./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571f5c15-3034-456c-bba1-09ea129537f5/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571f5c15-3034-456c-bba1-09ea129537f5/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571f5c15-3034-456c-bba1-09ea129537f5/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571f5c15-3034-456c-bba1-09ea129537f5/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571f5c15-3034-456c-bba1-09ea129537f5/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571f5c15-3034-456c-bba1-09ea129537f5/bin/uautomizer-vX5HgA9Q3a --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 87f1dffc4791cf25ae510fd8866e3e496425d62832b1b02adb55ef79c14eda4f --- 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-b5237d8 [2022-11-21 17:21:13,484 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 17:21:13,486 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 17:21:13,509 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 17:21:13,510 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 17:21:13,515 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 17:21:13,519 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 17:21:13,523 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 17:21:13,525 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 17:21:13,533 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 17:21:13,535 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 17:21:13,537 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 17:21:13,537 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 17:21:13,543 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 17:21:13,544 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 17:21:13,545 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 17:21:13,546 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 17:21:13,546 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 17:21:13,548 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 17:21:13,549 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 17:21:13,550 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 17:21:13,555 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 17:21:13,557 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 17:21:13,558 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 17:21:13,567 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 17:21:13,568 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 17:21:13,568 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 17:21:13,570 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 17:21:13,570 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 17:21:13,571 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 17:21:13,572 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 17:21:13,573 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 17:21:13,574 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 17:21:13,575 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 17:21:13,576 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 17:21:13,576 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 17:21:13,577 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 17:21:13,577 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 17:21:13,577 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 17:21:13,579 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 17:21:13,579 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 17:21:13,580 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571f5c15-3034-456c-bba1-09ea129537f5/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 17:21:13,619 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 17:21:13,620 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 17:21:13,620 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 17:21:13,620 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 17:21:13,621 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 17:21:13,622 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 17:21:13,622 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 17:21:13,623 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 17:21:13,623 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 17:21:13,623 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 17:21:13,624 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 17:21:13,624 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 17:21:13,624 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 17:21:13,625 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 17:21:13,625 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 17:21:13,625 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 17:21:13,625 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 17:21:13,625 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 17:21:13,625 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 17:21:13,626 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 17:21:13,626 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 17:21:13,626 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 17:21:13,626 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 17:21:13,626 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 17:21:13,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 17:21:13,627 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 17:21:13,627 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 17:21:13,627 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 17:21:13,628 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 17:21:13,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 17:21:13,628 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 17:21:13,628 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 17:21:13,629 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 17:21:13,629 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_571f5c15-3034-456c-bba1-09ea129537f5/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571f5c15-3034-456c-bba1-09ea129537f5/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87f1dffc4791cf25ae510fd8866e3e496425d62832b1b02adb55ef79c14eda4f [2022-11-21 17:21:13,933 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 17:21:13,956 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 17:21:13,958 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 17:21:13,960 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 17:21:13,960 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 17:21:13,961 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571f5c15-3034-456c-bba1-09ea129537f5/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2022-11-21 17:21:17,067 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 17:21:17,397 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 17:21:17,398 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571f5c15-3034-456c-bba1-09ea129537f5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2022-11-21 17:21:17,407 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571f5c15-3034-456c-bba1-09ea129537f5/bin/uautomizer-vX5HgA9Q3a/data/9c7d4edb7/f8bae4e3476a4c689e739e32214f2be3/FLAG45b9de5c1 [2022-11-21 17:21:17,427 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571f5c15-3034-456c-bba1-09ea129537f5/bin/uautomizer-vX5HgA9Q3a/data/9c7d4edb7/f8bae4e3476a4c689e739e32214f2be3 [2022-11-21 17:21:17,430 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 17:21:17,434 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 17:21:17,435 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 17:21:17,436 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 17:21:17,439 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 17:21:17,440 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 05:21:17" (1/1) ... [2022-11-21 