./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem12_label08.c --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_8578f5d7-ab1e-4e9b-af84-9e8d6aef24e8/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8578f5d7-ab1e-4e9b-af84-9e8d6aef24e8/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_8578f5d7-ab1e-4e9b-af84-9e8d6aef24e8/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8578f5d7-ab1e-4e9b-af84-9e8d6aef24e8/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem12_label08.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8578f5d7-ab1e-4e9b-af84-9e8d6aef24e8/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_8578f5d7-ab1e-4e9b-af84-9e8d6aef24e8/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 6974994fa41c2218950105a3f2a905efa9ed2213c945e8187ea9622e98b47d24 --- 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 10:59:04,280 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:59:04,282 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:59:04,313 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:59:04,314 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:59:04,315 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:59:04,317 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:59:04,319 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:59:04,325 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:59:04,327 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:59:04,328 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:59:04,332 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:59:04,332 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:59:04,338 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:59:04,339 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:59:04,341 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:59:04,343 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:59:04,345 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:59:04,350 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:59:04,354 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:59:04,358 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:59:04,359 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:59:04,363 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:59:04,364 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:59:04,370 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:59:04,371 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:59:04,371 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:59:04,373 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:59:04,374 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:59:04,375 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:59:04,376 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:59:04,377 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:59:04,378 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:59:04,380 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:59:04,381 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:59:04,381 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:59:04,381 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:59:04,382 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:59:04,382 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:59:04,383 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:59:04,383 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:59:04,384 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8578f5d7-ab1e-4e9b-af84-9e8d6aef24e8/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:59:04,424 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:59:04,424 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:59:04,425 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:59:04,425 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:59:04,425 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:59:04,430 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:59:04,431 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:59:04,431 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:59:04,431 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:59:04,431 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:59:04,432 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:59:04,432 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:59:04,432 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:59:04,433 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:59:04,433 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:59:04,433 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:59:04,433 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:59:04,433 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:59:04,434 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:59:04,434 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:59:04,434 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:59:04,434 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:59:04,434 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:59:04,435 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:59:04,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:59:04,435 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:59:04,437 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:59:04,437 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:59:04,437 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:59:04,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:59:04,437 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:59:04,438 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:59:04,438 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:59:04,438 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_8578f5d7-ab1e-4e9b-af84-9e8d6aef24e8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8578f5d7-ab1e-4e9b-af84-9e8d6aef24e8/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6974994fa41c2218950105a3f2a905efa9ed2213c945e8187ea9622e98b47d24 [2022-10-17 10:59:04,734 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:59:04,760 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:59:04,763 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:59:04,764 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:59:04,765 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:59:04,766 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8578f5d7-ab1e-4e9b-af84-9e8d6aef24e8/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/eca-rers2012/Problem12_label08.c [2022-10-17 10:59:04,844 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8578f5d7-ab1e-4e9b-af84-9e8d6aef24e8/bin/uautomizer-J5u9QxTXDZ/data/565c8cfc2/451ca3179cc547f4b682aec2f8869562/FLAGa547335d6 [2022-10-17 10:59:05,682 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:59:05,682 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8578f5d7-ab1e-4e9b-af84-9e8d6aef24e8/sv-benchmarks/c/eca-rers2012/Problem12_label08.c [2022-10-17 10:59:05,712 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8578f5d7-ab1e-4e9b-af84-9e8d6aef24e8/bin/uautomizer-J5u9QxTXDZ/data/565c8cfc2/451ca3179cc547f4b682aec2f8869562/FLAGa547335d6 [2022-10-17 10:59:06,225 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8578f5d7-ab1e-4e9b-af84-9e8d6aef24e8/bin/uautomizer-J5u9QxTXDZ/data/565c8cfc2/451ca3179cc547f4b682aec2f8869562 [2022-10-17 10:59:06,231 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:59:06,233 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:59:06,234 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:59:06,235 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:59:06,238 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:59:06,239 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:59:06" (1/1) ... [2022-10-17 10:59:06,240 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56ea65ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:59:06, skipping insertion in model container [2022-10-17 10:59:06,240 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:59:06" (1/1) ... [2022-10-17 10:59:06,247 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:59:06,376 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:59:06,661 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_8578f5d7-ab1e-4e9b-af84-9e8d6aef24e8/sv-benchmarks/c/eca-rers2012/Problem12_label08.c[3868,3881] [2022-10-17 10:59:07,759 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:59:07,768 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:59:07,802 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_8578f5d7-ab1e-4e9b-af84-9e8d6aef24e8/sv-benchmarks/c/eca-rers2012/Problem12_label08.c[3868,3881] [2022-10-17 10:59:08,375 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:59:08,400 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:59:08,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:59:08 WrapperNode [2022-10-17 10:59:08,401 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:59:08,402 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:59:08,402 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:59:08,402 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:59:08,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:59:08" (1/1) ... [2022-10-17 10:59:08,470 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:59:08" (1/1) ... [2022-10-17 10:59:08,761 INFO L138 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2022-10-17 10:59:08,762 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:59:08,763 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:59:08,763 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:59:08,763 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:59:08,774 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:59:08" (1/1) ... [2022-10-17 10:59:08,774 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:59:08" (1/1) ... [2022-10-17 10:59:08,893 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:59:08" (1/1) ... [2022-10-17 