./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/dll2c_update_all.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_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/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_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-simple/dll2c_update_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/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_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/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 6bfeee33a1b1d098a34bec7a761d4de16bc595043f21d77f5851cba758b79f34 --- 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 10:27:40,292 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:27:40,295 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:27:40,342 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:27:40,343 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:27:40,348 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:27:40,352 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:27:40,356 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:27:40,363 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:27:40,372 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:27:40,373 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:27:40,375 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:27:40,376 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:27:40,379 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:27:40,381 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:27:40,385 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:27:40,387 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:27:40,388 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:27:40,391 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:27:40,401 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:27:40,405 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:27:40,407 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:27:40,412 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:27:40,414 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:27:40,419 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:27:40,419 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:27:40,420 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:27:40,423 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:27:40,423 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:27:40,425 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:27:40,426 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:27:40,427 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:27:40,430 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:27:40,431 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:27:40,433 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:27:40,433 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:27:40,434 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:27:40,434 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:27:40,434 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:27:40,435 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:27:40,436 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:27:40,437 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:27:40,489 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:27:40,489 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:27:40,490 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:27:40,491 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:27:40,492 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:27:40,492 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:27:40,493 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:27:40,493 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:27:40,494 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:27:40,494 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:27:40,495 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:27:40,496 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:27:40,496 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:27:40,496 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:27:40,497 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:27:40,497 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:27:40,497 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:27:40,497 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:27:40,498 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:27:40,498 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:27:40,498 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:27:40,499 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:27:40,499 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:27:40,499 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:27:40,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:27:40,500 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:27:40,500 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:27:40,500 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:27:40,501 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:27:40,501 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:27:40,501 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:27:40,501 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:27:40,502 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:27:40,502 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_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6bfeee33a1b1d098a34bec7a761d4de16bc595043f21d77f5851cba758b79f34 [2022-10-17 10:27:40,799 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:27:40,835 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:27:40,838 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:27:40,840 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:27:40,841 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:27:40,842 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/list-simple/dll2c_update_all.i [2022-10-17 10:27:40,933 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/data/d3315a7f1/3b7bf2dcf2a048e186e682b72efdd518/FLAGd50edc4ca [2022-10-17 10:27:41,674 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:27:41,675 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/sv-benchmarks/c/list-simple/dll2c_update_all.i [2022-10-17 10:27:41,690 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/data/d3315a7f1/3b7bf2dcf2a048e186e682b72efdd518/FLAGd50edc4ca [2022-10-17 10:27:41,923 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/data/d3315a7f1/3b7bf2dcf2a048e186e682b72efdd518 [2022-10-17 10:27:41,926 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:27:41,931 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:27:41,932 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:27:41,933 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:27:41,944 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:27:41,945 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:27:41" (1/1) ... [2022-10-17 10:27:41,946 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d8efbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:27:41, skipping insertion in model container [2022-10-17 10:27:41,947 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:27:41" (1/1) ... [2022-10-17 10:27:41,954 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:27:42,019 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:27:42,423 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_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/sv-benchmarks/c/list-simple/dll2c_update_all.i[24538,24551] [2022-10-17 10:27:42,431 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:27:42,444 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:27:42,527 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_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/sv-benchmarks/c/list-simple/dll2c_update_all.i[24538,24551] [2022-10-17 10:27:42,529 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:27:42,567 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:27:42,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:27:42 WrapperNode [2022-10-17 10:27:42,568 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:27:42,569 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:27:42,569 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:27:42,570 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:27:42,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:27:42" (1/1) ... [2022-10-17 10:27:42,609 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:27:42" (1/1) ... [2022-10-17 10:27:42,650 INFO L138 Inliner]: procedures = 126, calls = 29, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 131 [2022-10-17 10:27:42,650 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:27:42,651 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:27:42,652 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:27:42,652 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:27:42,663 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:27:42" (1/1) ... [2022-10-17 10:27:42,663 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:27:42" (1/1) ... [2022-10-17 10:27:42,687 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:27:42" (1/1) ... [2022-10-17 10:27:42,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:27:42" (1/1) ... [2022-10-17 10:27:42,695 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:27:42" (1/1) ... [2022-10-17 10:27:42,711 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:27:42" (1/1) ... [2022-10-17 10:27:42,713 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:27:42" (1/1) ... [2022-10-17 10:27:42,714 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:27:42" (1/1) ... [2022-10-17 10:27:42,717 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:27:42,718 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:27:42,719 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:27:42,719 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:27:42,720 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:27:42" (1/1) ... [2022-10-17 10:27:42,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:27:42,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:27:42,750 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:27:42,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:27:42,798 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 10:27:42,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 10:27:42,798 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-10-17 10:27:42,798 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-10-17 10:27:42,798 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 10:27:42,799 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:27:42,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-17 10:27:42,800 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-17 10:27:42,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 10:27:42,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:27:42,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:27:42,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:27:43,007 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:27:43,009 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:27:43,341 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:27:43,348 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:27:43,349 