./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/string-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/string-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ --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 fd601fa28543c13c2fbec075867019b65bb9d0c4bbf720a0162dbf887aa47892 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 10:52:17,997 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:52:18,000 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:52:18,044 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:52:18,045 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:52:18,046 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:52:18,048 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:52:18,050 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:52:18,052 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:52:18,053 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:52:18,054 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:52:18,055 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:52:18,056 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:52:18,057 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:52:18,058 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:52:18,059 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:52:18,060 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:52:18,061 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:52:18,063 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:52:18,065 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:52:18,067 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:52:18,071 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:52:18,072 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:52:18,073 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:52:18,078 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:52:18,078 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:52:18,079 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:52:18,080 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:52:18,080 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:52:18,081 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:52:18,082 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:52:18,083 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:52:18,083 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:52:18,084 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:52:18,094 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:52:18,094 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:52:18,095 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:52:18,095 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:52:18,095 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:52:18,096 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:52:18,097 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:52:18,098 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:52:18,142 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:52:18,143 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:52:18,143 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:52:18,144 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:52:18,145 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:52:18,145 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:52:18,146 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:52:18,146 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:52:18,146 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:52:18,146 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:52:18,147 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:52:18,148 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:52:18,148 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:52:18,148 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:52:18,148 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:52:18,149 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:52:18,149 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:52:18,149 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:52:18,149 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:52:18,150 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:52:18,150 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:52:18,150 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:52:18,151 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:52:18,151 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:52:18,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:52:18,151 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:52:18,153 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:52:18,153 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:52:18,176 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:52:18,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:52:18,176 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:52:18,176 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:52:18,177 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:52:18,177 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_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fd601fa28543c13c2fbec075867019b65bb9d0c4bbf720a0162dbf887aa47892 [2022-10-17 10:52:18,453 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:52:18,473 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:52:18,476 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:52:18,477 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:52:18,478 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:52:18,479 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/loops/string-2.i [2022-10-17 10:52:18,557 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/data/a7acff691/42325327d25f4c07b4d9af2f29599f3c/FLAGe73943180 [2022-10-17 10:52:18,974 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:52:18,975 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/sv-benchmarks/c/loops/string-2.i [2022-10-17 10:52:18,982 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/data/a7acff691/42325327d25f4c07b4d9af2f29599f3c/FLAGe73943180 [2022-10-17 10:52:19,368 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/data/a7acff691/42325327d25f4c07b4d9af2f29599f3c [2022-10-17 10:52:19,371 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:52:19,373 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:52:19,374 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:52:19,375 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:52:19,378 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:52:19,379 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:52:19" (1/1) ... [2022-10-17 10:52:19,380 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45a4eb35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:52:19, skipping insertion in model container [2022-10-17 10:52:19,380 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:52:19" (1/1) ... [2022-10-17 10:52:19,387 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:52:19,403 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:52:19,600 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_71e73120-24d6-4f9f-9b83-58bccdcf790f/sv-benchmarks/c/loops/string-2.i[896,909] [2022-10-17 10:52:19,625 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:52:19,636 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:52:19,656 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_71e73120-24d6-4f9f-9b83-58bccdcf790f/sv-benchmarks/c/loops/string-2.i[896,909] [2022-10-17 10:52:19,677 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:52:19,697 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:52:19,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:52:19 WrapperNode [2022-10-17 10:52:19,697 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:52:19,698 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:52:19,699 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:52:19,699 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:52:19,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:52:19" (1/1) ... [2022-10-17 10:52:19,715 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:52:19" (1/1) ... [2022-10-17 10:52:19,737 INFO L138 Inliner]: procedures = 17, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 126 [2022-10-17 10:52:19,737 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:52:19,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:52:19,738 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:52:19,738 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:52:19,747 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:52:19" (1/1) ... [2022-10-17 10:52:19,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:52:19" (1/1) ... [2022-10-17 10:52:19,749 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:52:19" (1/1) ... [2022-10-17 10:52:19,750 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:52:19" (1/1) ... [2022-10-17 10:52:19,757 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:52:19" (1/1) ... [2022-10-17 10:52:19,762 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:52:19" (1/1) ... [2022-10-17 10:52:19,764 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:52:19" (1/1) ... [2022-10-17 10:52:19,765 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:52:19" (1/1) ... [2022-10-17 10:52:19,768 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:52:19,768 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:52:19,769 