10:59:08,893 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:59:08" (1/1) ... [2022-10-17 10:59:09,125 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:59:08" (1/1) ... [2022-10-17 10:59:09,158 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:59:08" (1/1) ... [2022-10-17 10:59:09,215 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:59:08" (1/1) ... [2022-10-17 10:59:09,318 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:59:08" (1/1) ... [2022-10-17 10:59:09,408 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:59:09,410 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:59:09,411 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:59:09,411 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:59:09,412 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:59:08" (1/1) ... [2022-10-17 10:59:09,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:59:09,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8578f5d7-ab1e-4e9b-af84-9e8d6aef24e8/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:59:09,447 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8578f5d7-ab1e-4e9b-af84-9e8d6aef24e8/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:59:09,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8578f5d7-ab1e-4e9b-af84-9e8d6aef24e8/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:59:09,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:59:09,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:59:09,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:59:09,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:59:09,592 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:59:09,593 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:59:14,652 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:59:14,676 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:59:14,677 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-17 10:59:14,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:59:14 BoogieIcfgContainer [2022-10-17 10:59:14,681 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:59:14,685 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:59:14,685 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:59:14,688 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:59:14,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:59:06" (1/3) ... [2022-10-17 10:59:14,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a5ebd2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:59:14, skipping insertion in model container [2022-10-17 10:59:14,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:59:08" (2/3) ... [2022-10-17 10:59:14,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a5ebd2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:59:14, skipping insertion in model container [2022-10-17 10:59:14,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:59:14" (3/3) ... [2022-10-17 10:59:14,692 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label08.c [2022-10-17 10:59:14,710 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:59:14,710 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:59:14,805 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:59:14,820 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;@45daa7b1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:59:14,820 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 10:59:14,838 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 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 10:59:14,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-10-17 10:59:14,846 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:59:14,847 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, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:59:14,847 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:59:14,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:59:14,854 INFO L85 PathProgramCache]: Analyzing trace with hash -748286455, now seen corresponding path program 1 times [2022-10-17 10:59:14,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:59:14,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016096783] [2022-10-17 10:59:14,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:59:14,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:59:15,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:59:15,265 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 10:59:15,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:59:15,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016096783] [2022-10-17 10:59:15,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016096783] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:59:15,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:59:15,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:59:15,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104030702] [2022-10-17 10:59:15,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:59:15,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:59:15,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:59:15,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:59:15,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:59:15,319 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 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 9.666666666666666) internal successors, (29), 2 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 10:59:19,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:59:19,785 INFO L93 Difference]: Finished difference Result 2404 states and 4645 transitions. [2022-10-17 10:59:19,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:59:19,792 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 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 29 [2022-10-17 10:59:19,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:59:19,816 INFO L225 Difference]: With dead ends: 2404 [2022-10-17 10:59:19,816 INFO L226 Difference]: Without dead ends: 1506 [2022-10-17 10:59:19,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 10:59:19,827 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 791 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2337 mSolverCounterSat, 696 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 3033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 696 IncrementalHoareTripleChecker+Valid, 2337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-10-17 10:59:19,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [791 Valid, 525 Invalid, 3033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [696 Valid, 2337 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-10-17 10:59:19,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2022-10-17 10:59:19,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2022-10-17 10:59:19,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.6066445182724252) internal successors, (2418), 1505 states have internal predecessors, (2418), 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 10:59:19,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2418 transitions. [2022-10-17 10:59:19,946 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2418 transitions. Word has length 29 [2022-10-17 10:59:19,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:59:19,947 INFO L495 AbstractCegarLoop]: Abstraction has 1506 states and 2418 transitions. [2022-10-17 10:59:19,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 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 10:59:19,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2418 transitions. [2022-10-17 10:59:19,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-10-17 10:59:19,951 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:59:19,952 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:59:19,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:59:19,952 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:59:19,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:59:19,953 INFO L85 PathProgramCache]: Analyzing trace with hash 656790149, now seen corresponding path program 1 times [2022-10-17 10:59:19,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:59:19,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055651499] [2022-10-17 10:59:19,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:59:19,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:59:20,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:59:20,250 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:59:20,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:59:20,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055651499] [2022-10-17 10:59:20,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055651499] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:59:20,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:59:20,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:59:20,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485905262] [2022-10-17 10:59:20,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:59:20,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:59:20,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:59:20,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:59:20,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:59:20,256 INFO L87 Difference]: Start difference. First operand 1506 states and 2418 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 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 10:59:23,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:59:23,867 INFO L93 Difference]: Finished difference Result 4512 states and 7249 transitions. [2022-10-17 10:59:23,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:59:23,867 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 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 104 [2022-10-17 10:59:23,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:59:23,885 INFO L225 Difference]: With dead ends: 4512 [2022-10-17 10:59:23,885 