17:21:17,441 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47b5303c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:21:17, skipping insertion in model container [2022-11-21 17:21:17,441 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 05:21:17" (1/1) ... [2022-11-21 17:21:17,449 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 17:21:17,505 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 17:21:17,680 WARN L237 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_571f5c15-3034-456c-bba1-09ea129537f5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[4371,4384] [2022-11-21 17:21:17,704 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 17:21:17,718 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 17:21:17,750 WARN L237 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_571f5c15-3034-456c-bba1-09ea129537f5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[4371,4384] [2022-11-21 17:21:17,765 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 17:21:17,783 INFO L208 MainTranslator]: Completed translation [2022-11-21 17:21:17,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:21:17 WrapperNode [2022-11-21 17:21:17,783 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 17:21:17,785 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 17:21:17,785 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 17:21:17,785 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 17:21:17,793 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:21:17" (1/1) ... [2022-11-21 17:21:17,802 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:21:17" (1/1) ... [2022-11-21 17:21:17,827 INFO L138 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 332 [2022-11-21 17:21:17,828 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 17:21:17,829 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 17:21:17,835 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 17:21:17,835 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 17:21:17,844 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:21:17" (1/1) ... [2022-11-21 17:21:17,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:21:17" (1/1) ... [2022-11-21 17:21:17,848 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:21:17" (1/1) ... [2022-11-21 17:21:17,848 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:21:17" (1/1) ... [2022-11-21 17:21:17,854 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:21:17" (1/1) ... [2022-11-21 17:21:17,857 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:21:17" (1/1) ... [2022-11-21 17:21:17,859 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:21:17" (1/1) ... [2022-11-21 17:21:17,861 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:21:17" (1/1) ... [2022-11-21 17:21:17,864 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 17:21:17,864 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 17:21:17,865 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 17:21:17,865 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 17:21:17,866 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:21:17" (1/1) ... [2022-11-21 17:21:17,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 17:21:17,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571f5c15-3034-456c-bba1-09ea129537f5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:21:17,897 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571f5c15-3034-456c-bba1-09ea129537f5/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 17:21:17,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571f5c15-3034-456c-bba1-09ea129537f5/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 17:21:17,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 17:21:17,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 17:21:17,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 17:21:17,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 17:21:18,084 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 17:21:18,086 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 17:21:18,567 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 17:21:18,575 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 17:21:18,575 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-21 17:21:18,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 05:21:18 BoogieIcfgContainer [2022-11-21 17:21:18,577 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 17:21:18,580 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 17:21:18,580 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 17:21:18,593 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 17:21:18,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 05:21:17" (1/3) ... [2022-11-21 17:21:18,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@788aee9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 05:21:18, skipping insertion in model container [2022-11-21 17:21:18,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:21:17" (2/3) ... [2022-11-21 17:21:18,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@788aee9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 05:21:18, skipping insertion in model container [2022-11-21 17:21:18,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 05:21:18" (3/3) ... [2022-11-21 17:21:18,597 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2022-11-21 17:21:18,628 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 17:21:18,628 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 17:21:18,689 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 17:21:18,695 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;@201a35d7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 17:21:18,695 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-21 17:21:18,699 INFO L276 IsEmpty]: Start isEmpty. Operand has 85 states, 83 states have (on average 1.6867469879518073) internal successors, (140), 84 states have internal predecessors, (140), 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) [2022-11-21 17:21:18,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-21 17:21:18,711 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:21:18,713 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:21:18,713 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:21:18,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:21:18,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1258202004, now seen corresponding path program 1 times [2022-11-21 17:21:18,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:21:18,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131591982] [2022-11-21 17:21:18,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:21:18,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:21:18,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:21:19,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:21:19,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:21:19,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131591982] [2022-11-21 17:21:19,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131591982] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:21:19,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:21:19,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:21:19,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632119664] [2022-11-21 17:21:19,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:21:19,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 17:21:19,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:21:19,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 17:21:19,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:21:19,198 INFO L87 Difference]: Start difference. First operand has 85 states, 83 states have (on average 1.6867469879518073) internal