./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8a0d22b-df5d-4e67-8e1e-8a6425803fb2/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8a0d22b-df5d-4e67-8e1e-8a6425803fb2/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8a0d22b-df5d-4e67-8e1e-8a6425803fb2/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8a0d22b-df5d-4e67-8e1e-8a6425803fb2/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label02.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8a0d22b-df5d-4e67-8e1e-8a6425803fb2/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8a0d22b-df5d-4e67-8e1e-8a6425803fb2/bin/uautomizer-Dbtcem3rbc --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 940f009ebef4e6f688860c69fe317a06471b0d96e24220f1e9007ff15bc7124f --- 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-5e519f3 [2022-11-02 21:08:10,759 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 21:08:10,761 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 21:08:10,803 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 21:08:10,804 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 21:08:10,808 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 21:08:10,813 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 21:08:10,817 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 21:08:10,819 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 21:08:10,823 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 21:08:10,824 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 21:08:10,826 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 21:08:10,828 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 21:08:10,834 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 21:08:10,836 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 21:08:10,838 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 21:08:10,840 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 21:08:10,842 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 21:08:10,843 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 21:08:10,846 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 21:08:10,850 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 21:08:10,851 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 21:08:10,852 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 21:08:10,855 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 21:08:10,860 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 21:08:10,863 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 21:08:10,864 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 21:08:10,864 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 21:08:10,866 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 21:08:10,867 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 21:08:10,868 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 21:08:10,869 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 21:08:10,871 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 21:08:10,873 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 21:08:10,876 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 21:08:10,876 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 21:08:10,877 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 21:08:10,877 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 21:08:10,877 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 21:08:10,878 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 21:08:10,878 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 21:08:10,879 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8a0d22b-df5d-4e67-8e1e-8a6425803fb2/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 21:08:10,935 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 21:08:10,935 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 21:08:10,936 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 21:08:10,936 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 21:08:10,937 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 21:08:10,937 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 21:08:10,938 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 21:08:10,938 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 21:08:10,938 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 21:08:10,939 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 21:08:10,940 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 21:08:10,940 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 21:08:10,940 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 21:08:10,940 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 21:08:10,941 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 21:08:10,941 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 21:08:10,941 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 21:08:10,941 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 21:08:10,941 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 21:08:10,942 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 21:08:10,942 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 21:08:10,942 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 21:08:10,942 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 21:08:10,943 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 21:08:10,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:08:10,943 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 21:08:10,943 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 21:08:10,943 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 21:08:10,944 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 21:08:10,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 21:08:10,944 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 21:08:10,944 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 21:08:10,945 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 21:08:10,945 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_a8a0d22b-df5d-4e67-8e1e-8a6425803fb2/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8a0d22b-df5d-4e67-8e1e-8a6425803fb2/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 940f009ebef4e6f688860c69fe317a06471b0d96e24220f1e9007ff15bc7124f [2022-11-02 21:08:11,229 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 21:08:11,258 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 21:08:11,261 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 21:08:11,262 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 21:08:11,264 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 21:08:11,265 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8a0d22b-df5d-4e67-8e1e-8a6425803fb2/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/eca-rers2012/Problem03_label02.c [2022-11-02 21:08:11,337 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8a0d22b-df5d-4e67-8e1e-8a6425803fb2/bin/uautomizer-Dbtcem3rbc/data/f7aa5c501/9242f298e49045469e4b493690a88bcd/FLAG243de9269 [2022-11-02 21:08:12,020 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 21:08:12,021 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8a0d22b-df5d-4e67-8e1e-8a6425803fb2/sv-benchmarks/c/eca-rers2012/Problem03_label02.c [2022-11-02 21:08:12,041 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8a0d22b-df5d-4e67-8e1e-8a6425803fb2/bin/uautomizer-Dbtcem3rbc/data/f7aa5c501/9242f298e49045469e4b493690a88bcd/FLAG243de9269 [2022-11-02 21:08:12,176 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8a0d22b-df5d-4e67-8e1e-8a6425803fb2/bin/uautomizer-Dbtcem3rbc/data/f7aa5c501/9242f298e49045469e4b493690a88bcd [2022-11-02 21:08:12,180 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 21:08:12,183 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 21:08:12,185 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 21:08:12,185 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 21:08:12,188 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 21:08:12,189 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:08:12" (1/1) ... [2022-11-02 21:08:12,191 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35560dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:12, skipping insertion in model container [2022-11-02 21:08:12,192 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:08:12" (1/1) ... [2022-11-02 21:08:12,199 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 21:08:12,279 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 21:08:12,946 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8a0d22b-df5d-4e67-8e1e-8a6425803fb2/sv-benchmarks/c/eca-rers2012/Problem03_label02.c[61770,61783] [2022-11-02 21:08:12,980 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:08:12,998 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 21:08:13,243 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8a0d22b-df5d-4e67-8e1e-8a6425803fb2/sv-benchmarks/c/eca-rers2012/Problem03_label02.c[61770,61783] [2022-11-02 21:08:13,250 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:08:13,271 INFO L208 MainTranslator]: Completed translation [2022-11-02 21:08:13,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:13 WrapperNode [2022-11-02 21:08:13,272 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 21:08:13,273 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 21:08:13,273 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 21:08:13,274 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 21:08:13,282 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:13" (1/1) ... [2022-11-02 21:08:13,320 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:13" (1/1) ... [2022-11-02 21:08:13,441 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-11-02 21:08:13,441 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 21:08:13,442 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 21:08:13,443 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 21:08:13,443 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 21:08:13,454 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:13" (1/1) ... [2022-11-02 21:08:13,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:13" (1/1) ... [2022-11-02 21:08:13,494 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:13" (1/1) ... [2022-11-02 21:08:13,495 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:13" (1/1) ... [2022-11-02 21:08:13,571 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:13" (1/1) ... [2022-11-02 21:08:13,600 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:13" (1/1) ... [2022-11-02 21:08:13,622 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:13" (1/1) ... [2022-11-02 21:08:13,632 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:13" (1/1) ... [2022-11-02 21:08:13,652 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 21:08:13,653 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 21:08:13,653 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 21:08:13,653 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 21:08:13,655 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:13" (1/1) ... [2022-11-02 21:08:13,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:08:13,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8a0d22b-df5d-4e67-8e1e-8a6425803fb2/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:08:13,709 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8a0d22b-df5d-4e67-8e1e-8a6425803fb2/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 21:08:13,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8a0d22b-df5d-4e67-8e1e-8a6425803fb2/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 21:08:13,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 21:08:13,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 21:08:13,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 21:08:13,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 21:08:13,863 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 21:08:13,866 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 21:08:16,046 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 21:08:16,066 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 21:08:16,066 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-02 21:08:16,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:08:16 BoogieIcfgContainer [2022-11-02 21:08:16,070 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 21:08:16,073 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 21:08:16,073 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 21:08:16,077 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 21:08:16,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 09:08:12" (1/3) ... [2022-11-02 21:08:16,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fefdda5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:08:16, skipping insertion in model container [2022-11-02 21:08:16,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:13" (2/3) ... [2022-11-02 21:08:16,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fefdda5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:08:16, skipping insertion in model container [2022-11-02 21:08:16,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:08:16" (3/3) ... [2022-11-02 21:08:16,081 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label02.c [2022-11-02 21:08:16,101 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 21:08:16,101 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 21:08:16,194 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 21:08:16,206 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;@41fbf809, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 21:08:16,206 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 21:08:16,212 