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:52:19,769 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:52:19,770 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:52:19" (1/1) ... [2022-10-17 10:52:19,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:52:19,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:52:19,812 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:52:19,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:52:19,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:52:19,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:52:19,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 10:52:19,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 10:52:19,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:52:19,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:52:19,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 10:52:19,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 10:52:19,916 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:52:19,918 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:52:20,089 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:52:20,096 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:52:20,096 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-10-17 10:52:20,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:52:20 BoogieIcfgContainer [2022-10-17 10:52:20,098 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:52:20,114 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:52:20,114 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:52:20,117 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:52:20,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:52:19" (1/3) ... [2022-10-17 10:52:20,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77736004 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:52:20, skipping insertion in model container [2022-10-17 10:52:20,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:52:19" (2/3) ... [2022-10-17 10:52:20,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77736004 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:52:20, skipping insertion in model container [2022-10-17 10:52:20,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:52:20" (3/3) ... [2022-10-17 10:52:20,120 INFO L112 eAbstractionObserver]: Analyzing ICFG string-2.i [2022-10-17 10:52:20,145 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:52:20,161 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:52:20,263 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:52:20,270 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38da2526, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:52:20,270 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 10:52:20,285 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 25 states have internal predecessors, (40), 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) [2022-10-17 10:52:20,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-10-17 10:52:20,292 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:52:20,296 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:52:20,296 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:52:20,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:52:20,307 INFO L85 PathProgramCache]: Analyzing trace with hash 374782792, now seen corresponding path program 1 times [2022-10-17 10:52:20,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:52:20,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209320218] [2022-10-17 10:52:20,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:52:20,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:52:20,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:52:20,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:52:20,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:52:20,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209320218] [2022-10-17 10:52:20,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209320218] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:52:20,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:52:20,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:52:20,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56094929] [2022-10-17 10:52:20,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:52:20,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:52:20,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:52:20,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:52:20,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:52:20,572 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 25 states have internal predecessors, (40), 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 5.333333333333333) internal successors, (16), 3 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) [2022-10-17 10:52:20,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:52:20,632 INFO L93 Difference]: Finished difference Result 62 states and 95 transitions. [2022-10-17 10:52:20,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:52:20,649 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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 16 [2022-10-17 10:52:20,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:52:20,660 INFO L225 Difference]: With dead ends: 62 [2022-10-17 10:52:20,660 INFO L226 Difference]: Without dead ends: 32 [2022-10-17 10:52:20,663 INFO L412 NwaCegarLoop]: 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 [2022-10-17 10:52:20,667 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 11 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:52:20,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:52:20,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-10-17 10:52:20,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2022-10-17 10:52:20,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 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) [2022-10-17 10:52:20,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2022-10-17 10:52:20,715 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16 [2022-10-17 10:52:20,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:52:20,716 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2022-10-17 10:52:20,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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) [2022-10-17 10:52:20,717 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2022-10-17 10:52:20,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-10-17 10:52:20,718 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:52:20,718 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:52:20,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:52:20,719 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:52:20,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:52:20,720 INFO L85 PathProgramCache]: Analyzing trace with hash 177830358, now seen corresponding path program 1 times [2022-10-17 10:52:20,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:52:20,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812821088] [2022-10-17 10:52:20,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:52:20,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:52:20,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:52:20,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:52:20,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:52:20,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812821088] [2022-10-17 10:52:20,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812821088] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:52:20,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945288552] [2022-10-17 10:52:20,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:52:20,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:52:20,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:52:20,915 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:52:20,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:52:20,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:52:20,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 10:52:21,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:52:21,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:52:21,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:52:21,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:52:21,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945288552] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:52:21,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:52:21,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-10-17 10:52:21,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633213071] [2022-10-17 10:52:21,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:52:21,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 10:52:21,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:52:21,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 10:52:21,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:52:21,103 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2022-10-17 10:52:21,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:52:21,263 INFO L93 Difference]: Finished difference Result 79 states and 98 transitions. [2022-10-17 10:52:21,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:52:21,264 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) Word has length 22 [2022-10-17 10:52:21,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:52:21,265 INFO L225 Difference]: With dead ends: 79 [2022-10-17 