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-10-17 10:27:43,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:27:43 BoogieIcfgContainer [2022-10-17 10:27:43,351 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:27:43,354 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:27:43,355 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:27:43,359 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:27:43,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:27:41" (1/3) ... [2022-10-17 10:27:43,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2673a08a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:27:43, skipping insertion in model container [2022-10-17 10:27:43,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:27:42" (2/3) ... [2022-10-17 10:27:43,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2673a08a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:27:43, skipping insertion in model container [2022-10-17 10:27:43,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:27:43" (3/3) ... [2022-10-17 10:27:43,362 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2c_update_all.i [2022-10-17 10:27:43,384 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:27:43,384 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:27:43,442 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:27:43,450 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;@19d640c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:27:43,450 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 10:27:43,455 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 34 states have (on average 1.5) internal successors, (51), 35 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:27:43,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-17 10:27:43,464 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:27:43,465 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] [2022-10-17 10:27:43,466 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:27:43,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:27:43,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1387430191, now seen corresponding path program 1 times [2022-10-17 10:27:43,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:27:43,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320931593] [2022-10-17 10:27:43,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:43,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:27:43,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:43,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:27:43,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:43,739 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 10:27:43,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:27:43,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320931593] [2022-10-17 10:27:43,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320931593] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:27:43,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:27:43,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:27:43,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912547096] [2022-10-17 10:27:43,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:27:43,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:27:43,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:27:43,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:27:43,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:27:43,799 INFO L87 Difference]: Start difference. First operand has 39 states, 34 states have (on average 1.5) internal successors, (51), 35 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 10:27:43,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:27:43,887 INFO L93 Difference]: Finished difference Result 63 states and 90 transitions. [2022-10-17 10:27:43,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:27:43,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-10-17 10:27:43,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:27:43,906 INFO L225 Difference]: With dead ends: 63 [2022-10-17 10:27:43,906 INFO L226 Difference]: Without dead ends: 30 [2022-10-17 10:27:43,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:27:43,916 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:27:43,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:27:43,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-10-17 10:27:43,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-10-17 10:27:43,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:27:43,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2022-10-17 10:27:43,959 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 20 [2022-10-17 10:27:43,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:27:43,960 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2022-10-17 10:27:43,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 10:27:43,961 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2022-10-17 10:27:43,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-17 10:27:43,963 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:27:43,963 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] [2022-10-17 10:27:43,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:27:43,964 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:27:43,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:27:43,965 INFO L85 PathProgramCache]: Analyzing trace with hash 498100996, now seen corresponding path program 1 times [2022-10-17 10:27:43,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:27:43,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153131409] [2022-10-17 10:27:43,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:43,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:27:44,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:44,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:27:44,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:44,296 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 10:27:44,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:27:44,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153131409] [2022-10-17 10:27:44,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153131409] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:27:44,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:27:44,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:27:44,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266498737] [2022-10-17 10:27:44,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:27:44,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:27:44,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:27:44,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:27:44,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:27:44,300 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 10:27:44,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:27:44,360 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2022-10-17 10:27:44,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:27:44,361 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-10-17 10:27:44,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:27:44,363 INFO L225 Difference]: With dead ends: 51 [2022-10-17 10:27:44,363 INFO L226 Difference]: Without dead ends: 35 [2022-10-17 10:27:44,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:27:44,365 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:27:44,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 86 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:27:44,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-10-17 10:27:44,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2022-10-17 10:27:44,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:27:44,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-10-17 10:27:44,375 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 20 [2022-10-17 10:27:44,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:27:44,375 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-10-17 10:27:44,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 10:27:44,376 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-10-17 10:27:44,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-10-17 10:27:44,377 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:27:44,377 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-17 10:27:44,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:27:44,378 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:27:44,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:27:44,379 INFO L85 PathProgramCache]: Analyzing trace with hash 698671896, now seen corresponding path program 1 times [2022-10-17 10:27:44,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:27:44,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593988949] [2022-10-17 10:27:44,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:44,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:27:44,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:44,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:27:44,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:44,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:27:44,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:44,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 10:27:44,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:27:44,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593988949] [2022-10-17 10:27:44,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593988949] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:27:44,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:27:44,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:27:44,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054013372] [2022-10-17 10:27:44,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:27:44,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:27:44,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:27:44,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:27:44,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:27:44,673 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:27:44,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:27:44,774 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2022-10-17 10:27:44,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:27:44,775 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-10-17 10:27:44,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:27:44,778 INFO L225 Difference]: With dead ends: 53 [2022-10-17 10:27:44,779 INFO L226 Difference]: Without dead ends: 44 [2022-10-17 10:27:44,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:27:44,783 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 45 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:27:44,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 74 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:27:44,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-10-17 10:27:44,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2022-10-17 10:27:44,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:27:44,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-10-17 10:27:44,804 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 30 [2022-10-17 10:27:44,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:27:44,805 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-10-17 10:27:44,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:27:44,806 