successors, (140), 84 states have internal predecessors, (140), 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 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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) [2022-11-21 17:21:19,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:21:19,271 INFO L93 Difference]: Finished difference Result 199 states and 318 transitions. [2022-11-21 17:21:19,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:21:19,273 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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 37 [2022-11-21 17:21:19,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:21:19,283 INFO L225 Difference]: With dead ends: 199 [2022-11-21 17:21:19,283 INFO L226 Difference]: Without dead ends: 128 [2022-11-21 17:21:19,286 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 [2022-11-21 17:21:19,289 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 101 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 17:21:19,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 300 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 17:21:19,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-21 17:21:19,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2022-11-21 17:21:19,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.504) internal successors, (188), 125 states have internal predecessors, (188), 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) [2022-11-21 17:21:19,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 188 transitions. [2022-11-21 17:21:19,344 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 188 transitions. Word has length 37 [2022-11-21 17:21:19,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:21:19,344 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 188 transitions. [2022-11-21 17:21:19,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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) [2022-11-21 17:21:19,345 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 188 transitions. [2022-11-21 17:21:19,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-21 17:21:19,346 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:21:19,347 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:21:19,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 17:21:19,347 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:21:19,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:21:19,348 INFO L85 PathProgramCache]: Analyzing trace with hash 2004783502, now seen corresponding path program 1 times [2022-11-21 17:21:19,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:21:19,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12171048] [2022-11-21 17:21:19,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:21:19,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:21:19,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:21:19,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:21:19,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:21:19,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12171048] [2022-11-21 17:21:19,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12171048] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:21:19,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:21:19,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:21:19,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820343659] [2022-11-21 17:21:19,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:21:19,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 17:21:19,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:21:19,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 17:21:19,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:21:19,490 INFO L87 Difference]: Start difference. First operand 126 states and 188 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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) [2022-11-21 17:21:19,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:21:19,551 INFO L93 Difference]: Finished difference Result 306 states and 472 transitions. [2022-11-21 17:21:19,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:21:19,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 38 [2022-11-21 17:21:19,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:21:19,554 INFO L225 Difference]: With dead ends: 306 [2022-11-21 17:21:19,554 INFO L226 Difference]: Without dead ends: 200 [2022-11-21 17:21:19,555 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 [2022-11-21 17:21:19,556 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 81 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 17:21:19,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 254 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 17:21:19,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-11-21 17:21:19,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 198. [2022-11-21 17:21:19,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.5279187817258884) internal successors, (301), 197 states have internal predecessors, (301), 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) [2022-11-21 17:21:19,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 301 transitions. [2022-11-21 17:21:19,597 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 301 transitions. Word has length 38 [2022-11-21 17:21:19,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:21:19,597 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 301 transitions. [2022-11-21 17:21:19,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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) [2022-11-21 17:21:19,598 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 301 transitions. [2022-11-21 17:21:19,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-21 17:21:19,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:21:19,599 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:21:19,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 17:21:19,600 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:21:19,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:21:19,601 INFO L85 PathProgramCache]: Analyzing trace with hash 337157617, now seen corresponding path program 1 times [2022-11-21 17:21:19,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:21:19,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470250463] [2022-11-21 17:21:19,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:21:19,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:21:19,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:21:19,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:21:19,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:21:19,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470250463] [2022-11-21 17:21:19,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470250463] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:21:19,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:21:19,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:21:19,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283554332] [2022-11-21 17:21:19,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:21:19,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 17:21:19,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:21:19,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 17:21:19,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:21:19,685 INFO L87 Difference]: Start difference. First operand 198 states and 301 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:21:19,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:21:19,778 INFO L93 Difference]: Finished difference Result 490 states and 759 transitions. [2022-11-21 17:21:19,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:21:19,779 