fc0aab8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:00:57,142 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d6bed5-8b7d-4e98-a5c6-7dfb3fc0aab8/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 05:00:57,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d6bed5-8b7d-4e98-a5c6-7dfb3fc0aab8/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 05:00:57,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 05:00:57,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 05:00:57,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 05:00:57,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-19 05:00:57,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 05:00:57,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 05:00:57,206 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-19 05:00:57,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 05:00:57,290 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 05:00:57,292 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 05:00:57,486 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 05:00:57,493 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 05:00:57,494 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-19 05:00:57,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:00:57 BoogieIcfgContainer [2021-11-19 05:00:57,496 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 05:00:57,498 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 05:00:57,499 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 05:00:57,503 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 05:00:57,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:00:56" (1/3) ... [2021-11-19 05:00:57,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eb52543 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:00:57, skipping insertion in model container [2021-11-19 05:00:57,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:57" (2/3) ... [2021-11-19 05:00:57,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eb52543 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:00:57, skipping insertion in model container [2021-11-19 05:00:57,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:00:57" (3/3) ... [2021-11-19 05:00:57,508 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init2_ground-2.i [2021-11-19 05:00:57,515 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 05:00:57,516 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 05:00:57,574 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 05:00:57,583 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 05:00:57,583 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 05:00:57,613 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 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 05:00:57,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-19 05:00:57,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:00:57,622 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:00:57,660 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:00:57,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:00:57,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1157636873, now seen corresponding path program 1 times [2021-11-19 05:00:57,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:00:57,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157224329] [2021-11-19 05:00:57,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:00:57,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:00:57,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:00:57,952 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 05:00:57,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:00:57,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157224329] [2021-11-19 05:00:57,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157224329] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:00:57,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:00:57,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 05:00:57,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479819793] [2021-11-19 05:00:57,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:00:57,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:00:57,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:00:57,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:00:57,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:00:58,002 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 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 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 05:00:58,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:00:58,058 INFO L93 Difference]: Finished difference Result 31 states and 45 transitions. [2021-11-19 05:00:58,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:00:58,062 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2021-11-19 05:00:58,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:00:58,071 INFO L225 Difference]: With dead ends: 31 [2021-11-19 05:00:58,072 INFO L226 Difference]: Without dead ends: 14 [2021-11-19 05:00:58,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 05:00:58,080 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:00:58,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 05:00:58,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-19 05:00:58,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-19 05:00:58,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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 05:00:58,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-11-19 05:00:58,118 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2021-11-19 05:00:58,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:00:58,119 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-11-19 05:00:58,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 05:00:58,119 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-11-19 05:00:58,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-19 05:00:58,120 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:00:58,120 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:00:58,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 05:00:58,121 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:00:58,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:00:58,122 INFO L85 PathProgramCache]: Analyzing trace with hash 970257334, now seen corresponding path program 1 times [2021-11-19 05:00:58,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:00:58,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734770408] [2021-11-19 05:00:58,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:00:58,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:00:58,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:00:58,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:00:58,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:00:58,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734770408] [2021-11-19 05:00:58,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734770408] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:00:58,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069125161] [2021-11-19 05:00:58,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:00:58,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:00:58,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d6bed5-8b7d-4e98-a5c6-7dfb3fc0aab8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:00:58,180 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d6bed5-8b7d-4e98-a5c6-7dfb3fc0aab8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:00:58,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d6bed5-8b7d-4e98-a5c6-7dfb3fc0aab8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 05:00:58,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:00:58,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 05:00:58,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:00:58,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:00:58,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:00:58,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:00:58,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069125161] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:00:58,510 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:00:58,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-19 05:00:58,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148685137] [2021-11-19 05:00:58,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:00:58,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 05:00:58,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:00:58,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 05:00:58,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-19 05:00:58,514 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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 05:00:58,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:00:58,558 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2021-11-19 