10:52:21,265 INFO L226 Difference]: Without dead ends: 60 [2022-10-17 10:52:21,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:52:21,268 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 40 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:52:21,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 59 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:52:21,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-10-17 10:52:21,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 36. [2022-10-17 10:52:21,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 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) [2022-10-17 10:52:21,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-10-17 10:52:21,279 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 22 [2022-10-17 10:52:21,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:52:21,279 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-10-17 10:52:21,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2022-10-17 10:52:21,280 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-10-17 10:52:21,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-10-17 10:52:21,281 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:52:21,281 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:52:21,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:52:21,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-10-17 10:52:21,498 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:52:21,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:52:21,499 INFO L85 PathProgramCache]: Analyzing trace with hash -583604682, now seen corresponding path program 2 times [2022-10-17 10:52:21,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:52:21,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319144076] [2022-10-17 10:52:21,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:52:21,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:52:21,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:52:21,769 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-10-17 10:52:21,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:52:21,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319144076] [2022-10-17 10:52:21,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319144076] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:52:21,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868160800] [2022-10-17 10:52:21,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:52:21,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:52:21,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:52:21,776 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:52:21,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 10:52:21,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 10:52:21,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:52:21,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 10:52:21,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:52:21,941 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-10-17 10:52:21,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:52:22,004 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-10-17 10:52:22,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868160800] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:52:22,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:52:22,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-10-17 10:52:22,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716766130] [2022-10-17 10:52:22,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:52:22,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:52:22,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:52:22,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:52:22,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:52:22,013 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 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) [2022-10-17 10:52:22,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:52:22,141 INFO L93 Difference]: Finished difference Result 95 states and 111 transitions. [2022-10-17 10:52:22,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 10:52:22,142 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 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 34 [2022-10-17 10:52:22,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:52:22,146 INFO L225 Difference]: With dead ends: 95 [2022-10-17 10:52:22,146 INFO L226 Difference]: Without dead ends: 70 [2022-10-17 10:52:22,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:52:22,151 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 71 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:52:22,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 59 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:52:22,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-10-17 10:52:22,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 40. [2022-10-17 10:52:22,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 39 states have internal predecessors, (45), 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) [2022-10-17 10:52:22,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2022-10-17 10:52:22,171 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 34 [2022-10-17 10:52:22,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:52:22,171 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2022-10-17 10:52:22,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 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) [2022-10-17 10:52:22,172 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2022-10-17 10:52:22,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-10-17 10:52:22,173 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:52:22,173 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:52:22,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:52:22,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:52:22,389 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:52:22,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:52:22,390 INFO L85 PathProgramCache]: Analyzing trace with hash -270804906, now seen corresponding path program 3 times [2022-10-17 10:52:22,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:52:22,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876414285] [2022-10-17 10:52:22,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:52:22,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:52:22,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:52:22,440 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 10:52:22,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:52:22,545 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-10-17 10:52:22,545 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 10:52:22,547 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-10-17 10:52:22,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 10:52:22,554 INFO L444 BasicCegarLoop]: Path program histogram: [3, 1] [2022-10-17 10:52:22,558 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-10-17 10:52:22,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.10 10:52:22 BoogieIcfgContainer [2022-10-17 10:52:22,632 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-10-17 10:52:22,633 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-10-17 10:52:22,633 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-10-17 10:52:22,633 INFO L275 PluginConnector]: Witness Printer initialized [2022-10-17 10:52:22,634 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:52:20" (3/4) ... [2022-10-17 10:52:22,640 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-10-17 10:52:22,640 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-10-17 10:52:22,642 INFO L158 Benchmark]: Toolchain (without parser) took 3268.12ms. Allocated memory was 107.0MB in the beginning and 142.6MB in the end (delta: 35.7MB). Free memory was 63.1MB in the beginning and 112.4MB in the end (delta: -49.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-10-17 10:52:22,646 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 107.0MB. Free memory is still 79.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-10-17 10:52:22,646 INFO L158 Benchmark]: CACSL2BoogieTranslator took 323.49ms. Allocated memory is still 107.0MB. Free memory was 62.8MB in the beginning and 79.0MB in the end (delta: -16.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-10-17 10:52:22,647 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.79ms. Allocated memory is still 107.0MB. Free memory was 79.0MB in the beginning and 77.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-10-17 10:52:22,647 INFO L158 Benchmark]: Boogie Preprocessor took 29.89ms. Allocated memory is still 107.0MB. Free memory was 77.3MB in the beginning and 75.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-10-17 10:52:22,649 INFO L158 Benchmark]: RCFGBuilder took 329.99ms. Allocated memory is still 107.0MB. Free memory was 75.9MB in the beginning and 63.7MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-10-17 10:52:22,650 INFO L158 Benchmark]: TraceAbstraction took 2518.50ms. Allocated memory was 107.0MB in the beginning and 142.6MB in the end (delta: 35.7MB). Free memory was 63.0MB in the beginning and 112.4MB in the end (delta: -49.4MB). Peak memory consumption was 50.3MB. Max. memory is 16.1GB. [2022-10-17 10:52:22,651 INFO L158 Benchmark]: Witness Printer took 7.15ms. Allocated memory is still 142.6MB. Free memory is still 112.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-10-17 10:52:22,656 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 107.0MB. Free memory is still 79.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 323.49ms. Allocated memory is still 107.0MB. Free memory was 62.8MB in the beginning and 79.0MB in the end (delta: -16.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.79ms. Allocated memory is still 107.0MB. Free memory was 79.0MB in the beginning and 77.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.89ms. Allocated memory is still 107.0MB. Free memory was 77.3MB in the beginning and 75.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 329.99ms. Allocated memory is still 107.0MB. Free memory was 75.9MB in the beginning and 63.7MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 2518.50ms. Allocated memory was 107.0MB in the beginning and 142.6MB in the end (delta: 35.7MB). Free memory was 63.0MB in the beginning and 112.4MB in the end (delta: -49.4MB). Peak memory consumption was 50.3MB. Max. memory is 16.1GB. * Witness Printer took 7.15ms. Allocated memory is still 142.6MB. Free memory is still 112.4MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of shiftLeft at line 69. Possible FailurePath: [L31] char string_A[5], string_B[5]; [L32] int i, j, nc_A, nc_B, found=0; [L35] i=0 VAL [found=0, i=0, string_A={6:0}, string_B={7:0}] [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ VAL [found=0, i=1, string_A={6:0}, string_B={7:0}] [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ VAL [found=0, i=2, string_A={6:0}, string_B={7:0}] [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ VAL [found=0, i=3, string_A={6:0}, string_B={7:0}] [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ VAL [found=0, i=4, string_A={6:0}, string_B={7:0}] [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ VAL [found=0, i=5, string_A={6:0}, string_B={7:0}] [L35] COND FALSE !(i<5) VAL [found=0, i=5, string_A={6:0}, string_B={7:0}] [L37] EXPR string_A[5 -1] VAL [found=0, i=5, string_A={6:0}, string_A[5 -1]=0, string_B={7:0}] [L37] COND FALSE !(!(string_A[5 -1]=='\0')) [L39] i=0 VAL [found=0, i=0, string_A={6:0}, string_B={7:0}] [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ VAL [found=0, i=1, string_A={6:0}, string_B={7:0}] [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ VAL [found=0, i=2, string_A={6:0}, string_B={7:0}] [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ VAL [found=0, i=3, string_A={6:0}, string_B={7:0}] [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ VAL [found=0, i=4, string_A={6:0}, string_B={7:0}] [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ VAL [found=0, i=5, string_A={6:0}, string_B={7:0}] [L39] COND FALSE !(i<5) VAL [found=0, i=5, string_A={6:0}, string_B={7:0}] [L41] EXPR string_B[5 -1] VAL [found=0, i=5, string_A={6:0}, string_B={7:0}, string_B[5 -1]=0] [L41] COND FALSE !(!(string_B[5 -1]=='\0')) [L43] nc_A = 0 VAL [found=0, i=5, nc_A=0, string_A={6:0}, string_B={7:0}] [L44] EXPR string_A[nc_A] VAL [found=0, i=5, nc_A=0, string_A={6:0}, string_A[nc_A]=0, string_B={7:0}] [L44] COND FALSE !(string_A[nc_A]!='\0') [L47] nc_B = 0 VAL [found=0, i=5, nc_A=0, nc_B=0, string_A={6:0}, string_B={7:0}] [L48] EXPR string_B[nc_B] VAL [found=0, i=5, nc_A=0, nc_B=0, string_A={6:0}, string_B={7:0}, string_B[nc_B]=0] [L48] COND FALSE !(string_B[nc_B]!='\0') [L51] COND FALSE !(!(nc_B >= nc_A)) [L54] EXPR j=0 [L54] i=j=0 VAL [found=0, i=0, j=0, nc_A=0, nc_B=0, string_A={6:0}, string_B={7:0}] [L55] COND FALSE !((inc_B-1)< main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ 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 -> fd601fa28543c13c2fbec075867019b65bb9d0c4bbf720a0162dbf887aa47892 [2022-10-17 10:52:25,649 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:52:25,671 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:52:25,674 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:52:25,675 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:52:25,676 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:52:25,677 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/loops/string-2.i [2022-10-17 10:52:25,745 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/data/6546990a7/525bd0c2592c492d994d1897d8a8212a/FLAG1adc130b1 [2022-10-17 10:52:26,396 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:52:26,398 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/sv-benchmarks/c/loops/string-2.i [2022-10-17 10:52:26,406 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/data/6546990a7/525bd0c2592c492d994d1897d8a8212a/FLAG1adc130b1 [2022-10-17 10:52:26,736 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/data/6546990a7/525bd0c2592c492d994d1897d8a8212a [2022-10-17 10:52:26,738 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:52:26,739 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:52:26,757 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:52:26,757 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:52:26,761 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:52:26,761 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:52:26" (1/1) ... [2022-10-17 10:52:26,762 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50565c23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:52:26, skipping insertion in model container [2022-10-17 10:52:26,763 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:52:26" (1/1) ... [2022-10-17 10:52:26,770 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:52:26,786 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:52:26,929 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_71e73120-24d6-4f9f-9b83-58bccdcf790f/sv-benchmarks/c/loops/string-2.i[896,909] [2022-10-17 10:52:26,967 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:52:26,978 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:52:26,992 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_71e73120-24d6-4f9f-9b83-58bccdcf790f/sv-benchmarks/c/loops/string-2.i[896,909] [2022-10-17 10:52:27,003 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:52:27,018 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:52:27,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:52:27 WrapperNode [2022-10-17 10:52:27,018 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:52:27,020 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:52:27,020 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:52:27,020 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:52:27,028 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:52:27" (1/1) ... [2022-10-17 10:52:27,041 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:52:27" (1/1) ... [2022-10-17 10:52:27,079 INFO L138 Inliner]: procedures = 17, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 124 [2022-10-17 10:52:27,079 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:52:27,081 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:52:27,081 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:52:27,081 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:52:27,090 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:52:27" (1/1) ... [2022-10-17 10:52:27,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:52:27" (1/1) ... [2022-10-17 10:52:27,094 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:52:27" (1/1) ... [2022-10-17 10:52:27,094 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:52:27" (1/1) ... [2022-10-17 10:52:27,102 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:52:27" (1/1) ... [2022-10-17 10:52:27,108 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:52:27" (1/1) ... [2022-10-17 10:52:27,109 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:52:27" (1/1) ... [2022-10-17 10:52:27,111 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:52:27" (1/1) ... [2022-10-17 10:52:27,114 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:52:27,115 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:52:27,115 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:52:27,115 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:52:27,116 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:52:27" (1/1) ... [2022-10-17 10:52:27,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:52:27,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:52:27,150 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:52:27,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:52:27,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:52:27,189 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-10-17 10:52:27,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-10-17 10:52:27,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 10:52:27,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:52:27,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:52:27,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-10-17 10:52:27,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 10:52:27,264 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:52:27,266 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:52:27,565 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:52:27,572 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:52:27,572 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-10-17 10:52:27,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:52:27 BoogieIcfgContainer [2022-10-17 10:52:27,574 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:52:27,585 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:52:27,585 