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-21 17:21:19,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:21:19,783 INFO L225 Difference]: With dead ends: 490 [2022-11-21 17:21:19,788 INFO L226 Difference]: Without dead ends: 312 [2022-11-21 17:21:19,789 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 [2022-11-21 17:21:19,790 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 76 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 17:21:19,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 239 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 17:21:19,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-11-21 17:21:19,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 310. [2022-11-21 17:21:19,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 1.5307443365695792) internal successors, (473), 309 states have internal predecessors, (473), 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) [2022-11-21 17:21:19,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 473 transitions. [2022-11-21 17:21:19,868 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 473 transitions. Word has length 39 [2022-11-21 17:21:19,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:21:19,869 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 473 transitions. [2022-11-21 17:21:19,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:21:19,869 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 473 transitions. [2022-11-21 17:21:19,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-21 17:21:19,876 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:21:19,876 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:21:19,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 17:21:19,878 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:21:19,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:21:19,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1621587317, now seen corresponding path program 1 times [2022-11-21 17:21:19,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:21:19,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642571079] [2022-11-21 17:21:19,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:21:19,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:21:19,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:21:20,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:21:20,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:21:20,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642571079] [2022-11-21 17:21:20,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642571079] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:21:20,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:21:20,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 17:21:20,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238666012] [2022-11-21 17:21:20,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:21:20,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 17:21:20,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:21:20,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 17:21:20,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 17:21:20,075 INFO L87 Difference]: Start difference. First operand 310 states and 473 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:21:20,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:21:20,301 INFO L93 Difference]: Finished difference Result 1470 states and 2285 transitions. [2022-11-21 17:21:20,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 17:21:20,302 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-21 17:21:20,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:21:20,307 INFO L225 Difference]: With dead ends: 1470 [2022-11-21 17:21:20,307 INFO L226 Difference]: Without dead ends: 1180 [2022-11-21 17:21:20,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-21 17:21:20,310 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 486 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:21:20,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 660 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:21:20,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2022-11-21 17:21:20,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 598. [2022-11-21 17:21:20,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 1.5226130653266332) internal successors, (909), 597 states have internal predecessors, (909), 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) [2022-11-21 17:21:20,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 909 transitions. [2022-11-21 17:21:20,409 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 909 transitions. Word has length 40 [2022-11-21 17:21:20,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:21:20,410 INFO L495 AbstractCegarLoop]: Abstraction has 598 states and 909 transitions. [2022-11-21 17:21:20,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:21:20,410 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 909 transitions. [2022-11-21 17:21:20,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-21 17:21:20,411 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:21:20,411 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:21:20,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 17:21:20,411 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:21:20,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:21:20,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1289857042, now seen corresponding path program 1 times [2022-11-21 17:21:20,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:21:20,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141826915] [2022-11-21 17:21:20,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:21:20,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:21:20,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:21:20,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:21:20,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:21:20,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141826915] [2022-11-21 17:21:20,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141826915] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:21:20,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:21:20,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 17:21:20,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103305208] [2022-11-21 17:21:20,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:21:20,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 17:21:20,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:21:20,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 17:21:20,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-21 17:21:20,592 INFO L87 Difference]: Start difference. First operand 598 states and 909 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:21:21,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:21:21,007 INFO L93 Difference]: Finished difference Result 2068 states and 3144 transitions. [2022-11-21 17:21:21,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 17:21:21,008 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-11-21 17:21:21,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:21:21,016 INFO L225 Difference]: With dead ends: 2068 [2022-11-21 17:21:21,016 INFO L226 Difference]: Without dead ends: 1490 [2022-11-21 17:21:21,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-21 17:21:21,025 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 317 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:21:21,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 362 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:21:21,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2022-11-21 