05:00:58,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 05:00:58,561 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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 11 [2021-11-19 05:00:58,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:00:58,562 INFO L225 Difference]: With dead ends: 30 [2021-11-19 05:00:58,562 INFO L226 Difference]: Without dead ends: 20 [2021-11-19 05:00:58,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-19 05:00:58,565 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:00:58,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 05:00:58,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-19 05:00:58,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-19 05:00:58,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 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 05:00:58,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-11-19 05:00:58,581 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 11 [2021-11-19 05:00:58,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:00:58,581 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-11-19 05:00:58,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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 05:00:58,582 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-11-19 05:00:58,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-19 05:00:58,583 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:00:58,583 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:00:58,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d6bed5-8b7d-4e98-a5c6-7dfb3fc0aab8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 05:00:58,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d6bed5-8b7d-4e98-a5c6-7dfb3fc0aab8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:00:58,784 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:00:58,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:00:58,785 INFO L85 PathProgramCache]: Analyzing trace with hash -57021897, now seen corresponding path program 2 times [2021-11-19 05:00:58,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:00:58,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309629013] [2021-11-19 05:00:58,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:00:58,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:00:58,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:00:58,947 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 05:00:58,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:00:58,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309629013] [2021-11-19 05:00:58,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309629013] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:00:58,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618009873] [2021-11-19 05:00:58,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:00:58,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:00:58,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d6bed5-8b7d-4e98-a5c6-7dfb3fc0aab8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:00:58,959 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d6bed5-8b7d-4e98-a5c6-7dfb3fc0aab8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:00:58,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d6bed5-8b7d-4e98-a5c6-7dfb3fc0aab8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 05:00:59,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:00:59,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:00:59,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 05:00:59,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:00:59,070 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 05:00:59,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:00:59,241 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 05:00:59,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618009873] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:00:59,241 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:00:59,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-11-19 05:00:59,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163826410] [2021-11-19 05:00:59,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:00:59,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 05:00:59,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:00:59,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 05:00:59,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-19 05:00:59,245 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 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 05:00:59,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:00:59,329 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2021-11-19 05:00:59,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 05:00:59,330 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 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 17 [2021-11-19 05:00:59,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:00:59,331 INFO L225 Difference]: With dead ends: 45 [2021-11-19 05:00:59,331 INFO L226 Difference]: Without dead ends: 32 [2021-11-19 05:00:59,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-19 05:00:59,334 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:00:59,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 52 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:00:59,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-19 05:00:59,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-19 05:00:59,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 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 05:00:59,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-11-19 05:00:59,357 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 17 [2021-11-19 05:00:59,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:00:59,358 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-11-19 05:00:59,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 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 05:00:59,358 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-11-19 05:00:59,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-19 05:00:59,360 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:00:59,360 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:00:59,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d6bed5-8b7d-4e98-a5c6-7dfb3fc0aab8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-19 05:00:59,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d6bed5-8b7d-4e98-a5c6-7dfb3fc0aab8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:00:59,576 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:00:59,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:00:59,577 INFO L85 PathProgramCache]: Analyzing trace with hash 163359255, now seen corresponding path program 3 times [2021-11-19 05:00:59,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:00:59,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989720334] [2021-11-19 05:00:59,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:00:59,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:00:59,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:00:59,903 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-19 05:00:59,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:00:59,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989720334] [2021-11-19 05:00:59,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989720334] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:00:59,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86484545] [2021-11-19 05:00:59,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 05:00:59,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:00:59,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d6bed5-8b7d-4e98-a5c6-7dfb3fc0aab8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:00:59,915 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d6bed5-8b7d-4e98-a5c6-7dfb3fc0aab8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:00:59,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d6bed5-8b7d-4e98-a5c6-7dfb3fc0aab8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 05:01:00,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-19 05:01:00,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:01:00,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 05:01:00,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:01:00,370 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-19 05:01:00,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:01:00,704 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-19 05:01:00,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86484545] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:01:00,704 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:01:00,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-11-19 05:01:00,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723808945] [2021-11-19 