./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-lit/gj2007.c.i.p+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_175ebde7-8e73-42f7-8cae-2696b13fdc9d/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_175ebde7-8e73-42f7-8cae-2696b13fdc9d/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_175ebde7-8e73-42f7-8cae-2696b13fdc9d/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_175ebde7-8e73-42f7-8cae-2696b13fdc9d/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-lit/gj2007.c.i.p+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_175ebde7-8e73-42f7-8cae-2696b13fdc9d/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_175ebde7-8e73-42f7-8cae-2696b13fdc9d/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 1ae3736aabcb020d122100864e41791456e1f94490735ab1a93eef5c54883fe7 --- 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 10:24:20,394 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:24:20,397 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:24:20,438 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:24:20,439 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:24:20,444 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:24:20,448 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:24:20,453 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:24:20,457 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:24:20,464 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:24:20,466 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:24:20,469 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:24:20,470 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:24:20,473 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:24:20,475 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:24:20,478 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:24:20,481 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:24:20,482 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:24:20,485 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:24:20,497 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:24:20,500 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:24:20,504 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:24:20,509 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:24:20,511 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:24:20,523 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:24:20,525 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:24:20,526 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:24:20,529 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:24:20,529 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:24:20,531 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:24:20,532 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:24:20,533 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:24:20,536 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:24:20,538 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:24:20,539 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:24:20,540 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:24:20,541 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:24:20,541 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:24:20,542 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:24:20,543 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:24:20,544 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:24:20,545 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_175ebde7-8e73-42f7-8cae-2696b13fdc9d/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:24:20,598 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:24:20,599 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:24:20,599 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:24:20,600 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:24:20,600 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:24:20,601 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:24:20,602 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:24:20,602 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:24:20,602 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:24:20,603 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:24:20,603 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:24:20,603 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:24:20,604 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:24:20,604 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:24:20,604 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:24:20,605 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:24:20,605 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:24:20,605 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:24:20,606 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:24:20,606 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:24:20,606 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:24:20,607 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:24:20,607 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:24:20,607 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:24:20,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:24:20,608 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:24:20,608 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:24:20,609 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:24:20,609 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:24:20,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:24:20,609 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:24:20,610 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:24:20,610 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:24:20,610 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_175ebde7-8e73-42f7-8cae-2696b13fdc9d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_175ebde7-8e73-42f7-8cae-2696b13fdc9d/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ae3736aabcb020d122100864e41791456e1f94490735ab1a93eef5c54883fe7 [2022-10-17 10:24:20,979 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:24:21,019 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:24:21,023 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:24:21,024 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:24:21,025 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:24:21,027 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_175ebde7-8e73-42f7-8cae-2696b13fdc9d/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/loop-lit/gj2007.c.i.p+lhb-reducer.c [2022-10-17 10:24:21,108 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_175ebde7-8e73-42f7-8cae-2696b13fdc9d/bin/uautomizer-J5u9QxTXDZ/data/9c3a39a01/f375254da7024326aceb454a79e4a226/FLAG0fb2a24f6 [2022-10-17 10:24:21,663 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:24:21,668 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_175ebde7-8e73-42f7-8cae-2696b13fdc9d/sv-benchmarks/c/loop-lit/gj2007.c.i.p+lhb-reducer.c [2022-10-17 10:24:21,680 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_175ebde7-8e73-42f7-8cae-2696b13fdc9d/bin/uautomizer-J5u9QxTXDZ/data/9c3a39a01/f375254da7024326aceb454a79e4a226/FLAG0fb2a24f6 [2022-10-17 10:24:21,998 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_175ebde7-8e73-42f7-8cae-2696b13fdc9d/bin/uautomizer-J5u9QxTXDZ/data/9c3a39a01/f375254da7024326aceb454a79e4a226 [2022-10-17 10:24:22,001 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:24:22,003 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:24:22,008 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:24:22,008 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:24:22,012 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:24:22,013 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:24:21" (1/1) ... [2022-10-17 10:24:22,016 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e1d609 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:22, skipping insertion in model container [2022-10-17 10:24:22,016 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:24:21" (1/1) ... [2022-10-17 10:24:22,035 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:24:22,071 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:24:22,382 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_175ebde7-8e73-42f7-8cae-2696b13fdc9d/sv-benchmarks/c/loop-lit/gj2007.c.i.p+lhb-reducer.c[1613,1626] [2022-10-17 10:24:22,404 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:24:22,428 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:24:22,451 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_175ebde7-8e73-42f7-8cae-2696b13fdc9d/sv-benchmarks/c/loop-lit/gj2007.c.i.p+lhb-reducer.c[1613,1626] [2022-10-17 10:24:22,459 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:24:22,475 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:24:22,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:22 WrapperNode [2022-10-17 10:24:22,476 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:24:22,477 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:24:22,478 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:24:22,478 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:24:22,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:22" (1/1) ... [2022-10-17 10:24:22,505 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:22" (1/1) ... [2022-10-17 