17:21:21,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 1486. [2022-11-21 17:21:21,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1485 states have (on average 1.5063973063973064) internal successors, (2237), 1485 states have internal predecessors, (2237), 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) [2022-11-21 17:21:21,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 2237 transitions. [2022-11-21 17:21:21,359 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 2237 transitions. Word has length 41 [2022-11-21 17:21:21,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:21:21,359 INFO L495 AbstractCegarLoop]: Abstraction has 1486 states and 2237 transitions. [2022-11-21 17:21:21,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:21:21,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 2237 transitions. [2022-11-21 17:21:21,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-21 17:21:21,366 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:21:21,366 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:21:21,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 17:21:21,367 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:21:21,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:21:21,369 INFO L85 PathProgramCache]: Analyzing trace with hash 97793413, now seen corresponding path program 1 times [2022-11-21 17:21:21,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:21:21,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744969634] [2022-11-21 17:21:21,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:21:21,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:21:21,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:21:21,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:21:21,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:21:21,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744969634] [2022-11-21 17:21:21,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744969634] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:21:21,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:21:21,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 17:21:21,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430870387] [2022-11-21 17:21:21,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:21:21,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 17:21:21,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:21:21,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 17:21:21,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 17:21:21,498 INFO L87 Difference]: Start difference. First operand 1486 states and 2237 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:21:22,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:21:22,170 INFO L93 Difference]: Finished difference Result 4418 states and 6671 transitions. [2022-11-21 17:21:22,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 17:21:22,171 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-11-21 17:21:22,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:21:22,181 INFO L225 Difference]: With dead ends: 4418 [2022-11-21 17:21:22,182 INFO L226 Difference]: Without dead ends: 2952 [2022-11-21 17:21:22,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-21 17:21:22,190 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 496 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:21:22,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 139 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:21:22,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2952 states. [2022-11-21 17:21:22,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2952 to 2950. [2022-11-21 17:21:22,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2950 states, 2949 states have (on average 1.4991522550016956) internal successors, (4421), 2949 states have internal predecessors, (4421), 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) [2022-11-21 17:21:22,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2950 states to 2950 states and 4421 transitions. [2022-11-21 17:21:22,674 INFO L78 Accepts]: Start accepts. Automaton has 2950 states and 4421 transitions. Word has length 43 [2022-11-21 17:21:22,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:21:22,675 INFO L495 AbstractCegarLoop]: Abstraction has 2950 states and 4421 transitions. [2022-11-21 17:21:22,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:21:22,676 INFO L276 IsEmpty]: Start isEmpty. Operand 2950 states and 4421 transitions. [2022-11-21 17:21:22,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-21 17:21:22,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:21:22,678 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:21:22,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-21 17:21:22,678 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:21:22,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:21:22,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1723958080, now seen corresponding path program 1 times [2022-11-21 17:21:22,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:21:22,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88156300] [2022-11-21 17:21:22,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:21:22,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:21:22,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:21:22,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:21:22,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:21:22,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88156300] [2022-11-21 17:21:22,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88156300] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:21:22,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:21:22,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 17:21:22,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055425541] [2022-11-21 17:21:22,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:21:22,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 17:21:22,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:21:22,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 17:21:22,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 17:21:22,944 INFO L87 Difference]: Start difference. First operand 2950 states and 4421 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:21:24,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:21:24,005 INFO L93 Difference]: Finished difference Result 6072 states and 9014 transitions. [2022-11-21 17:21:24,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 17:21:24,005 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-11-21 17:21:24,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:21:24,026 INFO L225 Difference]: With dead ends: 6072 [2022-11-21 17:21:24,026 INFO L226 Difference]: Without dead ends: 6070 [2022-11-21 17:21:24,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-21 17:21:24,032 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 184 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 17:21:24,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 571 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 17:21:24,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6070 states. [2022-11-21 17:21:24,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6070 to 3142. [2022-11-21 17:21:24,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3142 states, 3141 states have (on average 1.4686405603311048) internal successors, (4613), 3141 states have internal predecessors, (4613), 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) [2022-11-21 17:21:24,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3142 states to 3142 states and 4613 transitions. [2022-11-21 17:21:24,649 INFO L78 Accepts]: Start accepts. Automaton