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-10-17 10:27:44,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-10-17 10:27:44,810 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:27:44,810 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-17 10:27:44,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 10:27:44,811 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:27:44,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:27:44,816 INFO L85 PathProgramCache]: Analyzing trace with hash 143562896, now seen corresponding path program 1 times [2022-10-17 10:27:44,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:27:44,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899814689] [2022-10-17 10:27:44,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:44,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:27:44,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:45,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:27:45,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:45,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:27:45,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:45,209 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 10:27:45,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:27:45,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899814689] [2022-10-17 10:27:45,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899814689] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:27:45,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77152254] [2022-10-17 10:27:45,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:45,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:27:45,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:27:45,217 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:27:45,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:27:45,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:45,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 10:27:45,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:27:45,593 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 10:27:45,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:27:45,698 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 10:27:45,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77152254] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:27:45,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:27:45,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-10-17 10:27:45,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375464391] [2022-10-17 10:27:45,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:27:45,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-17 10:27:45,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:27:45,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-17 10:27:45,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-10-17 10:27:45,711 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 10:27:45,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:27:45,827 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2022-10-17 10:27:45,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:27:45,828 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2022-10-17 10:27:45,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:27:45,832 INFO L225 Difference]: With dead ends: 55 [2022-10-17 10:27:45,833 INFO L226 Difference]: Without dead ends: 46 [2022-10-17 10:27:45,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-10-17 10:27:45,843 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 93 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:27:45,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 136 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:27:45,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-10-17 10:27:45,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2022-10-17 10:27:45,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:27:45,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2022-10-17 10:27:45,860 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 35 [2022-10-17 10:27:45,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:27:45,861 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2022-10-17 10:27:45,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 10:27:45,862 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2022-10-17 10:27:45,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-10-17 10:27:45,866 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:27:45,866 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-17 10:27:45,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:27:46,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:27:46,088 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:27:46,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:27:46,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1120694760, now seen corresponding path program 2 times [2022-10-17 10:27:46,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:27:46,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966936885] [2022-10-17 10:27:46,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:46,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:27:46,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:46,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:27:46,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:46,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:27:46,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:46,272 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 10:27:46,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:27:46,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966936885] [2022-10-17 10:27:46,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966936885] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:27:46,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26521441] [2022-10-17 10:27:46,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:27:46,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:27:46,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:27:46,285 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:27:46,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 10:27:46,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 10:27:46,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:27:46,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 5 conjunts are in the unsatisfiable core [2022-10-17 10:27:46,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:27:46,577 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 10:27:46,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:27:46,626 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 10:27:46,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26521441] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:27:46,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:27:46,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2022-10-17 10:27:46,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740729444] [2022-10-17 10:27:46,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:27:46,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:27:46,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:27:46,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:27:46,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:27:46,631 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:27:46,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:27:46,726 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2022-10-17 10:27:46,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:27:46,727 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2022-10-17 10:27:46,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:27:46,730 INFO L225 Difference]: With dead ends: 60 [2022-10-17 10:27:46,731 INFO L226 Difference]: Without dead ends: 46 [2022-10-17 10:27:46,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:27:46,732 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 32 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:27:46,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 156 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:27:46,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-10-17 10:27:46,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 38. [2022-10-17 10:27:46,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:27:46,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2022-10-17 10:27:46,752 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 40 [2022-10-17 10:27:46,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:27:46,752 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2022-10-17 10:27:46,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:27:46,753 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2022-10-17 10:27:46,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-10-17 10:27:46,754 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:27:46,755 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-17 10:27:46,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:27:46,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:27:46,982 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:27:46,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:27:46,982 INFO L85 PathProgramCache]: Analyzing trace with hash 2115896417, now seen corresponding path program 1 times [2022-10-17 10:27:46,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:27:46,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424495051] [2022-10-17 10:27:46,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:46,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:27:47,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:49,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:27:49,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:49,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:27:49,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:49,279 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:27:49,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:27:49,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424495051] [2022-10-17 10:27:49,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424495051] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:27:49,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994594473] [2022-10-17 10:27:49,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:49,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:27:49,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:27:49,282 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:27:49,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 10:27:49,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:49,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 100 conjunts are in the unsatisfiable core [2022-10-17 10:27:49,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:27:49,527 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-17 10:27:49,693 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-17 10:27:49,694 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-10-17 10:27:49,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-10-17 10:27:49,809 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-10-17 10:27:49,810 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-10-17 10:27:49,981 INFO L356 Elim1Store]: treesize reduction 34, result has 24.4 percent of original size [2022-10-17 10:27:49,982 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-10-17 10:27:50,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 10:27:50,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:27:50,198 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: var is still there: |v_#memory_$Pointer$.base_44| input size 40 context size 40 output size 40 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1(Elim1Store.java:364) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:427) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:190) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne3(DualJunctionSaa.