10:24:22,541 INFO L138 Inliner]: procedures = 14, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 115 [2022-10-17 10:24:22,541 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:24:22,542 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:24:22,543 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:24:22,543 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:24:22,554 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:22" (1/1) ... [2022-10-17 10:24:22,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:22" (1/1) ... [2022-10-17 10:24:22,567 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:22" (1/1) ... [2022-10-17 10:24:22,568 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:22" (1/1) ... [2022-10-17 10:24:22,576 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:22" (1/1) ... [2022-10-17 10:24:22,586 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:22" (1/1) ... [2022-10-17 10:24:22,587 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:22" (1/1) ... [2022-10-17 10:24:22,594 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:22" (1/1) ... [2022-10-17 10:24:22,596 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:24:22,598 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:24:22,598 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:24:22,598 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:24:22,602 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:22" (1/1) ... [2022-10-17 10:24:22,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:24:22,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_175ebde7-8e73-42f7-8cae-2696b13fdc9d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:24:22,655 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_175ebde7-8e73-42f7-8cae-2696b13fdc9d/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:24:22,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_175ebde7-8e73-42f7-8cae-2696b13fdc9d/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:24:22,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:24:22,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:24:22,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:24:22,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:24:22,800 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:24:22,803 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:24:23,113 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:24:23,121 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:24:23,121 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-10-17 10:24:23,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:24:23 BoogieIcfgContainer [2022-10-17 10:24:23,124 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:24:23,127 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:24:23,127 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:24:23,132 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:24:23,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:24:21" (1/3) ... [2022-10-17 10:24:23,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e4c22ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:24:23, skipping insertion in model container [2022-10-17 10:24:23,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:22" (2/3) ... [2022-10-17 10:24:23,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e4c22ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:24:23, skipping insertion in model container [2022-10-17 10:24:23,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:24:23" (3/3) ... [2022-10-17 10:24:23,135 INFO L112 eAbstractionObserver]: Analyzing ICFG gj2007.c.i.p+lhb-reducer.c [2022-10-17 10:24:23,158 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:24:23,159 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:24:23,265 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:24:23,274 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;@29a9b11d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:24:23,274 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 10:24:23,286 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:24:23,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-10-17 10:24:23,312 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:24:23,313 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:24:23,313 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:24:23,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:24:23,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1745867070, now seen corresponding path program 1 times [2022-10-17 10:24:23,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:24:23,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615204311] [2022-10-17 10:24:23,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:24:23,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:24:23,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:23,700 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 10:24:23,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:24:23,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615204311] [2022-10-17 10:24:23,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615204311] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:24:23,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:24:23,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:24:23,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641748363] [2022-10-17 10:24:23,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:24:23,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:24:23,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:24:23,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:24:23,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:24:23,765 INFO L87 Difference]: Start difference. First operand has 28 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:24:23,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:24:23,923 INFO L93 Difference]: Finished difference Result 52 states and 90 transitions. [2022-10-17 10:24:23,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:24:23,927 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-10-17 10:24:23,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:24:23,940 INFO L225 Difference]: With dead ends: 52 [2022-10-17 10:24:23,941 INFO L226 Difference]: Without dead ends: 25 [2022-10-17 10:24:23,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:24:23,962 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:24:23,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 49 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:24:23,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-10-17 10:24:24,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-10-17 10:24:24,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:24:24,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2022-10-17 10:24:24,011 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 23 [2022-10-17 10:24:24,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:24:24,012 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2022-10-17 10:24:24,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:24:24,012 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2022-10-17 10:24:24,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-10-17 10:24:24,014 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:24:24,014 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:24:24,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:24:24,015 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:24:24,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:24:24,016 INFO L85 PathProgramCache]: Analyzing trace with hash -936932661, now seen corresponding path program 1 times [2022-10-17 10:24:24,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:24:24,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138409818] [2022-10-17 10:24:24,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:24:24,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:24:24,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:24,178 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 10:24:24,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:24:24,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138409818] [2022-10-17 10:24:24,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138409818] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:24:24,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:24:24,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:24:24,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575351492] [2022-10-17 10:24:24,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:24:24,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:24:24,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:24:24,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:24:24,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:24:24,188 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:24:24,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:24:24,293 INFO L93 Difference]: Finished difference Result 44 states and 61 transitions. [2022-10-17 10:24:24,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:24:24,294 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-10-17 10:24:24,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:24:24,295 