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 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) [2022-11-02 21:08:16,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-11-02 21:08:16,231 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:16,232 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:16,233 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:08:16,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:16,238 INFO L85 PathProgramCache]: Analyzing trace with hash -635106638, now seen corresponding path program 1 times [2022-11-02 21:08:16,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:16,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502122013] [2022-11-02 21:08:16,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:16,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:16,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:17,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:08:17,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:17,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502122013] [2022-11-02 21:08:17,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502122013] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:08:17,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:08:17,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 21:08:17,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234546983] [2022-11-02 21:08:17,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:08:17,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:08:17,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:17,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:08:17,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:08:17,375 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 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 68.0) internal successors, (204), 2 states have internal predecessors, (204), 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) [2022-11-02 21:08:18,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:08:18,735 INFO L93 Difference]: Finished difference Result 855 states and 1496 transitions. [2022-11-02 21:08:18,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:08:18,738 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 2 states have internal predecessors, (204), 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 204 [2022-11-02 21:08:18,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:08:18,760 INFO L225 Difference]: With dead ends: 855 [2022-11-02 21:08:18,768 INFO L226 Difference]: Without dead ends: 460 [2022-11-02 21:08:18,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:08:18,778 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 92 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-02 21:08:18,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 176 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-02 21:08:18,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-11-02 21:08:18,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 459. [2022-11-02 21:08:18,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 1.5502183406113537) internal successors, (710), 458 states have internal predecessors, (710), 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) [2022-11-02 21:08:18,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 710 transitions. [2022-11-02 21:08:18,883 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 710 transitions. Word has length 204 [2022-11-02 21:08:18,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:08:18,888 INFO L495 AbstractCegarLoop]: Abstraction has 459 states and 710 transitions. [2022-11-02 21:08:18,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 2 states have internal predecessors, (204), 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) [2022-11-02 21:08:18,889 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 710 transitions. [2022-11-02 21:08:18,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-11-02 21:08:18,901 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:18,901 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:18,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 21:08:18,903 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:08:18,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:18,903 INFO L85 PathProgramCache]: Analyzing trace with hash 237984642, now seen corresponding path program 1 times [2022-11-02 21:08:18,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:18,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891719847] [2022-11-02 21:08:18,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:18,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:19,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:19,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:08:19,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:19,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891719847] [2022-11-02 21:08:19,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891719847] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:08:19,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:08:19,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 21:08:19,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064008492] [2022-11-02 21:08:19,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:08:19,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:08:19,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:19,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:08:19,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:08:19,295 INFO L87 Difference]: Start difference. First operand 459 states and 710 transitions. Second operand has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 2 states have internal predecessors, (209), 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) [2022-11-02 21:08:20,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:08:20,463 INFO L93 Difference]: Finished difference Result 1340 states and 2081 transitions. [2022-11-02 21:08:20,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:08:20,464 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 2 states have internal predecessors, (209), 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 209 [2022-11-02 21:08:20,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:08:20,468 INFO L225 Difference]: With dead ends: 1340 [2022-11-02 21:08:20,468 INFO L226 Difference]: Without dead ends: 883 [2022-11-02 21:08:20,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:08:20,472 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 249 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:08:20,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 180 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-02 21:08:20,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2022-11-02 21:08:20,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 880. [2022-11-02 21:08:20,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 1.4675767918088738) internal successors, (1290), 879 states have internal predecessors, (1290), 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) [2022-11-02 21:08:20,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1290 transitions. [2022-11-02 21:08:20,505 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1290 transitions. Word has length 209 [2022-11-02 21:08:20,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:08:20,506 INFO L495 AbstractCegarLoop]: Abstraction has 880 states and 1290 transitions. [2022-11-02 21:08:20,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 2 states have internal predecessors, (209), 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) [2022-11-02 21:08:20,506 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1290 transitions. [2022-11-02 21:08:20,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-11-02 21:08:20,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:20,511 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:20,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 21:08:20,512 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:08:20,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:20,512 INFO L85 PathProgramCache]: Analyzing trace with hash 317780433, now seen corresponding path program 1 times [2022-11-02 21:08:20,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:20,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372576490] [2022-11-02 21:08:20,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:20,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:20,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:20,822 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:08:20,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:20,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372576490] [2022-11-02 21:08:20,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372576490] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:08:20,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:08:20,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 21:08:20,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562024950] [2022-11-02 21:08:20,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:08:20,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:08:20,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:20,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:08:20,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:08:20,835 INFO L87 Difference]: Start difference. First operand 880 states and 1290 transitions. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 2 states have internal predecessors, (212), 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) [2022-11-02 21:08:22,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:08:22,010 INFO L93 Difference]: Finished difference Result 2594 states and 3819 transitions. [2022-11-02 21:08:22,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:08:22,010 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 2 states have internal predecessors, (212), 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 212 [2022-11-02 21:08:22,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:08:22,017 INFO L225 Difference]: With dead ends: 2594 [2022-11-02 21:08:22,017 INFO L226 Difference]: Without dead ends: 1716 [2022-11-02 21:08:22,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:08:22,020 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:08:22,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 92 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-02 21:08:22,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2022-11-02 21:08:22,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1696. [2022-11-02 21:08:22,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1696 states, 1695 states have (on average 1.4377581120943952) internal successors, (2437), 1695 states have internal predecessors, (2437), 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) [2022-11-02 21:08:22,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1696 states to 1696 states and 2437 transitions. [2022-11-02 21:08:22,064 INFO L78 Accepts]: Start accepts. Automaton has 1696 states and 2437 transitions. Word has length 212 [2022-11-02 21:08:22,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:08:22,065 INFO L495 AbstractCegarLoop]: Abstraction has 1696 states and 2437 transitions. [2022-11-02 21:08:22,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 2 states have internal predecessors, (212), 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) [2022-11-02 21:08:22,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 2437 transitions. [2022-11-02 21:08:22,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-11-02 21:08:22,071 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:22,071 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:22,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 21:08:22,072 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:08:22,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:22,073 INFO L85 PathProgramCache]: Analyzing trace with hash -73934984, now seen corresponding path program 1 times [2022-11-02 21:08:22,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:22,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041065192] [2022-11-02 21:08:22,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:22,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:22,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:22,402 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 21:08:22,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:22,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041065192] [2022-11-02 21:08:22,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041065192] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:08:22,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:08:22,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 21:08:22,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905949309] [2022-11-02 21:08:22,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:08:22,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:08:22,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:22,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:08:22,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:08:22,405 INFO L87 Difference]: Start difference. First operand 1696 states and 2437 transitions. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 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) [2022-11-02 21:08:23,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:08:23,426 INFO L93 Difference]: Finished difference Result 5017 states and 7218 transitions. [2022-11-02 21:08:23,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:08:23,427 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 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 224 [2022-11-02 21:08:23,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:08:23,438 INFO L225 Difference]: With dead ends: 5017 [2022-11-02 21:08:23,438 INFO L226 Difference]: Without dead ends: 3323 [2022-11-02 21:08:23,441 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 [2022-11-02 21:08:23,442 INFO L413 NwaCegarLoop]: 383 mSDtfsCounter, 235 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 21:08:23,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 411 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-02 21:08:23,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3323 states. [2022-11-02 21:08:23,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3323 to 3320. [2022-11-02 21:08:23,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3320 states, 3319 states have (on average 1.2847243145525762) internal successors, (4264), 3319 states have internal predecessors, (4264), 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) [2022-11-02 21:08:23,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3320 states to 3320 states and 4264 transitions. [2022-11-02 21:08:23,513 INFO L78 Accepts]: Start accepts. Automaton has 3320 states and 4264 transitions. Word has length 224 [2022-11-02 21:08:23,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:08:23,514 INFO L495 AbstractCegarLoop]: Abstraction has 3320 states and 4264 transitions. [2022-11-02 21:08:23,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 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) [2022-11-02 21:08:23,514 INFO L276 IsEmpty]: Start isEmpty. Operand 3320 states and 4264 transitions. [2022-11-02 21:08:23,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-11-02 21:08:23,522 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:23,523 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:23,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 21:08:23,523 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:08:23,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:23,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1912274208, now seen corresponding path program 1 times [2022-11-02 21:08:23,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:23,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281090167] [2022-11-02 21:08:23,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:23,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:23,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:24,083 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 21:08:24,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:24,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281090167] [2022-11-02 21:08:24,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281090167] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:08:24,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:08:24,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 21:08:24,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505240794] [2022-11-02 21:08:24,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:08:24,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:08:24,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:24,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:08:24,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:08:24,088 INFO L87 Difference]: Start difference. First operand 3320 states and 4264 transitions. Second operand has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 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) [2022-11-02 21:08:25,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:08:25,163 INFO L93 Difference]: Finished difference Result 9900 states and 12717 transitions. [2022-11-02 21:08:25,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:08:25,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 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 239 [2022-11-02 21:08:25,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:08:25,184 INFO L225 Difference]: With dead ends: 9900 [2022-11-02 21:08:25,185 INFO L226 Difference]: Without dead ends: 6582 [2022-11-02 21:08:25,189 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 [2022-11-02 21:08:25,190 INFO L413 NwaCegarLoop]: 395 mSDtfsCounter, 202 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:08:25,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 418 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-02 21:08:25,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6582 states. [2022-11-02 21:08:25,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6582 to 6577. [2022-11-02 21:08:25,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6577 states, 6576 states have (on average 1.2244525547445255) internal successors, (8052), 6576 states have internal predecessors, (8052), 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) [2022-11-02 21:08:25,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6577 states to 6577 states and 8052 transitions. [2022-11-02 21:08:25,350 INFO L78 Accepts]: Start accepts. Automaton has 6577 states and 8052 transitions. Word has length 239 [2022-11-02 21:08:25,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:08:25,351 INFO L495 AbstractCegarLoop]: Abstraction has 6577 states and 8052 transitions. [2022-11-02 21:08:25,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 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) [2022-11-02 21:08:25,356 INFO L276 IsEmpty]: Start isEmpty. Operand 6577 states and 8052 transitions. [2022-11-02 21:08:25,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-11-02 21:08:25,371 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:25,371 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:25,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 21:08:25,374 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:08:25,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:25,375 INFO L85 PathProgramCache]: Analyzing trace with hash -177417023, now seen corresponding path program 1 times [2022-11-02 21:08:25,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:25,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893563600] [2022-11-02 21:08:25,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:25,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:25,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:26,116 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:08:26,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:26,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893563600] [2022-11-02 21:08:26,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893563600] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:08:26,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:08:26,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 21:08:26,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169199177] [2022-11-02 21:08:26,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:08:26,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:08:26,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:26,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:08:26,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:08:26,120 INFO L87 Difference]: Start difference. First operand 6577 states and 8052 transitions. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 2 states have internal predecessors, (245), 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) [2022-11-02 21:08:27,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:08:27,235 INFO L93 Difference]: Finished difference Result 16027 states and 19627 transitions. [2022-11-02 21:08:27,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:08:27,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 2 states have internal predecessors, (245), 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 245 [2022-11-02 21:08:27,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:08:27,267 INFO L225 Difference]: With dead ends: 16027 [2022-11-02 21:08:27,267 INFO L226 Difference]: Without dead ends: 9452 [2022-11-02 21:08:27,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:08:27,276 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 197 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:08:27,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 194 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-02 21:08:27,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9452 states. [2022-11-02 21:08:27,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9452 to 9439. [2022-11-02 21:08:27,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9439 states, 9438 states have (on average 1.2134986225895317) internal successors, (11453), 9438 states have internal predecessors, (11453), 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) [2022-11-02 21:08:27,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9439 states to 9439 states and 11453 transitions. [2022-11-02 21:08:27,514 INFO L78 Accepts]: Start accepts. Automaton has 9439 states and 11453 transitions. Word has length 245 [2022-11-02 21:08:27,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:08:27,514 INFO L495 AbstractCegarLoop]: Abstraction has 9439 states and 11453 transitions. [2022-11-02 21:08:27,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 2 states have internal predecessors, (245), 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) [2022-11-02 21:08:27,515 INFO L276 IsEmpty]: Start isEmpty. Operand 9439 states and 11453 transitions. [2022-11-02 21:08:27,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-11-02 21:08:27,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:27,532 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:27,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-02 21:08:27,533 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:08:27,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:27,534 INFO L85 PathProgramCache]: Analyzing trace with hash -285299978, now seen corresponding path program 1 times [2022-11-02 21:08:27,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:27,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142728369] [2022-11-02 21:08:27,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:27,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:27,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:28,208 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 47 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:08:28,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:28,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142728369] [2022-11-02 21:08:28,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142728369] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:08:28,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845015687] [2022-11-02 21:08:28,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:28,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:28,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8a0d22b-df5d-4e67-8e1e-8a6425803fb2/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:08:28,214 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8a0d22b-df5d-4e67-8e1e-8a6425803fb2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:08:28,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8a0d22b-df5d-4e67-8e1e-8a6425803fb2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 21:08:28,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:28,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 21:08:28,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:08:28,852 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 21:08:28,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:08:28,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845015687] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:08:28,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:08:28,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-02 21:08:28,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464994801] [2022-11-02 21:08:28,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:08:28,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:08:28,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:28,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:08:28,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:08:28,855 INFO L87 Difference]: Start difference. First operand 9439 states and 11453 transitions. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 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) [2022-11-02 21:08:29,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:08:29,839 INFO L93 Difference]: Finished difference Result 18879 states and 22909 transitions. [2022-11-02 21:08:29,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:08:29,840 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 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 252 [2022-11-02 21:08:29,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:08:29,886 INFO L225 Difference]: With dead ends: 18879 [2022-11-02 21:08:29,886 INFO L226 Difference]: Without dead ends: 9442 [2022-11-02 21:08:29,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:08:29,898 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 74 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 21:08:29,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 98 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-02 21:08:29,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9442 states. [2022-11-02 21:08:30,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9442 to 9439. [2022-11-02 21:08:30,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9439 states, 9438 states have (on average 1.205657978385251) internal successors, (11379), 9438 states have internal predecessors, (11379), 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) [2022-11-02 21:08:30,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9439 states to 9439 states and 11379 transitions. [2022-11-02 21:08:30,095 INFO L78 Accepts]: Start accepts. Automaton has 9439 states and 11379 transitions. Word has length 252 [2022-11-02 21:08:30,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:08:30,096 INFO L495 AbstractCegarLoop]: Abstraction has 9439 states and 11379 transitions. [2022-11-02 21:08:30,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 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) [2022-11-02 21:08:30,097 INFO L276 IsEmpty]: Start isEmpty. Operand 9439 states and 11379 transitions. [2022-11-02 21:08:30,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2022-11-02 21:08:30,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:30,117 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:30,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8a0d22b-df5d-4e67-8e1e-8a6425803fb2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 21:08:30,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8a0d22b-df5d-4e67-8e1e-8a6425803fb2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-02 21:08:30,327 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:08:30,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:30,327 INFO L85 PathProgramCache]: Analyzing trace with hash -2021713360, now seen corresponding path program 1 times [2022-11-02 21:08:30,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:30,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181896246] [2022-11-02 21:08:30,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:30,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:30,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:30,957 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-02 21:08:30,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:30,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181896246] [2022-11-02 21:08:30,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181896246] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:08:30,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:08:30,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 21:08:30,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803725599] [2022-11-02 21:08:30,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:08:30,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:08:30,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:30,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:08:30,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:08:30,961 INFO L87 Difference]: Start difference. First operand 9439 states and 11379 transitions. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 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) [2022-11-02 21:08:32,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:08:32,089 INFO L93 Difference]: Finished difference Result 22141 states and 26799 transitions. [2022-11-02 21:08:32,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:08:32,097 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 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 306 [2022-11-02 21:08:32,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:08:32,122 INFO L225 Difference]: With dead ends: 22141 [2022-11-02 21:08:32,123 INFO L226 Difference]: Without dead ends: 12704 [2022-11-02 21:08:32,134 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 [2022-11-02 21:08:32,136 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 214 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:08:32,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 413 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-02 21:08:32,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12704 states. [2022-11-02 21:08:32,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12704 to 11873. [2022-11-02 21:08:32,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11873 states, 11872 states have (on average 1.1861522911051212) internal successors, (14082), 11872 states have internal predecessors, (14082), 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) [2022-11-02 21:08:32,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11873 states to 11873 states and 14082 transitions. [2022-11-02 21:08:32,360 INFO L78 Accepts]: Start accepts. Automaton has 11873 states and 14082 transitions. Word has length 306 [2022-11-02 21:08:32,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:08:32,360 INFO L495 AbstractCegarLoop]: Abstraction has 11873 states and 14082 transitions. [2022-11-02 21:08:32,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 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) [2022-11-02 21:08:32,361 INFO L276 IsEmpty]: Start isEmpty. Operand 11873 states and 14082 transitions. [2022-11-02 21:08:32,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2022-11-02 21:08:32,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:32,385 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:32,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-02 21:08:32,385 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:08:32,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:32,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1904547740, now seen corresponding path program 1 times [2022-11-02 21:08:32,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:32,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704115856] [2022-11-02 21:08:32,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:32,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:32,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:33,199 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 94 proven. 6 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-02 21:08:33,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:33,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704115856] [2022-11-02 21:08:33,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704115856] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:08:33,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780016221] [2022-11-02 21:08:33,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:33,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:33,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8a0d22b-df5d-4e67-8e1e-8a6425803fb2/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:08:33,201 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8a0d22b-df5d-4e67-8e1e-8a6425803fb2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:08:33,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8a0d22b-df5d-4e67-8e1e-8a6425803fb2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 21:08:33,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:33,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 21:08:33,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:08:33,605 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 21:08:33,618 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:08:33,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780016221] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:08:33,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:08:33,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-02 21:08:33,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483229903] [2022-11-02 21:08:33,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:08:33,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:08:33,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:33,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:08:33,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:08:33,621 INFO L87 Difference]: Start difference. First operand 11873 states and 14082 transitions. Second operand has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 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) [2022-11-02 21:08:34,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:08:34,794 INFO L93 Difference]: Finished difference Result 28416 states and 34174 transitions. [2022-11-02 21:08:34,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:08:34,794 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 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 313 [2022-11-02 21:08:34,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:08:34,826 INFO L225 Difference]: With dead ends: 28416 [2022-11-02 21:08:34,827 INFO L226 Difference]: Without dead ends: 16748 [2022-11-02 21:08:34,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:08:34,839 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 186 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:08:34,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 166 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-02 21:08:34,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16748 states. [2022-11-02 21:08:35,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16748 to 16339. [2022-11-02 21:08:35,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16339 states, 16338 states have (on average 1.1618925205043458) internal successors, (18983), 16338 states have internal predecessors, (18983), 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) [2022-11-02 21:08:35,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16339 states to 16339 states and 18983 transitions. [2022-11-02 21:08:35,246 INFO L78 Accepts]: Start accepts. Automaton has 16339 states and 18983 transitions. Word has length 313 [2022-11-02 21:08:35,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:08:35,247 INFO L495 AbstractCegarLoop]: Abstraction has 16339 states and 18983 transitions. [2022-11-02 21:08:35,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 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) [2022-11-02 21:08:35,247 INFO L276 IsEmpty]: Start isEmpty. Operand 16339 states and 18983 transitions. [2022-11-02 21:08:35,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2022-11-02 21:08:35,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:35,279 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:35,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8a0d22b-df5d-4e67-8e1e-8a6425803fb2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 21:08:35,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8a0d22b-df5d-4e67-8e1e-8a6425803fb2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:35,507 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:08:35,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:35,507 INFO L85 PathProgramCache]: Analyzing trace with hash 450065035, now seen corresponding path program 1 times [2022-11-02 21:08:35,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:35,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060297357] [2022-11-02 21:08:35,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:35,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:35,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:36,128 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-02 21:08:36,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:36,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060297357] [2022-11-02 21:08:36,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060297357] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:08:36,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:08:36,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 21:08:36,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865398534] [2022-11-02 21:08:36,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:08:36,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:08:36,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:36,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:08:36,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:08:36,132 INFO L87 Difference]: Start difference. First operand 16339 states and 18983 transitions. Second operand has 4 states, 4 states have (on average 62.25) internal successors, (249), 3 states have internal predecessors, (249), 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) [2022-11-02 21:08:37,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:08:37,742 INFO L93 Difference]: Finished difference Result 32298 states and 37578 transitions. [2022-11-02 21:08:37,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 21:08:37,743 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 62.25) internal successors, (249), 3 states have internal predecessors, (249), 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 322 [2022-11-02 21:08:37,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:08:37,772 INFO L225 Difference]: With dead ends: 32298 [2022-11-02 21:08:37,773 INFO L226 Difference]: Without dead ends: 16164 [2022-11-02 21:08:37,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:08:37,787 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 407 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 1344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-02 21:08:37,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 173 Invalid, 1344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 1131 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-02 21:08:37,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16164 states. [2022-11-02 21:08:38,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16164 to 15119. [2022-11-02 21:08:38,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15119 states, 15118 states have (on average 1.1647704722846937) internal successors, (17609), 15118 states have internal predecessors, (17609), 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) [2022-11-02 21:08:38,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15119 states to 15119 states and 17609 transitions. [2022-11-02 21:08:38,101 INFO L78 Accepts]: Start accepts. Automaton has 15119 states and 17609 transitions. Word has length 322 [2022-11-02 21:08:38,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:08:38,102 INFO L495 AbstractCegarLoop]: Abstraction has 15119 states and 17609 transitions. [2022-11-02 21:08:38,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.25) internal successors, (249), 3 states have internal predecessors, (249), 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) [2022-11-02 21:08:38,102 INFO L276 IsEmpty]: Start isEmpty. Operand 15119 states and 17609 transitions. [2022-11-02 21:08:38,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2022-11-02 21:08:38,129 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:38,130 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:38,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-02 21:08:38,130 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:08:38,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:38,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1147355766, now seen corresponding path program 1 times [2022-11-02 21:08:38,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:38,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509100983] [2022-11-02 21:08:38,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:38,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:38,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:38,801 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 93 proven. 