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:52:27,588 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:52:27,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:52:26" (1/3) ... [2022-10-17 10:52:27,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79884a9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:52:27, skipping insertion in model container [2022-10-17 10:52:27,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:52:27" (2/3) ... [2022-10-17 10:52:27,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79884a9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:52:27, skipping insertion in model container [2022-10-17 10:52:27,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:52:27" (3/3) ... [2022-10-17 10:52:27,591 INFO L112 eAbstractionObserver]: Analyzing ICFG string-2.i [2022-10-17 10:52:27,611 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:52:27,611 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:52:27,676 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:52:27,693 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3af8cfcd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:52:27,693 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 10:52:27,698 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 25 states have internal predecessors, (40), 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) [2022-10-17 10:52:27,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-10-17 10:52:27,705 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:52:27,706 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:52:27,707 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:52:27,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:52:27,716 INFO L85 PathProgramCache]: Analyzing trace with hash 374782792, now seen corresponding path program 1 times [2022-10-17 10:52:27,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-10-17 10:52:27,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1489916742] [2022-10-17 10:52:27,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:52:27,731 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 10:52:27,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/mathsat [2022-10-17 10:52:27,735 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 10:52:27,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-10-17 10:52:27,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:52:27,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 1 conjunts are in the unsatisfiable core [2022-10-17 10:52:27,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:52:27,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:52:27,924 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:52:27,925 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-10-17 10:52:27,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1489916742] [2022-10-17 10:52:27,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1489916742] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:52:27,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:52:27,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:52:27,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910928942] [2022-10-17 10:52:27,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:52:27,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 10:52:27,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-10-17 10:52:27,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 10:52:27,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 10:52:27,978 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 25 states have internal predecessors, (40), 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 2 states, 2 states have (on average 8.0) internal successors, (16), 2 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) [2022-10-17 10:52:28,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:52:28,005 INFO L93 Difference]: Finished difference Result 48 states and 74 transitions. [2022-10-17 10:52:28,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 10:52:28,008 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 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 16 [2022-10-17 10:52:28,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:52:28,017 INFO L225 Difference]: With dead ends: 48 [2022-10-17 10:52:28,018 INFO L226 Difference]: Without dead ends: 22 [2022-10-17 10:52:28,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 10:52:28,029 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:52:28,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:52:28,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-10-17 10:52:28,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-10-17 10:52:28,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 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) [2022-10-17 10:52:28,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-10-17 10:52:28,084 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 16 [2022-10-17 10:52:28,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:52:28,084 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-10-17 10:52:28,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 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) [2022-10-17 10:52:28,086 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-10-17 10:52:28,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-10-17 10:52:28,088 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:52:28,088 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:52:28,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:52:28,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 [2022-10-17 10:52:28,301 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:52:28,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:52:28,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1602331574, now seen corresponding path program 1 times [2022-10-17 10:52:28,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-10-17 10:52:28,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [475456255] [2022-10-17 10:52:28,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:52:28,311 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 10:52:28,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/mathsat [2022-10-17 10:52:28,313 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 10:52:28,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-10-17 10:52:28,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:52:28,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 10:52:28,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:52:28,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:52:28,442 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:52:28,443 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-10-17 10:52:28,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [475456255] [2022-10-17 10:52:28,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [475456255] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:52:28,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:52:28,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:52:28,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611107913] [2022-10-17 10:52:28,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:52:28,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:52:28,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-10-17 10:52:28,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:52:28,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:52:28,453 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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) [2022-10-17 10:52:28,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:52:28,552 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2022-10-17 10:52:28,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:52:28,553 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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 18 [2022-10-17 10:52:28,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:52:28,554 INFO L225 Difference]: With dead ends: 50 [2022-10-17 10:52:28,554 INFO L226 Difference]: Without dead ends: 32 [2022-10-17 10:52:28,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:52:28,556 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 7 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:52:28,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 31 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:52:28,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-10-17 10:52:28,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2022-10-17 10:52:28,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 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) [2022-10-17 10:52:28,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2022-10-17 10:52:28,570 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 18 [2022-10-17 10:52:28,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:52:28,570 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2022-10-17 10:52:28,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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) [2022-10-17 10:52:28,571 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2022-10-17 10:52:28,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-10-17 10:52:28,572 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:52:28,572 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:52:28,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:52:28,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 [2022-10-17 10:52:28,773 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:52:28,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:52:28,774 INFO L85 PathProgramCache]: Analyzing trace with hash 177830358, now seen corresponding path program 1 times [2022-10-17 10:52:28,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-10-17 10:52:28,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [972867257] [2022-10-17 10:52:28,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:52:28,775 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 10:52:28,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/mathsat [2022-10-17 10:52:28,783 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 10:52:28,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-10-17 10:52:28,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:52:28,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 10:52:28,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:52:28,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:52:28,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:52:28,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:52:28,969 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-10-17 10:52:28,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [972867257] [2022-10-17 10:52:28,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [972867257] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:52:28,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:52:28,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-10-17 10:52:28,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743741035] [2022-10-17 10:52:28,971 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 10:52:28,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:52:28,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-10-17 10:52:28,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:52:28,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:52:28,973 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 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) [2022-10-17 10:52:29,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:52:29,235 INFO L93 Difference]: Finished difference Result 79 states and 98 transitions. [2022-10-17 10:52:29,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:52:29,237 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 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 22 [2022-10-17 10:52:29,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:52:29,238 INFO L225 Difference]: With dead ends: 79 [2022-10-17 10:52:29,238 INFO L226 Difference]: Without dead ends: 60 [2022-10-17 10:52:29,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:52:29,240 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:52:29,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 63 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:52:29,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-10-17 10:52:29,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 36. [2022-10-17 10:52:29,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 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) [2022-10-17 10:52:29,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-10-17 10:52:29,259 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 22 [2022-10-17 10:52:29,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:52:29,260 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-10-17 10:52:29,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 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) [2022-10-17 10:52:29,261 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-10-17 10:52:29,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-10-17 10:52:29,264 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:52:29,264 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:52:29,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-10-17 10:52:29,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 [2022-10-17 10:52:29,476 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:52:29,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:52:29,477 INFO L85 PathProgramCache]: Analyzing trace with hash -583604682, now seen corresponding path program 2 times [2022-10-17 10:52:29,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-10-17 10:52:29,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2127612712] [2022-10-17 10:52:29,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:52:29,478 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 10:52:29,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/mathsat [2022-10-17 10:52:29,489 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 10:52:29,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-10-17 10:52:29,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-17 10:52:29,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:52:29,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-17 10:52:29,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:52:29,672 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-10-17 10:52:29,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:52:29,672 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-10-17 10:52:29,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2127612712] [2022-10-17 10:52:29,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2127612712] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:52:29,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:52:29,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:52:29,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312448448] [2022-10-17 10:52:29,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:52:29,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:52:29,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-10-17 10:52:29,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:52:29,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:52:29,675 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 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) [2022-10-17 10:52:29,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:52:29,750 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2022-10-17 10:52:29,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:52:29,750 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 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 34 [2022-10-17 10:52:29,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:52:29,752 INFO L225 Difference]: With dead ends: 48 [2022-10-17 10:52:29,752 INFO L226 Difference]: Without dead ends: 38 [2022-10-17 10:52:29,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:52:29,754 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 4 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:52:29,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 63 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:52:29,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-10-17 10:52:29,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-10-17 10:52:29,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.162162162162162) internal successors, (43), 37 states have internal predecessors, (43), 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) [2022-10-17 10:52:29,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2022-10-17 10:52:29,762 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 34 [2022-10-17 10:52:29,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:52:29,763 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2022-10-17 10:52:29,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 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) [2022-10-17 10:52:29,763 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2022-10-17 10:52:29,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-10-17 10:52:29,765 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:52:29,765 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:52:29,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-10-17 10:52:29,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 [2022-10-17 10:52:29,976 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:52:29,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:52:29,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1829932657, now seen corresponding path program 1 times [2022-10-17 10:52:29,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-10-17 10:52:29,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1001359085] [2022-10-17 10:52:29,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:52:29,978 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 10:52:29,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/mathsat [2022-10-17 10:52:29,979 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 10:52:29,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-10-17 10:52:30,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:52:30,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 10:52:30,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:52:30,153 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-10-17 10:52:30,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:52:30,319 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-10-17 10:52:30,319 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-10-17 10:52:30,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1001359085] [2022-10-17 