INFO L226 Difference]: Without dead ends: 3008 [2022-10-17 10:59:23,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 10:59:23,895 INFO L413 NwaCegarLoop]: 443 mSDtfsCounter, 774 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1995 mSolverCounterSat, 935 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 2930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 935 IncrementalHoareTripleChecker+Valid, 1995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-10-17 10:59:23,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [774 Valid, 449 Invalid, 2930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [935 Valid, 1995 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-10-17 10:59:23,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2022-10-17 10:59:23,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 3008. [2022-10-17 10:59:23,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 1.4156967076820752) internal successors, (4257), 3007 states have internal predecessors, (4257), 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 10:59:23,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 4257 transitions. [2022-10-17 10:59:23,986 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 4257 transitions. Word has length 104 [2022-10-17 10:59:23,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:59:23,988 INFO L495 AbstractCegarLoop]: Abstraction has 3008 states and 4257 transitions. [2022-10-17 10:59:23,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 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 10:59:23,989 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 4257 transitions. [2022-10-17 10:59:23,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-10-17 10:59:23,999 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:59:24,000 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:59:24,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:59:24,004 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:59:24,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:59:24,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1941804630, now seen corresponding path program 1 times [2022-10-17 10:59:24,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:59:24,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756286337] [2022-10-17 10:59:24,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:59:24,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:59:24,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:59:24,481 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:59:24,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:59:24,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756286337] [2022-10-17 10:59:24,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756286337] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:59:24,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:59:24,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:59:24,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583942433] [2022-10-17 10:59:24,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:59:24,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:59:24,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:59:24,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:59:24,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:59:24,484 INFO L87 Difference]: Start difference. First operand 3008 states and 4257 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:59:30,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:59:30,108 INFO L93 Difference]: Finished difference Result 9769 states and 13601 transitions. [2022-10-17 10:59:30,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:59:30,109 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2022-10-17 10:59:30,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:59:30,146 INFO L225 Difference]: With dead ends: 9769 [2022-10-17 10:59:30,146 INFO L226 Difference]: Without dead ends: 6763 [2022-10-17 10:59:30,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:59:30,152 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 2180 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 4712 mSolverCounterSat, 747 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2180 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 5459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 747 IncrementalHoareTripleChecker+Valid, 4712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-10-17 10:59:30,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2180 Valid, 166 Invalid, 5459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [747 Valid, 4712 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-10-17 10:59:30,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6763 states. [2022-10-17 10:59:30,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6763 to 6763. [2022-10-17 10:59:30,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6763 states, 6762 states have (on average 1.3507837917775807) internal successors, (9134), 6762 states have internal predecessors, (9134), 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 10:59:30,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 9134 transitions. [2022-10-17 10:59:30,320 INFO L78 Accepts]: Start accepts. Automaton has 6763 states and 9134 transitions. Word has length 106 [2022-10-17 10:59:30,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:59:30,321 INFO L495 AbstractCegarLoop]: Abstraction has 6763 states and 9134 transitions. [2022-10-17 10:59:30,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:59:30,322 INFO L276 IsEmpty]: Start isEmpty. Operand 6763 states and 9134 transitions. [2022-10-17 10:59:30,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-10-17 10:59:30,324 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:59:30,324 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:59:30,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 10:59:30,325 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:59:30,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:59:30,325 INFO L85 PathProgramCache]: Analyzing trace with hash -907378540, now seen corresponding path program 1 times [2022-10-17 10:59:30,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:59:30,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809105950] [2022-10-17 10:59:30,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:59:30,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:59:30,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:59:30,818 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:59:30,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:59:30,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809105950] [2022-10-17 10:59:30,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809105950] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:59:30,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885876593] [2022-10-17 10:59:30,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:59:30,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:59:30,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8578f5d7-ab1e-4e9b-af84-9e8d6aef24e8/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:59:30,827 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8578f5d7-ab1e-4e9b-af84-9e8d6aef24e8/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:59:30,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8578f5d7-ab1e-4e9b-af84-9e8d6aef24e8/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:59:30,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:59:30,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 10:59:30,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:59:31,311 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-10-17 10:59:31,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:59:31,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885876593] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:59:31,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:59:31,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-10-17 10:59:31,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844306031] [2022-10-17 10:59:31,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:59:31,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:59:31,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:59:31,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:59:31,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:59:31,316 INFO L87 Difference]: Start difference. First operand 6763 states and 9134 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 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 10:59:34,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:59:34,392 INFO L93 Difference]: Finished difference Result 15777 states and 21144 transitions. [2022-10-17 10:59:34,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:59:34,393 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 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 174 [2022-10-17 10:59:34,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:59:34,442 INFO L225 Difference]: With dead ends: 15777 [2022-10-17 10:59:34,442 INFO L226 Difference]: Without dead ends: 9767 [2022-10-17 10:59:34,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:59:34,452 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 712 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2395 mSolverCounterSat, 456 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 2851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 456 IncrementalHoareTripleChecker+Valid, 2395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:59:34,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [712 Valid, 156 Invalid, 2851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [456 Valid, 2395 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-10-17 10:59:34,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9767 states.