INFO L225 Difference]: With dead ends: 44 [2022-10-17 10:24:24,295 INFO L226 Difference]: Without dead ends: 25 [2022-10-17 10:24:24,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 10:24:24,298 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:24:24,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 32 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:24:24,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-10-17 10:24:24,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-10-17 10:24:24,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:24:24,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2022-10-17 10:24:24,306 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 23 [2022-10-17 10:24:24,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:24:24,307 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2022-10-17 10:24:24,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:24:24,307 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2022-10-17 10:24:24,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-10-17 10:24:24,308 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:24:24,309 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:24:24,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:24:24,309 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:24:24,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:24:24,310 INFO L85 PathProgramCache]: Analyzing trace with hash -2008089875, now seen corresponding path program 1 times [2022-10-17 10:24:24,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:24:24,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961845251] [2022-10-17 10:24:24,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:24:24,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:24:24,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:24,400 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 10:24:24,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:24:24,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961845251] [2022-10-17 10:24:24,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961845251] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:24:24,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:24:24,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:24:24,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384721715] [2022-10-17 10:24:24,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:24:24,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:24:24,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:24:24,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:24:24,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:24:24,417 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:24:24,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:24:24,513 INFO L93 Difference]: Finished difference Result 54 states and 76 transitions. [2022-10-17 10:24:24,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:24:24,514 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-10-17 10:24:24,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:24:24,515 INFO L225 Difference]: With dead ends: 54 [2022-10-17 10:24:24,516 INFO L226 Difference]: Without dead ends: 39 [2022-10-17 10:24:24,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:24:24,518 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 9 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:24:24,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 21 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:24:24,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-10-17 10:24:24,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-10-17 10:24:24,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:24:24,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2022-10-17 10:24:24,530 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 23 [2022-10-17 10:24:24,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:24:24,531 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2022-10-17 10:24:24,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:24:24,532 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2022-10-17 10:24:24,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-10-17 10:24:24,533 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:24:24,533 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:24:24,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 10:24:24,534 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:24:24,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:24:24,535 INFO L85 PathProgramCache]: Analyzing trace with hash 635511084, now seen corresponding path program 1 times [2022-10-17 10:24:24,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:24:24,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819585179] [2022-10-17 10:24:24,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:24:24,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:24:24,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:24,726 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 10:24:24,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:24:24,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819585179] [2022-10-17 10:24:24,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819585179] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:24:24,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:24:24,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 10:24:24,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619509543] [2022-10-17 10:24:24,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:24:24,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:24:24,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:24:24,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:24:24,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:24:24,730 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:24:24,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:24:24,802 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2022-10-17 10:24:24,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:24:24,803 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-10-17 10:24:24,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:24:24,804 INFO L225 Difference]: With dead ends: 52 [2022-10-17 10:24:24,804 INFO L226 Difference]: Without dead ends: 35 [2022-10-17 10:24:24,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:24:24,807 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 5 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:24:24,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 26 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:24:24,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-10-17 10:24:24,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-10-17 10:24:24,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:24:24,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2022-10-17 10:24:24,826 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 23 [2022-10-17 10:24:24,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:24:24,827 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2022-10-17 10:24:24,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:24:24,828 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2022-10-17 10:24:24,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-10-17 10:24:24,832 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:24:24,832 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:24:24,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 10:24:24,833 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:24:24,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:24:24,835 INFO L85 PathProgramCache]: Analyzing trace with hash 602818777, now seen corresponding path program 1 times [2022-10-17 10:24:24,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:24:24,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094021726] [2022-10-17 10:24:24,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:24:24,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:24:24,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:25,015 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 10:24:25,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:24:25,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094021726] [2022-10-17 10:24:25,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094021726] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:24:25,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:24:25,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-17 10:24:25,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544867314] [2022-10-17 10:24:25,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:24:25,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:24:25,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:24:25,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:24:25,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:24:25,023 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:24:25,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:24:25,151 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2022-10-17 10:24:25,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:24:25,152 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-10-17 