10:52:30,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1001359085] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:52:30,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:52:30,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-10-17 10:52:30,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277397153] [2022-10-17 10:52:30,320 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 10:52:30,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-17 10:52:30,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-10-17 10:52:30,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-17 10:52:30,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:52:30,322 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:52:30,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:52:30,828 INFO L93 Difference]: Finished difference Result 101 states and 117 transitions. [2022-10-17 10:52:30,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:52:30,831 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-10-17 10:52:30,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:52:30,832 INFO L225 Difference]: With dead ends: 101 [2022-10-17 10:52:30,832 INFO L226 Difference]: Without dead ends: 74 [2022-10-17 10:52:30,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:52:30,834 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 102 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 10:52:30,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 133 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-17 10:52:30,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-10-17 10:52:30,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 42. [2022-10-17 10:52:30,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 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) [2022-10-17 10:52:30,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-10-17 10:52:30,844 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 36 [2022-10-17 10:52:30,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:52:30,844 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-10-17 10:52:30,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:52:30,845 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-10-17 10:52:30,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-10-17 10:52:30,846 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:52:30,847 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:52:30,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-10-17 10:52:31,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 [2022-10-17 10:52:31,059 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:52:31,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:52:31,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1782806673, now seen corresponding path program 2 times [2022-10-17 10:52:31,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-10-17 10:52:31,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1750383591] [2022-10-17 10:52:31,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:52:31,063 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 10:52:31,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/mathsat [2022-10-17 10:52:31,064 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 10:52:31,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-10-17 10:52:31,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-17 10:52:31,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:52:31,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 10:52:31,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:52:31,337 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-10-17 10:52:31,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:52:31,338 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-10-17 10:52:31,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1750383591] [2022-10-17 10:52:31,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1750383591] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:52:31,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:52:31,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:52:31,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506404270] [2022-10-17 10:52:31,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:52:31,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:52:31,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-10-17 10:52:31,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:52:31,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:52:31,344 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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) [2022-10-17 10:52:31,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:52:31,431 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2022-10-17 10:52:31,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:52:31,432 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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 40 [2022-10-17 10:52:31,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:52:31,433 INFO L225 Difference]: With dead ends: 48 [2022-10-17 10:52:31,433 INFO L226 Difference]: Without dead ends: 44 [2022-10-17 10:52:31,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:52:31,434 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:52:31,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 56 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:52:31,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-10-17 10:52:31,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-10-17 10:52:31,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 42 states have internal predecessors, (48), 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) [2022-10-17 10:52:31,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2022-10-17 10:52:31,452 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 40 [2022-10-17 10:52:31,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:52:31,454 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2022-10-17 10:52:31,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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) [2022-10-17 10:52:31,456 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2022-10-17 10:52:31,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-10-17 10:52:31,457 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:52:31,459 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:52:31,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-10-17 10:52:31,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 [2022-10-17 10:52:31,660 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:52:31,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:52:31,660 INFO L85 PathProgramCache]: Analyzing trace with hash -364393356, now seen corresponding path program 1 times [2022-10-17 10:52:31,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-10-17 10:52:31,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1271304730] [2022-10-17 10:52:31,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:52:31,661 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 10:52:31,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/mathsat [2022-10-17 10:52:31,663 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 10:52:31,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-10-17 10:52:31,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:52:31,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 10:52:31,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:52:31,838 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-10-17 10:52:31,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:52:31,838 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-10-17 10:52:31,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1271304730] [2022-10-17 10:52:31,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1271304730] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:52:31,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:52:31,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:52:31,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354524206] [2022-10-17 10:52:31,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:52:31,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:52:31,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-10-17 10:52:31,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:52:31,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:52:31,840 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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) [2022-10-17 10:52:31,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:52:31,882 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2022-10-17 10:52:31,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:52:31,883 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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 42 [2022-10-17 10:52:31,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:52:31,884 INFO L225 Difference]: With dead ends: 58 [2022-10-17 10:52:31,884 INFO L226 Difference]: Without dead ends: 45 [2022-10-17 10:52:31,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:52:31,885 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:52:31,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 49 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:52:31,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-10-17 10:52:31,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-10-17 10:52:31,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 44 states have internal predecessors, (50), 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) [2022-10-17 10:52:31,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2022-10-17 10:52:31,893 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 42 [2022-10-17 10:52:31,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:52:31,893 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2022-10-17 10:52:31,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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) [2022-10-17 10:52:31,894 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2022-10-17 10:52:31,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-10-17 10:52:31,895 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:52:31,895 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:52:31,917 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-10-17 10:52:32,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 [2022-10-17 10:52:32,096 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:52:32,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:52:32,097 INFO L85 PathProgramCache]: Analyzing trace with hash -512239655, now seen corresponding path program 1 times [2022-10-17 10:52:32,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-10-17 10:52:32,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1190650532] [2022-10-17 10:52:32,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:52:32,097 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 10:52:32,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/mathsat [2022-10-17 10:52:32,098 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 10:52:32,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-10-17 10:52:32,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:52:32,312 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 10:52:32,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:52:32,460 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2022-10-17 10:52:32,461 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 10:52:32,462 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-10-17 10:52:32,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-10-17 10:52:32,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 [2022-10-17 10:52:32,668 INFO L444 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2022-10-17 10:52:32,672 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-10-17 10:52:32,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.10 10:52:32 BoogieIcfgContainer [2022-10-17 10:52:32,779 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-10-17 10:52:32,779 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-10-17 10:52:32,779 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-10-17 10:52:32,780 INFO L275 PluginConnector]: Witness Printer initialized [2022-10-17 10:52:32,780 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:52:27" (3/4) ... [2022-10-17 10:52:32,782 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-10-17 10:52:32,858 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e73120-24d6-4f9f-9b83-58bccdcf790f/bin/uautomizer-J5u9QxTXDZ/witness.graphml [2022-10-17 10:52:32,858 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-10-17 10:52:32,859 INFO L158 Benchmark]: Toolchain (without parser) took 6120.05ms. Allocated memory was 54.5MB in the beginning and 96.5MB in the end (delta: 41.9MB). Free memory was 29.8MB in the beginning and 74.3MB in the end (delta: -44.5MB). Peak memory consumption was 36.5MB. Max. memory is 16.1GB. [2022-10-17 10:52:32,860 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 54.5MB. Free memory was 34.7MB in the beginning and 34.6MB in the end (delta: 50.1kB). There was no memory consumed. Max. memory is 16.1GB. [2022-10-17 10:52:32,860 INFO L158 Benchmark]: CACSL2BoogieTranslator took 261.94ms. Allocated memory is still 54.5MB. Free memory was 29.5MB in the beginning and 35.7MB in the end (delta: -6.2MB). Peak memory consumption was 12.1MB. Max. memory is 16.1GB. [2022-10-17 10:52:32,860 INFO L158 Benchmark]: Boogie Procedure Inliner took 59.83ms. Allocated memory is still 54.5MB. Free memory was 35.7MB in the beginning and 34.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-10-17 10:52:32,861 INFO L158 Benchmark]: Boogie Preprocessor took 33.43ms. Allocated memory is still 54.5MB. Free memory was 34.1MB in the beginning and 32.4MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2022-10-17 10:52:32,861 INFO L158 Benchmark]: RCFGBuilder took 459.56ms. Allocated memory was 54.5MB in the beginning and 79.7MB in the end (delta: 25.2MB). Free memory was 32.4MB in the beginning and 58.9MB in the end (delta: -26.5MB). Peak memory consumption was 14.4MB. Max. memory is 16.1GB. [2022-10-17 10:52:32,862 INFO L158 Benchmark]: TraceAbstraction took 5194.11ms. Allocated memory was 79.7MB in the beginning and 96.5MB in the end (delta: 16.8MB). Free memory was 58.2MB in the beginning and 40.9MB in the end (delta: 17.3MB). Peak memory consumption was 35.0MB. Max. memory is 16.1GB. [2022-10-17 10:52:32,862 INFO L158 Benchmark]: Witness Printer took 79.29ms. Allocated memory is still 96.5MB. Free memory was 40.9MB in the beginning and 74.3MB in the end (delta: -33.3MB). Peak memory consumption was 2.2MB. Max. memory is 16.1GB. [2022-10-17 10:52:32,865 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 54.5MB. Free memory was 34.7MB in the beginning and 34.6MB in the end (delta: 50.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 261.94ms. Allocated memory is still 54.5MB. Free memory was 29.5MB in the beginning and 35.7MB in the end (delta: -6.2MB). Peak memory consumption was 12.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 59.83ms. Allocated memory is still 54.5MB. Free memory was 35.7MB in the beginning and 34.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 33.43ms. Allocated memory is still 54.5MB. Free memory was 34.1MB in the beginning and 32.4MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 459.56ms. Allocated memory was 54.5MB in the beginning and 79.7MB in the end (delta: 25.2MB). Free memory was 32.4MB in the beginning and 58.9MB in the end (delta: -26.5MB). Peak memory consumption was 14.4MB. Max. memory is 16.1GB. * TraceAbstraction took 5194.11ms. Allocated memory was 79.7MB in the beginning and 96.5MB in the end (delta: 16.8MB). Free memory was 58.2MB in the beginning and 40.9MB in the end (delta: 17.3MB). Peak memory consumption was 35.0MB. Max. memory is 16.1GB. * Witness Printer took 79.29ms. Allocated memory is still 96.5MB. Free memory was 40.9MB in the beginning and 74.3MB in the end (delta: -33.3MB). Peak memory consumption was 2.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 20]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L31] char string_A[5], string_B[5]; [L32] int i, j, nc_A, nc_B, found=0; [L35] i=0 VAL [found=0, i=0, string_A={3:0}, string_B={7:0}] [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ VAL [found=0, i=1, string_A={3:0}, string_B={7:0}] [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ VAL [found=0, i=2, string_A={3:0}, string_B={7:0}] [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ VAL [found=0, i=3, string_A={3:0}, string_B={7:0}] [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ VAL [found=0, i=4, string_A={3:0}, string_B={7:0}] [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ VAL [found=0, i=5, string_A={3:0}, string_B={7:0}] [L35] COND FALSE !(i<5) VAL [found=0, i=5, string_A={3:0}, string_B={7:0}] [L37] EXPR string_A[5 -1] VAL [found=0, i=5, string_A={3:0}, string_A[5 -1]=0, string_B={7:0}] [L37] COND FALSE !(!(string_A[5 -1]=='\0')) [L39] i=0 VAL [found=0, i=0, string_A={3:0}, string_B={7:0}] [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ VAL [found=0, i=1, string_A={3:0}, string_B={7:0}] [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ VAL [found=0, i=2, string_A={3:0}, string_B={7:0}] [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ VAL [found=0, i=3, string_A={3:0}, string_B={7:0}] [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ VAL [found=0, i=4, string_A={3:0}, string_B={7:0}] [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ VAL [found=0, i=5, string_A={3:0}, string_B={7:0}] [L39] COND FALSE !(i<5) VAL [found=0, i=5, string_A={3:0}, string_B={7:0}] [L41] EXPR string_B[5 -1] VAL [found=0, i=5, string_A={3:0}, string_B={7:0}, string_B[5 -1]=0] [L41] COND FALSE !(!(string_B[5 -1]=='\0')) [L43] nc_A = 0 VAL [found=0, i=5, nc_A=0, string_A={3:0}, string_B={7:0}] [L44] EXPR string_A[nc_A] VAL [found=0, i=5, nc_A=0, string_A={3:0}, string_A[nc_A]=-128, string_B={7:0}] [L44] COND TRUE string_A[nc_A]!='\0' [L45] nc_A++ VAL [found=0, i=5, nc_A=1, string_A={3:0}, string_B={7:0}] [L44] EXPR string_A[nc_A] VAL [found=0, i=5, nc_A=1, string_A={3:0}, string_A[nc_A]=0, string_B={7:0}] [L44] COND FALSE !(string_A[nc_A]!='\0') [L47] nc_B = 0 VAL [found=0, i=5, nc_A=1, nc_B=0, string_A={3:0}, string_B={7:0}] [L48] EXPR string_B[nc_B] VAL [found=0, i=5, nc_A=1, nc_B=0, string_A={3:0}, string_B={7:0}, string_B[nc_B]=-128] [L48] COND TRUE string_B[nc_B]!='\0' [L49] nc_B++ VAL [found=0, i=5, nc_A=1, nc_B=1, string_A={3:0}, string_B={7:0}] [L48] EXPR string_B[nc_B] VAL [found=0, i=5, nc_A=1, nc_B=1, string_A={3:0}, string_B={7:0}, string_B[nc_B]=0] [L48] COND FALSE !(string_B[nc_B]!='\0') [L51] COND FALSE !(!(nc_B >= nc_A)) [L54] EXPR j=0 [L54] i=j=0 VAL [found=0, i=0, j=0, nc_A=1, nc_B=1, string_A={3:0}, string_B={7:0}] [L55] COND TRUE (inc_B-1)<