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne2(DualJunctionSaa.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne1(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne0(DualJunctionSaa.java:122) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:108) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:627) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:606) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:528) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:332) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:90) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-10-17 10:27:50,202 INFO L158 Benchmark]: Toolchain (without parser) took 8270.85ms. Allocated memory was 136.3MB in the beginning and 163.6MB in the end (delta: 27.3MB). Free memory was 104.8MB in the beginning and 68.6MB in the end (delta: 36.1MB). Peak memory consumption was 65.2MB. Max. memory is 16.1GB. [2022-10-17 10:27:50,202 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 136.3MB. Free memory is still 89.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-10-17 10:27:50,202 INFO L158 Benchmark]: CACSL2BoogieTranslator took 636.08ms. Allocated memory is still 136.3MB. Free memory was 104.5MB in the beginning and 101.2MB in the end (delta: 3.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-10-17 10:27:50,203 INFO L158 Benchmark]: Boogie Procedure Inliner took 81.44ms. Allocated memory is still 136.3MB. Free memory was 101.2MB in the beginning and 99.1MB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-10-17 10:27:50,203 INFO L158 Benchmark]: Boogie Preprocessor took 66.26ms. Allocated memory is still 136.3MB. Free memory was 99.1MB in the beginning and 97.7MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2022-10-17 10:27:50,203 INFO L158 Benchmark]: RCFGBuilder took 633.10ms. Allocated memory is still 136.3MB. Free memory was 97.0MB in the beginning and 81.0MB in the end (delta: 16.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-10-17 10:27:50,204 INFO L158 Benchmark]: TraceAbstraction took 6846.82ms. Allocated memory was 136.3MB in the beginning and 163.6MB in the end (delta: 27.3MB). Free memory was 80.9MB in the beginning and 68.6MB in the end (delta: 12.3MB). Peak memory consumption was 43.7MB. Max. memory is 16.1GB. [2022-10-17 10:27:50,206 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 136.3MB. Free memory is still 89.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 636.08ms. Allocated memory is still 136.3MB. Free memory was 104.5MB in the beginning and 101.2MB in the end (delta: 3.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 81.44ms. Allocated memory is still 136.3MB. Free memory was 101.2MB in the beginning and 99.1MB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 66.26ms. Allocated memory is still 136.3MB. Free memory was 99.1MB in the beginning and 97.7MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 633.10ms. Allocated memory is still 136.3MB. Free memory was 97.0MB in the beginning and 81.0MB in the end (delta: 16.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 6846.82ms. Allocated memory was 136.3MB in the beginning and 163.6MB in the end (delta: 27.3MB). Free memory was 80.9MB in the beginning and 68.6MB in the end (delta: 12.3MB). Peak memory consumption was 43.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: var is still there: |v_#memory_$Pointer$.base_44| input size 40 context size 40 output size 40 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: var is still there: |v_#memory_$Pointer$.base_44| input size 40 context size 40 output size 40: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1(Elim1Store.java:364) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-10-17 10:27:50,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/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_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-simple/dll2c_update_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/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 6bfeee33a1b1d098a34bec7a761d4de16bc595043f21d77f5851cba758b79f34 --- 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 10:27:52,761 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:27:52,763 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:27:52,804 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:27:52,805 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:27:52,808 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:27:52,811 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:27:52,819 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:27:52,824 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:27:52,830 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:27:52,832 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:27:52,834 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:27:52,835 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:27:52,838 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:27:52,840 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:27:52,842 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:27:52,844 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:27:52,845 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:27:52,847 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:27:52,869 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:27:52,871 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:27:52,875 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:27:52,878 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:27:52,880 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:27:52,890 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:27:52,891 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:27:52,891 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:27:52,893 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:27:52,894 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:27:52,896 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:27:52,896 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:27:52,897 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:27:52,899 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:27:52,900 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:27:52,901 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:27:52,901 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:27:52,902 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:27:52,903 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:27:52,903 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:27:52,905 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:27:52,906 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:27:52,907 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-10-17 10:27:52,956 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:27:52,957 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:27:52,957 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:27:52,958 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:27:52,959 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:27:52,959 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:27:52,960 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:27:52,961 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:27:52,961 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:27:52,961 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:27:52,962 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:27:52,962 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:27:52,963 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:27:52,963 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:27:52,963 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:27:52,964 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:27:52,964 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-17 10:27:52,964 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-10-17 10:27:52,964 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-10-17 10:27:52,965 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:27:52,965 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:27:52,965 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:27:52,965 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:27:52,966 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:27:52,966 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:27:52,966 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:27:52,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:27:52,967 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:27:52,967 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:27:52,967 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:27:52,968 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-10-17 10:27:52,968 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-10-17 10:27:52,968 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:27:52,969 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:27:52,969 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:27:52,969 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-10-17 10:27:52,969 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6bfeee33a1b1d098a34bec7a761d4de16bc595043f21d77f5851cba758b79f34 [2022-10-17 10:27:53,376 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:27:53,400 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:27:53,403 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:27:53,404 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:27:53,405 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:27:53,406 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/list-simple/dll2c_update_all.i [2022-10-17 10:27:53,473 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/data/4bfd2922b/78d4e81c2eed4ff48158fba913424612/FLAG4fbb27cd2 [2022-10-17 10:27:54,058 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:27:54,058 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/sv-benchmarks/c/list-simple/dll2c_update_all.i [2022-10-17 10:27:54,073 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/data/4bfd2922b/78d4e81c2eed4ff48158fba913424612/FLAG4fbb27cd2 [2022-10-17 10:27:54,360 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/data/4bfd2922b/78d4e81c2eed4ff48158fba913424612 [2022-10-17 10:27:54,363 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:27:54,365 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:27:54,366 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:27:54,366 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:27:54,375 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:27:54,376 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:27:54" (1/1) ... [2022-10-17 10:27:54,378 