6 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-02 21:08:38,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:38,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509100983] [2022-11-02 21:08:38,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509100983] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:08:38,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092314047] [2022-11-02 21:08:38,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:38,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:38,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8a0d22b-df5d-4e67-8e1e-8a6425803fb2/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:08:38,804 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8a0d22b-df5d-4e67-8e1e-8a6425803fb2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:08:38,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8a0d22b-df5d-4e67-8e1e-8a6425803fb2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 21:08:39,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:39,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 21:08:39,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:08:39,261 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 180 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 21:08:39,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:08:39,398 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 180 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 21:08:39,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092314047] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:08:39,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:08:39,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 6 [2022-11-02 21:08:39,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956102786] [2022-11-02 21:08:39,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:08:39,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 21:08:39,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:39,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 21:08:39,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 21:08:39,401 INFO L87 Difference]: Start difference. First operand 15119 states and 17609 transitions. Second operand has 6 states, 6 states have (on average 60.833333333333336) internal successors, (365), 6 states have internal predecessors, (365), 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) [2022-11-02 21:08:44,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:08:44,652 INFO L93 Difference]: Finished difference Result 66146 states and 76828 transitions. [2022-11-02 21:08:44,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 21:08:44,653 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 60.833333333333336) internal successors, (365), 6 states have internal predecessors, (365), 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 329 [2022-11-02 21:08:44,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:08:44,721 INFO L225 Difference]: With dead ends: 66146 [2022-11-02 21:08:44,722 INFO L226 Difference]: Without dead ends: 51230 [2022-11-02 21:08:44,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 673 GetRequests, 662 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-11-02 21:08:44,800 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 2781 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 3966 mSolverCounterSat, 767 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2781 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 4733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 767 IncrementalHoareTripleChecker+Valid, 3966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-02 21:08:44,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2781 Valid, 423 Invalid, 4733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [767 Valid, 3966 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-11-02 21:08:44,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51230 states. [2022-11-02 21:08:45,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51230 to 50785. [2022-11-02 21:08:45,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50785 states, 50784 states have (on average 1.1255316635160681) internal successors, (57159), 50784 states have internal predecessors, (57159), 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) [2022-11-02 21:08:45,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50785 states to 50785 states and 57159 transitions. [2022-11-02 21:08:45,637 INFO L78 Accepts]: Start accepts. Automaton has 50785 states and 57159 transitions. Word has length 329 [2022-11-02 21:08:45,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:08:45,638 INFO L495 AbstractCegarLoop]: Abstraction has 50785 states and 57159 transitions. [2022-11-02 21:08:45,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 60.833333333333336) internal successors, (365), 6 states have internal predecessors, (365), 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) [2022-11-02 21:08:45,638 INFO L276 IsEmpty]: Start isEmpty. Operand 50785 states and 57159 transitions. [2022-11-02 21:08:45,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2022-11-02 21:08:45,706 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:45,706 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:45,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8a0d22b-df5d-4e67-8e1e-8a6425803fb2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 21:08:45,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8a0d22b-df5d-4e67-8e1e-8a6425803fb2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:45,935 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:08:45,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:45,936 INFO L85 PathProgramCache]: Analyzing trace with hash 898638909, now seen corresponding path program 1 times [2022-11-02 21:08:45,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:45,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988957248] [2022-11-02 21:08:45,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:45,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:46,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:46,724 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:08:46,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:46,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988957248] [2022-11-02 21:08:46,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988957248] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:08:46,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:08:46,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 21:08:46,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47252130] [2022-11-02 21:08:46,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:08:46,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:08:46,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:46,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:08:46,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:08:46,727 INFO L87 Difference]: Start difference. First operand 50785 states and 57159 transitions. Second operand has 3 states, 3 states have (on average 110.0) internal successors, (330), 2 states have internal predecessors, (330), 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) [2022-11-02 21:08:48,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:08:48,165 INFO L93 Difference]: Finished difference Result 117863 states and 132841 transitions. [2022-11-02 21:08:48,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:08:48,165 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 2 states have internal predecessors, (330), 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 330 [2022-11-02 21:08:48,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:08:48,266 INFO L225 Difference]: With dead ends: 117863 [2022-11-02 21:08:48,266 INFO L226 Difference]: Without dead ends: 67283 [2022-11-02 21:08:48,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:08:48,301 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 101 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:08:48,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 187 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-02 21:08:48,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67283 states. [2022-11-02 21:08:49,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67283 to 67278. [2022-11-02 21:08:49,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67278 states, 67277 states have (on average 1.124604248108566) internal successors, (75660), 67277 states have internal predecessors, (75660), 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) [2022-11-02 21:08:49,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67278 states to 67278 states and 75660 transitions. [2022-11-02 21:08:49,829 INFO L78 Accepts]: Start accepts. Automaton has 67278 states and 75660 transitions. Word has length 330 [2022-11-02 21:08:49,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:08:49,829 INFO L495 AbstractCegarLoop]: Abstraction has 67278 states and 75660 transitions. [2022-11-02 21:08:49,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 2 states have internal predecessors, (330), 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) [2022-11-02 21:08:49,830 INFO L276 IsEmpty]: Start isEmpty. Operand 67278 states and 75660 transitions. [2022-11-02 21:08:49,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2022-11-02 21:08:49,886 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:49,887 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:49,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-02 21:08:49,887 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:08:49,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:49,888 INFO L85 PathProgramCache]: Analyzing trace with hash -793585368, now seen corresponding path program 1 times [2022-11-02 21:08:49,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:49,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30046640] [2022-11-02 21:08:49,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:49,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:50,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:50,739 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:08:50,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:50,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30046640] [2022-11-02 21:08:50,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30046640] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:08:50,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:08:50,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 21:08:50,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925334348] [2022-11-02 21:08:50,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:08:50,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:08:50,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:50,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:08:50,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:08:50,746 INFO L87 Difference]: Start difference. First operand 67278 states and 75660 transitions. Second operand has 4 states, 4 states have (on average 84.25) internal successors, (337), 3 states have internal predecessors, (337), 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) [2022-11-02 21:08:52,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:08:52,319 INFO L93 Difference]: Finished difference Result 135366 states and 152171 transitions. [2022-11-02 21:08:52,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 21:08:52,319 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 84.25) internal successors, (337), 3 states have internal predecessors, (337), 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 337 [2022-11-02 21:08:52,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:08:52,389 INFO L225 Difference]: With dead ends: 135366 [2022-11-02 21:08:52,389 INFO L226 Difference]: Without dead ends: 68293 [2022-11-02 21:08:52,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:08:52,425 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 504 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:08:52,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [504 Valid, 204 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-02 21:08:52,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68293 states. [2022-11-02 21:08:53,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68293 to 67278. [2022-11-02 21:08:53,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67278 states, 67277 states have (on average 1.1185546323409188) internal successors, (75253), 67277 states have internal predecessors, (75253), 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) [2022-11-02 21:08:53,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67278 states to 67278 states and 75253 transitions. [2022-11-02 21:08:53,534 INFO L78 Accepts]: Start accepts. Automaton has 67278 states and 75253 transitions. Word has length 337 [2022-11-02 21:08:53,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:08:53,534 INFO L495 AbstractCegarLoop]: Abstraction has 67278 states and 75253 transitions. [2022-11-02 21:08:53,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 84.25) internal successors, (337), 3 states have internal predecessors, (337), 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) [2022-11-02 21:08:53,535 INFO L276 IsEmpty]: Start isEmpty. Operand 67278 states and 75253 transitions. [2022-11-02 21:08:53,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2022-11-02 21:08:53,923 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:53,923 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:53,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-02 21:08:53,924 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:08:53,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:53,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1387466489, now seen corresponding path program 1 times [2022-11-02 21:08:53,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:53,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101853633] [2022-11-02 21:08:53,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:53,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:54,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:54,651 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 21:08:54,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:54,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101853633] [2022-11-02 21:08:54,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101853633] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:08:54,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:08:54,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 21:08:54,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945235263] [2022-11-02 21:08:54,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:08:54,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:08:54,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:54,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:08:54,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:08:54,655 INFO L87 Difference]: Start difference. First operand 67278 states and 75253 transitions. Second operand has 4 states, 4 states have (on average 85.0) internal successors, (340), 3 states have internal predecessors, (340), 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) [2022-11-02 21:08:55,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:08:55,952 INFO L93 Difference]: Finished difference Result 127141 states and 142333 transitions. [2022-11-02 21:08:55,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 21:08:55,953 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 85.0) internal successors, (340), 3 states have internal predecessors, (340), 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 345 [2022-11-02 21:08:55,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:08:56,011 INFO L225 Difference]: With dead ends: 127141 [2022-11-02 21:08:56,011 INFO L226 Difference]: Without dead ends: 55196 [2022-11-02 21:08:56,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:08:56,035 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 672 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 672 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 21:08:56,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [672 Valid, 46 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-02 21:08:56,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55196 states. [2022-11-02 21:08:56,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55196 to 40547. [2022-11-02 21:08:56,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40547 states, 40546 states have (on average 1.0770976175208404) internal successors, (43672), 40546 states have internal predecessors, (43672), 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) [2022-11-02 21:08:56,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40547 states to 40547 states and 43672 transitions. [2022-11-02 21:08:56,816 INFO L78 Accepts]: Start accepts. Automaton has 40547 states and 43672 transitions. Word has length 345 [2022-11-02 21:08:56,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:08:56,816 INFO L495 AbstractCegarLoop]: Abstraction has 40547 states and 43672 transitions. [2022-11-02 21:08:56,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 85.0) internal successors, (340), 3 states have internal predecessors, (340), 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) [2022-11-02 21:08:56,816 INFO L276 IsEmpty]: Start isEmpty. Operand 40547 states and 43672 transitions. [2022-11-02 21:08:56,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2022-11-02 21:08:56,841 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:56,842 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:56,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-02 21:08:56,842 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:08:56,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:56,843 INFO L85 PathProgramCache]: Analyzing trace with hash -2135097864, now seen corresponding path program 1 times [2022-11-02 21:08:56,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:56,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753705732] [2022-11-02 21:08:56,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:56,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:56,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:57,645 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2022-11-02 21:08:57,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:57,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753705732] [2022-11-02 21:08:57,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753705732] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:08:57,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:08:57,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 21:08:57,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105673640] [2022-11-02 21:08:57,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:08:57,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:08:57,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:57,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:08:57,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:08:57,648 INFO L87 Difference]: Start difference. First operand 40547 states and 43672 transitions. Second operand has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 2 states have internal predecessors, (287), 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) [2022-11-02 21:08:58,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:08:58,515 INFO L93 Difference]: Finished difference Result 91484 states and 98883 transitions. [2022-11-02 21:08:58,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:08:58,515 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 2 states have internal predecessors, (287), 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 422 [2022-11-02 21:08:58,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:08:58,568 INFO L225 Difference]: With dead ends: 91484 [2022-11-02 21:08:58,568 INFO L226 Difference]: Without dead ends: 51142 [2022-11-02 21:08:58,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:08:58,588 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 157 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 21:08:58,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 96 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 21:08:58,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51142 states. [2022-11-02 21:08:59,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51142 to 48679. [2022-11-02 21:08:59,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48679 states, 48678 states have (on average 1.0851103167755454) internal successors, (52821), 48678 states have internal predecessors, (52821), 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) [2022-11-02 21:08:59,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48679 states to 48679 states and 52821 transitions. [2022-11-02 21:08:59,454 INFO L78 Accepts]: Start accepts. Automaton has 48679 states and 52821 transitions. Word has length 422 [2022-11-02 21:08:59,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:08:59,454 INFO L495 AbstractCegarLoop]: Abstraction has 48679 states and 52821 transitions. [2022-11-02 21:08:59,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 2 states have internal predecessors, (287), 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) [2022-11-02 21:08:59,454 INFO L276 IsEmpty]: Start isEmpty. Operand 48679 states and 52821 transitions. [2022-11-02 21:08:59,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2022-11-02 21:08:59,477 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:59,477 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:59,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-02 21:08:59,478 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:08:59,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:59,479 INFO L85 PathProgramCache]: Analyzing trace with hash 107816933, now seen corresponding path program 1 times [2022-11-02 21:08:59,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:59,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998775189] [2022-11-02 21:08:59,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:59,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:59,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:00,209 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2022-11-02 21:09:00,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:09:00,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998775189] [2022-11-02 21:09:00,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998775189] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:09:00,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:09:00,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 21:09:00,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640010453] [2022-11-02 21:09:00,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:09:00,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:09:00,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:09:00,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:09:00,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:09:00,213 INFO L87 Difference]: Start difference. First operand 48679 states and 52821 transitions. Second operand has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 2 states have internal predecessors, (236), 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) [2022-11-02 21:09:01,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:09:01,380 INFO L93 Difference]: Finished difference Result 112627 states and 122251 transitions. [2022-11-02 21:09:01,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:09:01,381 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 2 states have internal predecessors, (236), 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 436 [2022-11-02 21:09:01,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:09:01,452 INFO L225 Difference]: With dead ends: 112627 [2022-11-02 21:09:01,452 INFO L226 Difference]: Without dead ends: 64153 [2022-11-02 21:09:01,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:09:01,477 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 203 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 21:09:01,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 110 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 21:09:01,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64153 states. [2022-11-02 21:09:02,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64153 to 63125. [2022-11-02 21:09:02,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63125 states, 63124 states have (on average 1.082789430327609) internal successors, (68350), 63124 states have internal predecessors, (68350), 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) [2022-11-02 21:09:02,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63125 states to 63125 states and 68350 transitions. [2022-11-02 21:09:02,659 INFO L78 Accepts]: Start accepts. Automaton has 63125 states and 68350 transitions. Word has length 436 [2022-11-02 21:09:02,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:09:02,660 INFO L495 AbstractCegarLoop]: Abstraction has 63125 states and 68350 transitions. [2022-11-02 21:09:02,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 2 states have internal predecessors, (236), 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) [2022-11-02 21:09:02,660 INFO L276 IsEmpty]: Start isEmpty. Operand 63125 states and 68350 transitions. [2022-11-02 21:09:02,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2022-11-02 21:09:02,690 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:09:02,691 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:09:02,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-02 21:09:02,691 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:09:02,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:02,692 INFO L85 PathProgramCache]: Analyzing trace with hash -364376088, now seen corresponding path program 1 times [2022-11-02 21:09:02,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:09:02,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375415526] [2022-11-02 21:09:02,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:02,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:09:02,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:03,155 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 218 proven. 0 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-11-02 21:09:03,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:09:03,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375415526] [2022-11-02 21:09:03,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375415526] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:09:03,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:09:03,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 21:09:03,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221209456] [2022-11-02 21:09:03,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:09:03,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:09:03,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:09:03,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:09:03,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:09:03,161 INFO L87 Difference]: Start difference. First operand 63125 states and 68350 transitions. Second operand has 4 states, 4 states have (on average 77.75) internal successors, (311), 3 states have internal predecessors, (311), 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) [2022-11-02 21:09:04,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:09:04,716 INFO L93 Difference]: Finished difference Result 129324 states and 140309 transitions. [2022-11-02 21:09:04,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 21:09:04,717 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 77.75) internal successors, (311), 3 states have internal predecessors, (311), 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 443 [2022-11-02 21:09:04,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:09:04,783 INFO L225 Difference]: With dead ends: 129324 [2022-11-02 21:09:04,783 INFO L226 Difference]: Without dead ends: 65389 [2022-11-02 21:09:04,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:09:04,811 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 347 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:09:04,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 80 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 970 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-02 21:09:04,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65389 states. [2022-11-02 21:09:05,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65389 to 63126. [2022-11-02 21:09:05,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63126 states, 63125 states have (on average 1.0809346534653466) internal successors, (68234), 63125 states have internal predecessors, (68234), 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) [2022-11-02 21:09:05,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63126 states to 63126 states and 68234 transitions. [2022-11-02 21:09:05,973 INFO L78 Accepts]: Start accepts. Automaton has 63126 states and 68234 transitions. Word has length 443 [2022-11-02 21:09:05,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:09:05,974 INFO L495 AbstractCegarLoop]: Abstraction has 63126 states and 68234 transitions. [2022-11-02 21:09:05,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.75) internal successors, (311), 3 states have internal predecessors, (311), 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) [2022-11-02 21:09:05,974 INFO L276 IsEmpty]: Start isEmpty. Operand 63126 states and 68234 transitions. [2022-11-02 21:09:06,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2022-11-02 21:09:06,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:09:06,019 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:09:06,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-02 21:09:06,019 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:09:06,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:06,020 INFO L85 PathProgramCache]: Analyzing trace with hash 293678199, now seen corresponding path program 1 times [2022-11-02 21:09:06,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:09:06,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669943491] [2022-11-02 21:09:06,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:06,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:09:06,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:07,181 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 259 proven. 29 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2022-11-02 21:09:07,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:09:07,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669943491] [2022-11-02 21:09:07,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669943491] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:09:07,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479710882] [2022-11-02 21:09:07,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:07,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:09:07,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8a0d22b-df5d-4e67-8e1e-8a6425803fb2/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:09:07,184 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8a0d22b-df5d-4e67-8e1e-8a6425803fb2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:09:07,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8a0d22b-df5d-4e67-8e1e-8a6425803fb2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 21:09:07,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:07,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 21:09:07,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:09:07,728 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 260 proven. 0 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-11-02 21:09:07,729 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:09:07,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479710882] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:09:07,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:09:07,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-11-02 21:09:07,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750297188] [2022-11-02 21:09:07,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:09:07,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:09:07,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:09:07,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:09:07,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:09:07,733 INFO L87 Difference]: Start difference. First operand 63126 states and 68234 transitions. Second operand has 3 states, 3 states have (on average 102.0) internal successors, (306), 2 states have internal predecessors, (306), 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) [2022-11-02 21:09:08,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:09:08,539 INFO L93 Difference]: Finished difference Result 177781 states and 192211 transitions. [2022-11-02 21:09:08,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:09:08,540 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 2 states have internal predecessors, (306), 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 461 [2022-11-02 21:09:08,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:09:08,670 INFO L225 Difference]: With dead ends: 177781 [2022-11-02 21:09:08,670 INFO L226 Difference]: Without dead ends: 115469 [2022-11-02 21:09:08,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 460 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:09:08,701 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 198 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:09:08,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 493 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:09:08,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115469 states. [2022-11-02 21:09:10,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115469 to 114241. [2022-11-02 21:09:10,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114241 states, 114240 states have (on average 1.0789915966386554) internal successors, (123264), 114240 states have internal predecessors, (123264), 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) [2022-11-02 21:09:10,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114241 states to 114241 states and 123264 transitions. [2022-11-02 21:09:10,672 INFO L78 Accepts]: Start accepts. Automaton has 114241 states and 123264 transitions. Word has length 461 [2022-11-02 21:09:10,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:09:10,673 INFO L495 AbstractCegarLoop]: Abstraction has 114241 states and 123264 transitions. [2022-11-02 21:09:10,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 2 states have internal predecessors, (306), 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) [2022-11-02 21:09:10,673 INFO L276 IsEmpty]: Start isEmpty. Operand 114241 states and 123264 transitions. [2022-11-02 21:09:10,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2022-11-02 21:09:10,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:09:10,732 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:09:10,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8a0d22b-df5d-4e67-8e1e-8a6425803fb2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 21:09:10,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8a0d22b-df5d-4e67-8e1e-8a6425803fb2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-02 21:09:10,945 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:09:10,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:10,946 INFO L85 PathProgramCache]: Analyzing trace with hash -386347748, now seen corresponding path program 1 times [2022-11-02 21:09:10,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:09:10,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994421673] [2022-11-02 21:09:10,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:10,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:09:11,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:12,169 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-11-02 21:09:12,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:09:12,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994421673] [2022-11-02 21:09:12,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994421673] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:09:12,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:09:12,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 21:09:12,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576294462] [2022-11-02 21:09:12,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:09:12,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:09:12,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:09:12,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:09:12,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:09:12,172 INFO L87 Difference]: Start difference. First operand 114241 states and 123264 transitions. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 2 states have internal predecessors, (243), 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) [2022-11-02 21:09:13,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:09:13,718 INFO L93 Difference]: Finished difference Result 231332 states and 249484 transitions. [2022-11-02 21:09:13,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:09:13,719 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 2 states have internal predecessors, (243), 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 470 [2022-11-02 21:09:13,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:09:13,841 INFO L225 Difference]: With dead ends: 231332 [2022-11-02 21:09:13,841 INFO L226 Difference]: Without dead ends: 117905 [2022-11-02 21:09:13,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:09:13,865 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 184 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 21:09:13,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 110 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 21:09:13,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117905 states. [2022-11-02 21:09:15,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117905 to 117901. [2022-11-02 21:09:15,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117901 states, 117900 states have (on average 1.0775996607294318) internal successors, (127049), 117900 states have internal predecessors, (127049), 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) [2022-11-02 21:09:16,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117901 states to 117901 states and 127049 transitions. [2022-11-02 21:09:16,015 INFO L78 Accepts]: Start accepts. Automaton has 117901 states and 127049 transitions. Word has length 470 [2022-11-02 21:09:16,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:09:16,015 INFO L495 AbstractCegarLoop]: Abstraction has 117901 states and 127049 transitions. [2022-11-02 21:09:16,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 2 states have internal predecessors, (243), 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) [2022-11-02 21:09:16,015 INFO L276 IsEmpty]: Start isEmpty. Operand 117901 states and 127049 transitions. [2022-11-02 21:09:16,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2022-11-02 21:09:16,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:09:16,090 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:09:16,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-02 21:09:16,090 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:09:16,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:16,091 INFO L85 PathProgramCache]: Analyzing trace with hash 105584203, now seen corresponding path program 1 times [2022-11-02 21:09:16,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:09:16,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458352476] [2022-11-02 21:09:16,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:16,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:09:16,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:17,132 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 219 proven. 0 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2022-11-02 21:09:17,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:09:17,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458352476] [2022-11-02 21:09:17,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458352476] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:09:17,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:09:17,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 21:09:17,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132456884] [2022-11-02 21:09:17,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:09:17,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:09:17,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:09:17,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:09:17,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:09:17,135 INFO L87 Difference]: Start difference. First operand 117901 states and 127049 transitions. Second operand has 3 states, 3 states have (on average 94.0) internal successors, (282), 2 states have internal predecessors, (282), 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) [2022-11-02 21:09:18,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:09:18,624 INFO L93 Difference]: Finished difference Result 233566 states and 251776 transitions. [2022-11-02 21:09:18,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:09:18,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 94.0) internal successors, (282), 2 states have internal predecessors, (282), 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 482 [2022-11-02 21:09:18,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:09:18,794 INFO L225 Difference]: With dead ends: 233566 [2022-11-02 21:09:18,795 INFO L226 Difference]: Without dead ends: 116682 [2022-11-02 21:09:18,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:09:18,842 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 133 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 21:09:18,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 122 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-02 21:09:18,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116682 states. [2022-11-02 21:09:20,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116682 to 116681. [2022-11-02 21:09:20,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116681 states, 116680 states have (on average 1.0779996571820363) internal successors, (125781), 116680 states have internal predecessors, (125781), 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) [2022-11-02 21:09:20,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116681 states to 116681 states and 125781 transitions. [2022-11-02 21:09:20,878 INFO L78 Accepts]: Start accepts. Automaton has 116681 states and 125781 transitions. Word has length 482 [2022-11-02 21:09:20,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:09:20,879 INFO L495 AbstractCegarLoop]: Abstraction has 116681 states and 125781 transitions. [2022-11-02 21:09:20,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.0) internal successors, (282), 2 states have internal predecessors, (282), 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) [2022-11-02 21:09:20,879 INFO L276 IsEmpty]: Start isEmpty. Operand 116681 states and 125781 transitions. [2022-11-02 21:09:20,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2022-11-02 21:09:20,930 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:09:20,930 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:09:20,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-02 21:09:20,931 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:09:20,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:20,931 INFO L85 PathProgramCache]: Analyzing trace with hash 165771223, now seen corresponding path program 1 times [2022-11-02 21:09:20,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:09:20,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661116353] [2022-11-02 21:09:20,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:20,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:09:21,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:21,930 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 323 proven. 29 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-11-02 21:09:21,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:09:21,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661116353] [2022-11-02 21:09:21,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661116353] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:09:21,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576034487] [2022-11-02 21:09:21,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:21,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:09:21,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8a0d22b-df5d-4e67-8e1e-8a6425803fb2/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:09:21,933 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8a0d22b-df5d-4e67-8e1e-8a6425803fb2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:09:21,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8a0d22b-df5d-4e67-8e1e-8a6425803fb2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 21:09:22,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:22,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 21:09:22,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:09:22,391 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 366 proven. 0 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-11-02 21:09:22,391 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:09:22,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576034487] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:09:22,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:09:22,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-02 21:09:22,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818101217] [2022-11-02 21:09:22,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:09:22,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:09:22,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:09:22,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:09:22,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:09:22,394 INFO L87 Difference]: Start difference. First operand 116681 states and 125781 transitions. Second operand has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 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) [2022-11-02 21:09:24,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:09:24,178 INFO L93 Difference]: Finished difference Result 226876 states and 244785 transitions. [2022-11-02 21:09:24,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:09:24,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 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 494 [2022-11-02 21:09:24,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:09:24,326 INFO L225 Difference]: With dead ends: 226876 [2022-11-02 21:09:24,326 INFO L226 Difference]: Without dead ends: 113449 [2022-11-02 21:09:24,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:09:24,364 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 232 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 21:09:24,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 262 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 21:09:24,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113449 states. [2022-11-02 21:09:25,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113449 to 112621. [2022-11-02 21:09:25,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112621 states, 112620 states have (on average 1.0742408098028768) internal successors, (120981), 112620 states have internal predecessors, (120981), 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) [2022-11-02 21:09:25,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112621 states to 112621 states and 120981 transitions. [2022-11-02 21:09:25,982 INFO L78 Accepts]: Start accepts. Automaton has 112621 states and 120981 transitions. Word has length 494 [2022-11-02 21:09:25,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:09:25,983 INFO L495 AbstractCegarLoop]: Abstraction has 112621 states and 120981 transitions. [2022-11-02 21:09:25,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 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) [2022-11-02 21:09:25,983 INFO L276 IsEmpty]: Start isEmpty. Operand 112621 states and 120981 transitions. [2022-11-02 21:09:26,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2022-11-02 21:09:26,032 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:09:26,032 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:09:26,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8a0d22b-df5d-4e67-8e1e-8a6425803fb2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 21:09:26,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8a0d22b-df5d-4e67-8e1e-8a6425803fb2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:09:26,234 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:09:26,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:26,235 INFO L85 PathProgramCache]: Analyzing trace with hash -344733684, now seen corresponding path program 1 times [2022-11-02 21:09:26,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:09:26,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181807528] [2022-11-02 21:09:26,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:26,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:09:26,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:27,402 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 324 proven. 9 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2022-11-02 21:09:27,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:09:27,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181807528] [2022-11-02 21:09:27,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181807528] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:09:27,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304315266] [2022-11-02 21:09:27,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:27,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:09:27,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8a0d22b-df5d-4e67-8e1e-8a6425803fb2/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:09:27,407 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8a0d22b-df5d-4e67-8e1e-8a6425803fb2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:09:27,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8a0d22b-df5d-4e67-8e1e-8a6425803fb2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 21:09:27,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:27,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 844 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 21:09:27,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:09:28,065 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 300 proven. 0 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2022-11-02 21:09:28,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:09:28,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304315266] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:09:28,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:09:28,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-02 21:09:28,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999235333] [2022-11-02 21:09:28,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:09:28,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:09:28,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:09:28,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:09:28,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-02 21:09:28,068 INFO L87 Difference]: Start difference. First operand 112621 states and 120981 transitions. Second operand has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 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)