10:24:25,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:24:25,153 INFO L225 Difference]: With dead ends: 44 [2022-10-17 10:24:25,153 INFO L226 Difference]: Without dead ends: 31 [2022-10-17 10:24:25,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:24:25,156 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:24:25,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 32 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:24:25,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-10-17 10:24:25,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-10-17 10:24:25,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:24:25,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-10-17 10:24:25,165 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 23 [2022-10-17 10:24:25,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:24:25,165 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-10-17 10:24:25,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:24:25,166 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-10-17 10:24:25,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-10-17 10:24:25,167 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:24:25,167 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:24:25,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 10:24:25,168 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:24:25,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:24:25,169 INFO L85 PathProgramCache]: Analyzing trace with hash -218545361, now seen corresponding path program 1 times [2022-10-17 10:24:25,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:24:25,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854695336] [2022-10-17 10:24:25,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:24:25,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:24:25,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:25,232 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 10:24:25,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:24:25,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854695336] [2022-10-17 10:24:25,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854695336] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:24:25,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:24:25,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:24:25,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206350731] [2022-10-17 10:24:25,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:24:25,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:24:25,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:24:25,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:24:25,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:24:25,237 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:24:25,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:24:25,291 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-10-17 10:24:25,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:24:25,292 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-10-17 10:24:25,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:24:25,301 INFO L225 Difference]: With dead ends: 34 [2022-10-17 10:24:25,302 INFO L226 Difference]: Without dead ends: 31 [2022-10-17 10:24:25,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:24:25,304 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:24:25,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 8 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:24:25,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-10-17 10:24:25,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-10-17 10:24:25,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:24:25,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-10-17 10:24:25,312 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 23 [2022-10-17 10:24:25,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:24:25,312 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-10-17 10:24:25,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:24:25,313 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-10-17 10:24:25,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-10-17 10:24:25,314 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:24:25,314 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:24:25,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 10:24:25,315 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:24:25,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:24:25,315 INFO L85 PathProgramCache]: Analyzing trace with hash -217919750, now seen corresponding path program 1 times [2022-10-17 10:24:25,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:24:25,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562392116] [2022-10-17 10:24:25,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:24:25,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:24:25,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:25,568 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 10:24:25,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:24:25,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562392116] [2022-10-17 10:24:25,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562392116] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:24:25,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:24:25,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-10-17 10:24:25,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335158913] [2022-10-17 10:24:25,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:24:25,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-17 10:24:25,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:24:25,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-17 10:24:25,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2022-10-17 10:24:25,577 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:24:25,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:24:25,678 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2022-10-17 10:24:25,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-17 10:24:25,681 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-10-17 10:24:25,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:24:25,682 INFO L225 Difference]: With dead ends: 36 [2022-10-17 10:24:25,683 INFO L226 Difference]: Without dead ends: 27 [2022-10-17 10:24:25,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2022-10-17 10:24:25,685 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 18 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:24:25,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 14 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:24:25,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-10-17 10:24:25,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-10-17 10:24:25,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:24:25,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-10-17 10:24:25,706 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 23 [2022-10-17 10:24:25,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:24:25,707 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-10-17 10:24:25,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:24:25,708 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-10-17 10:24:25,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-17 10:24:25,709 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:24:25,709 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:24:25,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-17 10:24:25,709 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:24:25,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:24:25,710 INFO L85 PathProgramCache]: Analyzing trace with hash 423767145, now seen corresponding path program 1 times [2022-10-17 10:24:25,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:24:25,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299153574] [2022-10-17 10:24:25,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:24:25,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:24:25,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:26,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:24:26,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:24:26,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299153574] [2022-10-17 10:24:26,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299153574] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:24:26,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:24:26,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-10-17 10:24:26,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108979078] [2022-10-17 10:24:26,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:24:26,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-17 10:24:26,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:24:26,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-17 10:24:26,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:24:26,012 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:24:26,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:24:26,117 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2022-10-17 10:24:26,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-17 10:24:26,118 