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b59b73d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:27:54, skipping insertion in model container [2022-10-17 10:27:54,379 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:27:54" (1/1) ... [2022-10-17 10:27:54,387 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:27:54,444 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:27:54,832 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_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/sv-benchmarks/c/list-simple/dll2c_update_all.i[24538,24551] [2022-10-17 10:27:54,835 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:27:54,849 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:27:54,897 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_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/sv-benchmarks/c/list-simple/dll2c_update_all.i[24538,24551] [2022-10-17 10:27:54,898 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:27:54,936 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:27:54,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:27:54 WrapperNode [2022-10-17 10:27:54,936 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:27:54,938 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:27:54,938 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:27:54,938 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:27:54,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:27:54" (1/1) ... [2022-10-17 10:27:54,979 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:27:54" (1/1) ... [2022-10-17 10:27:55,028 INFO L138 Inliner]: procedures = 129, calls = 29, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 131 [2022-10-17 10:27:55,029 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:27:55,031 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:27:55,032 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:27:55,032 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:27:55,042 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:27:54" (1/1) ... [2022-10-17 10:27:55,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:27:54" (1/1) ... [2022-10-17 10:27:55,064 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:27:54" (1/1) ... [2022-10-17 10:27:55,066 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:27:54" (1/1) ... [2022-10-17 10:27:55,077 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:27:54" (1/1) ... [2022-10-17 10:27:55,088 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:27:54" (1/1) ... [2022-10-17 10:27:55,097 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:27:54" (1/1) ... [2022-10-17 10:27:55,101 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:27:54" (1/1) ... [2022-10-17 10:27:55,114 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:27:55,125 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:27:55,125 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:27:55,126 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:27:55,127 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:27:54" (1/1) ... [2022-10-17 10:27:55,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:27:55,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:27:55,167 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:27:55,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:27:55,217 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-10-17 10:27:55,217 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-10-17 10:27:55,217 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-10-17 10:27:55,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 10:27:55,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:27:55,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-17 10:27:55,218 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-17 10:27:55,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 10:27:55,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-10-17 10:27:55,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-10-17 10:27:55,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:27:55,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:27:55,419 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:27:55,422 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:27:55,787 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:27:55,794 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:27:55,794 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-10-17 10:27:55,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:27:55 BoogieIcfgContainer [2022-10-17 10:27:55,797 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:27:55,799 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:27:55,799 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:27:55,803 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:27:55,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:27:54" (1/3) ... [2022-10-17 10:27:55,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ba83e51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:27:55, skipping insertion in model container [2022-10-17 10:27:55,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:27:54" (2/3) ... [2022-10-17 10:27:55,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ba83e51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:27:55, skipping insertion in model container [2022-10-17 10:27:55,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:27:55" (3/3) ... [2022-10-17 10:27:55,807 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2c_update_all.i [2022-10-17 10:27:55,828 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:27:55,828 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:27:55,881 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:27:55,888 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;@477f93b3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:27:55,889 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 10:27:55,893 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 34 states have (on average 1.5) internal successors, (51), 35 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:27:55,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-17 10:27:55,902 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:27:55,903 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] [2022-10-17 10:27:55,904 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:27:55,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:27:55,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1387430191, now seen corresponding path program 1 times [2022-10-17 10:27:55,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-10-17 10:27:55,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2055311264] [2022-10-17 10:27:55,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:55,926 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 10:27:55,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/mathsat [2022-10-17 10:27:55,930 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 10:27:55,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-10-17 10:27:56,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:56,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 1 conjunts are in the unsatisfiable core [2022-10-17 10:27:56,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:27:56,145 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 10:27:56,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:27:56,146 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-10-17 10:27:56,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2055311264] [2022-10-17 10:27:56,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2055311264] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:27:56,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:27:56,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:27:56,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251415091] [2022-10-17 10:27:56,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:27:56,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 10:27:56,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-10-17 10:27:56,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 10:27:56,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 10:27:56,194 INFO L87 Difference]: Start difference. First operand has 39 states, 34 states have (on average 1.5) internal successors, (51), 35 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 10:27:56,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:27:56,220 INFO L93 Difference]: Finished difference Result 63 states and 90 transitions. [2022-10-17 10:27:56,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 10:27:56,223 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-10-17 10:27:56,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:27:56,231 INFO L225 Difference]: With dead ends: 63 [2022-10-17 10:27:56,232 INFO L226 Difference]: Without dead ends: 30 [2022-10-17 10:27:56,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 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 10:27:56,240 INFO L413 NwaCegarLoop]: 48 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, 48 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 10:27:56,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:27:56,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-10-17 10:27:56,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-10-17 10:27:56,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:27:56,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2022-10-17 10:27:56,283 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 20 [2022-10-17 10:27:56,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:27:56,285 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2022-10-17 10:27:56,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 10:27:56,285 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2022-10-17 10:27:56,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-17 10:27:56,287 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:27:56,287 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] [2022-10-17 10:27:56,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:27:56,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 [2022-10-17 10:27:56,506 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:27:56,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:27:56,507 INFO L85 PathProgramCache]: Analyzing trace with hash 498100996, now seen corresponding path program 1 times [2022-10-17 10:27:56,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-10-17 10:27:56,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2036698880] [2022-10-17 10:27:56,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:56,509 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 10:27:56,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/mathsat [2022-10-17 10:27:56,510 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 10:27:56,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-10-17 10:27:56,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:56,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 10:27:56,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:27:56,699 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 10:27:56,699 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:27:56,700 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-10-17 10:27:56,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2036698880] [2022-10-17 10:27:56,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2036698880] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:27:56,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:27:56,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:27:56,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632893551] [2022-10-17 10:27:56,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:27:56,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:27:56,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-10-17 10:27:56,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:27:56,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:27:56,704 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 10:27:56,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:27:56,724 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2022-10-17 10:27:56,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:27:56,725 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-10-17 10:27:56,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:27:56,726 INFO L225 Difference]: With dead ends: 51 [2022-10-17 10:27:56,727 INFO L226 Difference]: Without dead ends: 35 [2022-10-17 10:27:56,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 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 10:27:56,729 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 4 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:27:56,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 65 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:27:56,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-10-17 10:27:56,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2022-10-17 10:27:56,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:27:56,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-10-17 10:27:56,739 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 20 [2022-10-17 10:27:56,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:27:56,739 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-10-17 10:27:56,740 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 10:27:56,740 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-10-17 10:27:56,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-10-17 10:27:56,741 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:27:56,741 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-17 10:27:56,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:27:56,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 [2022-10-17 10:27:56,950 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:27:56,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:27:56,953 INFO L85 PathProgramCache]: Analyzing trace with hash 698671896, now seen corresponding path program 1 times [2022-10-17 10:27:56,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-10-17 10:27:56,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [204188567] [2022-10-17 10:27:56,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:56,955 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 10:27:56,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/mathsat [2022-10-17 10:27:56,956 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 10:27:56,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-10-17 10:27:57,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:57,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 10:27:57,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:27:57,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 10:27:57,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:27:57,183 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-10-17 10:27:57,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [204188567] [2022-10-17 10:27:57,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [204188567] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:27:57,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:27:57,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:27:57,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613308549] [2022-10-17 10:27:57,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:27:57,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:27:57,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-10-17 10:27:57,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:27:57,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:27:57,186 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:27:57,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:27:57,235 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2022-10-17 10:27:57,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:27:57,236 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-10-17 10:27:57,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:27:57,238 INFO L225 Difference]: With dead ends: 53 [2022-10-17 10:27:57,238 INFO L226 Difference]: Without dead ends: 44 [2022-10-17 10:27:57,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 27 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 10:27:57,240 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 31 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:27:57,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 64 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:27:57,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-10-17 10:27:57,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2022-10-17 10:27:57,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:27:57,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-10-17 10:27:57,251 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 30 [2022-10-17 10:27:57,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:27:57,252 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-10-17 10:27:57,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:27:57,253 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-10-17 10:27:57,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-10-17 10:27:57,254 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:27:57,255 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-17 10:27:57,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-10-17 10:27:57,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 [2022-10-17 10:27:57,469 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:27:57,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:27:57,469 INFO L85 PathProgramCache]: Analyzing trace with hash 143562896, now seen corresponding path program 1 times [2022-10-17 10:27:57,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-10-17 10:27:57,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [944989539] [2022-10-17 10:27:57,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:57,470 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 10:27:57,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/mathsat [2022-10-17 10:27:57,476 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 10:27:57,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-10-17 10:27:57,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:57,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 10:27:57,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:27:57,810 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 10:27:57,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:27:57,966 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 10:27:57,966 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-10-17 10:27:57,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [944989539] [2022-10-17 10:27:57,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [944989539] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:27:57,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:27:57,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-10-17 10:27:57,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183879946] [2022-10-17 10:27:57,968 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 10:27:57,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:27:57,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-10-17 10:27:57,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:27:57,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:27:57,970 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 10:27:58,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:27:58,131 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2022-10-17 10:27:58,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:27:58,132 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2022-10-17 10:27:58,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:27:58,134 INFO L225 Difference]: With dead ends: 66 [2022-10-17 10:27:58,134 INFO L226 Difference]: Without dead ends: 57 [2022-10-17 10:27:58,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-10-17 10:27:58,137 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 92 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:27:58,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 119 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:27:58,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-10-17 10:27:58,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 37. [2022-10-17 10:27:58,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:27:58,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2022-10-17 10:27:58,149 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 35 [2022-10-17 10:27:58,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:27:58,149 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2022-10-17 10:27:58,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 10:27:58,150 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2022-10-17 10:27:58,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-10-17 10:27:58,151 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:27:58,152 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-17 10:27:58,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-10-17 10:27:58,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 [2022-10-17 10:27:58,362 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:27:58,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:27:58,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1120694760, now seen corresponding path program 2 times [2022-10-17 10:27:58,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-10-17 10:27:58,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1174347888] [2022-10-17 10:27:58,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:27:58,364 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 10:27:58,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/mathsat [2022-10-17 10:27:58,365 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 10:27:58,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-10-17 10:27:58,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 10:27:58,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:27:58,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 5 conjunts are in the unsatisfiable core [2022-10-17 10:27:58,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:27:58,684 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 10:27:58,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:27:58,763 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 10:27:58,763 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-10-17 10:27:58,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1174347888] [2022-10-17 10:27:58,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1174347888] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:27:58,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:27:58,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-10-17 10:27:58,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908027849] [2022-10-17 10:27:58,772 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 10:27:58,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:27:58,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-10-17 10:27:58,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:27:58,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:27:58,774 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:27:58,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:27:58,976 INFO L93 Difference]: Finished difference Result 76 states and 92 transitions. [2022-10-17 10:27:58,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:27:58,977 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2022-10-17 10:27:58,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:27:58,978 INFO L225 Difference]: With dead ends: 76 [2022-10-17 10:27:58,979 INFO L226 Difference]: Without dead ends: 62 [2022-10-17 10:27:58,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-10-17 10:27:58,980 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 67 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:27:58,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 193 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:27:58,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-10-17 10:27:58,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 38. [2022-10-17 10:27:58,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:27:58,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2022-10-17 10:27:58,992 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 40 [2022-10-17 10:27:58,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:27:58,993 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2022-10-17 10:27:58,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:27:58,993 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2022-10-17 10:27:58,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-10-17 10:27:58,994 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:27:58,995 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-17 10:27:59,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-10-17 10:27:59,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 [2022-10-17 10:27:59,209 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:27:59,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:27:59,210 INFO L85 PathProgramCache]: Analyzing trace with hash 2115896417, now seen corresponding path program 1 times [2022-10-17 10:27:59,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-10-17 10:27:59,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [534697641] [2022-10-17 10:27:59,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:59,211 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 10:27:59,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/mathsat [2022-10-17 10:27:59,214 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 10:27:59,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-10-17 10:27:59,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:59,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 61 conjunts are in the unsatisfiable core [2022-10-17 10:27:59,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:27:59,562 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-10-17 10:27:59,781 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-10-17 10:27:59,783 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-10-17 10:27:59,847 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-10-17 10:27:59,922 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-10-17 10:28:00,098 INFO L356 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2022-10-17 10:28:00,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 29 [2022-10-17 10:28:00,454 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-10-17 10:28:00,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 10:28:00,502 INFO L356 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2022-10-17 10:28:00,502 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 34 [2022-10-17 10:28:00,803 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-10-17 10:28:00,804 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 14 [2022-10-17 10:28:00,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-10-17 10:28:01,162 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-17 10:28:01,276 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:28:01,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:28:01,625 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_349 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_dll_circular_update_at_~head#1.base| v_ArrVal_349) |c_ULTIMATE.start_main_~s~0#1.base|) (bvadd |c_ULTIMATE.start_main_~s~0#1.offset| (_ bv8 32))) |c_ULTIMATE.start_main_~len~0#1|)) is different from false [2022-10-17 10:28:01,651 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_349 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~len~0#1| (select (select (store |c_#memory_int| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_update_at_~head#1.base|) |c_ULTIMATE.start_dll_circular_update_at_~head#1.offset|) v_ArrVal_349) |c_ULTIMATE.start_main_~s~0#1.base|) (bvadd |c_ULTIMATE.start_main_~s~0#1.offset| (_ bv8 32))))) is different from false [2022-10-17 10:28:01,665 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_349 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) v_ArrVal_349) |c_ULTIMATE.start_main_~s~0#1.base|) (bvadd |c_ULTIMATE.start_main_~s~0#1.offset| (_ bv8 32))) |c_ULTIMATE.start_main_~len~0#1|)) is different from false [2022-10-17 10:28:01,696 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 10:28:01,696 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 37 [2022-10-17 10:28:01,726 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 10:28:01,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 63 [2022-10-17 10:28:01,740 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-10-17 10:28:04,171 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| (_ BitVec 32))) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)))) is different from false [2022-10-17 10:28:05,348 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| (_ BitVec 32))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))) is different from false [2022-10-17 10:28:05,366 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| (_ BitVec 32)) (v_ArrVal_338 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| v_ArrVal_338))) (store .cse0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select .cse0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))) is different from false [2022-10-17 10:28:05,383 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 10:28:05,384 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-10-17 10:28:05,421 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 10:28:05,421 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 295 treesize of output 285 [2022-10-17 10:28:05,445 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 294 treesize of output 278 [2022-10-17 10:28:05,569 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-10-17 10:28:05,580 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2022-10-17 10:28:06,293 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2022-10-17 10:28:06,293 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-10-17 10:28:06,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [534697641] [2022-10-17 10:28:06,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [534697641] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:28:06,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:28:06,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 41 [2022-10-17 10:28:06,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850327015] [2022-10-17 10:28:06,294 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 10:28:06,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-10-17 10:28:06,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-10-17 10:28:06,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-10-17 10:28:06,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1108, Unknown=6, NotChecked=426, Total=1640 [2022-10-17 10:28:06,297 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 41 states, 41 states have (on average 1.5853658536585367) internal successors, (65), 36 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 10:28:11,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:28:11,181 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2022-10-17 10:28:11,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-10-17 10:28:11,182 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.5853658536585367) internal successors, (65), 36 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 41 [2022-10-17 10:28:11,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:28:11,184 INFO L225 Difference]: With dead ends: 75 [2022-10-17 10:28:11,184 INFO L226 Difference]: Without dead ends: 73 [2022-10-17 10:28:11,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 6 IntricatePredicates, 2 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=168, Invalid=1830, Unknown=6, NotChecked=546, Total=2550 [2022-10-17 10:28:11,186 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 24 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 321 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-10-17 10:28:11,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 625 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 398 Invalid, 0 Unknown, 321 Unchecked, 1.5s Time] [2022-10-17 10:28:11,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-10-17 10:28:11,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2022-10-17 10:28:11,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 58 states have internal predecessors, (71), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 10:28:11,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2022-10-17 10:28:11,220 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 41 [2022-10-17 10:28:11,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:28:11,221 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2022-10-17 10:28:11,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.5853658536585367) internal successors, (65), 36 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 10:28:11,222 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2022-10-17 10:28:11,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-10-17 10:28:11,232 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:28:11,232 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-17 10:28:11,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-10-17 10:28:11,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 [2022-10-17 10:28:11,449 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:28:11,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:28:11,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1219933381, now seen corresponding path program 1 times [2022-10-17 10:28:11,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-10-17 10:28:11,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1147614349] [2022-10-17 10:28:11,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:28:11,450 