05:01:00,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:01:00,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-19 05:01:00,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:00,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-19 05:01:00,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-19 05:01:00,714 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 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 05:01:00,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:00,909 INFO L93 Difference]: Finished difference Result 75 states and 102 transitions. [2021-11-19 05:01:00,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-19 05:01:00,911 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 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 29 [2021-11-19 05:01:00,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:00,918 INFO L225 Difference]: With dead ends: 75 [2021-11-19 05:01:00,918 INFO L226 Difference]: Without dead ends: 56 [2021-11-19 05:01:00,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-19 05:01:00,926 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:00,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:01:00,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-19 05:01:00,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-11-19 05:01:00,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 55 states have internal predecessors, (58), 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 05:01:00,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2021-11-19 05:01:00,956 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 29 [2021-11-19 05:01:00,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:00,956 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2021-11-19 05:01:00,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 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 05:01:00,957 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2021-11-19 05:01:00,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-19 05:01:00,959 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:00,959 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:01,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d6bed5-8b7d-4e98-a5c6-7dfb3fc0aab8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 05:01:01,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d6bed5-8b7d-4e98-a5c6-7dfb3fc0aab8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-11-19 05:01:01,160 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:01:01,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:01,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1745445335, now seen corresponding path program 4 times [2021-11-19 05:01:01,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:01,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211327874] [2021-11-19 05:01:01,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:01,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:01,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:01,780 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-19 05:01:01,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:01,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211327874] [2021-11-19 05:01:01,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211327874] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:01:01,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966250213] [2021-11-19 05:01:01,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 05:01:01,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:01:01,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d6bed5-8b7d-4e98-a5c6-7dfb3fc0aab8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:01:01,783 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d6bed5-8b7d-4e98-a5c6-7dfb3fc0aab8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:01:01,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d6bed5-8b7d-4e98-a5c6-7dfb3fc0aab8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 05:01:01,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 05:01:01,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:01:01,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-19 05:01:01,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:01:02,094 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-19 05:01:02,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:01:03,173 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-19 05:01:03,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966250213] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:01:03,173 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:01:03,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2021-11-19 05:01:03,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090821355] [2021-11-19 05:01:03,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:01:03,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-19 05:01:03,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:03,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-19 05:01:03,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-19 05:01:03,178 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 49 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 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 05:01:03,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:03,592 INFO L93 Difference]: Finished difference Result 135 states and 186 transitions. [2021-11-19 05:01:03,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-19 05:01:03,593 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 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 53 [2021-11-19 05:01:03,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:03,599 INFO L225 Difference]: With dead ends: 135 [2021-11-19 05:01:03,599 INFO L226 Difference]: Without dead ends: 104 [2021-11-19 05:01:03,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-19 05:01:03,602 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:03,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 52 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 05:01:03,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-19 05:01:03,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2021-11-19 05:01:03,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.029126213592233) internal successors, (106), 103 states have internal predecessors, (106), 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 05:01:03,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2021-11-19 05:01:03,634 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 53 [2021-11-19 05:01:03,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:03,635 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2021-11-19 05:01:03,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 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 05:01:03,635 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2021-11-19 05:01:03,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-19 05:01:03,641 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:03,643 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:03,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d6bed5-8b7d-4e98-a5c6-7dfb3fc0aab8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 05:01:03,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d6bed5-8b7d-4e98-a5c6-7dfb3fc0aab8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:01:03,858 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:01:03,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:03,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1914155351, now seen corresponding path program 5 times [2021-11-19 05:01:03,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:03,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227531286] [2021-11-19 05:01:03,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:03,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:03,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:05,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2021-11-19 05:01:05,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:05,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227531286] [2021-11-19 05:01:05,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227531286] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:01:05,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885360046] [2021-11-19 05:01:05,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 05:01:05,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:01:05,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d6bed5-8b7d-4e98-a5c6-7dfb3fc0aab8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:01:05,206 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d6bed5-8b7d-4e98-a5c6-7dfb3fc0aab8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:01:05,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d6bed5-8b7d-4e98-a5c6-7dfb3fc0aab8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process