has 3142 states and 4613 transitions. Word has length 43 [2022-11-21 17:21:24,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:21:24,650 INFO L495 AbstractCegarLoop]: Abstraction has 3142 states and 4613 transitions. [2022-11-21 17:21:24,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:21:24,650 INFO L276 IsEmpty]: Start isEmpty. Operand 3142 states and 4613 transitions. [2022-11-21 17:21:24,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-21 17:21:24,651 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:21:24,651 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:21:24,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-21 17:21:24,651 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:21:24,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:21:24,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1913665939, now seen corresponding path program 1 times [2022-11-21 17:21:24,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:21:24,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458891575] [2022-11-21 17:21:24,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:21:24,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:21:24,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:21:24,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:21:24,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:21:24,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458891575] [2022-11-21 17:21:24,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458891575] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:21:24,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:21:24,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:21:24,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916817665] [2022-11-21 17:21:24,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:21:24,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 17:21:24,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:21:24,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 17:21:24,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:21:24,708 INFO L87 Difference]: Start difference. First operand 3142 states and 4613 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2022-11-21 17:21:25,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:21:25,466 INFO L93 Difference]: Finished difference Result 7604 states and 11171 transitions. [2022-11-21 17:21:25,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:21:25,466 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 44 [2022-11-21 17:21:25,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:21:25,483 INFO L225 Difference]: With dead ends: 7604 [2022-11-21 17:21:25,483 INFO L226 Difference]: Without dead ends: 4482 [2022-11-21 17:21:25,487 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 [2022-11-21 17:21:25,488 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 66 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 17:21:25,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 236 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 17:21:25,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4482 states. [2022-11-21 17:21:26,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4482 to 4480. [2022-11-21 17:21:26,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4480 states, 4479 states have (on average 1.4594775619557938) internal successors, (6537), 4479 states have internal predecessors, (6537), 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) [2022-11-21 17:21:26,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4480 states to 4480 states and 6537 transitions. [2022-11-21 17:21:26,224 INFO L78 Accepts]: Start accepts. Automaton has 4480 states and 6537 transitions. Word has length 44 [2022-11-21 17:21:26,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:21:26,225 INFO L495 AbstractCegarLoop]: Abstraction has 4480 states and 6537 transitions. [2022-11-21 17:21:26,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2022-11-21 17:21:26,225 INFO L276 IsEmpty]: Start isEmpty. Operand 4480 states and 6537 transitions. [2022-11-21 17:21:26,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-21 17:21:26,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:21:26,228 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:21:26,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-21 17:21:26,228 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:21:26,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:21:26,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1827424966, now seen corresponding path program 1 times [2022-11-21 17:21:26,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:21:26,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289836467] [2022-11-21 17:21:26,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:21:26,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:21:26,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:21:26,542 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:21:26,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:21:26,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289836467] [2022-11-21 17:21:26,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289836467] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:21:26,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869145310] [2022-11-21 17:21:26,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:21:26,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:21:26,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571f5c15-3034-456c-bba1-09ea129537f5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:21:26,549 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571f5c15-3034-456c-bba1-09ea129537f5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:21:26,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571f5c15-3034-456c-bba1-09ea129537f5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 17:21:26,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:21:26,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-21 17:21:26,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:21:26,913 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 17:21:26,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:21:27,289 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 17:21:27,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869145310] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:21:27,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:21:27,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 5] total 17 [2022-11-21 17:21:27,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991890650] [2022-11-21 17:21:27,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:21:27,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-21 17:21:27,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:21:27,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-21 17:21:27,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-21 17:21:27,292 INFO L87 Difference]: Start difference. First operand 4480 states and 6537 transitions. Second operand has 17 states, 17 states have (on average 10.058823529411764) internal successors, (171), 17 states have internal predecessors, (171), 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) [2022-11-21 17:21:40,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:21:40,326 INFO L93 Difference]: Finished difference Result 40883 states and 58845 transitions. [2022-11-21 17:21:40,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-11-21 17:21:40,327 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 10.058823529411764) internal successors, (171), 17 states have internal predecessors, (171), 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 