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 10:28:11,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/mathsat [2022-10-17 10:28:11,451 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 10:28:11,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-10-17 10:28:11,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:28:11,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 10:28:11,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:28:11,669 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-10-17 10:28:11,670 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:28:11,670 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-10-17 10:28:11,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1147614349] [2022-10-17 10:28:11,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1147614349] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:28:11,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:28:11,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:28:11,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192006459] [2022-10-17 10:28:11,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:28:11,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:28:11,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-10-17 10:28:11,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:28:11,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:28:11,673 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:28:11,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:28:11,760 INFO L93 Difference]: Finished difference Result 80 states and 96 transitions. [2022-10-17 10:28:11,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:28:11,761 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2022-10-17 10:28:11,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:28:11,766 INFO L225 Difference]: With dead ends: 80 [2022-10-17 10:28:11,766 INFO L226 Difference]: Without dead ends: 72 [2022-10-17 10:28:11,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 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 10:28:11,769 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 18 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:28:11,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 91 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:28:11,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-10-17 10:28:11,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 65. [2022-10-17 10:28:11,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.2) internal successors, (72), 60 states have internal predecessors, (72), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 10:28:11,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2022-10-17 10:28:11,809 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 42 [2022-10-17 10:28:11,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:28:11,810 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2022-10-17 10:28:11,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:28:11,810 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2022-10-17 10:28:11,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-10-17 10:28:11,813 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:28:11,813 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-17 10:28:11,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-10-17 10:28:12,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 [2022-10-17 10:28:12,030 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:28:12,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:28:12,030 INFO L85 PathProgramCache]: Analyzing trace with hash -628992200, now seen corresponding path program 2 times [2022-10-17 10:28:12,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-10-17 10:28:12,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1815120890] [2022-10-17 10:28:12,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:28:12,031 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 10:28:12,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/mathsat [2022-10-17 10:28:12,033 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 10:28:12,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-10-17 10:28:12,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 10:28:12,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:28:12,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 10:28:12,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:28:12,325 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 10:28:12,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:28:12,424 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 10:28:12,424 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-10-17 10:28:12,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1815120890] [2022-10-17 10:28:12,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1815120890] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:28:12,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:28:12,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-10-17 10:28:12,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812547479] [2022-10-17 10:28:12,425 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 10:28:12,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-17 10:28:12,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-10-17 10:28:12,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-17 10:28:12,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:28:12,427 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:28:12,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:28:12,616 INFO L93 Difference]: Finished difference Result 132 states and 154 transitions. [2022-10-17 10:28:12,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-17 10:28:12,617 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2022-10-17 10:28:12,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:28:12,618 INFO L225 Difference]: With dead ends: 132 [2022-10-17 10:28:12,618 INFO L226 Difference]: Without dead ends: 110 [2022-10-17 10:28:12,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-10-17 10:28:12,620 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 197 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:28:12,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 179 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:28:12,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-10-17 10:28:12,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 67. [2022-10-17 10:28:12,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 62 states have internal predecessors, (71), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 10:28:12,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2022-10-17 10:28:12,652 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 42 [2022-10-17 10:28:12,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:28:12,653 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2022-10-17 10:28:12,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:28:12,654 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2022-10-17 10:28:12,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-10-17 10:28:12,656 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:28:12,657 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-17 10:28:12,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-10-17 10:28:12,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 [2022-10-17 10:28:12,872 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:28:12,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:28:12,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1999508780, now seen corresponding path program 1 times [2022-10-17 10:28:12,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-10-17 10:28:12,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2125004135] [2022-10-17 10:28:12,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:28:12,873 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 10:28:12,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/mathsat [2022-10-17 10:28:12,873 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 10:28:12,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-10-17 10:28:13,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:28:13,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 5 conjunts are in the unsatisfiable core [2022-10-17 10:28:13,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:28:13,137 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-10-17 10:28:13,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:28:13,203 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-10-17 10:28:13,203 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-10-17 10:28:13,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2125004135] [2022-10-17 10:28:13,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2125004135] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:28:13,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:28:13,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-10-17 10:28:13,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645202770] [2022-10-17 10:28:13,204 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 10:28:13,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:28:13,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-10-17 10:28:13,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:28:13,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:28:13,205 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:28:13,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:28:13,394 INFO L93 Difference]: Finished difference Result 97 states and 112 transitions. [2022-10-17 10:28:13,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:28:13,395 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 47 [2022-10-17 10:28:13,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:28:13,396 INFO L225 Difference]: With dead ends: 97 [2022-10-17 10:28:13,396 INFO L226 Difference]: Without dead ends: 89 [2022-10-17 10:28:13,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-10-17 10:28:13,398 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 59 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:28:13,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 185 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:28:13,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-10-17 10:28:13,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 68. [2022-10-17 10:28:13,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.1428571428571428) internal successors, (72), 63 states have internal predecessors, (72), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 10:28:13,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2022-10-17 10:28:13,430 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 47 [2022-10-17 10:28:13,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:28:13,430 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2022-10-17 10:28:13,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:28:13,431 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2022-10-17 10:28:13,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-10-17 10:28:13,432 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:28:13,432 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2022-10-17 10:28:13,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7f8772-5f91-4ab5-8df9-2886a9753b6f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0