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-10-17 10:24:26,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:24:26,124 INFO L225 Difference]: With dead ends: 34 [2022-10-17 10:24:26,125 INFO L226 Difference]: Without dead ends: 29 [2022-10-17 10:24:26,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:24:26,131 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 19 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:24:26,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 12 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:24:26,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-10-17 10:24:26,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-10-17 10:24:26,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:24:26,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-10-17 10:24:26,152 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 25 [2022-10-17 10:24:26,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:24:26,152 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-10-17 10:24:26,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:24:26,153 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-10-17 10:24:26,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-10-17 10:24:26,160 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:24:26,160 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-17 10:24:26,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-17 10:24:26,161 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:24:26,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:24:26,162 INFO L85 PathProgramCache]: Analyzing trace with hash -875092666, now seen corresponding path program 1 times [2022-10-17 10:24:26,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:24:26,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848885510] [2022-10-17 10:24:26,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:24:26,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:24:26,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:26,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:24:26,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:24:26,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848885510] [2022-10-17 10:24:26,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848885510] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:24:26,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239696843] [2022-10-17 10:24:26,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:24:26,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:24:26,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_175ebde7-8e73-42f7-8cae-2696b13fdc9d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:24:26,437 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_175ebde7-8e73-42f7-8cae-2696b13fdc9d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:24:26,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_175ebde7-8e73-42f7-8cae-2696b13fdc9d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:24:26,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:26,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-17 10:24:26,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:24:26,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:24:26,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:24:27,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:24:27,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239696843] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:24:27,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:24:27,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-10-17 10:24:27,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342342484] [2022-10-17 10:24:27,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:24:27,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-10-17 10:24:27,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:24:27,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-10-17 10:24:27,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-10-17 10:24:27,037 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:24:27,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:24:27,205 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2022-10-17 10:24:27,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-10-17 10:24:27,206 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-10-17 10:24:27,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:24:27,209 INFO L225 Difference]: With dead ends: 58 [2022-10-17 10:24:27,209 INFO L226 Difference]: Without dead ends: 53 [2022-10-17 10:24:27,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-10-17 10:24:27,217 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 68 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:24:27,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 18 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:24:27,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-10-17 10:24:27,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-10-17 10:24:27,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:24:27,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2022-10-17 10:24:27,244 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 27 [2022-10-17 10:24:27,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:24:27,245 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2022-10-17 10:24:27,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:24:27,245 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2022-10-17 10:24:27,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-10-17 10:24:27,250 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:24:27,251 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 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 10:24:27,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_175ebde7-8e73-42f7-8cae-2696b13fdc9d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:24:27,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_175ebde7-8e73-42f7-8cae-2696b13fdc9d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:24:27,471 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:24:27,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:24:27,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1668395554, now seen corresponding path program 2 times [2022-10-17 10:24:27,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:24:27,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716094592] [2022-10-17 10:24:27,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:24:27,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:24:27,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:28,137 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:24:28,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:24:28,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716094592] [2022-10-17 10:24:28,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716094592] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:24:28,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684869117] [2022-10-17 10:24:28,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:24:28,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:24:28,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_175ebde7-8e73-42f7-8cae-2696b13fdc9d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:24:28,148 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_175ebde7-8e73-42f7-8cae-2696b13fdc9d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:24:28,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_175ebde7-8e73-42f7-8cae-2696b13fdc9d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 10:24:28,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 10:24:28,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:24:28,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 24 conjunts are in the unsatisfiable core [2022-10-17 10:24:28,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:24:28,398 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:24:28,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:24:29,438 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:24:29,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684869117] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:24:29,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:24:29,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-10-17 10:24:29,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665751105] [2022-10-17 10:24:29,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:24:29,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-10-17 10:24:29,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:24:29,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-10-17 10:24:29,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-10-17 10:24:29,444 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:24:29,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:24:29,729 INFO L93 Difference]: Finished difference Result 106 states and 131 transitions. [2022-10-17 10:24:29,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-10-17 10:24:29,730 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-10-17 10:24:29,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:24:29,737 INFO L225 Difference]: With dead ends: 106 [2022-10-17 10:24:29,737 INFO L226 Difference]: Without dead ends: 101 [2022-10-17 10:24:29,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-10-17 10:24:29,741 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 99 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:24:29,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 18 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:24:29,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-10-17 10:24:29,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-10-17 10:24:29,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:24:29,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2022-10-17 10:24:29,772 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 51 [2022-10-17 10:24:29,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:24:29,773 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2022-10-17 10:24:29,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:24:29,773 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2022-10-17 10:24:29,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-10-17 10:24:29,781 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:24:29,781 INFO L195 NwaCegarLoop]: trace histogram [38, 37, 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 10:24:29,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_175ebde7-8e73-42f7-8cae-2696b13fdc9d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:24:30,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_175ebde7-8e73-42f7-8cae-2696b13fdc9d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-10-17 10:24:30,004 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:24:30,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:24:30,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1723682778, now seen corresponding path program 3 times [2022-10-17 10:24:30,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:24:30,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41705149] [2022-10-17 10:24:30,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:24:30,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:24:30,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:32,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 38 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:24:32,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:24:32,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41705149] [2022-10-17 10:24:32,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41705149] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:24:32,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547144951] [2022-10-17 10:24:32,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 10:24:32,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:24:32,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_175ebde7-8e73-42f7-8cae-2696b13fdc9d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:24:32,564 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_175ebde7-8e73-42f7-8cae-2696b13fdc9d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:24:32,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_175ebde7-8e73-42f7-8cae-2696b13fdc9d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 10:24:32,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-10-17 10:24:32,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:24:32,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 10:24:32,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:24:32,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 111 proven. 1 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2022-10-17 10:24:32,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:24:32,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 111 proven. 1 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2022-10-17 10:24:32,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547144951] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:24:32,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:24:32,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 4, 4] total 53 [2022-10-17 10:24:32,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367733055] [2022-10-17 10:24:32,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:24:32,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-10-17 10:24:32,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:24:32,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-10-17 10:24:32,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2022-10-17 10:24:32,858 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 53 states, 53 states have (on average 2.4150943396226414) internal successors, (128), 53 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:24:33,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:24:33,096 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2022-10-17 10:24:33,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-10-17 10:24:33,097 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.4150943396226414) internal successors, (128), 53 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2022-10-17 10:24:33,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:24:33,098 INFO L225 Difference]: With dead ends: 113 [2022-10-17 10:24:33,098 INFO L226 Difference]: Without dead ends: 108 [2022-10-17 10:24:33,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2022-10-17 10:24:33,101 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 111 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:24:33,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 23 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:24:33,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-10-17 10:24:33,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2022-10-17 10:24:33,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 107 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:24:33,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2022-10-17 10:24:33,114 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 99 [2022-10-17 10:24:33,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:24:33,115 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2022-10-17 10:24:33,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.4150943396226414) internal successors, (128), 53 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:24:33,116 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2022-10-17 10:24:33,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-10-17 10:24:33,117 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:24:33,117 INFO L195 NwaCegarLoop]: trace histogram [42, 38, 4, 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 10:24:33,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_175ebde7-8e73-42f7-8cae-2696b13fdc9d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 10:24:33,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_175ebde7-8e73-42f7-8cae-2696b13fdc9d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-10-17 10:24:33,332 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:24:33,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:24:33,333 INFO L85 PathProgramCache]: Analyzing trace with hash -640925019, now seen corresponding path program 4 times [2022-10-17 10:24:33,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:24:33,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794178878] [2022-10-17 10:24:33,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:24:33,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:24:33,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:35,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 273 proven. 1482 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-17 10:24:35,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:24:35,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794178878] [2022-10-17 10:24:35,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794178878] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:24:35,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108220178] [2022-10-17 10:24:35,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-17 10:24:35,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:24:35,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_175ebde7-8e73-42f7-8cae-2696b13fdc9d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:24:35,438 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_175ebde7-8e73-42f7-8cae-2696b13fdc9d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:24:35,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_175ebde7-8e73-42f7-8cae-2696b13fdc9d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 10:24:35,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-17 10:24:35,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:24:35,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 49 conjunts are in the unsatisfiable core [2022-10-17 10:24:35,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:24:35,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 273 proven. 1482 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-17 10:24:35,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:24:37,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 273 proven. 