61 [2022-11-21 17:21:40,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:21:40,429 INFO L225 Difference]: With dead ends: 40883 [2022-11-21 17:21:40,429 INFO L226 Difference]: Without dead ends: 36909 [2022-11-21 17:21:40,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9583 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3530, Invalid=18820, Unknown=0, NotChecked=0, Total=22350 [2022-11-21 17:21:40,453 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 8242 mSDsluCounter, 2339 mSDsCounter, 0 mSdLazyCounter, 3111 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8242 SdHoareTripleChecker+Valid, 2656 SdHoareTripleChecker+Invalid, 3174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 3111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-21 17:21:40,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8242 Valid, 2656 Invalid, 3174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 3111 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-21 17:21:40,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36909 states. [2022-11-21 17:21:42,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36909 to 15628. [2022-11-21 17:21:42,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15628 states, 15627 states have (on average 1.4402636462532796) internal successors, (22507), 15627 states have internal predecessors, (22507), 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) [2022-11-21 17:21:42,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15628 states to 15628 states and 22507 transitions. [2022-11-21 17:21:42,925 INFO L78 Accepts]: Start accepts. Automaton has 15628 states and 22507 transitions. Word has length 61 [2022-11-21 17:21:42,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:21:42,925 INFO L495 AbstractCegarLoop]: Abstraction has 15628 states and 22507 transitions. [2022-11-21 17:21:42,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 10.058823529411764) internal successors, (171), 17 states have internal predecessors, (171), 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) [2022-11-21 17:21:42,926 INFO L276 IsEmpty]: Start isEmpty. Operand 15628 states and 22507 transitions. [2022-11-21 17:21:42,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-21 17:21:42,929 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:21:42,929 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:21:42,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571f5c15-3034-456c-bba1-09ea129537f5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 17:21:43,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571f5c15-3034-456c-bba1-09ea129537f5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:21:43,144 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:21:43,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:21:43,145 INFO L85 PathProgramCache]: Analyzing trace with hash 621000165, now seen corresponding path program 1 times [2022-11-21 17:21:43,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:21:43,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205487383] [2022-11-21 17:21:43,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:21:43,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:21:43,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:21:43,196 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:21:43,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:21:43,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205487383] [2022-11-21 17:21:43,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205487383] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:21:43,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:21:43,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:21:43,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987061233] [2022-11-21 17:21:43,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:21:43,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 17:21:43,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:21:43,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 17:21:43,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:21:43,199 INFO L87 Difference]: Start difference. First operand 15628 states and 22507 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2022-11-21 17:21:46,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:21:46,300 INFO L93 Difference]: Finished difference Result 25124 states and 35975 transitions. [2022-11-21 17:21:46,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:21:46,301 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 62 [2022-11-21 17:21:46,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:21:46,338 INFO L225 Difference]: With dead ends: 25124 [2022-11-21 17:21:46,338 INFO L226 Difference]: Without dead ends: 16161 [2022-11-21 17:21:46,349 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 [2022-11-21 17:21:46,350 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 67 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 17:21:46,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 265 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 17:21:46,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16161 states. [2022-11-21 17:21:48,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16161 to 15717. [2022-11-21 17:21:48,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15717 states, 15716 states have (on average 1.4122550267243574) internal successors, (22195), 15716 states have internal predecessors, (22195), 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) [2022-11-21 17:21:48,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15717 states to 15717 states and 22195 transitions. [2022-11-21 17:21:48,510 INFO L78 Accepts]: Start accepts. Automaton has 15717 states and 22195 transitions. Word has length 62 [2022-11-21 17:21:48,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:21:48,511 INFO L495 AbstractCegarLoop]: Abstraction has 15717 states and 22195 transitions. [2022-11-21 17:21:48,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2022-11-21 17:21:48,511 INFO L276 IsEmpty]: Start isEmpty. Operand 15717 states and 22195 transitions. [2022-11-21 17:21:48,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-21 17:21:48,514 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:21:48,514 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:21:48,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-21 17:21:48,514 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:21:48,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:21:48,515 INFO L85 PathProgramCache]: Analyzing trace with hash 2941002, now seen corresponding path program 1 times [2022-11-21 17:21:48,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:21:48,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958208278] [2022-11-21 17:21:48,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:21:48,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:21:48,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:21:48,575 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:21:48,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:21:48,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958208278] [2022-11-21 17:21:48,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958208278] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:21:48,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:21:48,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:21:48,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493489674] [2022-11-21 17:21:48,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:21:48,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 17:21:48,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:21:48,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 17:21:48,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:21:48,577 INFO L87 Difference]: Start difference. First operand 15717 states and 22195 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2022-11-21 17:21:53,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:21:53,098 INFO L93 Difference]: Finished difference Result 39144 states and 54917 transitions. [2022-11-21 17:21:53,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:21:53,099 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 62 [2022-11-21 17:21:53,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:21:53,148 INFO L225 Difference]: With dead ends: 39144 [2022-11-21 17:21:53,148 INFO L226 Difference]: Without dead ends: 26345 [2022-11-21 17:21:53,164 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 [2022-11-21 17:21:53,164 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 63 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 17:21:53,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 222 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 17:21:53,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26345 states. [2022-11-21 17:21:57,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26345 to 26294. [2022-11-21 17:21:57,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26294 states, 26293 states have (on average 1.3832198684060397) internal successors, (36369), 26293 states have internal predecessors, (36369), 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) [2022-11-21 17:21:57,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26294 states to 26294 states and 36369 transitions. [2022-11-21 17:21:57,430 INFO L78 Accepts]: Start accepts. Automaton has 26294 states and 36369 transitions. Word has length 62 [2022-11-21 17:21:57,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:21:57,431 INFO L495 AbstractCegarLoop]: Abstraction has 26294 states and 36369 transitions. [2022-11-21 17:21:57,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2022-11-21 17:21:57,431 INFO L276 IsEmpty]: Start isEmpty. Operand 26294 states and 36369 transitions. [2022-11-21 17:21:57,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-21 17:21:57,436 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:21:57,437 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:21:57,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-21 17:21:57,437 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:21:57,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:21:57,438 INFO L85 PathProgramCache]: Analyzing trace with hash 954450183, now seen corresponding path program 1 times [2022-11-21 17:21:57,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:21:57,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491840071] [2022-11-21 17:21:57,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:21:57,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:21:57,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:21:57,492 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:21:57,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:21:57,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491840071] [2022-11-21 17:21:57,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491840071] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:21:57,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:21:57,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:21:57,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040336090] [2022-11-21 17:21:57,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:21:57,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 17:21:57,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:21:57,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 17:21:57,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:21:57,495 INFO L87 Difference]: Start difference. First operand 26294 states and 36369 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2022-11-21 17:22:02,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:22:02,357 INFO L93 Difference]: Finished difference Result 53591 states and 73937 transitions. [2022-11-21 17:22:02,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:22:02,358 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 62 [2022-11-21 17:22:02,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:22:02,527 INFO L225 Difference]: With dead ends: 53591 [2022-11-21 17:22:02,527 INFO L226 Difference]: Without dead ends: 29492 [2022-11-21 17:22:02,551 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 [2022-11-21 17:22:02,551 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 64 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 17:22:02,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 266 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 17:22:02,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29492 states. [2022-11-21 17:22:06,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29492 to 26067. [2022-11-21 17:22:06,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26067 states, 26066 states have (on average 1.364881454768664) internal successors, (35577), 26066 states have internal predecessors, (35577), 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) [2022-11-21 17:22:06,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26067 states to 26067 states and 35577 transitions. [2022-11-21 17:22:06,665 INFO L78 Accepts]: Start accepts. Automaton has 26067 states and 35577 transitions. Word has length 62 [2022-11-21 17:22:06,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:22:06,666 INFO L495 AbstractCegarLoop]: Abstraction has 26067 states and 35577 transitions. [2022-11-21 17:22:06,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2022-11-21 17:22:06,668 INFO L276 IsEmpty]: Start isEmpty. Operand 26067 states and 35577 transitions. [2022-11-21 17:22:06,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-21 17:22:06,674 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:22:06,674 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:22:06,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-21 17:22:06,675 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:22:06,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:22:06,675 INFO L85 PathProgramCache]: Analyzing trace with hash -922232594, now seen corresponding path program 1 times [2022-11-21 17:22:06,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:22:06,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036549853] [2022-11-21 17:22:06,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:22:06,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:22:06,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:22:06,788 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 17:22:06,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:22:06,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036549853] [2022-11-21 17:22:06,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036549853] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:22:06,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:22:06,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 17:22:06,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707145804] [2022-11-21 17:22:06,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:22:06,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 17:22:06,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:22:06,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 17:22:06,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-21 17:22:06,791 INFO L87 Difference]: Start difference. First operand 26067 states and 35577 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 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)