1482 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-17 10:24:37,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108220178] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:24:37,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:24:37,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 53 [2022-10-17 10:24:37,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032886946] [2022-10-17 10:24:37,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:24:37,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-10-17 10:24:37,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:24:37,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-10-17 10:24:37,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2022-10-17 10:24:37,440 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand has 53 states, 53 states have (on average 2.452830188679245) internal successors, (130), 53 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:24:37,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:24:37,655 INFO L93 Difference]: Finished difference Result 124 states and 128 transitions. [2022-10-17 10:24:37,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-10-17 10:24:37,656 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.452830188679245) internal successors, (130), 53 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2022-10-17 10:24:37,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:24:37,657 INFO L225 Difference]: With dead ends: 124 [2022-10-17 10:24:37,657 INFO L226 Difference]: Without dead ends: 114 [2022-10-17 10:24:37,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 165 SyntacticMatches, 46 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2022-10-17 10:24:37,661 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 33 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:24:37,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 15 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:24:37,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-10-17 10:24:37,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2022-10-17 10:24:37,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.0176991150442478) internal successors, (115), 113 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:24:37,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2022-10-17 10:24:37,673 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 107 [2022-10-17 10:24:37,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:24:37,674 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2022-10-17 10:24:37,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.452830188679245) internal successors, (130), 53 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:24:37,674 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2022-10-17 10:24:37,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-10-17 10:24:37,676 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:24:37,676 INFO L195 NwaCegarLoop]: trace histogram [45, 41, 4, 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 10:24:37,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_175ebde7-8e73-42f7-8cae-2696b13fdc9d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 10:24:37,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_175ebde7-8e73-42f7-8cae-2696b13fdc9d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-10-17 10:24:37,892 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:24:37,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:24:37,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1058630724, now seen corresponding path program 5 times [2022-10-17 10:24:37,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:24:37,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890779911] [2022-10-17 10:24:37,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:24:37,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:24:37,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:40,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:24:40,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:24:40,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890779911] [2022-10-17 10:24:40,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890779911] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:24:40,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637767478] [2022-10-17 10:24:40,335 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-10-17 10:24:40,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:24:40,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_175ebde7-8e73-42f7-8cae-2696b13fdc9d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:24:40,337 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_175ebde7-8e73-42f7-8cae-2696b13fdc9d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:24:40,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_175ebde7-8e73-42f7-8cae-2696b13fdc9d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 10:24:40,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2022-10-17 10:24:40,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:24:40,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 25 conjunts are in the unsatisfiable core [2022-10-17 10:24:40,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:24:41,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 484 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-10-17 10:24:41,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:24:43,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 484 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-10-17 10:24:43,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637767478] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:24:43,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:24:43,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 25, 25] total 98 [2022-10-17 10:24:43,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916757493] [2022-10-17 10:24:43,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:24:43,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-10-17 10:24:43,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:24:43,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-10-17 10:24:43,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2022-10-17 10:24:43,574 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand has 98 states, 98 states have (on average 2.2653061224489797) internal successors, (222), 98 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:24:44,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:24:44,167 INFO L93 Difference]: Finished difference Result 201 states and 243 transitions. [2022-10-17 10:24:44,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-10-17 10:24:44,168 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.2653061224489797) internal successors, (222), 98 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2022-10-17 10:24:44,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:24:44,170 INFO L225 Difference]: With dead ends: 201 [2022-10-17 10:24:44,170 INFO L226 Difference]: Without dead ends: 198 [2022-10-17 10:24:44,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2022-10-17 10:24:44,175 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 155 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 10:24:44,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 17 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 10:24:44,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-10-17 10:24:44,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2022-10-17 10:24:44,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.0101522842639594) internal successors, (199), 197 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:24:44,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 199 transitions. [2022-10-17 10:24:44,191 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 199 transitions. Word has length 113 [2022-10-17 10:24:44,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:24:44,192 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 199 transitions. [2022-10-17 10:24:44,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.2653061224489797) internal successors, (222), 98 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:24:44,193 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 199 transitions. [2022-10-17 10:24:44,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-10-17 10:24:44,195 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:24:44,195 INFO L195 NwaCegarLoop]: trace histogram [87, 46, 41, 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 10:24:44,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_175ebde7-8e73-42f7-8cae-2696b13fdc9d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-10-17 10:24:44,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_175ebde7-8e73-42f7-8cae-2696b13fdc9d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-10-17 10:24:44,410 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:24:44,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:24:44,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1561171392, now seen corresponding path program 6 times [2022-10-17 10:24:44,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:24:44,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013530158] [2022-10-17 10:24:44,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:24:44,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:24:44,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat